Tripp Lite SU40KX Owner's Manual for 3-Phase UPS 932688 - Page 31
Manual Bypass Procedure Parallel UPS
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9 - Start-Up, Shutdown and Bypass (continued) 1 9-10 Manual Bypass Procedure (Parallel UPS) Warning: When the UPS system is in manual bypass, the inverter shuts down. Connected equipment loads are powered by the bypass (reserve) power source and will not receive battery backup during a utility power failure. 2 •1 For the first UPS system you wish to shut down, press the OFF button A for 3 seconds (until you hear a beep), then release the button. If the other UPS system can support the connected equipment loads alone, the UPS system that was turned off will shut down its inverter and its LCD screen will read "LOAD NOT POWERED". The other UPS system's LCD screen will read "ONLINE MODE". If the total connected equipment load is too large to be handled by a single UPS system, both UPS systems will shut down their inverters and switch to bypass mode, and their 1 LCD screens will read "ON AUTO BYPASS". Repeat step 1 for the second UPS system you wish to shut down. 3 A 4 •2 Switch off the main input circuit breaker switch Q1 of each UPS system. Q1 5 Output Manual Bypass Main 2 Bypass Input Input 6 •3 Confirm that both UPS systems are shut down, then switch on the manual bypass input circuit breaker switch Q3 of each UPS system. The bypass (reserve) power source will power the loads and the LCD screen will read "ON MANUAL BYPASS". Q3 7 Output Manual Bypass Main 3 •4 Switch off the bypass input circuit breaker switch Q2 and the Bypass Input Input 8 output circuit breaker switch Q4 of each UPS system. The LCD screen will turn off completely. Q4 Q2 9 Output Manual Bypass Main 4 Bypass Input Input •5 If the UPS systems have external battery cabinets connected, 10 switch off the external battery cabinet circuit breaker switch A of each battery pack. On the SU20KX or SU40KX, turn OFF the A battery breaker on the back of the UPS. 11 •6 In this mode, only the manual bypass path (including the manual bypass circuit breaker Q3 ), the load terminals of the output circuit breaker switch Q4 and the terminal block B contain hazardous voltage, allowing qualified service personnel to perform maintenance or repair. Note: Qualified service personnel may prefer to de-energize the UPS systems completely, depending on local codes and the nature of the maintenance or repair. 5 Q4 Q3 6 31 12 B 13 14