3.6 Synchronisation to mains
Before
After
Load
G
Load
G
WARNING
It is the operator’s responsibility to make sure that the mains voltage measurement cables ares connected correctly and
the phase sequence is OK, before closing the breaker or connecting the fuses. Wiring errors can lead to loss of life.
WARNING
This procedure assumes that a relay is installed and configured to change the first AGCs voltage measurements during
back synchronisation. If this is not present, the operator must do a manual change to these measurements, and careful
checks are required. See the
RMB Designer's handbook
for more information.
To synchronise to mains:
1. Connect your mains voltage measurement cables between the voltage mains banana sockets on the RMB and the mains
connection point (fuses/breaker). See below for how to connect for 3-phase, or 1-phase measurements.
2. Check that each voltage measurement cable is connected to the right phase.
3. Check that the phases are connected correctly, and the phase sequence (rotation).
4. Switch the function selector to
Synchronisation to mains
.
•
Mode
: If the voltage measurement relay input is activated, when the selector is turned to
Synchronisation to mains
, the
mode in all controllers is changed to
Semi
. If the relay is not activated, the controllers are changed to
Auto
and run in island
operation.
5. The generator(s) do a static synchronisation. When the synchronisation is stable, a lamp comes on and a buzzer is activated.
•
If static synchronisation is not possible or stable enough, adjust the PID control. See the
RMB Designer's handbook
for
more information.
6. Close the mains breaker or connect the fuses.
Three-phase measurement
All three phases are connected on the Remote Maintenance
Box. When using three-phase measurement, it is not necessary
to connect the neutral, as it is calculated internally by the AGC.
OPERATOR'S MANUAL 4189340730C UK
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