Specifications

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4.1.3. Automatic Input Walk-in
The Rectifier logic shall employ circuitry to allow a delayed and timed
ramping of input current. Subsequent to energizing the Rectifier input, the
ramping of current shall be delayed by a maximum of 3 seconds. Upon
starting the walk-in process, the ramping of current shall be timed to assume
the load gradually within 5 through 30 seconds (every 5 seconds selectable).
This function shall be supplied as standard equipment.
4.1.4. Input Overload Protection
AC input contactor and fuses shall provide Rectifier input overload protection.
4.1.5. Step load (0-100%) changes
100% step load changes shall use ONLY the Rectifier to supply power to
the inverter. The batteries SHALL NOT be cycled at any time during
these step load changes.
4.2. Charger/Booster
4.2.1. General
Solid state PWM controlled IGBT power transistors for charger switching
at 12kHz. Switching shall be defined as IGBT turn on and turn off rate.
4.2.2. Battery Charge Current Limit
The Charger logic shall provide DC battery current limiting for controlled
battery charging. The following battery current limits shall be provided as a
minimum:
a. Battery charge current limit 10% of battery Ah rate.
b. Overcurrent protection to system battery 350% of rated kW.
4.2.3. Equalize Charge Timer
The UPS logic shall provide a 24 hour electronic automatic equalize charge
timer. The timer circuit, once activated, shall provide a high rate equalizing
charge voltage to the system battery for the selected time. The circuit shall
also be capable of manual activation via the control-panel mounted push
button and de-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