Available set points
Set points available in menu “2610 Power ramp up”:
Ramp speed:
Defines the slope of the ramp up.
Delay point:
The size of each step.
Delay:
Delay at each step before continuing the ramp up.
Enable:
Enables the ramp up function in load sharing mode.
Steps:
Defines the number of ramp up steps.
Deadband:
Deadband for re-entering the ramp up/down sequence.
Ramp down function
When a GB open command has been issued in load sharing mode, the unit will always perform a ramp down
before opening the breaker.
Set points available in menu “2620 Power ramp down”:
Ramp speed:
Defines the slope of the ramp down.
Breaker open:
The amount of power accepted when opening the breaker.
Breaker open df: The breaker will be tripped during ramp down in case the frequency drops more than
the value defined in this setting.
During power ramp down in all modes, the voltage regulator, if active, must regulate towards
power factor 1. This will ensure that current across the breaker is kept at a minimum.
Distance
The inputs on the GPC-3 that are used for load sharing are high impedance inputs (23.5 kOhm), so a cable
length of 300 metres is no problem.
Remember to always use screened cable.
Load sharing type
The output from the GPC-3 is by default adjusted to match other Multi-line 2 and Uni-line products from DEIF
A/S. This selection enables the load share output to operate in the 5 V DC range.
If the load share type is changed to “adjustable” (menu 6390), then the voltage level can be changed in the
range 1.0 to 5.0 V DC (menu 6380). The advantage of this is that the load share output can be connected to
or compared with other systems.
Careful testing must be carried out when different load sharing systems are interconnected.
The reason is that not all systems can be interconnected and still function properly.
If the load share type is changed to “Selco T4800”, "Cummins PCC" or "Woodward SPM-D11", the voltage
level of the load share line adapts to the required level of the selected load share type.
Load share controller
The load share controller is used whenever load sharing mode is activated. The load share controller is simi-
lar to the other controllers in the system, and it takes care of frequency control as well as power control.
Adjustment of the load share controller is done in menu 2540 (analogue control) or 2590 (relay control).
GPC-3 DRH 4189340587 UK
Additional functions
DEIF A/S
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