Woodward GCP-20 Series User Manual

Manual 37128A GCP-20 Series - Genset Control
Page 34/190 © Woodward
Multifunction
Terminal 6
Discrete input terminal 6 may reveal different functions according to the following description.
Please note that, when used as a sprinkler input, the discrete input reveals negative functional
logic. The logic circuit is selected by means of a configuration screen
• Sprinkler By resetting the terminal 6 (application of a Low-level) the sprinkler operation is activated accord-
ing to the description of functions. This is terminated by setting terminal 6 (application of a High
signal). Attention:
Negative functional logic!
• Motor release Here, the terminal 6 has the same function as the STOP-button: Resetting the terminal 6 (application
of a LOW level) avoids that the engine is started and stops a genset which is already running; the
application of a HIGH level releases the start of the genset. Attention:
Via this function, emergency
power operation is also prevented or aborted. Emergency power is not possible without this release
signal! The motor release function is only possible in "AUTOMATIC" operating mode.
• ext. acknowledge While in the operating modes "STOP" and "AUTOMATIC" external alarms may be acknowledged
by setting the terminal 6 (change of slope from a LOW to a HIGH level). In order to achieve further
acknowledgment, terminal 6 must accordingly first be reset and then set again. If a continuous
HIGH signal is present at terminal 6, this has no effect on the acknowledgment and suppression of
alarm messages.
no CB by start
Terminal 5
If the terminal 5 is set, the genset starts, no synchronization is carried out and the generator power
circuit breaker is not switched on (no switching to the dead busbar). The GCB is only switched on
in case of emergency current. After the return of the mains the transfer to the mains is carried out
according to the preset switch logic. If, for the circuit breaker logic "Parallel", the genset is set to
operation parallel with the mains, and if the terminal 5 is activated, the GCB is opened after a
power reduction. The genset keeps on running in no-load operation with the GCB open. By deac-
tivating the terminal 5 the genset is shut down without coasting.
Reply: GCB is open
Terminal 4
With this input (logic "1") the open nature of the generator power circuit breaker is an-
nounced to the unit (the LED 11 "GCB ON" is off).
[GCP-20/22]
Reply: MCB is open
Terminal 54
With this input (logic "1") the open nature of the mains power circuit breaker is announced to
the unit (the LED 10 "MCB ON" is off).
[GCP-21]
Isolated operation
Terminal 54
With this input (logical "0" → logical "1") the device receives the annunciation that the gen-
set is working in isolated operation (the LED 10 "Mains parallel" is off). This discrete input is
used to decide whether, after closing the GCB, frequency control (terminal 54 = logical "1")
or power control (terminal 54 = logical "0") is to be carried out.
[GCP-20/22]
Release MCB
Terminal 53
Set .................... An [GCP-22] mains parallel operation is possible and the mains circuit
breaker is operated.
Reset ................ An isolated operation is carried out (frequency and voltage regulation), and
the mains circuit breaker is not operated.
[GCP-21]
Mains parallel operation
Terminal 53
The input signal of this discrete input must always be negated in connection with the discrete
input "response: MCB is open" / "isolated operation" (terminal 54).
Discrete Inputs
Terminals 61 to 74
Programmable alarm inputs with clear text display, alarm class, delay, engine start delay and
closed /working current release (description starting from page
121).

Woodward GCP-20 Series Specifications

General

Brand	Woodward
Model	GCP-20 Series
Category	Control Unit
Language	English