French utility RTE - approved current transformers

These Current Transformers have been designed and developed in close collaboration with RTE, the French Electricity Network, to match the most stringent requirements of outdoor substations.

- Their « window type » design makes it possible to install them under Extra High Voltage (EHV) environment taking advantage of the insulation of primary (cable, GIS busducts, wall bushing, …)

- The CT’s with ref ATOA, ATOX, ATOY for outgoing differential protection are equipped with a filter capacitor to limit the high frequency voltage peaks showing during connect/disconnect cycles, or in case of fault on the network, and of a voltage limiter protecting CT against overvoltage in case of secondary open circuit.

These Current Transformers have been designed and developed in close collaboration with RTE, the French Electricity Transmission Network, to match the most stringent requirements of outdoor substations.

- Their « window type » design makes it possible to install them under Extra High Voltage (EHV) environment taking advantage of the insulation of primary (cable, GIS busducts, wall bushing, …)

- They can also be equipped with a filter capacitor to limit the high frequency voltage peaks showing during connect/disconnect cycles, or in case of fault on the network.

- CT’s of 1A secondary for outgoing line protection are equipped with a voltage limiter protecting CT against overvoltage in case of secondary open circuit.