HF-702HC control module for genset

Detailed Product Description

HFPLC702 Series Automatic Generator Module
USER MANUAL

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HFPLC702 Auto Start Module

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DESCRIPTION
The Model HFPLC702 is an Automatic Engine Control Module. The module is used to
automatically start and stop the engine, indicating the operational status and fault conditions,
automatically shutting down the engine and indicating the engine failure by LED on the front
panel.
HFPLC702 append a LCD hours count that base on HFPLC702.
OPERATION
Operation of the module is via a three position key switch mounted on the front panel with
OFF(O), START( ) and AUTO( ) positions. In the O position the output are
de-energized.
Manual Operation:
1. Select manual run ( ).
2. Depress pre-heat button for required length of time.
3. Press START( ) to crank engine Once the Start button is pressed and maintained, the
engine fuel system is energized. The Crank output is then energized and the starter
motor operated, disengaging automatically when the engine fires or when the Start
button is released. The protection hold-off timer is then initiated.
Automatic Operation:
1. Select AUTO( )
2. When Remote Start is active, the generators will automatic start. Operation of any of
the following alarms (which are close on fault) will cause the run output to
de-energize:
. Low Oil Pressure
. High Engine Temperature
. Auxiliary Shutdown
. Over speed
This will remove the fuel supply from the engine and bring it to rest. Each alarm has its own
LED indicator and once activated no further alarm conditions will be accepted. The alarm
output and relevant LED will remain active until the until is reset by turning the switch to the
O position.
Over speed Protection
HFPLC702 Auto Start Module

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Over speed protection is derived from the generator Hz output. The over frequency circuit
monitors the generator Hz output and will shut down the engine immediately if a pre-set
frequency level is exceeded. This trip level is selected by a switch for either 50Hz or 60Hz
nominal operation (57Hz or 68Hz trip respectively).
During engine cranking and for a short time afterwards the protection hold-off timer (10
seconds ) is active and the relevant alarm inputs are inhibited. This enables the engine to
start and achieve normal running conditions. Once the timer has expired the inputs are
enabled Providing normal protection from the module.
Charge Failure warning
Charge Failure warning is also provided by monitoring the WL terminal on the charge
alternator. This operates on a similar principal to the warning lamp fitted in a motor vehicle,
should the output fail the charge fail LED will illuminate. The module will also provide the
alternator excitation current via this connection.
SPECI F ICATION
DC Supply:
8 to 35V Continuous.
Alternator Input Range:
15-275 V AC RMS
Alternator Input Frequency:
50-60 Hz at rated engine speed.
(Minimum 75V AC)
Over speed: nominal frequency +14%
(+24% Overshoot)