PowerSure PSA Guide Specification
350 – 1000VA SL-23271 8/03
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B. Voltage Boost/Buck - During input power source abnormalities (sags and swells), the AC
output power is corrected by means of boost (sag correction) or buck (swell correction)
compensation taps. Operation of the compensation taps automatically maintains the proper
output voltage for the connected critical equipment. The compensation taps is designed for
indefinite operation to their limits. Operation of the compensation taps will not discharge the
battery.
C. Recharge - Upon restoration of utility / mains AC power, after a utility / mains AC power
outage and complete or partial battery discharge, the unit automatically restarts and resumes
supplying power to the critical AC load; and the battery charger recharges the battery.
D. Battery - When the input power source exceeds the parameters defined in section 1.3.3.1, the
critical AC load is supplied power by the inverter, which obtains its power from the battery.
Typical detection and transfer time is 4-6 ms.
E. Battery Start- The UPS is capable of starting without input power. The unit starts up and
operates from the battery, with output frequency the same as the last operating frequency.
1.3.2 Design Requirements
A. Voltage: Input/output voltage specifications of the UPS are:
Input:
120V Units: 0-160 VAC, 60/50 Hz auto-sensing, single-phase, 2-wire-plus-ground.
230V Units: 0-300 VAC, 50/60 Hz auto-sensing, single-phase, 2-wire-plus-earth.
Output:
120V Units: 110/120/127 VAC ±10%, 60/50 Hz, single-phase, 2-wire-plus-ground.
(DIP Switch selectable)
230V Units: 220/230/240 VAC ±10%, 50/60 Hz, single-phase, 2-wire-plus-earth.
(DIP Switch selectable)
B. Output Load Capacity: Maximum specified output load capacity of the UPS, regardless of
load power factor, is:
350VA / 210W 500VA / 300W
650VA / 390W 1000VA / 600W
C. Internal Battery: The battery consists of valve regulated, non-spillable, maintenance-free,
sealed, lead-acid cells. The battery is user replaceable and hot swappable.
D. Battery Reserve Time: 5 minutes typical at full load with ambient temperature 77°F (25°C).
E. Battery Recharge: The UPS contains a battery recharge rate designed to prolong battery life.
Recharge time is 6 hours typical to 90% capacity after a complete discharge into full resistive
load.
1.3.3 Performance Requirements
1.3.3.1 AC Input to UPS
A. Voltage Configuration: The UPS operates at these values without drawing power from the
batteries.
110 VAC nominal: single phase, 2-wire-plus-ground: 78 ─ 138 VAC (±3VAC),
Buck compensation: 122VAC (±3VAC)
Boost1 compensation: 98VAC (±3VAC)
Boost2 compensation: 87VAC (±3VAC)
120 VAC nominal: single phase, 2-wire-plus-ground: 85 ─ 145 VAC (±3VAC),
Buck compensation: 133VAC (±3VAC)
Boost1 compensation: 107VAC (±3VAC)
Boost2 compensation: 95VAC (±3VAC)