lzqj manual

EMH Elektrizitätszähler GmbH & Co KG

Edition: 28.06.2004 LZQJ-PHB-E-12

Product Manual LZQJDigital 4-Quadrant-/ Combi Meter with Load Profile Memory

2

LZQJ-PHB-E-12 © 2004 EMH Elektrizitätszähler GmbH & Co KG

All information in this manual corresponds to the state of technological develop-ment and is subject to change.

If you have any questions or inspirations you can contact us:

EMH ElektrizitätszählerGmbH & Co KG

Südring 5D - 19243 Wittenburg

Tel.: +49(0)3 88 52 – 645-0Fax.: +49(0)3 88 52 – 645-29

Email: [email protected]: www.emh-meter.de

EMH Elektrizitätszähler GmbH & Co KG is certifiedaccord. to DIN ISO 9001:2000.

mailto:[email protected]

www.emh-meter.de

3


Prologue

In this manual all design variants from the product familiy LZQJ are described.Please note that the meters can be designed differently for configuration, inter-faces, in-/outputs etc. It is therefore possible that meter features are describedwhich do not apply to the meter(s) used by you.

Safety tips

The meters are to be used exclusively for measuring electrical energy and mustonly be operated within the specified technical data (see also name plate).

When installing or changing the meter, the conductor to which the meter is con-nected must be de-energised. Contact of parts under voltage is extremely dan-gerous. Therefore the relevant back-up fuse is to be removed and stored so thatother people cannot insert this unnoticed.

Before opening the meter the secondary circuit to the current transformer mustdefinitely be short circuited. The high voltage on the current transformer is ex-tremely dangerous and destroys the current transformer.

S0 inputs lead to network potential. Caution: danger!

The local standards, guide lines, regulations and instructions are to be obeyed.Only authorised personnel are permitted to install the electricity meters.

Mounting and installation

LZQJ meters are designed for wall mounting accord. to DIN 43 857-2. When connecting the meter it is very important to take notice of the wiring dia-gram, which you can find inside the terminal cover and also on the delivery docu-ments. In chapter „6. Circuit diagrams (examples)” you can find examples of wir-ing diagrams.

Meters for direct connection are to be fused against short circuits with a back-upfuse of 63A or 100A and meters with a transformer connection in the voltage cir-cuit with < 10A.

4


Table of Contents

1. 4-Quadrant meter and Combi meter........................................ 7

1.1. Combi meter ................................................................................................71.2. 4-Quadrant meter ........................................................................................8

2. Standards ................................................................................. 9

3. Meter elements....................................................................... 10

3.1. Layout of the meter....................................................................................103.2. Layout of the display .................................................................................11

4. Technical description............................................................. 13

4.1. Technical specification ..............................................................................134.2. Function circuit diagram............................................................................15

4.2.1. Direct connection version ................................................................154.2.2. Transformer connection version ......................................................15

4.4. Modules .....................................................................................................164.4.1. Power unit ........................................................................................16

4.4.1.1. Auxiliary voltage supply ..........................................................174.4.2. Data protection ................................................................................194.4.3. Protective circuit...............................................................................194.4.4. Modular construction .......................................................................19

4.5. Digital measuring mechanism...................................................................204.5.1. Measurement principle ....................................................................20

4.5.1.1. Voltage measurement.............................................................204.5.1.2. Current measurement .............................................................204.5.1.3. Measurement values...............................................................204.5.1.4. Adjustment ..............................................................................20

4.6. Tariff mechanism .......................................................................................214.6.1. OBIS (Object-Identification-System) ...............................................214.6.2. Energy and power tariffs..................................................................22

4.6.2.1. Maximum demand metering...................................................224.6.2.2. Measuring period tm ................................................................224.6.2.3. Decoupling time te...................................................................224.6.2.4. Output contacts ......................................................................234.6.2.5. Reset (cumulation) ..................................................................234.6.2.6 Load profile ..............................................................................24

4.7. Tariff time switch ........................................................................................254.8. Ripple control receiver (RCR)....................................................................264.9. Data interfaces...........................................................................................26

4.9.1. Optical interface D0 .........................................................................264.9.2. Electrical interface RS485................................................................274.9.3. Electrical interface RS232................................................................284.9.4. Electrical interface CL0 (CS)............................................................28

4.10. Inputs and Outputs..................................................................................294.10.1. Inputs .............................................................................................294.10.2. Outputs ..........................................................................................294.10.3. Optical fibre interface LLS .............................................................29

4.11. Instrument software .................................................................................30

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5. Meter operation ...................................................................... 31

5.1. Operating and display ...............................................................................315.1.1. Principle mode of actions of the operation and display .................325.1.2. Display and control ..........................................................................41

5.1.2.1. Operation display....................................................................425.1.2.2. Display test..............................................................................425.1.2.3. Call-up mode Menu A-button .................................................435.1.2.4. Call-up mode standard (Menu option „Std-dAtA”) ................435.1.2.5. Call-up mode load profile (Menu option „P.01”) ....................435.1.2.6. Call-up mode, certification relevant logbook (Menu option„P.99“) ..................................................................................................445.1.2.7. Call-up mode menu R-button .................................................455.1.2.8. Set mode (menu option „SEt“) ...............................................455.1.2.9. Call-up mode info (Menu option „InFO-dAtA”) ......................455.1.2.10. Test mode (Menu option „tESt”)...........................................465.1.2.11. Parameter mode ...................................................................46

6. Circuit diagrams (examples).................................................. 47

6.1. Transformer-operated meter for three phase four-wire systems..............476.2. Transformer-operated meter for three phase three-wire systems............486.3. Three phase meter for direct connection in four-wire systems ................48

7. Housing .................................................................................. 49

7.1. Base plate..................................................................................................497.2. Meter cover ................................................................................................497.3. Terminal block for transformer-operated meter ........................................497.4. Terminal block for direct connection 60A..................................................507.5. Terminal block for direct connection 100A................................................50

8. Ordering code ........................................................................ 51

9. Software tools......................................................................... 52

9.1. EMH-COMBI-MASTER 2000 .....................................................................529.2. COMBI-TOOL ............................................................................................539.3. TRANSFORMER-TOOL .............................................................................54

6


Figure- and table index

Figure 1: OBIS code Combi meter............................................................................7Figure 2: OBIS code 4-Quadrant meter....................................................................8Figure 3: Operating elements .................................................................................10Figure 4: Display......................................................................................................11Figure 5: Function circuit diagram of the Standard-4-Quadrant-/Combi meter ....15Figure 6: Function circuit diagram of the Precision meter......................................15Figure 7: Optical fibre isolation relay box................................................................30Figure 8: Depiction of the changing of the display modes ....................................32Figure 9: Depiction of the call-up: menu A-button .................................................33Figure 10: Depiction of the single call-up ...............................................................34Figure 11: Depiction of the load profile call-up.......................................................35Figure 12: Depiction of the call-up: Calibration relevant logbook ..........................36Figure 13: Depiction of the call-up: menu R-button ...............................................37Figure 14: Depiction of the set mode .....................................................................38Figure 15: Depiction of the info list .........................................................................39Figure 16: Depiction of the test mode ...................................................................40Figure 17: Dimensions ............................................................................................49

Table 1: Auxiliary voltage supply.............................................................................18Table 2: Isolating transformers available ................................................................18Table 3: Apparent power recording ........................................................................18Table 4: Examples of OBIS codes ..........................................................................21Table 5: Inhibition times for resettings ....................................................................24Table 6: Load profile depth per channel.................................................................24Table 7: RS485-interface.........................................................................................27Table 8: RS232-interface.........................................................................................28Table 9: CL0-interface .............................................................................................28Table 10: Operation display (Example)...................................................................42Table 11: Cable diameter ........................................................................................51

7


1. 4-Quadrant meter and Combi meter

The Combi meter and 4-Quadrant meter are identical in appearance and belongto the same family of devices. The Combi meter is produced in large lots and hasbecome widely used. The Combi meter and 4-Quadrant meter are the top of theline product and state of the art in hardware and software.

1.1. Combi meter

The Combi meter replaces measurement sets which consist of two Ferraris me-ters, an active use meter (OBIS code 1.x.x) and a reactive use meter (OBIS code3.x.x). In addition, the Combi meter can perform reactive use measurementseparately in quadrants 1 and 4 (OBIS code 5.x.x and 8.x.x) The Combi meter iscapable of depicting the measurements according to the OBIS code system (IEC62 056-61) which is illustrated in Figure 1.

