The ZORC is a unique high frequency transient surge suppressor intended for the protection of motors, transformers and generators against steep wave front, short rise times,large amplitudes, spikes, surges, other voltages transients and circuit switching.
Reduces costs by eliminating production downtime due to switch isolation failure
Protects motors, generators and transformers throughout their useful life
Eliminates multiple pre- and re-striking of no-load transients and associated with other equipment
Standard and intrinsically safe models available
Three phase and single phase
System voltage: 400 V to 40 kV
Transient protection: 0.1 to 0.2 microsecond interval
Special compact versions that can be installed in most motor/transformer terminal boxes or switchgear panels
Motor generator sets
Induction and arc furnaces
Mini and mobile substations
Power station auxiliaries
Dry type transformers
ZORC surge suppressors can be installed in any direction (including upside down) on the machine side of the associated medium voltage motor/generator/transformer switch, in the following positions (in order of priority of point of view of surge protection).
Preferred Connections of ZORC Surge Suppressors
In motor/generator/transformer terminal box, connected from each phase to ground
Wired to the motor/generator/transformer terminal box via a three-core cable (25mm minimum), in addition to an earth conductor (according to local regulations)
In line with the motor/generator/transformer power cable, the shunt is connected from each phase to ground
In the associated motor/generator/transformer switchgear panel, connected from each phase to ground
Convenient mounting brackets or flanges are provided
Overall mechanical dimensions – guide:
The ZORC surge suppressor is a unique voltage and frequency dependent hardwired termination network comprising capacitors, resistors and non-linear zinc oxide (ZnO) arresters.