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Issue 21

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Protecting power distribution systems with modified differential ground faults

In power distribution systems that rely on parallel energy inputs, or include multiple inputs that are switched in and out, it is critical to protect the system from ground faults. Rather than simply disconnecting the entire system, though, modified differential ground fault protection systems allow only the faulted equipment to be disconnected while the rest of the system remains operational.

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These design techniques of a standard main-tie-generator switchgear application can be applied across a wide variety of equipment and requirements.

 

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ABB Pilot Devices come in a modular or compact design. The offering includes NEMA ratings of 1, 3R, 4, 4X, 12, and 13 and IP66, IP67 and IP69K. 

 

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