SECTION 3
INSTALLATION
DO NOT defeat or otherwise disable any
system interlocks whilst installing this
equipment.
To prevent personal injury or damage to
equipment, only qualified personnel should
install or operate this unit.
Important ! The use of Megger or High Potential test
equipment may result in damage to this unit.
Disconnect all leads before using such
equipment.
3.1 General
The Power Factor Controller PFC3 incorporates as standard
many features which enable it to be used in a wide range of
applications. These features may be used in any combination
depending upon the requirements of the end user.
It is assumed that the AVR is ready wired to the generator as
specified in the appropriate machine wiring diagram.
In ALL applications of the PFC3, the AVR and generator MUST
be equipped with a standard Quadrature Droop Paralleling kit.
This is shown in all figures fitted in 'W' phase (the more normal
position). For exact details refer to the wiring diagrams supplied
with your generator.
The PFC3 should be located in a clean, vibration free
environment, typically on the back panel of a control cubicle. If
the unit is for machine mounting it will have been supplied without
metalwork and MUST be fitted on anti-vibration mounts equal to
those of the AVR.
All wiring should be carried out using cables rated at 6A/600V
(minimum 0.75mm sq : 20AWG). For details of the AVR wiring,
reference should be made to the wiring diagrams supplied with
your generator.
Different applications may demand the installation of one or more
of the optional features offered in the PFC3. Four typical
configurations are described in this manual.
Fig 6 - Basic Operation - Power Factor Control of Individual
Generators
Fig 7 - Replacing earlier VAr2 with the PFC3
Fig 8 - Maximum configuration - All Options Fitted
Fig 9 - PFC3 used for Power Factor Correction
IF IN DOUBT - REFER TO FACTORY
3.2 Generating Set Protection; General
Unless adequate protection is installed, engine control system
malfunction or poor set-up can cause engine over-load or reverse
power conditions resulting in damage to the engine.
Generator control system malfunction or poor set-up can cause
generator over-current or loss of synchronism (pole-slipping)
resulting in severe damage to the generator.
Generator Over-current Protection
It is the responsibility of the Generating Set Assembler to ensure
that adequate protection systems are installed to trip the
generator circuit breaker in the event of generator over-current.
Excitation Loss Protection
It is the responsibility of the Generating Set Assembler to ensure
that adequate protection systems are installed to trip the
generator circuit breaker in the event of loss of synchronism.
Newage International Ltd. can supply a suitable unit for linking
with the generator circuit breaker and control gear. Please refer to
factory for details.
Automatic Synchronisers
It is the responsibility of the Generating Set Assembler to ensure
that adequate protection systems are installed for Automatic
Synchronising of AC Generators.
The following Automatic Synchroniser settings are recommended
when using PFC3:-
Generator frequency mismatch 0.1 Hz
Voltage mismatch +/-3%
CB closing angle +/-10 degrees
Over/Under Voltage Protection
It is the responsibility of the Generating Set Assembler to ensure
hat adequate protection systems are installed to prevent damage
to the generator or connected equipment in the event of over or
under voltage caused by malfunction/poor set-up of the control
system.
3.3 Basic Operation - Power Factor Control of
Individual Generator(s) - Fig 6
This is the simplest configuration involving one or more
generators coupled to the mains bus.
3.3.1 Voltage Input ( E2 , E1 )
These are connected to the generator output terminals (normally
'U' phase and Neutral) and act as the power supply to the unit as
well as its sensing input. The maximum voltage allowed at these
terminals is 277Vac/60Hz. If local regulations demand supply
fuses, then these should be rated at 5A.
3.3.2 Current Input ( S1 , S2 )
These are connected to the generator current sensing C/T having
a secondary rating of 5A. This MUST be positioned in the correct
phase and with the correct polarity for successful operation of the
PFC3. See wiring diagrams for details of your particular machine.
If local regulations demand, then either lead S1 or S2 may be
grounded.
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