Assigning OBIS codes to the quadrants for the Combi meter:

Figure 1: OBIS code Combi meter

Reactiveconsumptionimport

Activeconsumptionexport

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1.2. 4-Quadrant meter

The 4-Quadrant meter replaces the classical constellation of 4 Ferraris meterseach comprising of an active consumption meter for imported and exported en-ergy and also each comprising of an reactive consumption meter for importedand exported energy. The 4-Quadrant meter is able to depict the codes in Figure2 from the OBIS code system.

Assigning OBIS codes to the quadrants for the 4- quadrant meter:

Figure 2: OBIS code 4-Quadrant meter

Reactiveconsumptionimport

Activeconsumptionexport

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2. Standards

IEC 62053-22 Electricity metering equipment (AC) - Particular (former IEC 687) requirements - Part 22: Static meters for active energy

(Class 0.2S and 0.5S)

IEC 62053-21 Alternating current static watt-hour meters for(former IEC 61036) active energy (Class 1 and 2)

IEC 62053-23 Alternating current static var-hour meters for reactive(former IEC 61268) energy (Class 2 and 3)

IEC 62056-21 Data exchange for meter reading, tariff and load (former IEC 61107) control - Part 21: Direct local data exchange

ITU-T V.11 Electrical characteristics for balanced double-currentinterchange circuits operating at data signalling ratesup to 10 Mbit/s

TIA/EIA-485 Electrical characteristics of generators & receivers foruse in balanced digital multipoint systems

ITU-T V.24 List of definitions for interchange circuits betweendata terminal equipment (DTE) and data circuit-terminating equipment (DCE)

ITU-T V.28 Electrical characteristics for unbalanced double-current interchange circuits

DIN 43 857- 2 Watthour meters in moulded insulation case withoutinstrument transformers, up to 60 A rated maximumcurrent; principal dimensions for poly-phase meters

DIN 43 857- 4 Watthour meters in moulded insulation case withoutinstrument transformers, up to 60 A rated maximumcurrent; principal dimensions for meter terminal coverfor poly-phase meters

IEC 62 056-61 Electricity metering - Data exchange for meter read-ing, tariff and load control - Part 61: Object Identifica-tion System (OBIS)

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LZQJ-PHB-E-12 © 2004 EMH Elek

3. Meter elements

3.1. Layout of the meter

Figure 3: Operating elements

1. LC-Display2. Optical call-up sensor3. Parametering key (under meter cover)4. Mechanical call-up button5. Sealable instrument transformer plate6. Sealable terminal cover7. Impulse LED8. Optical data interface D0 with magnetic fixing for the op

head9. Mechanical reset button (sealable)

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LZQJ-PHB-E-12

3.2. Layout of the display

The display is laid out as follows:

Figure 4: Display

The operating display from the meter (inductivflowing, then a status syured (quadrant informat

The communication dister via data interfaces (o

The display of the phasages. With an incorrect

In the code area the me

In the value area the munits.

Operating display(Quadrant information)

T1 T2 T3

Communicationdisplay

©

represents the currente/capacitive reactive mbol alternatively shoion), e.g.:

play appears when tptical, electrical).

es signalizes the conrotating field all of the

asuring values are sh

easuring values are re

T4 M1 M2 M3

Display ofphases

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energy import as it was mpower). If consumption cuws which quadrant is be

here is communication w

nection of the individual three symbols flash.

own on the basis of the O

presented with the corres

M4 RCR RL CLOC

Unit

K SET

OBIS Code area
Value area Cursor field
easuredrrent is

ing meas-

1st quadrant +P/+Q

2nd quadrant - P/+Q

3rd quadrant - P/- Q

4th quadrant +P/- Q

11

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BIS code.

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In the cursor field the operating conditions of the meters are represented.The black arrows show which tariff and maximum demand is activated and viawhich tariff control element (RTC or RCR) the meter is controlled.

T1-T4 Tariff information for energy. All activable tariff registers are declaredon the nameplate.

M1-M4 Tariff information for power. All actionable tariff registers are declaredon the nameplate.

RCR The cursor flashes when the internal RCR is activated and ready to re-ceive. The relevant cursor is switched on continuously when the inter-nal ripple clock is receiving a telegram.

RL The cursor flashes for the duration of the activation of a reset interlock.

Clock The cursor is continually switched on if the internal appliance clockcontrols the tariff switching. The cursor flashes when the appliancesclock running reserve is exhausted and when the appliances clock cannot be set afterwards.

SET The relevant cursor is switched on when the meter is in the set mode.

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4. Technical description 4.1. Technical specification

Direct connection version5(60) A or 10(100) A

Transformer connection version Cl. 1

Voltage 4-wire meter 3x127/220 V...3x240/415 V 3x58/100 V...3x240/415 V,optional up to 3x400/690 V

3- wire meter 3x220 V...3x415 V 3x100 V..3x415 V,optional up to 3x690 V

2- wire meter --- 1x58 V...1x240 V

Current 5(60) A or 10(100) A 5II1A

Frequency 50 Hz, 60 Hz 50 Hz, 60 Hz, 162/3 Hz

Accuracy active energy Cl. 2, optional Cl. 1 Cl. 1reactive energy Cl. 3, optional Cl. 2 Cl. 2

Measuring system designation hall sensor compensated current transformer

Measuring types active energy P+, P-reactive energy Q+, Q-, Q1, Q2, Q3, Q4others S, Ah, U2h, I2h

Meter constants LED (Imp./kWh[kvarh]) 500...1 000 (depending on meter type) 10 000...40 000 (depending on meter type)output (Imp./kWh[kvarh]) 250...500 (depending on meter type) 5 000...20 000 (depending on meter type)configuration ability after certification by means of the certification relevant logbook

Energy registers maximum number 32 tariff registers + tariffless register, each with 15 historical values

Maximum registers maximum number 32 tariff registers + tariffless register, each with 15 historical values measuring period 1, 5, 10, 15, 30, 60 min, adjustable

Load profile maximum number of channels 32typical memory depth at 1 channel 317 daysregistering period 1, 5, 10, 15, 30, 60 min, adjustableregistering type power, energy, energy feed

Real Time Clock accuracy within ± 5 ppmsynchronisation via data interfaces, control input or DCF-modulerunning reserve battery / capacitor > 20 years / > 10 days

Ripple control receiver number of channels / telegrams 6 / all common telegrams

Control inputs S0-input/system voltage max. 1 / max. 6

Data retention time without voltage in the FLASH-ROM, at least 10 years

Display display version VDEW-display 84 mm x 24 mm, height of digits 8 mmalternative display version alphanumerical display 4 x 20 characters

Operation mechanical buttons for operation of display and resetoptical sensor for operation of display

Data interfaces optical data interface optical data interface D0electrical data interface RS485, CL0 or RS232data protocols IEC 62056-21 or DLMSmaximum transmission rate 9600 Baud (fixed or Mode C)

Outputs number max. 6 max. 7Opto-MOSFET max. 250 V AC/DC, 100 mA, make contact and break contactS0-output max. 27 V DC, 27 mArelays max. 250 V AC/DC, 100 mA (max. 2 relays)

Energy supply switched-mode power supply 3-phasemains buffering time > 500 ms

Auxiliary voltage supply longe-range --- 48...300 V AC/DC

Power consumption per phase voltage path(Basic meter) with auxiliary voltage --- < 0.02 VA / < 0.01 W (3x58/100 V)

without auxiliary voltage < 1.3 VA / < 0.8 W < 1.3 VA / < 0.8 Wcurrent path < 0.01 VA < 0.004 VAauxiliary voltage --- < 1.8 VA...< 2.9 VA

Electrical parameters isolation resistance isolation: 4 kV AC, 50 Hz, 1 min.surge voltage surge voltage: 8 kV, impulse 1.2/50 µs, 2 Ω (measuring path, auxiliary voltage)

6 kV, impulse 1.2/50 µs, 500 Ω (outputs: Opto-MOSFET, relay)resistance against HF-fields 30 V/m (with load)

