S&C 6800 Series User Manual

Switch Control Setup
an Inrush Restraint Numerical Multiplier setpoint (of 2x, 4x, etc.) and the elevated
Ground Fault Detection Current Level value exceeds the maximum-available ground
short-circuit current level, adjust the Ground Fault Duration Time Threshold and
Ground Fault Current Inrush Restraint Time setpoints to ensure the switch control
has enough time after the restraint time to detect a ground fault. The sum of both timers
plus the ground-fault detection time must be less than the breaker total clear time. If the
multiplier elevates the fault-current detection to greater than the maximum fault current
available at the switch location, this has the same effect as setting a time block. (Range:
50-999,950; Step: 50; Default: 100)
Figure 15. The coordination sheet for ground overcurrent and inrush.
S&C Instruction Sheet 1045-530 33

S&C 6800 Series Specifications

General

Brand	S&C
Model	6800 Series
Category	Controller
Language	English