Galaxy PW™ UPS 100 to 225kVA
For stable or slowly varying load conditions, the inverter output voltage is regulated to within ±0.5% in amplitude.
The frequency of the output voltage can theoretically be regulated to within 0.1% of the rated value, however the output frequency range may be intentionally extended to a maximum of ±2 Hz so that the inverter can remain synchronized with the bypass AC source and its inherent frequency fluctuations, thus enabling transfer of the load to the bypass line at any time.
When the bypass AC source frequency returns to within the specified tolerances, the inverter is gradually re- synchronized to the bypass line at a rate of 0.5 Hz to 2 Hz/s (as per the value personalized by the
The inverter output voltage is not notably affected by instantaneous major variations in load characteristics.
This is made possible by the PWM (Pulse Width Modulation) chopping technique and the
The battery charge cycle takes place in two steps:
step 1: The battery is recharged at a constant current limited to 0.1C10 (i.e. 1/10th of the battery capacity specified for a 10 hour discharge). The DC voltage increases with the battery charge until the charge level is reached.
step 2: The battery is recharged at constant voltage equal to the charge level. The charging current gradually decreases until reaching a specified low value (floating current).
For vented
4 — 10 | Operation |