r07 metric relays - recon srl

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R07 DC metric relay data sheet

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R07 METRIC RELAYS

R07I R07R

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FEATURES OF ELECTRONIC RELAYS SERIES R07

PREMISE

Metric relays, designed for continuous control of DC electrical quantities, have two thresholds. Crossing the thresholds changes the status of the internal relay. Crossing the first threshold, whose value must be set first by means of the “ENERGISED” trimmer, changes the status of the internal relay. The second threshold is attached to the former by means of adjustable hysteresis and must be set second by means of the “RELEASES” trimmer; crossing this threshold restores the previous status of the internal relay. The above is to explain the interaction between the thresholds. Priority is given to the first or second threshold to the user's discretion.

The DC metric relays of the R07 series are divided into:

• R07I - instantaneous relays (changeover within 200 milliseconds); the internal relay is direct-acting, it energises when the monitored quantity exceeds the set threshold and it releases when the monitored quantity is below the set threshold;

• R07R - multipurpose time-delay relays (the delay can be set in 4 intervals, between 3 seconds and 10 hours); the internal relay can be direct-acting (it energises when the monitored quantity exceeds the set threshold and releases when the monitored quantity is below the set threshold) or inverse-acting (it releases when the monitored quantity exceeds the set threshold and energises when the monitored quantity is below the set threshold), with a delay that can be set on attraction or on release;

The metric relays of the R07 series can control DC voltage and current. The four available models are:

• R07IA instantaneous current relay (mV shunt) • R07IV instantaneous voltage relay (power supply voltage) • R07RA time-delay current relay (mV shunt) • R07RV time-delay voltage relay (power supply voltage)

The relays of the R07 series are coded as follows:

R07 X Y *** **** RELAYS SERIES I = INSTANTANEOUS R = TIME-DELAYED A = CURRENT V = VOLTAGE RELAY VOLTAGE value expressed in mV. current signal (RELAY VOLTAGE means power supply voltage)

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TECHNICAL FEATURES OF THE ELECTRONIC RELAYS SERIES R07

1. Self-powered from the same source of the quantity to be monitored; does not require separate power supply;

2. The R07I instantaneous relay and the R07R time-delay relay are mechanically and electrically interchangeable. Both relays are connected by means of a pluggable 9-pin terminal block.

3. The R07I instantaneous relay and the previous RM75 relay are mechanically and electrically interchangeable. R07I relays are equipped with a male 9-pin connector, but can also be connected to the 10-pin female terminal block on RM75 relays, previously installed without requiring cabling modifications.

The use of highly reliable components with low temperature drift ensures stable performance over time. DIMENSIONS The relays of the R07 series are equipped with a casing for DIN/OMEGA rail mount. The dimensions of the casing are shown in the figure. Connections must be made by means of the pluggable female 9-pin terminal block with 5.08 pitch (not supplied). Relays of the R07 series must be installed in full compliance with the standards in force and with all safety provisions. The relays must be arranged in such a way as to ensure natural ventilation. Relays with rated power supply voltage > 220V must have natural external ventilation; therefore, always leave enough space for a module towards the other equipment. The electrical data are shown in the respective data sheets.

Table 1 shows the colour combinations of LEDs H1 and H2 with which the standard power supply voltage of the R07 series and the single voltage ranges that ensure relay operation are coded.

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Note: LED H1, “POWER”, is located near terminal 1. LED H2, “RELAY”, is located near terminal 2. Table 1

R07R relays allow for 8 possible configurations, depending on Minimum and Maximum threshold, Direct or Inverse action, and delay on Attraction or on Release. (These configurations can be easily obtained through the appropriate jumpers) These configurations are identified below as follows:

• LDR: direct-acting, releases upon minimum threshold, delay on release; • HDR: direct-acting, energises upon maximum threshold, delay on release; • HDA: direct-acting, energises upon maximum threshold, delay on attraction; • LDA: direct-acting, releases upon minimum threshold, delay on attraction; • LIR: inverse-acting, energises upon minimum threshold, delay on release; • HIR: inverse-acting, releases upon maximum threshold, delay on release; • HIA: inverse-acting, releases upon maximum threshold, delay on attraction; • LIA: inverse-acting, energises upon minimum threshold, delay on attraction;

The related code complies with the following coding:

1 2 3 H High L Low

D Direct I Inverse

A Attraction R Release

1 Level of activation of the monitored quantity (eg, H Max threshold L Min threshold) 2 Relay action (D Energises upon crossing the threshold I Releases upon crossing the threshold) 3 Position of the delay (A delay on Attraction R delay on Release)

Voltage LED Voltage Range V H1 H2 V min. V max.

