Xtreme Power Conversion Corporation
P91, TX91, TX91L, TXVR Service Manual
Page 29
Uninterruptible Power Supply
9. Appendix
9.1 Reference Waveforms
Below are some waveform charts to show normal UPS operation. It’s a very useful reference to verify the test
result in section 8.
CH1: IP SCR driver
CH2: IP voltage
CH3: -BUS voltage
CH4: +BUS voltage
Figure 9.1 Switch on the input breaker without turn on