Temperature range operating / limit and storage -25°C...+55°C / -40°C...+70°C

Relative humidity 90% at 40°C, non-condensing

Housing dimensions accord. to DIN 43857class of protection class of protection 2degree of protection: housing/terminal block IP 51 / IP 31housing material polycarbonate glass-fibre-reinforced, recyclablefire characteristics flame-inhibiting (without halogen)weight 1.6 kg 1.35 kg

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Precision meterCl. 0.5

Precision meterCl. 0.2

Voltage 4-wire meter 3x58/100 V...3x240/415 V,optional up to 3x400/690 V

3- wire meter 3x100 V..3x415 V,optional up to 3x690 V

2- wire meter 1x58 V...1x240 V

Current 5II1A

Frequency 50 Hz, 60 Hz, 162/3 Hz

Accuracy active energy Cl. 0.5 Cl. 0.2reactive energy 1% (Cl. 2) 0,5% (Cl. 2)

Measuring system designation compensated current transformer

Measuring types active energy P+, P-reactive energy Q+, Q-, Q1, Q2, Q3, Q4others S, Ah, U2h, I2h

Meter constants LED (Imp./kWh[kvarh]) 10 000...100 000 (depending on meter type)output (Imp./kWh[kvarh]) 5 000...50 000 (depending on meter type)configuration ability after certification by means of the certification relevant logbook

Energy registers maximum number 32 tariff registers + tariffless register, each with 15 historical values

Maximum registers maximum number 32 tariff registers + tariffless register, each with 15 historical values measuring period 1, 5, 10, 15, 30, 60 min, adjustable

Load profile maximum number of channels 32typical memory depth at 1 channel 317 daysregistering period 1, 5, 10, 15, 30, 60 min, adjustableregistering type power, energy, energy feed

Real Time Clock accuracy within ± 5 ppmsynchronisation via data interfaces, control input or DCF-modulerunning reserve battery / capacitor > 20 years / > 10 days

Ripple control receiver number of channels / telegrams 6 / all common telegrams

Control inputs S0-input/system voltage max. 1 / max. 6

Data retention time without voltage in the FLASH-ROM, at least 10 years

Display display version VDEW-display 84 mm x 24 mm, height of digits 8 mmalternative display version alphanumerical display 4 x 20 characters

Operation mechanical buttons for operation of display and resetoptical sensor for operation of display

Data interfaces optical data interface optical data interface D0electrical data interface RS485, CL0 or RS232data protocols IEC 62056-21 or DLMSmaximum transmission rate 9600 Baud (fixed or Mode C)

Outputs number max. 7Opto-MOSFET max. 250 V AC/DC, 100 mA, make contact and break contactS0-output max. 27 V DC, 27 mArelays max. 250 V AC/DC, 100 mA (max. 2 relays)

Energy supply switched-mode power supply 3-phasemains buffering time > 500 ms

Auxiliary voltage supply longe-range 48...300 V AC/DC

Power consumption per phase voltage path(Basic meter) with auxiliary voltage < 0.02 VA / < 0.01 W (3x58/100 V)

without auxiliary voltage < 1.3 VA / < 0.8 Wcurrent path < 0.004 VAauxiliary voltage < 1.8 VA...< 2.9 VA

Electrical parameters isolation resistance isolation: 4 kV AC, 50 Hz, 1 min.surge voltage surge voltage: 8 kV, impulse 1.2/50 µs, 2 Ω (measuring path, auxiliary voltage)

6 kV, impulse 1.2/50 µs, 500 Ω (outputs: Opto-MOSFET, relay)resistance against HF-fields 30 V/m (with load)

Temperature range operating / limit and storage -25°C...+55°C / -40°C...+70°C

Relative humidity 90% at 40°C, non-condensing

Housing dimensions accord. to DIN 43857class of protection class of protection 2degree of protection: housing/terminal block IP 51 / IP 31housing material polycarbonate glass-fibre-reinforced, recyclablefire characteristics flame-inhibiting (without halogen)weight 1.6 kg

15


4.2. Function circuit diagram

4.2.1. Direct connection version

Figure 5: Function circuit diagram of the direct connection version

4.2.2. Transformer connection version

Figure 6: Function circuit diagram of the transformer connection version

Hall-sensor

Hall-sensor

Hall-sensor

Divider

Divider

Divider

Amplifier

Amplifier

Amplifier

U1

I1

U2

I2

U3

I3

ADC 2

ADC 3

ADC 4

ADC 5

ADC 1

ADC 6

Supply electronicsProtectivecircuit

Switchedmodepowersupply

Data in/out

D0

CL0

RS-232

RS-485

Outputs

7 control inputsor

6 control inputs + 1S0Imp.LEDLC-DisplaySensors/Buttons

FLASH

RTC

RAM

LLS max 6 S0/MOSFET

or2 relays

plus 5 S0/MOSFET

CPU

N

Supply electronics

UH1

N

Data in/out

D0

CL0

RS-232

RS-485

Outputs

7 control inputsor

6 control inputs + 1S0Imp.LEDLC-DisplaySensors/Buttons

FLASH

RTC

RAM

LLS max 7 S0/MOSFET

or2 relays

plus 5 S0/MOSFET

ADC 2

ADC 3

ADC 4

ADC 5

ADC 1

ADC 6

CPU

External auxiliary voltage

Compensatedcurrent transformer

U1

I1


U2

I2


Divider

Divider

DividerU3

I3

Protectivecircuit

UH2Protectivecircuit

Switchedmodepowersupply

16


4.4. Modules

The meter consists of two essential elements:

• digital measuring mechanism• tariff mechanism

The measuring mechanism is decisive for the accuracy of the meter. It determinesthe basic measurements, transforms them into digital information and conveysthem to the tariff mechanism for calculation and processing.The experience in meter testing technology has been used to obtain this high de-gree of meter accuracy. Both modules, the measuring and tariff mechanisms, arecharged with a common power unit.

4.4.1. Power unit

This is a primary, switched-mode power unit (3x58/100V ... 3x240/415V) with ahigh degree of effectiveness. 3-wire meters with 3x100V ... 3x415V are also sup-ported. The power supply is earth-fault-proof and operation without neutral con-ductor is guaranteed. In the event that a module defect occurs when operatingthen it is secure against overload or short circuiting. Potential damage remainslimited and consequential damage is avoided.

For LZQJ meters with a single-phase connected meter, error-free operation untilUnom - 20% is guaranteed.

17


4.4.1.1. Auxiliary voltage supply

Only valid for LZQJ-P2 ... and LZQJ-P5 ... (Precision meters with an accuracy of0,2S and 0,5S)!

The LZQJ as a precision meter has the possibility of external auxiliary voltage.

In general it is differentiated between two functionality’s (qualities):

a) Pure auxiliary voltage supply: The energy is only taken from the auxiliaryvoltage circuit.

b) Combined supply: With certain occurring voltage conditions the energy forthe electronic measuring device is no longer taken from the auxiliary voltagesupply but from the measuring voltage(s). When the auxiliary voltage supplycompletely fails then the energy for the electronic measuring device is takenonly from the measuring voltage (feature of the combined supply). In spite ofthe auxiliary voltage failure the meter is completely capable of functioning (ad-vantage when compared to pure auxiliary voltage supply).

The following design variants of the auxiliary voltage are possible:

Type 1Design with pure auxiliary voltage supply and galvanic separation between theauxiliary- and measuring circuit (2kV AC, 1min).

Type ZCombined supply independent of the measuring voltage without galvanic sepa-ration between the auxiliary- and measuring circuit. The auxiliary voltage supply isonly effective when the auxiliary voltage is larger than the measuring voltage. Withless auxiliary voltage or failure of the auxiliary voltage the functions of the deviceare assured by the measuring voltage.

Type RCombined supply independent of the measuring voltage without galvanic sepa-ration between the auxiliary- and measuring circuit. With failure of the auxiliaryvoltage the functions of the device are assured by the measuring voltage.

Type 2Combined supply independent of the measuring voltage with galvanic separa-tion (4kV AC, 1min) between the auxiliary- and measuring circuit accord. to classprotection 2. With failure of the auxiliary voltage the functions of the device are as-sured by the measuring voltage.

