Basler Electric DECS-250N - Manual (Page 59)

9440500990 Rev D 43
DECS-250N Protection
Figure 27. Overexcitation Protection Settings
A Definite Time Pickup: Adjustable from 0 or 0.5 to 6.00 in increments of 0.01.
B Definite Time Delay: Adjustable from 0.05 to 600 seconds in increments of 0.001 seconds.
C Inverse Time Pickup: Adjustable from 0 or 0.5 to 6.00 in increments of 0.01.
D Time Dial: Adjustable from 0.0 to 9.9 in increments of 0.1.
E Reset Dial: Adjustable from 0.0 to 9.9 in increments of 0.1.
F Mode: Select Enabled or Disabled.
G Curve Exponent: Select 0.5, 1, or 2
Generator Undervoltage
An undervoltage pickup condition occurs when the sensed generator terminal voltage decreases below
the pickup setting
A . An undervoltage trip condition occurs if the generator voltage remains below the
pickup threshold for the duration of the time delay setting B . Generator undervoltage protection can be
enabled and disabled C without altering the pickup and time delay settings. Undervoltage pickup and trip
elements in BESTlogicPlus can be used in a logic scheme to initiate corrective action in response to the
condition. BESTCOMSPlus generator undervoltage settings are illustrated in Figure 28.
Figure 28. Generator Undervoltage Protection Settings
A Generator Undervoltage Pickup (V): Adjustable from 0 to 600,000 Vac in 1 Vac increments.
B Generator Undervoltage Time Delay (s): Adjustable from 0.1 to 60 seconds in 0.1 second increments.
C Generator Undervoltage Enable/Disable: Select Enabled or Disabled.