Alpha Technologies PWE-6FT - Manual (Page 36)

36 031-259-B0-001, Rev A
3.0 Pole-mount Enclosure Maintenance
Preventive Maintenance must be performed every three to six months. By establishing a routine
maintenance program and following the guidelines contained in this manual, the Pole-mount Enclosure
will continue to provide years of trouble free operation.
Inspect the Pole Mount Enclosure
Perform a complete inspection of the Pole-mount Enclosure. Look for signs of rust and corrosion,
paying particular attention to the battery trays. Clean any rust or corrosion immediately.
Inspect the Mounting Brackets and Hardware
Carefully inspect the Pole-mount Enclosure’s Mounting Bracket and mounting hardware. Look for signs
of unusual wear and loose hardware. Correct all mounting hardware failures immediately.
Check Battery Terminals and Connecting Wires
Care of the batteries is a critical step in any maintenance program. In addition to voltage checks,
visually inspect the batteries for signs of cracking, leaking, or swelling. To aid in quick identification and
tracking of voltages in the maintenance log, number the batteries inside the enclosure using labels or
masking tape, etc. Batteries are temperature sensitive and susceptible to overcharging and under-
charging. Since batteries behave differently in the winter than in the summer, Alpha’s battery chargers
automatically compensate for changes in temperature by adjusting float and accept charge voltages.
See the power supply Operator’s and Technical Manual for complete Power Supply Preventive
Maintenance instructions.
Check each battery terminal and connection. Verify the posts are clean and the crimped connectors are
tight. Terminal connectors must be torqued to 60 in-lbs (±3%) / 6.77Nm (±3%) at installation. If there is
an “in-line” or battery-mounted fuse in the battery cable, check the fuse holder and fuse. Verify the
terminals are properly greased with an approved battery terminal corrosion inhibitor such as NCP-2.
Record date of maintenance in the maintenance log.
Check Battery Open Circuit Voltage
Switch the power supply’s BATTERY BREAKER to the OFF position. Disconnect the battery connector
from the Inverter Module and measure the individual voltage across each battery. The difference between
any battery in the string must not be greater than 0.3 VDC. Defective or marginal batteries must be
replaced with an identical type of battery. Record the unloaded battery voltages in the maintenance log.
Whenever the power supply’s BATTERY BREAKER is turned OFF or the batteries are not connected, the power
supply will not operate in Inverter Mode in the event of a utility power failure.