ABB ELK-CT0 145 F Скачать руководство пользователя страница 4

4

CU R R E NT  TR A N S FOR M E R S  E LK- C T0 

I N S T R U C T I O N S  FO R  I N S TA L L AT I O N ,  USE  A N D  M A I N T EN A N C E

14) 

parameters of 1st core 

15) 

parameters of 2nd core 

16) 

parameters of 2nd core 

17) 

parameters of 3rd core 

18) 

parameters of 3rd core 

19) 

additional specification if required 

20) 

order number 

21) 

PTB marking (if required) 

22) 

length of sec. outlets (if required) 

3. Instructions for installation

General informations

Instrument transformer is electrical equipment 
and the electrical installation of the instrument 
transformer can be done by skilled personnel 
only. The level of experience, age and eligibility 
criteria for persons working with, on or near elec-
tric installations is governed by national legisla-
tion. If no asuch eligibility legislation is available 
the corresponding requirements can be found in 
EN 50110-1 standard. 

Safety instructions

1.  Always consider the transformer as a part of 

electric circuit which it is connected to. Don´t 
touch incoming connectors and terminals, or 
any other parts of the transformer, except you 
know for sure these are earthed. 

2.  Ground always the metallic base of the instru-

ment transformer. 

3.  Always connect one terminal of each secondary 

winding of the transformer to the earth. When 
the secondary of transformer is intercon-
nected, there should be only one grounded 
point to prevent accidental paralleling with sys-
tem grounding wire. 

4.  Always short-circuit the secondary of the cur-

rent transformer that is not currently in use, to 
prevent secondary voltages, which may be haz-
ardous to personnel or damaging to the trans-
former’s secondary. The secondary like this 
must be additionally grounded. 

Mounting

Transformers ELK-CT0 are designed as low-volt-
age current transformers 0.72/3kV, without built 
in primary conductor. Primary conductor is not in-
cluded in supply. 

Transformers ELK-CT0 are designed for mounting 
in gas-insulated switchgears type ELK-04. De-
pending on the protection concept they can be 

arranged in front or behind of the circuit break-
er’s interrupting unit. The primary sided insula-
tion is provided by SF

6

-gas. Up to a rated nominal 

current of 3 150 A current transformers are usu-
ally integrated into the flanges of the circuit 
breaker enclosure. Note, in case of a rated nomi-
nal current of 4 000 A a separate current trans-
former is required. All current transformers are 
casted on a support which is required to fix the 
current transformer in the enclosure. By that, the 
distance to the high voltage loaded conductors is 
guaranteed even in the case of a short circuit (and 
consequently high magnetic forces). The termi-
nals of the secondary windings are interfaced to 
the substation via a terminal box consisting of a 
multiple bushing disk and terminal blocks. Before 
installation of transformer into enclosure all sur-
faces have to be cleaned from dust, grease and 
other impurities, see 5. maintenance instructions. 

Connection of transformer primary side

The ELK-CT0 transformers don´t have their own 
primary conductor. If ELK-CT0 transformers will 
be used in other applications than ABB ELK-04 
Gas-Insulated Switchgear please contact us for 
support.

Connection of transformer secondary side

The transformers ELK-CT0 contains outlet cable 
with defined length for each type. Outlet cables 
are ended with cable lugs M6. If not specified oth-
erwise in the order, the cable cross-section may 
not exceed 6 mm

2

. The interface of the current 

transformer to the terminal box is handled with 
stranded wire connected to gas-to-air bushings 
with 60 pins (M6x12/15) to the outer environ-
ment. Depending on the number of wires either 
one or two gas-to-air bushings are available. The 
ends of the windings of all cores are correspond-
ingly identified.This identification may be 
changed by customer after agreement with man-
ufacturer.

Outlets designation


02


02  Example of outlets 
designation

Содержание ELK-CT0 145 F

Страница 1: ... PRODUCT FOR HIGH VOLTAGE APPLICATION Current transformers ELK CT0 Instructions for installation use and maintenance ...

