self-contained current transformers 7.2 kv - 420 kv
TRANSCRIPT
SVENSKA KRAFTNÄT S W E D I S H N A T I O N A L G R I D
U N I T , B U S I N E S S A R EA O U R R E F E R E N C E
APS TR01-04E
D A T E
2014-11-05 &> any A10 NK, AS, NB, AN C O N S U L T A T I O N S
TECHNICAL GUIDELINE
R E V I S I O N A P P R O V E D
4 Td
SELF-CONTAINED CURRENT TRANSFORMERS 7.2 kV - 420 kV
INTRODUCTION This English text is to be regarded as a translation of the Swedish guideline edition. The Swedish text and the interpretation thereof shall govern the contract and the legal relations between parties.
These guidelines are mainly based on Swedish Standard SS-EN 61869-1 and SS-EN 61869-2. The guidelines specify alternatives in the case of several options in the standards, and also include additions and clarifications to the standards. The guidelines can be made binding conditions for the procurement by the Purchaser, and will in such case together with the applicable standards form specification of the requirements. In this situation the documents will be valid for design and testing of current transform-ers at rated voltages 7.2 - 420 kV.
These guidelines are not applicable for bushing current transformers in power trans-formers, and not for electronic current transformers.
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Revision Notes Change notes Date
B Revision 2006-09-25
3 New template. Collaboration with Vattenfall removed. Thermal short time current 31.5 kA and dynamic short time current 80 kA have been removed. Max. values for Rct have been introduced Current ratio 4000/2 A have been introduced Table with creepage distances have been updated, all creepage distances for both ceramic and non-ceramic insulators are now identi-cal.
2013-02-25
4 New standard SS-EN 61869. Other standards updated. Extended burden range for measurement core changed. Rct for rating 4000/2 added. Appendix 2 test method removed. Formulas for n and ALF removed.
2014-11-05
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Content
1 General ....................................................................................................................... 5
1.1 Applicable standards ................................................................................... 5
1.2 Ambient temperature .................................................................................. 6
1.3 Wind .............................................................................................................. 6
2 Ratings ....................................................................................................................... 7
2.1 Rated insulation level .................................................................................. 7
2.2 Rated frequency. .......................................................................................... 7
2.3 Rated primary current ............................................................................... 8
2.4 Rated secondary current ............................................................................ 8
2.5 Inter-ratio connection ................................................................................ 8
2.6 Continuous load current ............................................................................. 8
2.7 Thermal and dynamic short-time current ................................................. 9
2.8 Cores and windings ..................................................................................... 9
2.8.1 General ........................................................................................... 9
2.8.2 Measuring cores ............................................................................ 9
2.8.3 Relay cores ................................................................................... 10
2.8.4 No-load impedance instrument security factor and
accuracy limit factor ................................................................... 10
2.8.5 Capacitive terminals (only for Um from 82.5 kV to 420 kV) ... 10
2.8.6 Turns correction (only for Um from 7.2 kV to 52 kV) .............. 11
3 Design ...................................................................................................................... 11
3.1 General ....................................................................................................... 11
3.2 Gas insulated current transformers ......................................................... 12
3.3 Mechanical strength .................................................................................. 12
3.4 Primary terminals ..................................................................................... 12
3.4.1 Design .......................................................................................... 12
3.4.2 Mechanical stress ........................................................................ 13
3.5 Secondary terminals .................................................................................. 13
3.5.1 Terminal box for secondary terminals ...................................... 13
3.5.2 Capacitive terminal (only for Um from 82.5 kV to 420 kV) ...... 14
3.5.3 Contact components .................................................................... 14
3.5.4 Earthing clamps .......................................................................... 14
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3.5.5 Clamp design ............................................................................... 14
3.5.6 Secondary damping .................................................................... 14
3.6 Marking ...................................................................................................... 14
3.6.1 Rating plates................................................................................ 14
3.6.2 Constants n and Rct .................................................................... 14
3.6.3 Circuit-diagram plate ................................................................. 14
3.6.4 Plate design .................................................................................. 14
3.7 Insulators ................................................................................................... 15
4 Testing ..................................................................................................................... 16
4.1 Type tests .................................................................................................... 16
4.1.1 No-load curve and winding resistances .................................... 16
4.1.2 Insulator test ............................................................................... 16
4.2 Routine test ................................................................................................. 17
4.2.1 Tan δ test ...................................................................................... 17
4.2.2 No-load curve, instrument security factor ................................ 17
4.2.3 Capacitive terminal tests (only for Um from 82.5 kV to 420
kV) ................................................................................................ 17
4.2.4 Insulator test ............................................................................... 17
4.3 Test certificates .......................................................................................... 17
4.3.1 Type-test certificates ................................................................... 17
4.3.2 Routine-test certificates .............................................................. 17
5 Documentation ........................................................................................................ 18
5.1 General ....................................................................................................... 18
5.2 Tender documentation .............................................................................. 18
5.3 Documentation together with apparatus delivery .................................. 18
5.4 Documentation and spares after delivery ............................................... 19
6 Delivery .................................................................................................................... 19
7 Appendix ................................................................................................................. 20
7.1 Appendix 1. Terminal plates and bolts, dimensions. ........................... 20
7.2 Appendix 2. Component Data List ............................................................ 21
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1 General
1.1 Applicable standards Applicable Swedish Standards are valid. When there is no Swedish Standard, Europe-
an Standard (EN) and IEC Publication shall apply. The latest edition shall apply.
