EnerSys Alpha FXM HP 1100, Technical Manual

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0170022-J0 Rev A Page 29
7 Operating the Alpha FXM HP
7.1 Switching the Alpha FXM HP On and Off
Under normal operation, the Alpha FXM HP is always powered ON to supply uninterruptible power to
the load. Switching off the Alpha FXM HP (AC and DC breaker) will disconnect the power supply to the
load. If for any reason you need to switch off the Alpha FXM HP while maintaining power to your critical
load, make sure that you have a plan that provides an alternate source of power.
7.1.1 Switch Off Procedure
1. Switch the AC circuit breaker OFF .
2. Switch the battery circuit breaker OFF .
The LCD display goes blank. The Alpha FXM HP is now switched off and no backup power is supplied
to the load.
7.1.2 Switch On Procedure (LINE mode)
Before you put the Alpha FXM HP back into commission, make sure that the line is qualified and the
batteries are fully charged.
1. Switch the battery circuit breaker ON . The LCD displays STANDBY in the system mode field.
2. Switch the AC input circuit breaker ON . The Alpha FXM HP qualifies the line power. The LCD
displays RETRANSFER then shows LINE, BUCK 1, BUCK 2, BOOST 1, BOOST 2 depending
on the input voltage.
3. If there is no line power, the Alpha FXM HP remains in STANDBY mode until the line power is
qualified. To provide backup battery power to the load, run the Start Up command on the LCD's
System Shortcut Status screen.
The Alpha FXM HP, by default, is configured for auto-frequency detection. When the unit is first
switched on, it senses the line frequency and adjusts its output frequency to match that of the input.
If the auto-frequency detection feature is configured, the Alpha FXM HP may not startup in Inverter
mode since an output frequency is not yet defined. A Frequency Unknown alarm will be activated. To
start up the inverter manually when frequency is undefined, run the Configure FXM System wizard on
the LCD's System Shortcut Status screen to select either 50Hz or 60Hz output frequency.
7.1.3 Switching the Alpha FXM HP from Line mode to Inverter mode
You can force the Alpha FXM HP to operate in the Inverter mode by manually switching off the AC input
circuit breaker. Doing so will effectively disconnect any line power to the Alpha FXM HP, simulating a
power outage which triggers the Alpha FXM HP to switch to the inverter mode of operation.
To switch the Alpha FXM HP from Line mode to Inverter mode:
1. Switch the AC input circuit breaker OFF . The LCD displays INVERTER in the operating mode
field. The status LED starts flashing green to indicate that the Alpha FXM HP is running on backup
battery power. Confirm the load receiving power.
NOTE
:
Do not leave unit in this mode as it will drain the batteries.