Description
Overview
Essential details:REG670 B30X00-B21H09-B1A2-E-B-KB-B-A4A5-E1AE1E1AA-D Generator protection
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REG670 B30X00-B21H09-B1A2-E-B-KB-B-A4A5-E1AE1E1AA-D Generator protection
Stator earth fault protection, both traditional 95% as well as 100% injection and 3rd harmonic based are included. When the injection based protection is used, 100% of the machine stator winding, including the star point, is protected under all operating modes. The 3rd harmonic based 100% stator earth fault protection uses 3rd harmonic differential voltage principle. Injection based 100% stator earth fault protection can operate even when machine is at standstill. Well proven algorithms for pole slip, underexcitation, rotor earth fault, negative sequence current protections, and so on, are included in the IED.
The generator differential protection in the REG670 adapted to operate correctly for generator applications where factors as long DC time constants and requirement on short trip time have been considered