CT/PT
Medium voltage indoor voltage transformer TJP are casted in epoxy resin, equipped with special fuse designed for insulation voltages up to 36 kV (38,5 kV).
A single phase voltage transformer which is intended to have one end of its primary winding directly earthed. The transformers are equipped with a special fuse.
The transformers are designed and manufactured in conformity with the following standards and recommendations: IEC, VDE, ANSI, BS, GOST and CSN, others on request.
Product scope
- TJP 4.x are designed for insulation voltages from 3.6 kV to 12 kV.
- TJP 5.x are designed for insulation voltages from 12 kV to 17.5 kV.
- TJP 6.x are designed for insulation voltages from 17.5 kV to 24 (25) kV.
- TJP 7.x are designed for insulation voltages up to 36 (38.5) kV.
Key benefits
- Ready for tariff metering
- Better performance thanks to extended burdens for each accuracy class
- Can be mounted in any position
- Over voltage factor 1.9xUn/8h as a standard
- Fuse holder can be mounted in two possible direction: in the same way as secondary terminal, or an opposite way
- The wide range of supported standards, including IEC 61869, allows a huge number of modifications on the individual request of each customer
- Better performance thanks to extended burdens for each accuracy class - TJPH types
Key features
- Primary voltage 3000/√3 - 35000/√3 V
- For measuring and protection with up to 3 secondary windings
- Reconnectable versions available
- DIN dimensions available
- Primary contacts can be equipped with different connectors (cable – primary screw, busbar – spring thumb)
- Can be supplied with or without fuse, it is depending on customer requirement
Indoor current transformer cable KOLA
Current transformers type KOLA Indoor dry type, cast resin insulated are designed for rated voltages up to 0.72 kV.
Medium voltage current transformers cable type KOLA are suitable for the measurement of the sum of three-phase currents in a 3-phase cable.
Under normal operating conditions this sum is zero. In the event of an earth-fault the sum of the currents is equal to the earth-faul current and a corresponding current flows in the secondary.
These transformers are used together with static earth-fault relays. The cable current transformers can generally be used when measuring the residual current e.g. to prewarn of, or locate an earth-fault. An uninsulated busbar or low voltage cable serves as the primary conductor.
Product scope
Highest voltage for equipment............ 0.72 kV
Primary current................................... max. 1 250 A
Key benefits
- Can be mounted around existing cables thanks to split core
- Instalation without disconecting the cable
- Ready to be used together with earth-fault protection relay
- Easy mounting by base plate
Key features
- For rated primary currents of up to 1250 A (higher values on demand)
- For measuring of the sum of the three phase current
- Ring or rectangular types
- Openable type (split core)
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