ABB Relion 670 Series Technical Reference Manual page 601

1MRK505222-UUS C
Technical reference manual
Function Range or value
Critical impulse time 10 ms typically at 0 to 2 x I
Impulse margin time 15 ms typically
Undercurrent:
Critical impulse time 10 ms typically at 2 to 0 x I
Impulse margin time 15 ms typically
Overvoltage:
Critical impulse time 10 ms typically at 0 to 2 x V
Impulse margin time 15 ms typically
Undervoltage:
Critical impulse time 10 ms typically at 2 to 0 x V
Impulse margin time 15 ms typically
Multipurpose protection
Accuracy
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Section 10
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