Basler DECS-200 User Manual

5-24 BESTCOMS Software DECS-200
Relay Logic
Logic settings for the three programmable relays are divided between two tabs labeled Relay #1, #2 Logic
and Relay #3 Logic. Because the settings for each programmable relay are identical, only the Relay #1,
#2 Logic tab is illustrated here (Figure 5-27).
Figure 5-27. Protection Screen, Relay #1, #2 Logic Tab
Protection.
A programmable relay can be configured to annunciate any of nine active protection functions.
These protection functions include:
• Field overcurrent
• Field overvoltage
• Generator overvoltage
• Generator undervoltage
• Loss of field
• Loss of sensing voltage
• Open exciter diode
• Shorted exciter diode
• System frequency below 10 Hz
Setpoint Limit. A programmable output can be configured to close when the active setpoint reaches the
upper limit or lower limit.
FCR Mode. Enabling this setting closes the programmable output when the DECS-200 is operating in
FCR (Manual) mode.
Limit. A programmable output can be configured to close when the following limits are reached:
overexcitation, stator current, underfrequency or volts per hertz, and underexcitation.
Relay Setting
Contact settings for each of the three programmable relays are adjusted on the Relay Setting tab. Relay
Setting tab settings are illustrated in Figure 5-28 and described in the following paragraphs.
Contact Status. Configures the output contacts as normally open (NO) or normally closed (NC). Normally
closed, programmable relay outputs do not remain closed when control power is removed from the
DECS-200.
Contact Type. Selects one of three contact types: Momentary, Maintained, or Latched. Selecting
Momentary closes or opens the relay contacts for the duration determined by the Momentary Time
setting. Selecting Maintained closes or opens the relay contact for the duration of the condition triggering
the relay’s change of state. Selecting Latched latches the relay contacts closed or open until the relay is
reset by the user.
Momentary Time. When Momentary is selected as the contact type, this setting controls the duration that
the contact is open/closed when the relay output is active. A setting of 0.1 to 5 seconds may be entered in
0.05 second increments.

Basler DECS-200 Specifications

General

Brand	Basler
Model	DECS-200
Category	Controller
Language	English