Specifications

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3.4 Output
3.4.1 Nominal output voltage: 208V, 3 phase, 4 wire.
3.4.2 Nominal dynamic voltage regulation: ± 1% for unbalanced loads.
3.4.3 Manually adjustable output voltage: ± 5% range.
3.4.4 Voltage transient response: Voltage transient response shall not exceed the
following, and shall recover to within nominal voltage regulation limits within
16.7 msec:
a. ± 2% for a 100% load step.
b. ± 1% (loss or return of AC input).
c. ± 5% (inverter ⇔ bypass).
3.4.5 Output frequency (inverter synchronous): 60 Hz (tracks frequency of static bypass
source).
3.4.6 Output frequency slew rate (inverter synchronized to static bypass): 0.5 Hz, 1 Hz
or 2 Hz or 3Hz/second (selectable).
3.4.7 Free running output frequency (on battery or asynchronous): 60 Hz +/- 0.01%.
3.4.8 Output voltage harmonic distortion:
a. 2% THD maximum with 100% linear load.
b. 5 % THD maximum with 100% non-linear load. Load power factor
range of 0.7 lagging to 1.0 within Kw rating of UPS.
3.4.9 Output overload capability:
a. 105% to 125% for 10 min. (voltage regulation maintained).
b. 126% to 150% for 10 seconds (voltage regulation maintained).
3.4.10 Output fault clearing: typically 1000% for 1 cycle (utilizing bypass source).
3.5 Environment
The UPS shall be capable of withstanding any combination of the following external
environment conditions without mechanical damage, electrical failure or degradation of
operating characteristics.
3.5.1 Efficiency:
a. DC to AC (emergency mode, 100% load): XX %
b. AC to AC (normal mode, 100% load): XX %
3.5.2 Ambient operating temperature range: 0 to +40 degrees °C (no derating required).
3.5.3 Recommended operating temperature range: +20 to +30 degrees °C.