Woodward GCP-30 Series User Manual

Manual 37365A GCP-30 Series Packages - Genset Control
Page 76/179 © Woodward
"INTERCHANGE" Breaker Logic [GCP-32]
Configuring Parameter 111 to "INTERCHANGE" enables real power control (import/export) through a mains in-
t
erchange operation.
NOTE
For this breaker logic to function correctly, the mains power measurement must be connected proper-
ly. The power controller must also be assigned the properly process identifier (C, I, or E).
In the event of an add-on request, a change is made from mains to generator supply, the following occurs:
• The GCB is synchronized and closed
• The generator assumes load until the mains interchange (import/export) real power is "zero"
• The MCB is opened
When an add-off request has been issued, the load is transferred from the generator to the mains supply. The fol-
lowing occurs:
• The MCB is synchronized and closed
• The generator sheds load until a "zero" power transfer is measured across the GCB
• The GCB is opened
"CLOSED TRANSIT." Breaker Logic [GCP-32]
Configuring Parameter 111 to "CLOSED TRANSIT." enables the MCB and GCB to perform
a closed transition
(make-before-break/overlap synchronization) when transferring from the mains to the generator and back.
NOTE
The GCP does not perform a "zero" power transfer when opening or closing the MCB or GCB. The cir-
cuit breakers will be opened regardless of the monitored power.
In the event of an add-on request, the load is transferred from mains to the generator. The following occurs:
• The GCB is synchronized and closed
• The MCB is opened and the generator assumes all loads
After the engine shed-off request has been issued, the load is transferred from the generator to mains. The fol-
lowing occurs:
• The MCB is synchronized and closed
• The GCB is opened and the mains assume all load
NOTE
When the GCP is configured for a closed transition, the maximum time of the transition between the
MCB and the GCB is 500ms. This time is measured from the moment that the breaker closure reply is
received until the moment that the CB open command is issued.

Woodward GCP-30 Series Specifications

General

Brand	Woodward
Model	GCP-30 Series
Category	Controller
Language	English