Hitachi Relion 670 Series Applications Manual page 165

1MRK511407-UUS Rev. N
HystAbsn: Absolute hysteresis set in % of VBase. The setting of this parameter is highly dependent of
the application. If the function is used as control for automatic switching of reactive compensation
devices the hysteresis must be set smaller than the voltage change after switching of the compensation
device.
Phasor measurement unit RES670
Application manual
If the Programmable inverse curve is chosen for operation and
based on the set values, no TRIP signal is issued. However, START signal is set and
maintained as long as the measured quantity for operation is above the set start level of step.
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Section 9
Voltage protection
Equation 86 does not satisfy
159