Manual 37443A DSLC-2 - Digital Synchronizer and Load Control
Page 168/226 © Woodward
Reverse Power Relay Description
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Setting Reverse power trip (parameter 7507) in Menu 2 to “Enabled” selects relay “Load switch” (terminal 43) as
the reverse power trip output. The load switch will not operate based on the load switch PU and load switch DO
settings when the Reverse power trip (parameter 7507) is enabled. The time required to activate the load switch
output is calculated using the following formula:
Reverse Pwr Level (%kW) * Rev Pwr Time Delay
Time to trip = ------------------------------------------------------------------
Actual Load (%kW)
Example:
Reverse Power Trip (parameter 7507) = Enabled
Instant Reverse Power (parameter 4531) = –10 %
Rev Pwr Time Delay (parameter 4532) = 20 s
Reverse Power Level (parameter 4533)= –1 %
Actual Load = –4 %
–1 % * 20 s
Time to trip = ----------------- = 5 s
–4 %
Figure 5-4: Reverse power trip
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