Where current transformers offered do not in every way fulfil the stipulated standards
and the additions of the guidelines, deviations shall be specified.
Applicable standards and guidelines:
SS-EN 61869-1:2013 Mättransformatorer – Del 1: Allmänna fodringar
SS-EN 61869-2:2013 Mättransformatorer – Del 2: Tilläggsfodringar för
strömtransformatorer
IEC 60071-1:2006 Insulation coordination
IEC 60273:1990 Isolatorer – Stödisolatorer för ställverk med system
spänning över 1000 V – Mått och tekniska data
SS-EN 60529:2000 Kapslingsklasser för elektrisk materiel (IP-beteckning).
SS-EN ISO 1461:2009 Varmförzinkade beläggningar på tillverkade järn- och
stålföremål – Specifikationer och provningsmetoder.
SS 421 01 67:2001 Dimensionering av utomhusställverk – Vind- och
islaster.
SS-EN 60059:2010 IEC standard current ratings
IEC 60296:2012 Fluids for electrotechnical applications – unused
mineral insulating oils for transformers and switchgear
SS-EN 62155:2003 “Ceramic insulators”
IEC/TS 60815-2 Guide for the selection of insulators in respect of
polluted conditions.-part 2 ceramic insulators.
IEC/TS 60815-3 Guide for the selection of insulators in respect of
polluted conditions.-part 3 polymer insulators.
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SS-EN 61462:2008 Composite insulators – Hollow insulators for use in
outdoor and indoor electrical equipment
SS-EN 50052 C1:2008 Gjutna aluminiumkapslingar för gasisolerade
metalkapslade högspänningsställverk.
SS-EN 50064 T1, C1:2008 Gasisolerade metallkapslade ställverk – Kapslingar av
plastiskt bearbetat aluminium.
SS-EN 50068 C1:2008 Gasisolerade metallkapslade ställverk – Kapslingar av
smitt stål.
SS-EN 50069 C1:2008 Gasisolerade metallkapslade ställverk – Svetsade
kapslingar sammansatta av gjutet och plastiskt
bearbetat aluminium.
1.2 Ambient temperature It shall be informed at which conditions the current transformer shall be installed on
site and which temperature interval is applicable. The following temperature limits
shall apply for different applications:
Application Lower limit Upper limit
Degrees Celsius
For indoor installation - 25 + 40
Outdoor, with solid and liquid
insulation - 50 + 40
Outdoor, with gas insulation,
north of Dalälven - 50 + 40
Outdoor, with gas insulation,
south of Dalälven - 40 + 40
1.3 Wind For normal applications the wind pressure 700 Pa against a plane surface shall apply.
This corresponds to a wind velocity of 34 m/s. For equipment in exposed locations, e.g.
coastal or mountain areas, a higher wind pressure might be necessary. Design shall in
such case be done with a wind pressure in accordance with SS 421 01 67.
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2 Ratings
2.1 Rated insulation level The following values of insulation level shall be used:
Highest voltage for
equipment
Um
kV (r.m.s.)
