Deif GPC-3 Designers Reference Handbook

7.6 Asynchronous synchronisation
This function requires option M4.
Closing of a breaker for an asynchronous generator (also called induction generator) can be selected in menu
6361 where the selection of generator type is made. When the generator type is set to “asynchronous”, the
closing of the breaker is based on the MPU signal only.
Running feedback
The MPU input must be used as primary running feedback when the asynchronous generator is used. The
start and operation of the generator requires that the nominal speed is adjusted (for example, 1500 or 1800
RPM).
Breaker closing
When the genset is running, the GB can be closed in local or remote mode. During the GB close sequence,
the speed set point will be:
RPM set point = RPM nom. + (RPM SLIP min. + RPM SLIP max.)/2.
The acceptable slip frequency is set in menu 2010.
When the speed set point is reached, the close GB signal is issued. After the GB has been closed and run-
ning has been detected on the voltage and frequency, the regulation mode will change according to the regu-
lation mode inputs.
After the GB has been closed, the control of the “asynchronous” generator is the same as for
the “synchronous” type.
7.7 Blackout closing
If required, the unit can be enabled to close the GB on a dead bus. This can be handled in one of the follow-
ing ways:
1. Enable GB black closing in menu 2113
2. Use the digital input function “Enable GB black close”
Setting of
2013 “Sync.
blackout”
“Enable GB black close” input
NOT defined* (default)
“Enable GB black close” input defined*
OFF (default) The unit is not able to close the GB
onto a dead busbar
Closing of the GB onto a dead busbar is control-
led by the digital input alone
ON The unit will close the GB onto a
dead busbar
*Defined means that the function has been dedicated to a specific input by means of the input/output configu-
ration in the PC utility software.
As shown in the table above, the digital input function “Enable GB black close” will overrule the setting of
menu 2113.
GPC-3 DRH 4189340587 UK
Synchronisation
DEIF A/S Page 118 of 122

Deif GPC-3 Specifications

General

Brand	Deif
Model	GPC-3
Category	Controller
Language	English