Zorc Surge Suppressors
Product overview
High Frequency Transient Surge Suppressors
For protection of medium and low voltage motors and transformers
Every year huge losses are incurred by end-users because of insulation failures of medium voltage (3kV – 40kV) motors, and dry-type transformers. This can be caused by:
- Switching transients associated with vacuum and other switchgear resulting in expensive insulation failures of motors and dry-type transformers.
- Multiple pre-striking and re-striking (re-ignition) at the motor or transformer terminals.
ZORC Surge Suppressors is a unique high frequency transient over voltage surge suppressor for the protection of motors and transformers from steep wave-front, short rise-time, high magnitude, spikes, surges and other transient voltages, generated by switching, lightning and other sources.
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Characteristics
The protective characteristics of ZORC units:
- Eliminates inter-turn insulation failures
- Extends the life of machine insulation
- Provides comprehensive insulation co-ordination at all practical surge magnitudes and rise-times
- Conforms with both the CIGRë and IEEE motor impulse voltage withstand recommendations
- Halves the magnitude of steep wave-front surges impinging on the load terminals by providing a matched cable terminating impedance under transient conditions, thereby eliminating refraction of steep wave-front surges (i.e. eliminates voltage doubling effects).
- Eliminates multiple pre-striking and re-striking transients associated with vacuum and other switchgear, by eliminating reflections of the pre-strike and re-strike current wave-fronts, and thus preventing high frequency current zeros in the contact gap of the switch.
Applications
Installed in the following industries:
- Chemical
- Petrochemical
- Underground mining (gold, platinum, coal, other)
- Surface mining (coal, copper, uranium, iron ore, other)
- Metal beneficiation (steel, stainless steel, gold, platinum, copper and uranium refineries)
- Power generation (generators, power station auxiliaries)
- Pumping (water pumping stations, oil pipelines)
Applied
Specific applications on medium voltage motors, generators, and dry-type and oil immersed transformers include:-
- Fans
- Pumps
- Compressors
- Mills
- Crushers
- Refrigeration machines
- Motor-generator sets
- Mine winders
- Conveyors
- Underground and surface mini-substations and mobile substations
- Generators
- Power station auxiliaries
- Induction & arc furnaces
Benefits
Benefits provided by ZORC units :
- Saves money by eliminating production downtime incurred due to insulation failures of motors and dry-type transformers.
- Protects new motors and dry-type transformers throughout their service life.
- Extends the life of motor and dry-type transformer insulation if retrofitted to existing motors and dry-type transformers in service.
Features
ZORC Models to suit various voltages : 400V to 40kV.
ZORC units
- Available in single phase and three phase units. Single-phase versions are suitable for installing in phase segregated terminal enclosures.
Compact and easy to install
- Special compact versions that can be fitted within most motor/transformer terminal enclosures or switchgear panels.
You can view download the PDF by clicking on this icon :