Rated lightning
impulse withstand
voltage
kV (peak)
Rated switching
impulse withstand
voltage
kV (peak)
Rated 1 min power
frequency withstand
voltage
kV (r.m.s)
7.2 Current transformers designed for Um = 12 kV
shall be used
12 75 - 28
24 125 - 50
36 170 - 70
52 250 - 95
82.5 380 - 150
145 650 - 275
170 650 - 275
245 950 - 395
420 1425 1050 -
2.2 Rated frequency The rated frequency shall be 50 Hz.
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2.3 Rated primary current It shall be possible to connect current transformers at the secondary winding for rated
currents according to one of the pairs in the following table:
50 – 100 A*)
75 – 150 A
150 – 300 A
300 – 600 A
500 – 1000 A
1000 – 2000 A
1500 – 3000 A**)
2000 – 4000 A**)
*) not for voltages ≥ 82.5 kV
**) measuring cores have normally only the lower current, but loadable to 200% .
2.4 Rated secondary current Current transformers shall normally have a rated secondary current of 1 A, or for
measuring purpose 5 A at smaller substations below 52 kV. In some cases 2 A, in line
with old standard, may be specified.
At a rated primary current of 4000 A the rated secondary current shall always be 2 A.
2.5 Inter-ratio connection Changeover from one ratio to another may only be carried out secondarily for voltages
≥ 52 kV. However, all other demands (e.g. concerning rated burden) must be satisfied,
even for the most unfavourable alternative.
2.6 Continuous load current The rated continuous thermal current for the current transformer shall be the same as
the higher of the rated primary currents.
For voltages ≥ 82.5 kV, extended current rating for measuring transformers shall be
specified for the lower primary current value according to Clause 5.6.201.5 in SS-EN
61869-2, up to 200% of the rated current. The measuring core shall have a fixed con-
nection at the low rated winding. The measuring core shall on request be inter-ratio
connectable as the relay cores.
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For rated current 3000 A, 3150 A as common standard rated current for components
shall apply as continuous thermal current.
2.7 Thermal and dynamic short time current Current transformers shall be designed to withstand thermal and dynamic short-time
currents according to one of the following pairs of current:
For highest voltage for equipment, Um, from 7.2 kV up to 52 kV:
Thermal short-time current during 1 s,
kA (r.m.s.)
Dynamic short-time current,
kA (peak)
100 times primary rated current,
maximum 31.5 kA (r.m.s.)
Peak value = 2.5 x thermal short-time
current during 1 s
For highest voltage for equipment, Um, from 82.5 kV up to 420 kV:
Thermal short-time current during 1 s,
kA (r.m.s.)
Dynamic short-time current,
kA (peak)
40 100
2.8 Cores and windings
2.8.1 General
Current transformers shall be designed with one measuring core and four relay cores.
Each core shall be provided with its particular secondary winding, which shall be elec-
trically completely separated from other windings.
2.8.2 Measuring cores
Measuring cores shall at least fulfil the following requirements:
Rated burden according to Class 0.2 S
VA Rated overcurrent figure, FS
15 <10
The accuracy class shall be kept from 1 VA to 15 VA.
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2.8.3 Relay cores
Relay cores shall fulfil the following requirements:
Rated burden according to
Class 5P30
VA
*) Class 10P30
VA
30 30
*) Only for voltages below 245 kV
2.8.4 No-load impedance instrument security factor and accuracy limit factor
The secondary winding resistance Rct shall be given at 75 °C winding temperature.
Maximum values for Rct are specified in the table below:
Current ratio Max Rct [Ω]
4000/2 9
3000/1 12
2000/1 9
1000/1 5
100, 150, 300, 600/1 5
In addition to SS-EN 61869-2, Clause 5.6.201 and 5.6.202.2.1 the actual instrument
security factor shall be calculated.
2.8.5 Capacitive terminals (only for Um from 82.5 kV to 420 kV)
If nothing else is specified, the current transformers shall be provided with capacitive
voltage terminals for phase synchronizing, relay protection, check of insulation, and
metering data. At Um /√3 and short-circuit between voltage terminal and earth, a
short-circuit current of at least 8 mA should be obtained.
For transformers for a highest rated voltage of 82.5 kV, in exceptional cases a lower
value for this current can be accepted, although not less than 4 mA. The real short-
circuit current shall be stated.
