Specifications

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activation via the control-logic mounted push button located behind the front door.
The level of equalizing voltage shall be equal to that stated by the battery
manufacturer (typically .04 to .08 VDC/cell higher than the specified float level).
Upon completion of the timer count, the Converter output voltage shall return to
the specified float voltage (typically 2.25 to 2.28 VDC/cell).
4.1.9 Input Isolation Transformer
All UPS’ rated for 480V input shall include an input isolation transformer as
standard equipment. An auto-transformer shall not serve as an equivalent.
4.1.10 Battery Temperature Compensation
The UPS shall have, as standard equipment, a battery temperature compensation
function allowing the rectifier voltage to fold-back to a safe value in the event the
battery temperature reaches a pre determined dangerous level.
4.1.10 Step load (0-100%) changes
100% step load changes shall use ONLY the Converter to supply power to the
inverter. The batteries SHALL NOT be cycled at any time during these step
load changes.
4.1.11 DC Breaker
The DC input shall be protected by a DC Breaker that shall also include circuitry
to prevent wrong sequencing during startup or shutdown of the UPS system. The
DC Breaker shall be provided as standard equipment.
4.1.11 DC Ripple voltage
The DC buss rms ripple voltage shall be less than 1% of the UPS’ nominal DC
voltage level at 100% load and with no battery connected. This shall provide for
maximum battery life.
4.2 Inverter
4.2.1 General
The Inverter shall generate AC power that is derived from DC power supplied
from the Converter or the system battery. The Inverter shall be capable of