Stamford PFC3 - Operation; General Operation; Combined Heat And Power Installations; Peak Lopping Installations

SECTION 6
OPERATION
6.1 General
Important ! Before putting the generator into full operation
the Trim control on the AVR MUST be set to the
fully clockwise position.
Under normal circumstances the operation of the PFC3 is fully
automatic and once commissioned the unit should continue to
operate without further attention.
Once commissioning is complete it will only be necessary to set
the operational power factor on the PF/VAR control on the PFC3.
The actual operating point of the power factor controller will be
determined by the application and the following notes are for
guidance only.
6.2 Combined Heat And Power Installations
Installations where the generator is operated at a kW rating
dependent upon the 'heat' demand from the site.
Normal PFC3 setting would be 1.0pf to 0.8pf lag to optimise the
utilisation of the generator rating but care must be taken not to
export unacceptable levels of VAr to the mains supply.
6.3 Peak Lopping Installations
Installations where the generator is used to supply all the site
load in excess of a maximum set by the mains provider.
Normally the PFC3 would be set to generate at a power factor
equal to the site load average and at a fixed power level
(maximum rating of the set) in order to reduce the incoming
demand on the mains to a minimum.
6.4 Power Factor Correction
The generator is used to provide the site VAr necessary to
maintain the power factor of the incoming mains supply within
fixed limits.
Normal PFC3 setting would be 1.0pf to 0.8pf lag to optimise the
power factor of the incoming supply, care must be taken that the
generator rating is not exceeded. The current limiting feature of
the PFC3 MUST be used in this situation.
6.5 Synchronous Motors
Using an a.c generator as a synchronous motor will demand a
setting of 1.0pf to 0.9pf on the PFC3.
Important ! Users of ac generators as synchronous motors
must provide the necessary equipment and/or
procedure for starting e.g pony motor.
When using an ac generator (equipped with a PFC3) as a
synchronous motor, the wiring required is identical to that of
generator applications. There is NO requirement to reverse C/T
or any other phase sensitive connections.
6.6 Overvoltage
If at any time during generator operation, the terminal voltage
exceeds the rated generator voltage stated on the nameplate,
then stop the generator and consult the factory.