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Any inner load impedance in current transformers between the terminal and earth
shall be purely capacitive, and designed to obtain a no-load voltage of at least 250 V at
Um /√3.
If the transformers are provided with overvoltage protection between the terminal and
earth, this must not have a lower spark over and extinction voltage than 350 V and 250
V respectively. There is no requirement to equip the current transformers with load
impedance or overvoltage protection.
2.8.6 Turns correction (only for Um from 7.2 kV to 52 kV)
Winding turns correction can be accepted if it has no significant pre-magnetizing in-
fluence.
3 Design
3.1 General Current transformers shall be equipped, if possible, with solid insulation. Alternatively
they may have liquid or gas insulation, depending on different environmental de-
mands. The quantity of liquid or gas shall in that case be as small as possible, prefera-
bly less than 200 kg liquid.
3.1.1
All parts exposed to corrosion shall be made of non-corrosive material, or be hot-dip
galvanized according to SS-EN ISO 1461.
3.1.2
Current transformers shall be hermetically sealed if applicable.
3.1.3
Liquid-insulated current transformers shall be equipped with an easily readable liquid
level indicator.
3.1.4
The metallic lower part of the current transformer shall be provided with at least two
earthing clamps for up to 120 mm2 copper conductor.
3.1.5
Current transformers for a highest voltage for equipment of 245 kV or 420 kV shall be
possible to transport in horizontal position.
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3.1.6
Liquid-filled current transformers shall be completely free from PCB.
3.2 Gas insulated current transformers Gas filled current transformers shall preferable have pure SF6 without other gas mix-
tures. If a gas mixture is chosen N2 but not CF4 for environmental reason is accepted.
A gas leakage of maximum 0.5 % is accepted. Gas filled current transformers shall be
monitored by a density relay with a closing contact functioning at two levels (filling,
blocking). The density shall also be indicated on pointer type instrument.
3.3 Mechanical strength Current transformers shall be designed to withstand the mechanical stresses, which
may occur as a result of forces on the primary terminal in accordance with Clause
3.4.2.
3.4 Primary terminals
3.4.1 Design
The supplier shall denote the material of the terminals. The terminals may consist of a
plate or a bolt. If the connection plates have a thickness of less than the required
thickness “e” from Appendix 1 the suitability of the plates shall be verified through a
temperature-rise test. Any additional parts added to the H.V. terminals to fulfil the
required dimensions should be avoided. Dimensions of terminals are shown in Appen-
dix 1.
Terminals of copper or copper alloy shall be tin-plated with a layer of minimum 50
μm, or alternatively silver-plated, with a layer of minimum 20 μm. A copper alloy sen-
sitive to stress corrosion shall not be used.
Terminals made of aluminum or aluminum alloy shall not be surface treated. An alu-
minum alloy sensitive to stress corrosion, layer corrosion or intercrystalline corrosion
shall not be used. Terminal plate of aluminum or aluminum alloy shall have a hardness
of HB minimum 75.
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Terminal plates are selected on the basis of rated current for the transformer as fol-
lows:
Rated current of primary winding,
A
Size,
mm
≤ 300 2 – 40 *)
>300 ≤1000 4 – 75
>1000 ≤2000 9 – 125
>2000 ≤4000 12 – 165
*) Only for unit with highest voltage for equipment ≤ 52 kV
Terminal bolts are selected on the basis of rated current for the transformer as follows:
Rated current of current transformer,
A
Size,
mm
Bolt of aluminum Bolt of copper
≤ 1000 ≤ 1000 30
– ≤ 2000 40
≤ 2000 ≤ 4000 60
3.4.2 Mechanical stress
Current transformers shall fulfil the demands for Class I according to SS-EN 61869-1,
Table 7.
3.5 Secondary terminals
3.5.1 Terminal box for secondary terminals
The terminal box shall be spacious and allow the connection of necessary connecting
leads to be carried out comfortably.
The terminal box shall be semi-enclosed and spray-tight (Protection class minimum IP
54 according to SS-EN 60529) and be provided with rain-protected, net-covered
breather holes. Box-cover gaskets shall be resistant to solar radiation, air, oil and wa-
ter.
