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User Manual
Hipulse - Single Phase ‘1+N’ UPS System | 130 kVA - 110V |
8.3.1.2 Switching the system to maintenance bypass from normal operation
WARNING
The internal maintenance bypass must not be used when the UPS system is comprised of more than two UPS modules in parallel.
Follow the procedure for the single UPS by referring to Chapter 5 – Operating Instructions: Paragraph 5.4. For a system configured in the “1+N system”, the changeover from “load on inverter ” to “load on bypass” will occur only when the operation described in point 3 has been completed on both UPS modules.
8.3.1.3 Switching the system ON from a maintenance power down condition.
Follow the procedure for single UPS, referring to Chapter 5 – Operating Instructions: Paragraph 5.2 .
8.3.1.4 Switching OFF and isolating one UPS while the other remains in service.
1.In sequence, open the UPS isolators Q4 (output), Q1 (rectifier input), Q2 (bypass input).
2.Open the
To completely isolate the UPS, open the a.c. power supply
If individual UPS output isolation
WARNING
If individual UPS output isolation
Warning : Wait 5 minutes for the internal d.c. busbar capacitors to discharge.
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