OnLine Power PBC I - Manual (Page 14)

Battery Tray
Houses the internal backup batteries:
The 650 W version, with 4 x 50A/hr batteries are mounted in the tray, supplying 48VDC to UPS
(LU0.4XXX) .
The 1300 W version, with 6 x 50A/hr batteries are mounted in the tray, supplying 72VDC to UPS( LU1.5XXX).
Also, the Battery Tray has the OPTION of heaters to ensure operation down to –40
Ο
C where the batteries
will be kept at a temperature of 0
Ο
C
± 5 Ο
C .
• The front view of the battery tray (see iIllustration 1-5).
BATTERY BATTERY
CB 2
P3
BATTERY PLUG
Battery Tray (Lower Tray)
Illustration 1-5
The simplified construction into two major components makes for fast and easy repair of the unit in the field where
the batteries, Battery Tray, Electronics Tray composes the only FRU items within the unit.
• Temperature Compensated Fast Battery Charger (A 7 PCBA)
The Fast Charger will charge the batteries when discharged as well as to keep the batteries charged. The
recharging time varies based on the backup time and the critical load supported by the batteries during the
input power outage.
650 W uses 1625-229-01 Charger, 55 VDC @ 4 AMPS. approximate 1.8 watts (LU0.7XXX & LU0.4XXX UNITS).
1300 W uses 1625-229-02 Charger, 81 VDC @ 2.7 AMPS. approximate 1.8 watts (LU1.5XXX UNITS).
• Automatic Internal Bypass Switch
The PBC has a UPS assembly designed to operate reliably for many years. However if there is an internal
Inverter failure within the UPS, it will use the automatic internal bypass switch. This switch will bypass the
inverter, when utility power is available via the transformers, to support the full rated load.
• External Padlock
The cabinet possesses an external padlock receptacle to prevent unauthorized personnel from gaining access to
the interior of the cabinet via the front door when used in conjunction with a customer supplied padlock.
•
Over Temperature Shutdown
While the PBC has several internal fans operating when the PBC & UPS Is “ ON ” to prevent an overheating
condition, further protection has been built into the UPS to ensure against circuit failure due to internal
overheating. If there is an Over Temperature condition, the UPS shall shut down. It has an auto-recovery
feature, so that when the temperature reaches a safe level, the UPS will come back on. There is a built-in
hysteretic feature to prevent any oscillatory condition of the UPS turning “ ON ” and “OFF” at the Over
Temperature trip point from taking place.
•
Over Current Protection
If there is the load or loads draw excessive output current from the PBC. The sensing circuit in the Inverter will
provide feedback to cause the Inverter to limit the current and thereby prevent the unit from being damaged
due to such a condition.
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