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3.5.2 Capacitive terminal (only for Um from 82.5 kV to 420 kV)
The capacitive terminal shall be connected to a separate part in the secondary terminal
box, which is provided with protection against contact or connection. The capacitive
terminal can alternatively be connected to a separate box.
3.5.3 Contact components
All contact components, even screws, shall be made of non-corrosive metal.
3.5.4 Earthing clamps
The terminal box shall be provided with a clamp for earthing of the secondary wind-
ings (regarding earthing of the base, see Clause 3.1.4).
3.5.5 Clamp design
Terminal clamps and earthing clamps shall be designed for connection of up to 6 mm2
stranded conductors, and be such that conductors can be connected without cable lugs
and without sustaining damage.
3.5.6 Secondary damping
Damping circuits, if existing, shall be designed in that way that the components are
available for impedance check.
3.6 Marking
3.6.1 Rating plates
The current transformer rating plate shall include data in accordance with SS-EN
61869-2. Total weight and serial number shall also be specified.
3.6.2 Constants n, ALF and Rct
Real (measured at routine test or type test) values of n and Rct shall be specified on the
rating plate. See paragraph 2.8.4 and 4.1.1.
3.6.3 Circuit-diagram plate
A lastingly legible circuit-diagram plate showing the transformer connection and ter-
minal markings shall be permanently fixed to the transformer near the terminal box.
The discriminating main data for each core shall be clear from the plate.
3.6.4 Plate design
The rating plates shall be made of anodised aluminium sheet or equivalent non-
corrosive material, and shall be fixed with non-corrosive screws. Deviations from this
may only be done after approval by the purchaser.
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3.7 Insulators Insulators shall be of composite for current transformers with a highest voltage Um of
245 and 420 kV. For current transformers with a highest voltage Um < 245kV compo-
site insulators are preferred. Composite insulators shall be designed and tested in ac-
cordance with applicable standards and SS-EN 61462. Ceramic insulators shall be
designed and tested in accordance with applicable standards and IEC/TS 60815-2.
For some exposed locations an increased creepage distance and the possibility for
insulator washing may be required. The possibility for washing shall then be specified
in the request for tender. Current transformers may be washable, washable with con-
strains or not washable. If the current transformer is washable with constrains the
constrains shall be specified in the tender.
In a normally polluted environment a creepage distance of Site Pollution Severity
(SPS) class b is required and for polluted environment class d is required. Increased
creepage distance is recommended in the west coast of Sweden (approximately 30 km
from the coast and in the valley of the river Göta älv up to the Lake Vänern.
If not other specified the same creepage distance shall be valid for composite and ce-
ramic insulators. The requirement is based on the figure below. For normal environ-
ment SPS class b is valid and for polluted environment class d, according to IEC/TS
60815-2 and IEC/TS 60815-3.
Creepage distance (unified specific creepage distance, USCD) as
function of pollution (SPS class)
The required creepage distances for insulators in normal and polluted environment are
specified in the table as follows:
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Rated voltage,
Um
kV
Minimum creepage distance, mm
ceramic/composit
Polluted environment
(klass d)
(klass d)1
Normal environment
(klass b)
(klass b)1 12 300 190
24 600 380
36 900 570
52 1300 830
82,5 2060 1320
145 3620 2320
170 4250 2720
245 6120 3920
420 10500 6720
4 Testing
If the test laboratory of the supplier complies with ISO 17025, the laboratory is consid-
ered to fulfil the accuracy demands. If not so, the supplier must show the documenta-
tion on test procedures and the traceability of the standards.
4.1 Type tests It shall be presented, that demands on tightness, insulation and accuracy are fulfilled
even at the lowest temperature.
4.1.1 No-load curve and winding resistances
A complete no-load curve shall be plotted in order to determine constant n and ALF
(see Clause 2.8.4) and to check the no-load impedance in accordance with Clause
2.8.3.
The secondary winding resistance shall be measured and constant Rct (see Clause
2.8.4) shall be specified at 75 °C winding temperature.
The instrument transformer security factor and accuracy limit factors shall be calculat-
ed and given according to Clause 2.8.4.
4.1.2 Insulator test
Insulators shall be tested according to applicable standards, and to SS-EN 61462
(composite) and IEC/TS 60815-2 (ceramic) respectively. See also Clause 3.7.