18

LZQJ-PHB-E-12

Type1) =Y Functionality(qualities)

Measuring voltageeffective on meter types

Effectiveauxiliary voltage range

Range of functionswithout auxiliary

voltage

Galvanic separation

1 Pure auxiliary voltagesupply all 48V – 300VAC/DC - 2kV, 1min

3x 58/100V, 3x 100V,1x100V

100V – 300VAC145V – 300VDC

Z Combined supply

3x 63/110V,3x110V,1x110V

110V – 300VAC160V – 300VDC

R Combined supply all 80V – 130VAC/DC

-

2 Combined supplyClass protection 2

all 48V – 300VAC/DC

Measuring voltage± 20%

Class protection 24kV, 1min

Table 1: Auxiliary voltage supply

The types 1, Z, R, 2 originated due to different application requirements.In order to realise the types 1, Z and R in addition to these requirementsalso in class of protection 2 we recommend for auxiliary voltage supplywith alternating voltage to connect in series an isolating transformer in theauxiliary circuit.Table 2 shows all available designs.

Order code Uprimary Usecondary

TTR-225G-00 230 V 230 V

TTR-215G-00 230V 110 V

TTR-335G-00 100 - 110 V 100 - 110 V

With suppliepaths in theTable 3).

Type1) =Y

Z, R, 2

1

Z, R

2

1

Table 3: Appare

1) Type code

combined and 2, how

Meters witage of 3x53x63/110Vply indepeing voltagenot given fone phase

A long-range in themeasuring path isonly possible with

supply of the types Rever not with type Z .

h a measuring volt-8/100V and and combined sup-ndent of the measur- a meter start-up isor power supply and nominal voltage.

© 2004 EMH Elektrizitätszähler GmbH & Co KG

Table 2: Isolating transformers available

d auxiliary voltage in the effective auxiliary voltage range (see Table 1) a disburden of the voltage measuring device takes place, whereby the apparent power consumtion is then much lower (see

Measuring voltage Apparent power recordingper measuring path

3x58/100V up to 3x63/110V resp. 3x100V/3x110V with combined supply

3x58/100V up to 3x63/110V resp. 3x100V/3x110V with pure combined supply0.02VA

3x230/380V up to 3x240/415V resp. 3x380V/3x415V with combined supply 0.3VA

3x230/380V up to 3x240/415V resp. 3x380V/3x415V with combined supply class protection 2

3x230/380V up to 3x240/415V resp. 3x380V/3x415V with pure auxiliary voltage supply

3x400/690V resp. 3x690V with pure auxiliary voltage supply

0.1VA

nt power recording

: LZQJ-PXXX- Y X-XXX-XX-XXXXXX-XXX

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4.4.2. Data protection

When operating, the current measurements are stored in the working memory(RAM). Every 24 hours, this data is stored in a non-volatile memory. In the event ofpower failure or drop below the minimum voltage, the electronics will continue tofunction normally for the next 500ms. It is powered by the energy in the charger-capacitor. If it is only a short power failure of less than 500 ms, then the meter willcontinue to operate quasi-non-stop. Only in cases of longer interruptions will themeasuring period be interrupted and the device completely shut down so that anew measuring period will be started when the meter is reactivated. Data remainsstored in the non-volatile memory for at least ten years. No buffer battery isneeded to preserve the data. The data received is retained alone through thequalities of the storage medium (Flash).

4.4.3. Protective circuit

The protective circuit behind the voltage terminals consists of a combination ofsurge-proof power resistors and varistors which dilute the surge energy in theevent of an over-voltage. This means: fast, energy-rich disturbance pulses whichmight be caused by turning off reactive loads or the local transformer are effec-tively prevented from reaching the microelectronics.

4.4.4. Modular construction

The entire measuring and tariff mechanism (including the options) are included ona single circuit board:

• clock module• tariff time switch• ripple control receiver• electrical interfaces• control inputs• control outputs

The modular structure of the entire meter means that the meter can be assembledto perform functions in accordance with the customer’s desired meter properties.The display is plugged onto the circuit board and can be easily exchanged.

20


4.5. Digital measuring mechanism

4.5.1. Measurement principle

Measurement is performed by taking voltage and current samples at very shortintervals. These samples are converted to digital values in an analogue to digital-converter. The digitized current and voltage values are assigned to a microproc-essor and then processed. This guarantees a very high accuracy and stability.

4.5.1.1. Voltage measurement

The terminal voltages generate network-proportional internal voltage levels. Theseare fed into the input channels of the analogue-digital-converter (ADC).

4.5.1.2. Current measurement

Meters for direct connection:The current paths contain gapped ferrite cores and in their air gap there are hallsensors which generate current proportional voltages (Hall voltage). These are fedinto the input channels of the analogue digital converter (AD) via an instrumentamplifier.

Meters for transformer connection:For measuring the current, compensated current transformers are used.These are fed into the two ADC inputs via an instrumental amplifier.

4.5.1.3. Measurement values

The measurement values can be seen on the display and read out using the D0-interface or electrical interface (RS232, RS485, CL0):

• instantaneous active-, reactive- and apparent power for each phase and thecombined value,

• individual line current and line voltages, • number of active phases, line frequency and power factor as well as power

factor for individual phases.

4.5.1.4. Adjustment

EMH’s Combi meter and 4-Quadrant meter are fully static and digital meters. Inpractice, that means there are no mechanical moving parts in the measuring de-vice. That also means that the electronic components’ tolerances are matched toeach other in a way so that a partial adjustment between manufacturing steps isunnecessary. Thus the devices can be produced rationally in identical series.At the end of the production process, the meters are subjected to a final adjust-ment. The meters are submitted to a precise normal load on the test stand. Eachmeter measures this load and transmits its measurement to the test stand via anoptical interface. This compares the meter’s measurement with its own precisemeasurement and sends measurement correction factors back in the meter inform of measurement constants. These are then stored in the non-volatile memoryelements of the meter. The adjustment constants are protected against externalaccess.

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4.6. Tariff mechanism

Using digitized measurement values, the tariff mechanism calculates electricityconsumed or supplied as well as electrical power. It then assigns it to the respec-tive energy or power register according to the tariff control and meter configura-tion provided.

4.6.1. OBIS (Object-Identification-System)

The Object-Identification-System OBIS is an identification system which was pri-mary developed for electricity purposes and is described in IEC 62 056-61. Itserves to identify measured values and data which, through this system are clearlyidentifiable independent of the device and producer. Due to the very generalstructure OBIS is also suitable for the areas water, gas and heat.

In the field of measuring electrical energy and power, the identification code allo-cation for the measured variable (1. value), measured type (2. value), tariff (3. value) and historical value (4. value) is of importance.

In Table 4 codes are described which are often used with EMH electricity meters.

Measuring type C1.x.x.x Active energy + (import)2.x.x.x Active energy – (export)3.x.x.x Reactive energy + (import)4.x.x.x Reactive energy – (export)5.x.x.x Reactive energy Q I..8.x.x.x Reactive energy Q IV

Measuring variable D

x.2.x.x Cumulative (sum of the reset maximum demand)x.4.x.x Passed time of the measuring period + average value of the

current measuring periodx.5.x.x Average value of the last measuring periodx.6.x.x Maximum demand + time stamp (time, date season)x.8.x.x Energyx.29.x.x Energy feed

Tariff E

x.x.n.x Tariff , n = 0 .. 4

Historical values F

x.x.x.n historical values, n = 0 .. 99 (with reference to the reset counter)

Table 4: Examples of OBIS codes

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4.6.2. Energy and power tariffs

With the meters it is possible to configure up to 32 meter mechanisms for electri-cal energy and power. Each meter mechanism has up to 15 historical valueswhich show the measurements and time stamps of the last 15 reset billing periods. The assignment of the measurement variables are configured at EMHaccording to customer requirements.4.6.2.1. Maximum demand metering

The creation of a maximum is based on the measurement of average power overa synchronized or sliding measuring period tm. The time integral of the accuredenergy is divided by the measurement period. If the current power value exceedsthe highest power value since the beginning of the billing period, then this value istaken as the new maximum in the affected register with the applicable measuringperiod time stamp.

4.6.2.2. Measuring period tm

The measuring period duration tm is derived from the line frequency and definedby a period generator in the meter. The length of the measurement period can beconfigured as a 1, 2, 3, 5, 10, 15, 30 or 60 minute raster according to customerrequirements.

Occasional maximum demand measurement

The beginning of a maximum demand measurement (and thereby of a measure-ment period) is started by an

internal switch signal from the:

• tariff time switch• ripple control receiver, or

externally via a switch signal from one of the supplementary terminals at the:

• control input S0 • a control input configured for this purpose (device voltage).