R07**012 12 green yellow 10 18 R07**024 24 red red 20 36 R07**048 48 yellow red 40 72 R07**110 110 green red 90 160 R07**220 220 red yellow 185 310 R07**300 300 red green 250 400 R07**420 420 yellow green 360 500

R07**spec. special yellow yellow

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R07I* DC INSTANTANEOUS METRIC RELAYS The R07IV and R07IA DC metric relays detect the presence of DC voltage or current and switch instantaneously when the monitored voltage or current cross the set threshold. Scope of application:

• Voltmetric relay for battery charging - mod. R07IV • Minimum or maximum DC voltage voltmetric relay - mod. R07IV • Minimum or maximum DC current voltmetric relay - mod. R07IA

R07IV (voltage threshold relay) The R07IV relay is self-powered from the same DC source that it has to monitor (battery or other source). When the value of the monitored voltage is below the set value, the internal relay is in release condition (relay not energised). When the value of the monitored voltage is above the set value, the internal relay is in changeover condition (relay energised). The attraction and release voltage thresholds can be set by means of two multiturn trimmers. R07IA (current threshold relay) The R07IA is self-powered from the DC source, whose output current it is monitoring. When the value of the monitored current is below the set value, the internal relay is in release condition (relay not energised). When the value of the monitored current is above the set value, the internal relay is in changeover condition (relay energised). The attraction and release current thresholds can be set by means of two multiturn trimmers. The power and signal negative references must be common and connected as shown in the figure. The current thresholds, expressed in mV (see electrical data), must be clearly indicated in the order. Besides coding the rated operating voltage, the two LEDs on the front of the casing indicate:

LED H1 “POWER” on = powered relay LED H2 “RELAY” on = energised relay

The R07I CALIBRATION describes the procedure to calibrate the relay according to requirements.

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Electrical data

• Power supply DC (self-powered) • R07IV rated voltage standard 24V, 48V, 110V, 220V

300V, 420V non-standard (non-standard voltage available upon request)

• R07IA rated voltage standard 24V, 48V, 110V, 220V 300V, 420V non-standard (non-standard voltage available upon request)

• R07IA rated current 2 mV-5 mV 8 mV-20 mV 30 mV-60 mV 100 mV-200 mV

• Allowable voltage fluctuation -20% - +50% for standard voltage See table 1 for non-standard rated voltage • Trimmer adjustment range -20% - +50% for standard quantities • Contact capacity (2 changeovers) 2 changeovers 1 A at 250Vac - 300Vdc • Maximum switching current 3 A • Contact/coil insulation 2 kV - 50 Hz • Operating temperature -10°C - +50°C • Delayed activation standard 200ms maximum • Consumption on release 0.5 W at 24V

2 W at 220V 4 W at 420V

• Consumption on attraction 1.2 W at 24V 3W at 220V 5 W at 420V

• Protection class IP21 • Cooling natural • UL94 flammability rating V0 • Connections pluggable 9-pin terminal block 5.08 mm pitch

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USING R07I ELECTRONIC RELAYS The R07I electronic relays are applied in the event that the crossing of the set threshold by the monitored quantity (whether above or below it) causes instantaneous changeover of the internal relay. R07IV (voltage) relays are normally used for the following applications:

• maximum voltage relay: this relay instantly warns that the voltage has exceeded the set threshold; this information can be used to manage the functions that must be activated or interrupted above a certain voltage value eg, battery charging voltage control or voltage control in utilities;

• minimum voltage relay: this relay instantly warns that the voltage has dropped below the set threshold; this information can be used to manage the functions that must be activated or interrupted below a certain voltage value eg, discharging battery voltage level control;

• voltage threshold relay: this relay energises instantaneously when the voltage exceeds the maximum threshold and releases instantaneously when the voltage drops below the minimum level (hysteresis). The status of the relay can be used to activate operations that depend on the value of the monitored voltage eg, to actuate a generator in a photovoltaic system that must be actuated whenever the voltage supplied by the solar panels is not enough.

