Deif GPC-3 Designers Reference Handbook

Compensation for isochronous governors
When the genset is equipped with a governor that only provides isochronous operation, the droop in the
GPC-3 can be used to compensate for the missing droop setting possibility on the governor.
Dependency
Droop mode is active when:
Input Active mode
Droop
Control inputs Start sync./control 25 ON
De-load 43 OFF
Breaker feedbacks CB open 54 OFF
CB closed 55 ON
Mode inputs Frequency droop User def. ON
To activate the use of “Start sync./control” from M-Logic or external communication (for exam-
ple Modbus), the M-Logic command “Start sync./ctrl enable” must be activated. Alternatively,
you can use the functions “Remote GB ON” and “Remote GB OFF”.
Regulator
The frequency controller is used in the GPC-3 when operating in frequency droop mode. This means that as
long as the power does not match the frequency, the governor will be controlled up- or downwards. In this
way, the power and the frequency will always end up matching each other according to the adjusted droop
curve.
3.6 P load sharing
This regulation mode is typically used when paralleling two or more gensets. During load sharing operation
with other gensets, the power and frequency of each individual genset can be changed. This means that if the
fuel supply is changed to the engine, the power of the genset – and subsequently the frequency – will
change.
Dependency
P load sharing mode is active when:
Input Active mode
Load sharing
Control inputs Start sync./control 25 ON
De-load 43 OFF
Breaker feedbacks GB open 26 OFF
GB closed 27 ON
Mode inputs P load sharing 49 ON
GPC-3 DRH 4189340587 UK Functional descriptions
DEIF A/S Page 12 of 122

Deif GPC-3 Specifications

General

Brand	Deif
Model	GPC-3
Category	Controller
Language	English