4.6.2.3. Decoupling time te

In order to control other devices (e.g. a maximum demand monitor), a decouplingsignal te can be generated at either an output (aux. terminal) or an optical fibre in-terface. The regulation VDE 0418 Part 4 specifies that the decoupling time is not toexceed either of the following values:

• 1% of the measuring period or• 15 seconds

23


This decoupling period is a component of the measuring period and is generatedat the beginning. The decoupling time for the measuring periods most commonlyused in Europe, 15 minutes (= 900 s) therefore the decoupling time is 9 seconds.Electronic maximum demand meters need nearly no reset time. The speed of thesoftware running time and rapid switching in the semiconductor element lie at amaximum in the millisecond range. Although the decoupling signal is emitted ac-cording to regulations, the electronic maximum demand meter continues tomeasure during this period.

4.6.2.4. Output contacts

Altogether up to 7 output contacts are provided for transmissions to the customer.These output contacts are optionally S0 outputs, relays (max 2) or MOSFET out-puts. S0 and MOSFET outputs can be either make or break contacts. If the out-put element is a relay the output can be a changeover contact. If the outputs listedhere are not insufficient or if a future-oriented conception is to be applied, then it isrecommended to use the option optical fibre interface for the separate connectionof an optical fibre isolating relay box. The advantages are explained in chapter“Optical fibre interface LLS”.

4.6.2.5. Reset (cumulation)

The introduction of electronics into metering has meant that the scope of functionswhich resetting can perform has been significantly expanded. The results are asfollows:

• interruption of current measuring period• saving of current maximum demand in the appropriate historical value mem-

ory• cumulation of current maximum demand in the cumulation register• reset to zero of maximum demand mechanism• reset to zero of current average power • saving of occurred energy values at reset time• activation of reset block

Resetting can be activated by one of the following reset types:

• optical reset sensor or mechanical reset button• internal tariff time switch• internal ripple control receiver• external control input• optical data interface D0• electrical data interface, e.g. RS232, RS485 or CL0

After a reset, a temporal restricted inhibition is activated for a new resetting de-pendent of the selected reset channels 1-5 (see Table 5). This inhibition lasts atleast one measuring period and 40 days at the most. With every resetting the in-hibition time is newly activated. There are two different lengths of inhibition times,0 and t1. 0 is a synonym that shows that no inhibition has been activated. In thetable it is shown which inhibition times are activated by a resetting through the re-set channels 1-5.

24


Example: A resetting via the channel „button” blocks a new resetting via the samechannel (button) or via other channels (interfaces ... period counter) for differenttime intervals.

Inhibition times for new resets via: 1 2 3 4 5Initiation of a resetting via ...

1 ... Optical sensor or push button t1 0 0 0 02 ... Interfaces (optical, electrical) 0 t1 0 0 03 ... Connectors (connector block) 0 0 t1 t1 t1

4 ... Internal ripple control receiver (RCR) 0 0 t1 t1 t1

5 ... Internal Real Time Clock or internal period counter 0 0 t1 t1 t1

Table 5: Inhibition times for resettings

The reset barriers are cancelled by a 3 phase voltage failure. For every reset therelevant time information is (timestamp) stored. The reset counter runs from 0-99(rolling) and serves simultaneously as an index for the historical values.

4.6.2.6 Load profile

The integrated load profile in the meter has the following memory depths(at tm = 15min, 2 header per day and the format x.xxx kW):

No of channels Days at tm = 15min

1 approx. 300

2 approx. 200

4 approx. 100

6 approx. 80

Table 6: Load profile depth per channel

The number of channels lies between 1 and 6 (optional up to 32). They are con-figurable so that a measurement variable may be assigned to each channel. Theload profile always operates synchronized. A new measuring period (for tm = 15minutes) commences at every full hour on the real time clock in the meter: thatmeans at hh:00, hh:15, hh:30 and hh:45. In the event of a voltage failure, the cur-rent time is stored in the data memory.

After power restoration, two methods are differentiated between:

a) Power restoration within the current measuring period = no new measuringperiod is created, the current measuring period continues.

Power restoration outside the current measuring period = a new measuringperiod is formed.

b) With each power restoration a new measuring period is created.

The load profiles are shown on the display. The optical call-up sensor/button (de-pending on the model) allows the values to be examined. The load profile depthfor the output via data interfaces is configurable. It can be coupled with up to fourreadout lists so that the scope of data selected can fit various requirements. Be-yond that there is the possibility to choose particular periods in the load profile to be read out. This is done using formatted commands.

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4.7. Tariff time switch

The tariff time switch is integrated into the meter. It is based on a quartz-controlled, battery or capacitor-buffered real time clock which provides time in-formation (date, day of week, time) in second intervals.Switching times can be configured for the customer using:

• 16 season tables,• 16 day types or• 384 holiday definitions for any weekdays

These are compared continuously with the real time clock. When they coincidewith the switching times configured or switching periods, then the switching func-tion commences. Switching functions are the activation of the power and energyregister. As a result of this 30 energy registers and 30 power registers with amaximum of 4 tariffs are configurable via the tariff switching clock. At the begin-ning of the summer period an hour can be added on to the tariff switching clock(MEZ). The beginning and end of the summer period is determined with the helpof a summer time register. The summer time register is settable in order to be ableto react to possible changes of the current valid summer time regulation.The accuracy of the real time clock amounts to 5ppm. The buffering of the RealTime Clock (RTC) is done by a SuperCap-capacitor with a running reserve of > 10d. With a completely discharged SuperCap the charge time is approx. 18minafter connection of the meter to the voltage lines (90% voltage). Instead of a Su-perCap- capacitor a battery (dry Li-battery) with a running reserve of > 20 yearscan be ordered. The latter is recommended for meters with load profile memoriesso that they are correctly treated when there are longer power interruptions or themeter has been turned off for longer periods. The real time clock can be operatedsynchronized with the network. That means it is cyclically synchronized using atime counter in the meter which derives its time from the line frequency. It canhowever also be synchronized via the following variations.

• Crystal lead internal clock

• Synchronisation of the internal clock through an impulse at the input contact.Synchronisation takes place at the next measuring period ending.

• Synchronisation of the internal clock through an impulse at the input contact.Synchronisation takes place at a fixed time of the day. This point of time is setthrough the parameter HHMMSS.

• Synchronisation of the internal clock through an impulse at the input contact.Synchronisation takes place at the next full 1 minute.

• Synchronisation of the appliances clock through a DCF-77 receiver connectedat the impulse.

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4.8. Ripple control receiver (RCR)

The ripple control receiver supports the following protocols/telegrams, which canbe configured via the data interfaces (D0, RS232, RS485, CL0):

ABB Ricontic bABB Ricontic sL&G Semagyr 50aL&G Semagyr 50bL&G Semagyr 52L&G Semagyr 56RWESauterSchlumberger Pulsadis ISchlumberger Pulsadis IIEdFCDCSiemens TELENERGZellweger ZAG 60Zellweger ZAG 180DecabitZPA

An advantage of the system is that it is possible to configure the RCR by modemand to call up status information such as relay status and the last telegram re-ceived. The RCR has 6 outputs which are available for the control function of themeter. In addition, the tariff and maximum demand control, early warnings and re-settings can be transmitted directly from the terminals over the optical fibre inter-face.

4.9. Data interfaces

The data exchange between meters and read out devices is performed either byan optical interface (D0) or through auxiliary terminals by means of the electricalinterface (RS232, RS485 or CL0). The transmission rate is fixed between 300 and9600 baud or can be set in mode C.

4.9.1. Optical interface D0

IEC 62056-21 describes the mechanical, optical and electrical attributes of theoptical communication head and the fixing point on the meter.

LZQJ-PHB-E-12

4.9.2. Electrical interface RS485

The electrical interface RS485 (galvanically de-coupled) is found at the two addi-tional terminals (A and B) under the sealable terminal cover. This is a symmetrical two-wire-interface and is designed in accord. with TIA/EIA-485/ ITU-T V.11. The distance between the read-out device and the meter may notexceed 1000 m.