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4.2 Routine test
4.2.1 Tan δ test
The tan δ of the main insulation shall be measured at ambient temperature and at
different voltages: at 10 kVr.m.s. and also around Um/√3 and if possible up to full power
frequency voltage. The test is not intended for gas insulated transformers.
4.2.2 No-load curve, instrument security factor
For measuring cores a complete no-load curve shall be plotted in order to determine
the instrument security factor “n” (see Clause 2.8.4) and a check of no-load imped-
ance, Clause 2.8.3.
A check shall be performed if demands are met for the accuracy limit factors of relay
protection cores (Clauses 2.8.3 and 2.8.4).
4.2.3 Capacitive terminal tests (only for Um from 82.5 kV to
420 kV)
The voltage ratio and the capacitance of the capacitive terminal shall be measured:
> Tan δ shall be measured at 2 kVr.m.s..
> 1 min power frequency test shall be performed with 4 kVr.m.s..
4.2.4 Insulator test
Insulators shall be tested according to applicable standards and to SS-EN IEC 61462
(composite) and IEC/TS 60815-2 (ceramic) respectively. See also Clause 3.7.
4.3 Test certificates
4.3.1 Type-test certificates
If production has been moved to another plant, material has been changed, or if type-
test certificate is more than five years old, then the type-test certificate cannot be ac-
cepted unless special agreement.
4.3.2 Routine-test certificates
The routine test certificates shall include, in addition to the routine-test results, the
following information:
> Current transformer data.
> Constants “n”, “ALF” and Rct for all cores.
> Purchaser’s reference number.
> Serial number.
> Reference to dimension drawings.
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5 Documentation
5.1 General Instructions, dimension drawings and diagrams, handed over at delivery of the current
transformer, shall be in Swedish.
5.2 Tender documentation With the tender the following documents shall be provided:
> List of data, dimension drawings, electrical circuit and schematic diagrams, in-
structions for erection, operation and maintenance, type test certificates and also
other documents needed for the technical evaluation.
> Bases for evaluation of the need and costs for maintenance, such as:
The interval for condition control and other measures of maintenance and the
time necessary for these works.
Necessary spares, special tools and accessories and the costs for these.
> Environmental information as below (see also TR 13-01):
The interval for condition control and other measures of maintenance and the
time necessary for these works.
Information about the main content of the equipment (type of material in per-
centage of weight); information about the content of dangerous substances
(for example heavy metals, carcinogenic compounds and compounds hard to
biodegrade, xenobiotic substances)
Handling and treating of the equipment when it has served its time.
5.3 Documentation together with apparatus delivery In connection with the apparatus delivery the following documents shall be submitted
electronically and in one paper copy, if not otherwise agreed:
A list (current transformer chart) including:
> Purchasing and order number
> Manufacturer
> Type
> Serial number
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> Rated data
> Type test certificates
> Dimension drawings.
Verification (title and number) of the following documents that shall be delivered to-
gether with the list:
> General assembly drawings and drawing lists
> Instructions for transport, storing, erection, service, testing, condition monitoring
and adjustment
> List of other chemical products including gas
> List of products and protective information for all listed chemical products
> List of special tools and accessories for erection and maintenance
> List of equipment for testing and condition control
> List of spares
> Final dimension drawings
> Final circuit diagrams
> Routine test certificates
> Filled in Component data list according to Appendix 2
A complete compilation file shall be handled over to the buyer, latest when all ordered
current transformers are delivered. It shall include test certificates for all current
transformers of the delivery in accordance with paragraph 4.3.2.
5.4 Documentation and spares after delivery The manufacturer shall at request provide the purchaser with necessary service bulle-
tins and during at least ten years after delivery with for the maintenance necessary
spares. Improvements in design or instructions, which can be applied to the equip-
ment supplied, shall be notified to the buyer also after delivery, preferably in the form
of service bulletins.
6 Delivery
The delivery is not considered complete until entire test certificates and required doc-
umentation have been submitted to the purchaser and have been approved.