R07IA (current) relays allow for the following applications:

• minimum current relay: this relay instantly warns that the current has dropped below the set threshold; this information can be used to manage the functions that must be activated or interrupted below a certain current value eg, controlling the battery charging current to switch to the maintenance phase according to amperometric criteria;

• maximum current relay: this relay instantly warns that the measured current exceeds the set threshold; this information can be used to manage functions that must be activated or interrupted above a certain current value eg, monitoring utility current absorption in order to activate selective or full disconnect;

• current threshold relay: this relay energises instantaneously when the current exceeds the maximum threshold and releases instantaneously when the current drops below the minimum level (hysteresis). The status of the relay can be used to activate operations that depend on the value of the monitored current eg, to activate a gas intake system in a battery room that must be activated whenever the charging current exceeds the maximum value and turned off when the current drops below the minimum value.

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R07R DC TIME-DELAY METRIC RELAY The R07RV e R07RA DC metric relays detect the presence of DC voltage or current and switch after a set digital delay when the monitored voltage or current cross the set threshold. Scope of application:

• Voltage relay for battery charging - mod. R07RV • Minimum or maximum DC voltage relay - mod. R07RV • Minimum or maximum DC current relay - mod. R07RA

R07RV (voltage threshold relay) The R07RV relay is self-powered from the same DC source that it has to monitor.

R07RA (current threshold relay) The R07RA is self-powered from the DC source, whose output current it is monitoring. The power and signal negative references must be common and connected as shown in the figure. The current thresholds, expressed in mV (see electrical data), must be clearly indicated in the order. Conditions that are common to R07RV and R07RA relays Upon crossing the set thresholds, the internal relay switches, with or without delay, and executes the eight functions described in the chapter: OPERATING PRINCIPLE The eight functions of the relay can be configured in four pairs combining four jumpers on the PC1 connector on the printed circuit.

As a standard, the relay is equipped with:

• LDR/HDR configuration • high level at approx. 130% of the signal, • low level at approx. 90% of the signal, • 5 sec delay.

The attraction and release voltage thresholds and the time delay can be set by means of three multiturn trimmers. Besides coding the rated operating voltage, the three LEDs on the front of the casing indicate:

LED H1 “POWER” on = power on LED H2 “RELAY” on = energised relay LED H3 “TIMER” blinking = delay timer activated

The R07R CALIBRATION describes the procedure to configure and calibrate the relay according to requirements.

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Technical data:

• Power supply DC (self-powered) • R07RV rated voltage standard 24V, 48V, 110V, 220V

300V, 420V non-standard (non-standard voltage available upon request)

• R07RA rated voltage standard 24V, 48V, 110V, 220V 300V, 420V non-standard (non-standard voltage available upon request)

• R07IA rated current 2 mV-5 mV 8 mV-20 mV 30 mV-60 mV 100 mV-200 mV

• Allowable voltage fluctuation -20% - +50% for standard voltage See table 1 for non-standard rated voltage • Trimmer adjustment range -20% - +50% for standard quantities • Contact capacity (2 changeovers) 1 A at 250Vac - 300Vdc • Maximum switching current 3 A • Contact/coil insulation 2.5 kV - 50 Hz • Operating temperature -10°C - +50°C • The delay can be calibrated by means of trimmers in four adjustment ranges that can be

set through two jumpers 2.5 sec-140 sec 10 sec-550 sec 80 sec-75 min 10 min-10 hours

• Consumption on release 0.5 W at 24V 2 W at 220V 4 W at 420V

• Consumption on attraction 1.2 W at 24V 3 W at 220V 5 W at 420V

• Protection class IP21 • Cooling natural • UL94 flammability rating V0 • Connections pluggable 9-pin terminal block 5.08 mm pitch