RS485balanced two-wire-interface, half duplex

No. of connected meters up to 32

Max. cable length up to 1000 m

Data transmission rate 300 ... 9600 baud

Signal accord. to TIA/EIA-485 /ITU-T V.11

logical “1”-0.3 V to –6 V

logical “0”+0.3 V to + 6 V

Table 7: RS485-interface

RS485 Bus

Up to 32 devices can be operated by one RS485 Bus. In this bus system the firstand last device must be terminated with a terminating resistor between wire „A”and „B” in order to eliminate conduction reflections.

Bus structure:

D

Device 1 Device 2 Device 32

27

© 2004 EMH Elektrizitätszähler GmbH & Co KG

etail:

Please note!The terminating resistor may be in-stalled only with the first and last device.

see detail see detail

BABA BA

. . .

RS485 2-wire bus

RS485

23 24

A B

RTERM= 120Ω

Connectingterminals

28


4.9.3. Electrical interface RS232

The electrical interface RS232 (galvanically de-coupled) is found at the three addi-tional terminals (RxD, TxD and GnD) under the sealable terminal cover.This RS232 is a symmetrical two-wire-interface and is designed in accord. withITU-T V.24 and ITU-T V.28. The distance between the read-out device and themeter may not exceed 15 m.

RS232balanced two-wire-interface

No. of connected meters 1

Max. cable length up to 15 m

Data transmission rate 300 ... 9600 baud

Signal accord. to ITU-T V.28 logical “1”- 3 V to - 15 V

logical “0”+ 3 V to + 15 V

Table 8: RS232-interface

4.9.4. Electrical interface CL0 (CS)

The electrical interface CL0 (galvanically de-coupled) is found at the additionalterminal under the sealable terminal cover. The CL0-interface conforms with DIN 66 348, Part 1. It is a passive two-wire inter-face, i.e. possesses no own power source. Data is transmitted as mark/space at anominal current of 20mA. For that reason, it is also called a 20mA current inter-face. The voltage drop of the series-switched transmitters and receivers in themeter is about 4V. Thus a maximum of four meter outputs can be switched in se-ries and operated by one modem. The meters can be addressed and can there-fore be called up specifically. The CL0 interface can be used for data transmissionup to one kilometre.

CL0 (DIN 66 348, Part 1),20mA two-wire-interface

Signal one zeroTransmitter ≥ 11mA ≤ 2.5mAReceiver ≥ 9 mA ≤ 3mA

Permissible voltage dropTransmitter max. 4VReceiver max. 4V

Maximum valueCurrent 24mA (short circuit)Voltage 27V (open circuit)

Table 9: CL0-interface

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4.10. Inputs and Outputs

4.10.1. Inputs

7 control inputs with systems voltage (potential free),optionally one of these as S0 input (not potential-free), max 27 V DC, 27 mA (active)

4.10.2. Outputs

For an output contact a S0 output according to DIN 43 864, relay (max 2) or asemiconductor relay (MOSFET-output) is available. The MOSFET-Specificationcan be a make contact or an opener.

S0 Output: Pulse duration 20-500ms (25-1Hz) in 20ms steps;Energy impulse 100-10.000 Imp/kWh;max 27 V DC, 27 mA (passive)

Relay: max 250V AC/DC, 100 mA

Opto-MOSFET: max 250V AC/DC, 100 mA

4.10.3. Optical fibre interface LLS

An especially innovative option to the classical outputs is EMH’s transmissionprotocol for an optical fibre interface. EMH has put this concept into an optical fi-bre isolating relay box (see Figure 7).On one of the meter terminals is a coupling point where an optical fibre contactcan be established by simply plugging in and screwing down. An optical fibreisolating relay with up to six outputs is plugged onto the other end of the opticalfibre cable. The relay box is in EN 50 022 DIN-rail housing. It has its own optical fi-bre output so that altogether four relay boxes can be cascaded. Thus a total of 24 control outputs can be created.The data from the meter to the optical fibre isolating relay is transmitted at 4800baud. Each optical fibre isolating relay output can be designed with a relay (withoptional suppresser circuit) or Opto-MOSFET technology as a make or breakcontact. A wide-area power unit from 100V to 230V serves as the power supplyfor the optical fibre isolating relay. A complex input suppresser circuit protects thedevice from destruction due to impure power supply. Optimal isolation is obtainedby means of the galvanic separation of the optical fibre from the meter and relayboxes described here. Since contact and relocation of the optical fibre cable is notcomplicated, this variant offers substantial savings in installation costs. The opticalfibre cable makes it possible to link the meter and the relay box over a distance of20 metres and with a cascading relay of up to 50 metres.

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Figure 7: Optical fibre isolation relay box

4.11. Instrument software

Diverse configurable variables have been programmed which define the meter’sfunctions. These include

• settable variables• parameterable variables

The parameterable variables include those which define the meter’s attributes. Settable variables can be changed by combination of optical call-up sensor/resetsensor or call-up button/reset button (depending on the model) via the D0, RS232,RS485, CL0 in accordance with IEC 62 056-21. Parameterable variables can onlybe changed via the optical interface D0- or electrical interface (RS232, RS485,CL0). To do this the meter must be in the parametering status (by using the pa-rameter key). This is located on the printed circuit board inside the meter. Themeter cover must be removed in order to press this key. The signalizing ofparametering status is indicated by blinking of the communication symbol on thedisplay. The parametering status is ended either by

• 24 hour uninterrupted meter operation• the command „switch off parameterization status“.

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5. Meter operation

5.1. Operating and display

For the operation of the devices a menu is used for the information which is to bedisplayed. For the operation of this, the basics are as follows:

Call-up sensor/button*:

• „short” operation (toperation< 2 s) switches over to the next value in the list ormenu option

• „long” operation (2 s ≤ toperation < 5 s) activates either the menu option whichwas just represented or causes the pre-values to be skipped over

• „longest” operation (toperation ≥ 5 s) takes you back from each operation condi-tion back to the operation mode (scrolling display)

Reset sensor/button*:

A „short” pressing in the set mode initiates the activation of the first digit of theselected value and switches through the lists.A „long” pressing always initiates a resetting, apart from in the set mode and inthe display test.

* Depending on the model also designed as an optical sensor or mechanical push button.

32


5.1.1. Principle mode of actions of the operation and display

Figure 8: Depiction of the changing of the display modes

Operating display(scrolling)

Display test

Call-up modeMenu [A]- button

Activate [A]-sensor/button short or long

Call-up modeMenu [R]- button

Activate [R]-sensor/button short or long


33


Figure 9: Depiction of the call-up: menu A-button

Call-up modeStandard

Activate [A]-sensor/button long

Call-up modeCertification relevant

logbook

Call-up modeMenu [A]- button

DisplayMenu option"Std-dAtA"

DisplayMenu option

"P.99"

Display endof the list "End"


Activate [A]-sensor/button short



DisplayMenu option

"P.01"


Call-up modeLoad profile


34


Figure 10: Depiction of the single call-up

Call-up modeStandard

Find the first value fromthe standard data list

Display value/historical value


Switch over to thenext value/

historical value

Switch over to thenext value, skipsa historical value


Lastvalue?

no

yes

no

"End"


35


Figure 11: Depiction of the load profile call-up

Call-up modeLoad profile

Find date of theyoungest daily block

Display date




Find data of the firstregistration period of the

selcted date

Display data of theregistration period

Switch over to the nextregistration period


Switch over to dateof the last day

36


Figure 12: Depiction of the call-up: Calibration relevant logbook

Call-up modeCertification relevant logbook

Find date of theyoungest entry

Display date


Display dateof the entry

Switch over tothe next entry

Last valueof the entry?

Last entry

"End"

no

yes

ja

no

37


Figure 13: Depiction of the call-up: menu R-button

Set mode

Avtivate A]-sensor/button long

Test mode

Call-up modeMenu [R]- button

DisplayMenu option

"SEt"

DisplayMenu option

"tESt"

Display end of the list "End"

[A]-Sensor/Taste kurz

Avtivate A]-sensor/button short



DisplayMenu option"InFO-dAtA"

Avtivate A]-sensor/button shortInfo mode

Avtivate A]-sensor/button long

38


Figure 14: Depiction of the set mode

Set mode

Find the first valueof the set mode

Display the valueto be set


First digit flashes

Display value withflashing digit

Switch over to the next value



Last Digit?

All digits flash

PlausibilityOK?


Save new value?

