DECS-200 BESTCOMS Software 5-23
Generator Overvoltage, Delay.
Sets the time delay for the generator overvoltage protection function. This
setting is active only when generator overvoltage protection is enabled on the Options tab. A setting of
0.1 to 60 seconds may be entered in 0.1 second increments.
Exciter Field Overvoltage, Level.
Configures the setpoint for field overvoltage protection. This setting is
active only when field overvoltage protection is enabled on the Options tab. When the field voltage
reaches the level of this setting and the associated time delay expires, the corresponding protection alarm
indicator lights. (See the Alarm/Status or Analysis Screen for the detailed alarm LED signals.) If
programmed for the field overvoltage function, one or more of the three programmable output relays are
actuated. A setting of 1 to 325 Vdc may be entered in 1 Vdc increments.
Exciter Field Overvoltage, Delay.
Sets the time delay for the field overvoltage protection function. This
setting is active only when field overvoltage protection is enabled on the Options tab. A setting of 0.2 to
30 seconds may be entered in 0.1 second increments.
Exciter Open Diode, Level.
Configures the percent of rated field current that indicates an open exciter
diode. This setting is active only when open exciter diode protection is enabled on the Options tab. A
setting of 0 to 100% may be entered in 0.1% increments.
Exciter Open Diode, Inhibit Level.
Configures the percent of rated field current that disables both open-
and shorted-diode protection. This setting is active only when open exciter diode protection is enabled on
the Options tab. A setting of 0 to 100% may be entered in 0.1% increments.
Exciter Open Diode, Delay.
Sets the time delay between when an open exciter diode is detected and
annunciated. This setting is active only when open exciter diode protection is enabled on the Options tab.
A setting of 10 to 60 seconds may be entered in 0.1 second increments.
Generator Undervoltage, Level.
Configures the setpoint for generator undervoltage protection. This
setting is active only when generator undervoltage protection is enabled on the Options tab. When the
generator terminal voltage reaches the level of this setting and the associated time delay expires, the
corresponding protection alarm LED lights. (See the Alarm/Status or Analysis screen for the detailed
alarm LED signals.) If programmed for the undervoltage function, one or more of the three programmable
output relays are actuated. A setting of 0 to 30,000 Vac may be entered in 1 Vac increments.
Generator Undervoltage, Delay.
Sets the time delay for the generator undervoltage protection function.
This setting is active only when generator undervoltage protection is enabled on the Options tab. A
setting of 0.5 to 60 seconds may be entered in 0.1 second increments.
Exciter Field Overcurrent, Level.
Configures the setpoint for field overcurrent protection. This setting is
active only when field overcurrent protection is enabled on the Options tab. When the field current
exceeds the level of this setting and the associated time delay expires, the corresponding protection
alarm LED lights. (See the Alarm/Status or Analysis Screen for the detailed alarm LED signals.) If
programmed for the field overcurrent function, one or more of the three programmable output relays are
actuated. A setting of 0.1 to 16.0 Adc may be entered in 0.1 Adc increments.
Exciter Field Overcurrent, Delay.
Selects the time delay between when the field current reaches the
Exciter Field Overcurrent Level setting and when the alarm annunciates. The time delay is initiated when
the sensed current exceeds the overcurrent setpoint and is inversely proportional to the overcurrent level.
The higher the current level, the less time delay before alarm annunciations. This setting is active only
when shorted exciter diode protection is enabled on the Options tab. A setting of 0.1 to 20 seconds may
be entered in 0.1 second increments.
Exciter Shorted Diode, Level.
Configures the percent of rated field current that indicates a shorted exciter
diode. This setting is active only when shorted exciter diode protection is enabled on the Options tab. A
setting of 0 to 100% may be entered in 0.1% increments.
Exciter Shorted Diode, Delay.
Sets the time delay between when a shorted exciter diode is detected and
annunciated. This setting is active only when shorted exciter diode protection is enabled on the Options
tab. A setting of 5 to 30 seconds may be entered in 0.1 second increments.
Loss of Field, Level.
Configures the setpoint for loss of field protection. This setting is active only when
loss of field protection is enabled on the Options tab. When the kvar value decreases below the negative
value of this setting for the duration of the Loss of Field Delay setting, the corresponding protection alarm
LED lights. (See the Alarm/Status tab of the Metering screen or the Analysis screen for the detailed alarm
LED signals.) Any of the three programmable DECS-200 output relays can be programmed to annunciate
a loss of field condition. A setting of 0 to 3,000,000 kvar may be entered in1 kvar increments.
Loss of Field, Delay.
Sets the loss of field protection time delay. This setting is active only when loss of
field protection is enabled. A setting of 0 to 9.9 seconds may be entered in 0.1 second increments.
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