IGW support-type current transformers for indoor use | ELEQ
IGW support-type current transformers for indoor use
Special designs -so versatile
To cope with several different primary currents, a joice of primary Switch Over or secondary intermediate topping is available.
IGW support-type current transformers for indoor use are employed for measurement and protection purposes in busbar systems of 24kV medium voltage switch-gear with rated primary currents up to 3000A,
Safety by design
The support-type current transformers of the IGW series ore encapsulated in a cast-resin housing and potted with polyurethane inside the housingI.e. the primary winding and the secondary core-and-coil assembly ore embedded in a single operation, thus guaranteeing optimum insulation resistance. The secondary coreondoit assembly consists of a maximum of three soft magnetic, highly permeable tape-wound toroidal cores, each core being uniformly wound.
The output terminals consist of an M5 terminal pair. One screw of each terminal can be used for direct earthing to the base plate. An M8 earthing terminal is located on the back of the transformer housing.
The output terminals are protected against accidental contact by a sealable transparent cover in self-extinguishing polycarbonate. For versions with more than six terminals an additional covered terminal block is attached to the bock of the housing.
During the final inspection the transformers are subjected to a routine test in accordance with the relevant national and international standards such as VDE, IEC BS, ANSI etc..
Installation - no problems, no maintenance
The principal dimensions of the IGW12CI and IGW24D2 models satisfy DIN 42600 Pari 8.
Each mode! requires no maintenance and can be mounted in any position. Caution: if current transformers are operated open-circuited on the secondary side, extremely high voltages can be generated with resultant damage to equipment and personnel!
General tethnical data
|Rated primary current||5….3000A|
|Rated secondary current||1A, 5A|
|Rated frequency||50Hz, 60Hz|
|Rated burden||Acc. to customers requirement|
|Accuracy class||Acc. to customers requirement|
|Reted insulation level||Max. 24/50/125kV|
|Reted short-time thermal current||Max. 1000 x IN, max 120kA|
|Dynamic short time current||2,5 x ITh|
|Alitude of installation above sea level||1000 m n.p.m.|
|Type||L||B||H||a||b||d||x||Rated insulation level||Primary terminals|
|C1||340||148||220||270||125||12||190||17,5kV||A B D|
|D1||360||148||220||290||125||12||190||17,5kV||A B D|
|E1||410||148||220||340||125||12||190||17,5kV||A B D|
|F1||460||148||220||390||125||12||190||17,5kV||A B D|
|C21||340||184||220||270||155||14||190||17,5kV||A B C D|
|D12||355||178||280||280||150||14||195||24kV||A B D|
|B2||310||178||280||230||150||14||190||24kV||A B C D|
|D2||355||178||280||280||150||14||205||24kV||A B C D|
|E2||410||178||280||335||150||14||195||24kV||A B C D|
|H32||375||208||280||300||180||14||215||24kV||A B C D|
|E3||405||208||300||330||180||14||195/215||24kV||A B C D|
|E4||405||248||390||330||218||14||195||24kV||A B C D|