Maintain old value

Increase digit by 1 Next digit flashes


no

yes


Display endof the list "End"

Last value?

yes

no


39


Figure 15: Depiction of the info list

Call-up modeInfo

Find the first value fromthe info list

Display value/historical value


Switch over to thenext value/

historical value

Switch over to thenext value, skipsa historical value


Lastvalue?

no

yes

no

"End"


40


Figure 16: Depiction of the test mode

Test mode

Find the first valueof the test data list

Display test value


Switch over to thenext test value

41


5.1.2. Display and control

For the display of the data/values there are the following different operationmodes:

• Operation display mode • Display test • Call-up mode „menu call-up button“

• Call-up mode standard („Std-dAtA“ display of all the register contents in thelist)

• Call-up mode load profile („P.01“ display of load profile values)• Call-up mode calibration relevant logbook („P.99” Display of the changes of

the output impulse constants and the LED-impulse constants)• Call-up mode „Menu reset button“

• Set mode („SEt“ editing of settable variables)• Call-up mode info („InFO-dAtA” shortened display of the billing data)• High resolution mode for testing purposes („tESt“ test mode).

Furthermore the following principles apply:

The control of the display and the editing of settable values takes place by meansof „one-handed operation“, that means several operating elements do not have tobe operated simultaneously. The initial state of the display is the operation dis-play. A change-over from the operation display to the „menu [A]- button” (thatmeans call-up mode standard or call-up mode load profile) or to the „menu option[R]- button” (that means set mode or test mode) is only possible via the „display-test”. The return from call-up-, load-, set-, info- or test mode into the operationdisplay occurs automatically when no operating element was activated or whenthe call-up sensor/button has been activated for longer than 5s within the fixedtime of 2 measuring period lengths (in general 30 minutes, apart from in the testmode where this takes place first after 24 hours). The end of a list is marked in thedisplay with „End” in the value area.

For the call-up sensor/button the following applies:

In the call-up mode „Menu“:• Switch over to the next value in the list (operation < 2 s)• Selection of the value in the list (operation ≥ 2 s)

In the call-up mode „Standard“/„Info“:• Switch over to the next value/pre-value (operation < 2 s)• Skipping of the displayed pre-values (operation ≥ 2s).

In the call up mode „Load profile”:• Switch over to the next day block (operation < 2s)• Selection of the displayed day block (operation ≥ 2s)

and in the day block:• Switch over to the next available registering period (operation < 2s)• Return to the previous selected day block (operation ≥ 2s).

In the call up mode „Calibration relevant logbook”:• Switch over to the next entry/value (operation < 2s)

42


In the „Set mode":the displayed conduct as with the Figure 14 applies.

In the „Test mode“:• Switch over to the next test value (operation < 2 s)• Skipping of the displayed pre-values (operation ≥ 2s).

Since values can also be edited in the set mode via the data interfaces, the inter-face(s) and operational element are mutually interlocked (logically).

The sequence of the represented values (operation display and call-up mode)takes place following the allocation of the OBIS code. As a criteria for the order,the OBIS code is read from left to right starting from the left with the variable „Er-ror“ (OBIS code „F.F“), to which the other measuring variables are linked, sortedaccording to their OBIS codes in an increasing sequence.Deviating from this, the display of pre-values always occurs in the sequence fromthe newest to the oldest value.

5.1.2.1. Operation display

The operation display is the standard display. Here the data is displayed at inter-vals of 10 seconds one after the other (scrolling).

Operation display: List (Example)

OBIS Description

x.4.x Current time in the MP / current average value of the power

x.6.x Maximum of the power

x.8.x Energy

Table 10: Operation display (Example)

5.1.2.2. Display test

Through operating the call-up sensor/button (Operation < 5 s ) the operation dis-play is switched over to the display test (see Figure 8) and all activated seg-ments/sections of the display are shown.

After this you can switch:

• through operating the call-up sensor/button in the call-up mode „Menu A-button“ or

• through operating the reset sensor/button in the call up mode „Menu R-button”

43


5.1.2.3. Call-up mode Menu A-button

The first displayed option in the menu list is the menu option single call-up „Std-dAtA“ (see Figure 9). Every further short operation of the call-up sensor/buttonleads to the display of further possible existing menu options, e.g. the load „P.01“.For the purpose of the selection of the menu options the call-up sensor/button ispressed at least two times. The last display in the call-up list is the list end-marking „End” shown in the value area of the display. If the time limit of twomeasuring periods (or rather 2 RP-lengths, in case no MP is present; in general 30min) is reached after the last pressing of the button or if the call-up sensor/buttonis activated for at least 5 sec’s then it is automatically switched back to the opera-tion display.

5.1.2.4. Call-up mode standard (Menu option „Std-dAtA”)

The first displayed option of the menu option „Std-dAtA” is the code and the con-tent of the error code. Every further operation of the call-up sensor/button leads tothe display of further data. For the purpose of a faster data call-up the pre-valuescan be skipped and the pre-value of the following value displayed. This isachieved by operating the call-up sensor/button „long” (Figure 10). If the time limitof 2 measuring period lengths (or rather 2 RP-Lengths in case no MP exists, ingeneral 30 min) is reached after the last press of the button or if the call-up sen-sor/button is activated for at least 5 seconds then the operation display is auto-matically switched back. With this it is guaranteed that the course of a completemeasuring period of the meter can be observed without any interruptions. The lastdisplay in the call-up list is the list end-marking, „End” shown in the value area ofthe display.

5.1.2.5. Call-up mode load profile (Menu option „P.01”)

Date selection of the day block

The first displayed value of the menu option „P.01” is the date of the newest avail-able day block in the load profile. Every further short operating of the call-up sen-sor/button leads to the chronological display of the load profiles from the previ-ously available day (see Figure 11). If the call-up sensor/button is activated „long”then for the exact selection of the day block which is to be selected the registeringperiod is shown in an increasing order. If the time limit of 2 registration periods isreached after the last press of the button or if the call-up sensor/button is acti-vated for at least 5 seconds then the operation display is automatically switchedback into the operation display. The last display in the call-up list is the list end-marking „End” shown in the value area of the display and appears in the displayafter the oldest available date of a day block.

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Load profile values of the selected day

The display of the selected day block begins with the representation of oldest loadprofile value saved on this day (the values saved at 0.00 o’clock are assigned tothe previous day) beginning with the lowest read OBIS code from left to right.Every further short operation of the call-up sensor/button displays the next avail-able measured value from the same recording period. When all the availablemeasured values of the period have been displayed the data from the followingavailable registration period follows (see Figure 11). The last option in the call-uplist is the list end-marking, („End”) showed in the value area of the display andwhich appears after the last profile value from the selected day. If the call-up sen-sor/button is activated for at least 2 seconds then it is switched back to the datelist from the previously selected day block.If the time limit of 2 registration periods is reached after the last press of the buttonor if the call up sensor/button is activated for at least 5 sec’s then it is automati-cally switched over to the operation display.

5.1.2.6. Call-up mode, certification relevant logbook (Menu option „P.99“)

In the certification relevant logbook 46 entries can be saved. When 46 entries havebeen reached then the oldest entry is then overwritten. The first displayed value ofthe certification relevant logbook is the date of the entry. Every further operation ofthe call-up sensor/button leads to the display of further data (see Figure 14 in thefollowing sequence: time, status entry, OBIS-code, (0.3.0 for changing the LED-constants, 0.3.3 for changing the output impulse constants for active power and0.3.4 for changing the output impulse constants for reactive power). After, the oldvalue of the changed constant appears and then the new value. If in the certifica-tion relevant logbook further entries exist then, with a further pressing of the call-up sensor/button the next log book entry is shown.

Status entry when deleting all entries: 2000

If the time limit of 2 measuring period lengths is reached after the last press of thebutton (e.g. 2 RP-Lengths, in case there is no MP; in general 30 min) or if the callup button is pressed for at least 5 s then the operational display is automaticallyswitched back. This way it is guaranteed that on the device at least one uninter-rupted run of a complete measuring period can be observed. The last value in thecertification relevant logbook is the list end code which is marked as „End” in thedisplay.

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5.1.2.7. Call-up mode menu R-button

For operating the R-button the seal of the button, or rather the slide must be bro-ken. This may only be carried out by authorized personnal.

