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Overvoltage (Each Phase). The fault lamp illuminates red, the alarm horn sounds, and the unit shuts down when the voltage
exceeds the overvoltage setting for the preset time delay period. The local display shows Volts (L1- L2, L2- L3, or L3- L1) High
Shutdwn. See Figure 142 for overvoltage specifications.
Note:
Overvoltage can damage sensitive equipment in less than one second. Install separate overvoltage protection on online
equipment requiring faster than 2-second shutdown.
Overvoltage Setting Range
Overvoltage Default Setting
Figure 14 Overvoltage Specs
Run Relay Overload. The fault lamp illuminates red, the alarm horn sounds, and the unit shuts down when the controller smart
switch that operates generator set wire number 70 (Run) is overloaded. The local display shows Run Relay Overload.
Underfrequency. The fault lamp illuminates red, the alarm horn sounds, and the unit shuts down when the frequency drops
below the underfrequency setting. The local display shows Frequency Low Shutdwn. See Figure 15 for underfrequency
specifications.
Underfrequency Default Setting
Figure 15 Underfrequency Specs
Note:
The long-term shutdown occurs if the frequency is 1 Hz or more below the system frequency for 60 sec. The long-term shutdown
is not adjustable.
Undervoltage. The fault lamp illuminates red, the alarm horn sounds, and the unit shuts down when the voltage drops below
the undervoltage setting for the time delay period. The local display shows Volts (L1- L2, L2- L3, or L3- L1) Low Shutdwn. See
Figure 16 for undervoltage specifications
Undervoltage Setting Range
Undervoltage Default Setting
80% of nominal at 10 sec.
Figure 16 Undervoltage Specs
(Voltage) Regulator Communications Loss. The fault lamp illuminates red, the alarm horn sounds, and the unit shuts down
when the voltage regulator to controller communication link is disrupted. The local display shows RegCommLos Shutdwn.
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