Deif Multi-line 2 - Page 18

AGC Designer’s Reference Handbook
DEIF A/S Page 18 of 168
Test mode description
Manual mode description
Block mode description
Mains power export (fixed power to mains)
Auto mode description
The mains power export mode can be used to maintain a constant level of power through the
mains breaker. The power can be exported to the mains or imported from the mains, but always
at a constant level.
The gen-set starts as a result of a digital start command. It synchronises to the mains and will
start to export power to the mains. The amount of power exported or imported will be kept at a
fixed level regardless of the load on the busbar (the factory).
The stop command will cause the gen-set to deload and trip the generator breaker. Afterwards,
it will cool down and stop.
A 4-20mA transducer is used for indication of the power exported from the mains. The example
below shows a situation where the setpoint is adjusted to exporting power to the mains.
Diagram, mains power export - example
See general test mode description valid for all gen-set modes on page 20.
See general manual mode description valid for all gen-set modes on page 21.
See general block mode description valid for all gen-set modes on page 21.
Mains power export setpoint
Ramp up
Ramp down
kW
t
Start si
g
nal
Stop si
g
nal
If a fixed level of imported power must be used, it is still the mains power
export mode that must be selected! This mode covers import as well as export.