Most power distribution networks have their neutral earthed to support important currents whenever a fault happens.
In order to avoid the damages and disturbances such faults can provoke, a resistor is fitted between the neutral and the earth to limit this current and to give electrical protection devices enough time to react.
Various and modular range :
Our experience acquired through the design and supply of thousands of METAL DEPLOYE resistors all over the world, the flexibility of our technology and the robustness of our products allow us to meet the more various requirements. We can design any tailor-made solution.
The range of resistors already manufactured :
- Electrical criteria :
Rated fault current : from 5 to more than 5000 A.
Rated voltage : from 0.38 to 500 kV.
Rated time : from 1 sec. to continuous time rating.
- Mecanical criteria :
Direct connection or through top or side mounted bushing.
Protection degree of housing : from IP00 to IP54 (we recommend IP23)
Finishing : hot dip galvanized, painted, stainless steel housing or other if required by customer.
- Options :
Current transformer HV or LV.,
ON or OFF load disconnecting switches,
Space heater,
Elevating stands,
Bushing cable boxes.
To meet the client requirements, we have designed and supplied disconnecting and change over switch cabinets including disconnectors and current transformers for direct earthing or earthing through the Neutral Earthing Resistor.