The first displayed value of the menu list is the menu option set mode with thename „SEt“ (see Figure 13). Every further operation of the call-up sensor/buttonleads to the display of further existing menu options, e.g. the high resolution modefor testing purposes with the name „tESt“. For the purpose of the selection of themenu option the call-up sensor/button is activated for at least 2 sec’s. The lastdisplay in the call-up list is the list end-marking, „End” shown in the value area ofthe display. If the time limit of 2 registration periods is reached after the last pressof the button or if the call-up sensor/button is activated for at least 5 sec’s then itis automatically switched back to the operation display.

5.1.2.8. Set mode (menu option „SEt“)

In the set mode, settable values are entered or changed via one of the reset sen-sor/button and/or call-up sensor/button as well as via one of the data interfaces.There is a mutual interlocking of the different set possibilities. To set the values viaone of the data interfaces, formatted commands in accordance with IEC 62056-21 are used. Values with several digits which can be edited via the sensors/ but-tons are edited with the sensors/buttons starting from the left (first) digit.

Important information for setting the date and clock:When setting the clock you must first set the date and then the time. Otherwise itcan be the case, that with the transition from summer to winter time (and the re-verse) the clock time will be shifted by ± 1 hour.

5.1.2.9. Call-up mode info (Menu option „InFO-dAtA”)

The info list is a shortened display of the billing data for the manual data read-out.Every further operation of the call-up sensor/button leads to the display of furtherdata. For the purpose of a faster data call-up the pre-values can be skipped andthe pre-value of the following value displayed. This is achieved by operating thecall-up sensor/button „long” (siehe Figure 15). If the time limit of 2 measuring pe-riod lengths (or rather 2 RP-Lengths in case no MP exists, in general 30 min) isreached after the last press of the button or if the call-up sensor/button is acti-vated for at least 5 seconds then the operation display is automatically switchedback. With this it is guaranteed that the course of a complete measuring period ofthe meter can be observed without any interruptions. The last display in the call-uplist is the list end-marking, „End” shown in the value area of the display.

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5.1.2.10. Test mode (Menu option „tESt”)

In the high resolution mode „tESt“ for test purposes the same data appears in thedisplay as in the operation display however this does not scroll and also with thedifference that the energy register(s) is displayed in high resolution. Every opera-tion of the call-up sensor/button leads to the display of further data (see Figure16). If the call-up sensor/button is activated for at least 5 seconds then it auto-matically switches over into the operation display. The test mode can also be acti-vated and deactivated via the data interfaces. The test mode is deactivated pro-vided that the initialisation telegram (see for this ZVEI-Empfehlung „Prüfung elek-tronischer Zähler über die Datenschnittstelle = ZVEI-recommendation „testing ofelectronic meters via the data interface“) is sent with the measuring period defaultvia the data interfaces or when a time period of 24 hours elapses since the activa-tion of the mode.

5.1.2.11. Parameter mode

The meter can only be altered in the calibration mode (certification seal broken)via the data interfaces. If the meter is in the parameter mode, then this state isspecially marked on the display.

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6. Circuit diagrams (examples)

In the following you find some circuit diagrams as examples. With the connectionof a meter is very important to note the relevant circuit diagram which can befound on the meters terminal cover and also in the delivery documents.

6.1. Transformer-operated meter for three phase four-wire systems

for connection to the current and voltage transformers

3x58/100V 1(6)A, 5A, 1A3x63/110V 1(6)A, 5A, 1A

Example of one design variant with:

1 input S04 outputs Opto-MOSFETelectrical data interface RS232optical interface LLS

for connection to a current transformer

3x220/380V 1(6)A, 5A, 1A3x230/400V 1(6)A, 5A, 1A

Example of one design variant with:


1 2 3 4 5 6 7 8 9

u

X

X

U

X

U

X

U

u

X

u

k

K

L1L2L3N

K K

k kl

L L L

l lX

E9522

OUTPUTS

HR: MOSFET (max. 250V AC/DC; 100mA)

LLS: optical fibre interface

INPUT

S0in

1 2 3 4 5 6 7 8 9

E9512

k k

K K

L1L2L3N

K

kl l

L L L

l

OUTPUTS



INPUT

S0in

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6.2. Transformer-operated meter for three phase three-wire systems

for connection to current and voltage transformers

3x100V 1(6)A, 5A, 1A3x110V 1(6)A, 5A, 1A

Example of a design variant with:


6.3. Three phase meter for direct connection in four-wire systems

Example of a design variant with:

electrical data interface RS232optical interface LLS

3x220/380V 10(60)A3x230/400V 10(60)A3x230/400V 10(100)A

1 2 3 4 5 6 7 8 9

E8522

u

X

x

U

x

U

x

U

u

X

u

k

K

L1L2L3

K

kl

L L

lX

OUTPUTS



INPUT

S0in

E9502

OUTPUTS

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7. Housing

Dimensions according to DIN 43 857, Part 2 for measuring transformer metersand three-phase current meters for direct connection.

The housing consists of the following components:

7.1. Base plate

Base plate is made of grey polycarbonate with upper hanging eye-hooks andlower hanging eye-hooks.

7.2. Meter cover

The display window is transparent and the remaining cover surface has an erodedstructure. The meter cover is hung at the top of the base plate and fastened at thebottom with two sealing screws. The contact for the readout head is found in thetransparent part of the cover window. A recessed magnetic ring guarantees error-free coupling between the meter and the readout head. On the front side oftransformer meters there is a device for the fixing of a sealable transformer label.

Figure 17: Dimensions

7.3. Terminal block for transformer-operated meter

Bore diameter

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current and voltage terminals 4.6 mmauxiliary terminals 3.0 mm

7.4. Terminal block for direct connection 60A

Bore diametercurrent terminals 6.5 mmvoltage terminal and auxiliary terminals 3.2 mm

7.5. Terminal block for direct connection 100A

Bore diametercurrent terminals 9.5 mm

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voltage terminals (4.5 x 4.5) mmauxiliary terminals 3.2 mm

Tips for the cable diameter:

Bore diameter of the terminals Suitable for cable diameter up to(incl. connector sleeve):

9.5 mm 70 mm²6.5 mm 33 mm²4.6 mm 16 mm²3.2 mm 7 mm²3.0 mm 7 mm²

Table 11: Cable diameter

8. Ordering code

Please contact EMH‘s local representative or EMH directly.

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9. Software tools

For the following software tools the PC should fulfil at least the following require-ments:

Processor: Intel Pentium, 100 MHz or higherRAM: 32 MB RAMAvailable hard disk memory: 10 MB for each programOperating system: Microsoft Windows 95/98/2000, NT4.0 or XPScreen resolution: optimal 800x600 Pixel with 65.000 coloursAccessories: Optical communication head OKK with DSub9-

connector (RS232) for connection to the D0-interface or RS232, RS485, CL0 for communicationwith the meter

9.1. EMH-COMBI-MASTER 2000

The meter communication program EMH-COMBI-MASTER 2000 is a PC programfor communication between a PC and meters from the series LZQJ from EMHElektrizitätszähler GmbH & Co KG. The most important functions of the programare:

• Readout of meter data (table 1, table 2, service table, load profile, logbook)• Graphic load profile display• Load profile export• Transmission of parameterization- and set files (option)• Remote meter readout (option)• Set clock (option)

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9.2. COMBI-TOOL

The operational and user interface COMBI-TOOL enables the more advanceduser of EMH Electricity meters to configure and read out meters from the seriesLZQJ.

Actions to the following topics can be carried out:

• Meter identification• Interface settings• Reset /Pre-value formation • Time control• Tariff configuration (seasons, holidays, tariff)• Ripple control qualities• Display- and read out lists• Data read out

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9.3. TRANSFORMER-TOOL

The software TRANSFORMER-TOOL is used for the parameterization of trans-former meters from the series LZQJ from EMH Elektrizitätszähler GmbH & CoKG. Communication with the meter takes place via a serial interface in accor-dance with IEC 62056-21(former IEC 1107) mode C. A fixed baud rate is alsosupported.

The most important functions of the program are:

• Configuration of meter parameters: U-transformer, I-transformer, impulse du-ration, impulse constants, units and digits left/right of the decimal point

• Plausibility test

• Meter configuration online: read out, parameterization, delete energy registers,switch off PAR-Status

• Creation and printing of transformer labels

lzqj manual

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