Chapter 4 Commissioning of UPS
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1. Switch from normal mode to battery mode. Switch off Q1 to enter battery mode
and after a few seconds, switch on Q1 again to return to normal mode
2. Press “inverter shutdown” button to switch to bypass mode. After a short while,
start inverter again to return to normal mode.
3. In bypass mode, switch on Q1 and press “inverter start” button after the rectifier
starts. The UPS should switch to normal mode.
4. Switch from normal mode to maintenance bypass mode. Press “inverter
shutdown” button, switch off Q1, switch on Q3BP, switch off Q2, Q5, QF1. At this
time the bypass source will power the load through Q3BP.
5. Check that the generator set and the UPS battery can work together.
6. A parallel system can also switch between different operation mode.
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