3.4 Deload mains
Before
After
Load
G
Load
G
Mode
: When the selector is turned to
Deload mains
, the mode in all controllers is changed to
Semi
.
To deload the mains (load takeover):
1. In the first controller, adjust the power factor in parameters 7052 and 7053.
2. Turn the function selector to
Deload mains
.
3. Adjust the generator power using the power switch.
•
When controlling the generator power using the power switch, select the display view with the actual and current power
reference.
•
The first controller changes the power set point by 1 % per second of power switch activation. For example, if the power
switch is activated
up
for 100 ms, then the power set point is increased by 0.1% of the genset(s) nominal power.
4. Measure the current flow from the mains using a hand-held ammeter.
•
If required, adjust the power factor to minimise the current.
5. When the mains is deloaded, the mains breaker can be opened or the fuses can be removed.
•
When the breaker is opened/the fuses are removed, the generator(s) are still in fixed power mode. To switch the generator(s)
from power regulation to frequency regulation, turn the function selector to
Island
as quickly as possible.
WARNING
Sometimes a second source can provide power to the busbar without the operator’s knowledge (for example, a busbar ring
main).
OPERATOR'S MANUAL 4189340730C UK
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