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7 Appendix
7.1 Appendix 1. Terminal plates and bolts, dimensions.
Bolt Length 125 mm : Diameter : 30, 40, 60 mm
Plate Figure Measure
(mm) :
a b c d e
2 - 75 1 2-hål 75 17,5 40 14 10
4 - 75 2 4-hål 75 17,5 40 14 15
9 - 125 3 9-hål 125 22,5 40 14 35
12 - 165 4 12-hål 125 22,5 40 14 35
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7.2 Appendix 2. Component Data List
Tabell 1
Apparatdatalista för strömtransformatorer
Svenska Kraftnät
Beskrivning Värde Enhet Noteringar
Allmänt
Station * Ifylls av ställverksbyggaren EX
Hagby, CT 65
Objekt id/Littera * Ifylls av ställverksbyggaren EX
CL6 S5-IT
Beskrivning * Strömtransformator
Lägsta omgivningstemp °C Ex -50
Inköpsnummer *
Leverantörens ordernummer *
Tillverkare *
Typbeteckning *
Tillverkningsnummer * nummer
Levererad * ååmm
Utförandeform *
Fristående/genomföring (trafo,
reaktor)
/kabelströmsgenomföring
Huvudkonstruktion * Utomhus/inomhus
Kontruktionsspänning kV EX 420kV
Märkström A
Märkkorttidsström, 1s kA
Stötström, dynamisk kA
Primär isolationsnivå till jord -
kort stöt
kV EX 1425
Primär isolationsnivå till jord -
lång stöt kV EX 1050
Primär isolationsnivå till jord -
50Hz 1 min
kV EX 395
Sekundär korttids växelsp.
lindn-lindn, lindn-jord kV EX 4
Spolbarhet * Ja/Nej/Begränsad
Minsta fasavstånd m
Vikt per fas kg
Norm, Riktlinje * EX TR1-04, rev4
TEKNISK RIKTLINJE 2014-11-05 TR01-04E rev.4
22/23
Standard * SS-EN 61869-1, SS-EN 61869-
2
Ombyggnadsdatum * ååmm
Senaste drifttagningsdatum * ååmm
Omkopplingsbar
(normalt sekundärt) EX sekundärt
Märkomsättning 1-Primär
märkström
A EX 2000
Märkomsättning 2-Primär
märkström A EX 4000
Inkopplad omsättning A EX 2000
Sammanställningsritning * Ritningsnummer
Måttskiss * Ritningsnummer
Montage och skötselanvisning * Ritningsnummer
Kretsschema * Ritningsnummer
Provningsnormal * Ritningsnummer
Isolermedium olja/gas/torr, spec nr
Mängd isolermedium kg
Kapacitivt uttag * Ja/Nej
Max statisk horisontell
anslutningskraft N EX 3000
Max statisk vertikal
anslutningskraft
N EX 3000
Apparatuttag, storlek EX 9-125 (platta), 60
(tapp)
Kapslingsklass anslutningslåda * IP54/55
Typ av isolator * porslin/komposit
Krypsträcka isolator mm
Ritningsnr strömtransformator *
Ritningsnr isolator
Kärnor
kärna 1 *
Märkbörda kärna 1 VA Ex 15
Utökad termiskt mätområde
omsättning 1 * Ex 200%
Märkomsättning 1-Sekundär
märkström
A Ex 1
Klass kärna 1 * EX 0,2 S
Överströmstal Fs kärna 1 *
TEKNISK RIKTLINJE 2014-11-05 TR01-04E rev.4
23/23
Konstanten RCT för kärna 1 ohm
kärna 2 *
Märkbörda kärna 2 VA
Märkomsättning 1-Sekundär
märkström
A Ex 1
Klass kärna 2 * EX 5P30
Överströmstal ALF kärna 2 *
Konstanten RCT för kärna 2 ohm
kärna 3 *
Märkbörda kärna 3 VA Ex 30
Märkomsättning 1-Sekundär
märkström
A Ex 1
Klass kärna 3 * EX 5P30
Överströmstal ALF kärna 3 *
Konstanten RCT för kärna 3 ohm
kärna 4 *
Märkbörda kärna 4 VA Ex 30
Märkomsättning 1-Sekundär
märkström
A Ex 1
Klass kärna 4 * EX 5P30
Överströmstal ALF kärna 4 *
Konstanten RCT för kärna 4 ohm
kärna 5 *
Märkbörda kärna 5 VA Ex 30
Märkomsättning 1-Sekundär
märkström
A Ex 1
Klass kärna 5 * EX 5P30
Överströmstal ALF kärna 5 *
Konstanten RCT för kärna 5 ohm