HMC6 Power Management Controller User Manual
Page 15 of 87
b)
Should the generator units are started successfully, the system will start the next generator in line if the
power is insufficient;
c)
Should the generator units are in normal running, if a heavy consumer is requested, the system calculates
the power needed and starts additional gensets to satisfy the requires;
d)
If there trip and fault shutdown alarms occur, the corresponding number of units are automatically
started to meet the load requirements;
e)
Linear start mode: if generator’s priority level changes, higher priority level standby genset will be started;
f)
Duty time start mode: gensets will be started according to the duty-hour.
Auto Start
a)
Generator enters into “start delay” as soon as “Auto Start” is active;
b)
After the Start Delay has expired, the system enters into “Start Output Delay” while the start relay will
activate;
c)
When start delay is over, “Start Wait Delay” will be initiated. “Fail to Start” latched alarm will be initiated if
the collected generator voltage and frequency can not meet with on-load requirement after the “Start
Wait Delay” has expired;
d)
If on-load requirement been satisfied in “Start Wait Delay”, “Load Stability Delay” will be initiated. “F/V
Fault” alarm will be initiated if the on-load requirement has Not been achieved after the “Load Stability
Delay” has expired. The alarm type of “F/V Fault” is latched which means users can restart the generator
only when the alarm is acknowledged. However, it enters into “Normal Running” status if the on-load
requirement has been achieved;
e)
If the switch is not closed during the normal running status and the voltage/frequency has not satisfy
the on-load requirement suddenly, “Transient Fault Delay” will be initiated. “F/V Fault” latched alarm will
be initiated if the on-load requirement has not been achieved after the “Transient Fault Delay” has
expired. If the on-load requirement has been achieved within delay time, genset will enter into “Normal
Running” state;
f)
After controller entering into normal running state, and mean while on-load requirement has been
achieved (generator normal light will illuminate), the genset will close and synchronize automatically;
g)
In case of multi-set operation, the genset will share load automatically;
h)
If there is trip alarm or shutdown alarm occurs, then the system will trip or shutdown and the alarm
information will be displayed on the LCD.
Auto Stop Rules
a)
In multiple gensets running system, if the system detects that the load power has fallen below the stop
power, the controller will transfer load according to the start priority firstly and then open breaker and
shutdown;
b)
If there is trip alarm or shutdown alarm occurs, the fault genset breaker will be opened and shutdown;
c)
If there is safe trip alarm or safe shutdown alarm occurs, the fault genset will be unloaded and open
breaker to stop after new genset started up and on-load requirement of the busbar is satisfied;
d)
Linear start mode: if generator’s priority level changes, after higher priority level standby genset started
up, in case of load power falls below shutdown power, genset will be unloaded and open breaker to stop;
e)
Duty time start mode: gensets will be stopped according to the duty-hour.
Auto Stop
a)
When stop input is activated in auto mode, system enters into “Stop Delay” state;
b)
After “Stop Delay” is expired, in case of multi-set operation, genset will be opened after transferring the
load;