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OPERATING PRINCIPLE With reference to the indications in the premise, the Maximum and Minimum function is allocated to R07R multipurpose relays according to the following: Maximum relay (H): The relay switches when the monitored quantity exceeds the set threshold (priority threshold) and restores the condition below the other set threshold (Reset). Minimum Relay (L): The relay switches when the monitored quantity drops below the set threshold (priority threshold) and restores the condition when it exceeds the other set threshold (Reset). The internal relay can be direct- or inverse-acting, thereby ensuring great flexibility. This leads to the definition of the two thresholds (minimum and maximum) and also of two different operating configurations: DIRECT and INVERSE DIRECT (D) configuration The relay energises upon reaching the maximum threshold and releases upon reaching the minimum threshold. INVERSE (I) configuration The relay releases upon reaching the maximum threshold and energises upon reaching the minimum threshold. The 4 possible combinations between the types of relays (Maximum or Minimum) and the possible configurations (Direct and Inverse) are summarised as follows: Direct-acting H (HD):

• The relay energises when VMON > VMAX • The relay releases when VMON < VMIN

Inverse-acting H (HI):

• The relay releases when VMON > VMAX • The relay energises when VMON < VMIN

Direct-acting L (LD):

• The relay releases when VMON < VMIN • The relay energises when VMON > VMAX

Inverse-acting L (LI):

• The relay energises when VMON < VMIN • The relay releases when VMON > VMAX

Where VMON is the monitored quantity, VMAX and VMIN the Maximum and Minimum thresholds, respectively. (The same considerations apply to I instead of V)

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The application of delay on Attraction or on Release allows for 8 different configurations: Direct-acting H (HD) with delay on Attraction (A) - HDA:

• The relay energises WITH DELAY when VMON > VMAX • The relay releases when VMON < VMIN

Direct-acting H (HD) with delay on Release (A) - HDA:

• The relay energises when VMON > VMAX • The relay releases WITH DELAY when VMON < VMIN

Inverse-acting H (HI) with delay on Attraction (A) - HIA:

• The relay releases when VMON > VMAX • The relay energises WITH DELAY when VMON < VMIN

Inverse-acting H (HI) with delay on Release (A) - HIR:

• The relay releases WITH DELAY when VMON > VMAX • The relay energises when VMON < VMIN

Direct-acting L (HD) with delay on Attraction (A) - LDA:

• The relay releases when VMON < VMIN • The relay energises WITH DELAY when VMON > VMAX

Direct-acting L (HD) with delay on Release (A) - LDR:

• The relay releases WITH DELAY when VMON < VMIN • The relay energises when VMON > VMAX

Inverse-acting L (LI) with delay on Attraction (A) - LIA:

• The relay energises WITH DELAY when VMON < VMIN • The relay releases when VMON > VMAX

Inverse-acting L (LI) with delay on Release (A) - LIR:

• The relay energises when VMON < VMIN • The relay releases WITH DELAY when VMON > VMAX

Note: the HDA/LDA, HIR/LIR, HIA/LIA and HDR/LDR configuration pairs have similar behaviours but differ in the priority allocated to the threshold.

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Hardware requirements: FUNCTIONS PC1 jumper settings The eight functions can be obtained by setting the four jumpers on the PC1 connector as shown in table 2

C = CLOSE O = OPEN Table 2

RELAY DIRECT INVERSE PC1 HDA LDR LDA HDR HIA LIR LIA HIR

1 - 2 O C O C C O C O 1 - 3 C O C O O C O C 4 - 6 C O C O O C O C 5 - 6 O C O C C O C O 7 - 9 C O C O C O C O

9 - 10 O C O C O C O C 12 - 14 C O C O C O C O 13 - 14 O C O C O C O C

Hardware requirements: TIME-DELAY PC2 jumper settings The four time-delay intervals can be obtained by setting two jumpers on the PC2 connector as shown in table 3 The duration of the delay can be adjusted within 4 different intervals (ranges):

• 2.5 s-140 s; • 10 s-550 s; • 80 s-75 m; • 10 m-10 h;

The fine adjustment of the time in the chosen period is carried out by means of trimmer P3. The oscillator frequency value (inversely proportional to time) can be accesses from outside the casing. Table 3

RANGE INTERVAL JUMPERS CLOSED

K1 Kf t/g. trim.

1 2.5 s-140 s 1-2 5-6 1 128 9 s 2 10 s-550 s 1-3 4-6 4 512 37 s 3 80 s-75 m 1-3 5-6 32 4096 5 m 4 10 m-10 h 1-2 4-6 256 32768 39 m

The ends of the interval have a ± 110% tolerance. Table 3 shows the coefficients required to fine tune the time delay, whose use is described in detail in the booklet dedicated to R07R relay calibration.

