HPM6 Power Management Controller User Manual
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c)
“Load Stable Delay” will be initiated when crank disconnect conditions are reached during start wait
delay process. “Frequency/Voltage Fault” block alarm and shutdown will be initiated if generator
voltage and frequency do not reach the set value after the “Load Stable Delay” has expired. It enters
into “Normal Running” status if the on-load requirement has been achieved;
d)
If the switch is not closed during the normal running status and the voltage/frequency has not
satisfied the on-load requirement suddenly, “Transient Fault Delay” will be initiated.
“Frequency/Voltage Fault” block alarm and shutdown will be initiated if the on-load requirement has
not been achieved after the delay has expired. It enters into “Normal Running” status if the on-load
requirement has been achieved during delay period;
e)
Under normal running status, genset will close and synchronize automatically after pressing the
key; In case of single unit running, it will close breaker directly;
f)
In case of multi-set operation, the genset will share load automatically;
g)
If there is trip or shutdown alarm occurs, then the system will trip or stop and the corresponding
alarm information will be displayed on the LCD.
Semi-auto Stop:
a)
In breaker close status, press
key, in case of multi-set operation, first of all, the system will
transfer load and open breaker; in case of single unit running and semi-auto intelligent open is
enabled, it cannot open, otherwise it will open directly;
b)
In breaker open status, press
key, system will enter into “Stop Output Delay” while the stop
relay will activate;
c)
After “Stop Output Delay” is over, system will enter into “Wait for Stop” delay. If genset voltage and
frequency signals disappear during the delay, controller will judge that the genset stops and in
standby state; otherwise, if genset voltage and frequency signals still can be detected after the delay
expired, controller will judge that the genset fails to stop;
d)
After genset fails to stop, if voltage and frequency signals are disappeared, controller will judge that
the genset stops completely and in standby state.
7.1.3
AUTO MODE
Auto mode is activated by pressing
key.
All available diesel gensets are controlled by the power management system and are started and
stopped according to the start priority and the actual bus load. Should a running generator develop the
trip alarm, the system will start the next generator in line and synchronize its breaker before taking the
failing generator out of service. At the same time, the system detects whether gensets are overloaded.
Should that be the case, the Non Essential Load (NEL) trip will activate to maintain power supply to bus.
Auto Start Rules:
a)
If the system detects that there is no voltage signal on bus, then corresponding gensets are started
according to the start priority;
b)
After load increasing, the system will start the next genset in line if the power is insufficient;
c)
If a heavy consumer is requested, the system will calculate the power needed and automatically
start corresponding gensets to satisfy the requirement when power is insufficient;