Страница 2: ... Safety instructions 3 Mounting 3 Connection of transformer primary side 3 Connection of transformer secondary side 7 4 Instructions for use 7 Routine test report 7 5 Maintenance instructions before installation 7 6 Transport Storage 8 7 Disposal 8 8 Handling 9 9 Normative references 9 10 Dimensions 9 11 Lifetime 12 Repair 10 Appendix 1 Examples of electrical wiring 11 Appendix 2 Dimensional drawi...

Страница 3: ...insulation levels 8 rated short time thermal current duration 9 additional standard 10 rated continuous thermal current 11 rated dynamic current 12 ratio 13 parameters of 1st core terminal mark ing transformer ratio rated output bur den accuracy class extension 01 Example of current transformer rating plate Instructions for installation use and maintenance for current instrument transformers These...

Страница 4: ...T0 are designed for mounting in gas insulated switchgears type ELK 04 De pending on the protection concept they can be arranged in front or behind of the circuit break er s interrupting unit The primary sided insula tion is provided by SF6 gas Up to a rated nominal current of 3 150 A current transformers are usu ally integrated into the flanges of the circuit breaker enclosure Note in case of a ra...

Страница 5: ...e of charge theoretical current voltage error and phase dis placement values theoretical excitation magnetization curves Additional reports for supplementary charge made available on request test report on accuracy excitation magnetization curves additional nameplates if more than 1 is re quired verification tests for measuring cores classes 0 2 0 2S 0 5 0 5S 5 Maintenance instructions before inst...

Страница 6: ...ral principles of design EN 50110 1 Operation of electrical installa tions Current instrument transformers are designed tested and manufactured in accordance with in ternational or national standards the customer s requirements based on an agreement between the customer and the manufacturer The specific standard is always mentioned on the transformer ratio nameplate As an example the following sta...

Страница 7: ...7 Appendix 1 Examples of electrical wiring Current instrument transformers ...

Страница 8: ...ALL ATION USE AND MAINTENANCE Appendix 2 Dimensional drawings Weight of the transformer depends on the number of cores and their parameters ELK CT0 145 LG ELK CT0 145 F Drawing No 2RKA016357 Drawing No 2RKA016354A0001 VERSION A0001 A0002 L max mm 349 449 ...

Страница 9: ...CT0 170 L ELK CT0 735FG Drawing No 2RKA016361 Drawing No 2RKA016368 VERSION A0001 A0002 A0003 A0004 L max mm 343 353 443 493 Up to 60 outlets A 750mm for more than 60 outlets A 850mm only for A0003 and A0004 ...

Страница 10: ...10 CURRENT TR ANSFORMERS ELK CT0 INSTRUCTIONS FOR INSTALL ATION USE AND MAINTENANCE ELK CT0 170 F 735 F Drawing No 2RKA014943A0006 ...

Страница 11: ...11 ELK CT0 520 LK ELK CT0 520 LG Drawing No 2RKA014879A0001 Drawing No 2RKA014872 VERSION A0002 A0004 L max mm 344 445 ...

Страница 12: ...ORMERS ELK CT0 INSTRUCTIONS FOR INSTALL ATION USE AND MAINTENANCE ELK CT0 735 L ELK CT0 520 F Drawing No 2RKA014876 Drawing No 2RKA014881A0003 VERSION A0001 A0002 A0003 A0004 A0008 A0009 L max mm 193 493 353 343 443 153 ...

Страница 13: ...le lack of information in this document We reserve all rights in this document and in the subject matter and illustrations con tained therein Any reproduction disclosure to third parties or utilization of its contents in whole or in parts is forbidden without prior written consent of ABB Copyright 2019 ABB All rights reserved C O N TA C T U S ABB s r o EPDS Brno Videnska 117 619 00 Brno Czech Repu...

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