INFO
For a general description of the available running modes, see Running modes.
2.4.10 Load takeover
Auto mode description - Back synchronising ON
The purpose of the load takeover mode is to transfer the load imported from the mains to the genset for operation on generator
supply only.
When the start command is given, the genset will start and synchronise the generator breaker to the busbar that is being supplied by
the mains. When the generator breaker is closed, the imported load is decreased (the power is being transferred to the genset) until
the load is at the open breaker point. Then the mains breaker opens.
When the stop command is given, the mains breaker is synchronised to the busbar and after closure the genset is deloaded, cooled
down and stopped.
A 4-20 mA transducer is used for indication of the power imported from the mains, see the Mains transducer description later in this
document.
Diagram, load takeover - example
kW
Start signal
Stop signal
Mains power
Generator power
MB opens
GB opens
t
INFO
The load takeover mode can be combined with the overlap function. In that case, the generator and the mains breakers will
never be closed at the same time for a longer period than the adjusted overlap time.
INFO
If the imported load is higher than the nominal genset power, an alarm appears and the load takeover sequence is paused.
Auto mode description - Back synchronising OFF
When the start command is given, the genset will start. When the frequency and voltage is OK, the mains breaker is opened and the
generator breaker is closed. Now, the generator supplies the load until the stop command is given. Then, the generator breaker
opens and the mains breaker closes. The genset cools down and stops.
INFO
If the imported load is higher than the nominal genset, an alarm appears and the load takeover sequence is paused.
DESIGNER'S HANDBOOK 4189341275A EN Page 23 of 196
To Next Page
Loading...
Need help?
General
