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Power Resistors

Generator Neutral Grounding Resistors & Leads Cubicles

A factory-assembled cubicle housing the neutral grounding resistor together with the neutral connection leads, current transformer and, where required, a neutral disconnector for generator neutral earthing. It limits stator earth-fault current to protect the generator winding and provides a defined reference for neutral displacement and earth-fault protection. Supplied as a self-contained enclosure adjacent to the generator or step-up transformer in power plants and captive generation.

Voltage classMV 12–36 kV
RatingGenerator terminal voltage 6.6–15 kV; low-resistance grounding, earth-fault current 200–1000 A, 10 s; or high-resistance grounding via distribution transformer/loading resistor; ventilated cubicle IP42/IP54
Insulation / mediumAir
StandardsIEEE 32, IEC 60076-6, IEC 62271-200, IEC 60529

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