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Position of the connectors and configuration of the test points for measuring the oscillator frequency.

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USING R07R ELECTRONIC RELAYS The R07R electronic relays are applied in the event that the crossing of the set threshold by the monitored quantity (whether above or below it) causes instantaneous changeover of the internal relay. The high configurability of the R07R electronic relay allows it to execute eight different functions by simply configuring it through jumpers. Below are some examples of possible applications for the various R07RV and R07RI electronic relay configurations. Some examples refer to configuration pairs with similar behaviour. R07RV The R07RV (voltage) relay, in its four configurations allow for the following applications:

• LDR/HDR: direct-acting internal relay for minimum or maximum voltage and time-delay on release (in this configuration, the delay is on the minimum threshold); it warns with delay that the voltage has dropped below the set value; this information is often used to allow for a delayed disconnect of the utilities; this delay prevents unwanted tripping; receptacle loads generate transient voltage sags; the delay avoids sending unnecessary signals causing unwanted and hazardous utility disconnection.

• HDA/LDA: direct-acting internal relay for minimum or maximum voltage and time-delay on attraction (in this configuration, the delay is on the maximum threshold); it warns with delay that the voltage has exceeded the set value; this information is often used to allow for the delayed disconnection of the DC power supply of the utilities; this delay prevents unwanted disconnection of the load power supply; the instantaneous opening of relevant utilities causes transient voltage sags; the delay, however, ensures continuous power supply to the utilities during electrical phenomena.

• LIR/HIR: inverse-acting internal relay for minimum or maximum voltage and time-delay on release (in this configuration, the delay is on the maximum threshold); it instantly warns that the voltage has dropped below the set value; this information can be used to manage functions and/or operations that depend on the value of the monitored voltage. For example, the load of the batteries in a PV system must be transferred to the solar panel when the voltage supplied by the latter is stably above a certain value; also, it must be transferred instantly to other energy sources when the voltage supplied by the panels drops below a minimum threshold.

• HIA/LIA: inverse-acting internal relay for minimum or maximum voltage and time-delay on attraction (in this configuration, the delay is on the minimum threshold); it instantly warns that the voltage has exceeded the set value; this information can be used to manage functions and/or operations that depend on the value of the monitored voltage. In an isolated system, whose only source of energy is an independent generator with buffer batteries, it is correct to activate the unit with a certain delay, only when the discharging battery voltage is below a safety threshold and to deactivate it instantly when the battery voltage reaches the end-of-charge value, with consequent improvement of the energy balance.

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R07RA

• LDR/HDR: direct-acting internal relay for minimum or maximum current and time-delay on release (in this configuration, the delay is on the minimum threshold); it warns with a delay that the current has dropped below the set value; this information can be used to manage functions below or above a certain current value; the delay prevents unwanted tripping. To maintain itself charged, the battery must always absorb low current values; any lack of absorption indicates a rectifier failure or a battery fault. This configuration with enough delay to prevent incorrect information during the charge level change is the ideal solution.

• HDA/LDA: direct-acting internal relay for minimum or maximum current and time-delay on attraction (in this configuration, the delay is on the maximum threshold); it warns with delay that the current has exceeded the set value; this information can be used to manage functions above a certain current value. If, for example, the charge maintenance current of an open vessel battery is permanently increasing, the intake system in the battery room must be activated.

• LIR/HIR: inverse-acting internal relay for minimum or maximum current and time-delay on release (in this configuration, the delay is on the maximum threshold); it instantly warns that the current has dropped below the set value; this information can be used to manage functions and/or operations that depend on the value of the monitored current. One example is the selective delayed disconnect of non-priority utilities in the presence of excessive current absorption and their reactivation upon the restoration of safety conditions.

• HIA/LIA: inverse-acting internal relay for minimum or maximum current and time-delay on attraction (in this configuration, the delay is on the minimum threshold); this information is used to manage functions and/or operations that depend on the value of the monitored current. One application example is the delayed activation of occasional loads which must occur solely in the event of reduced absorption of the priority utilities; their instantaneous deactivation occurs when the priority utilities return to normal conditions.

These are only a few examples on the possible applications of R07R relays. The combination of several relays in their various configurations and their contacts in OR AND XOR allow the creation of circuits for any requirement.

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r07 metric relays - recon srl

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