Chapter 7 UPS Operation
94
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seconds. If the total connected loads are less than the total capacity of the rest
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will display ‘Inhibit Output¶1RZWKHWRWDOORDGVZLOOEHHTXDOO\VKDUHGE\WKH
rest of the parallel UPSs.
If the total loads are greater than the total capacity of the rest of the parallel
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setup range). After that, it will be the reserve AC power to supply power to the
FRQQHFWHGORDGVDQGHDFK836¶V/&'ZLOOGLVSOD\µBypass Mode¶
2. Repeat the above-mentioned Step 1 to the rest of the parallel UPSs in order to
let all parallel UPSs run in ‘Bypass Mode¶
7XUQRႇHDFKH[WHUQDOEDWWHU\FDELQHW¶VBattery breaker.
7XUQRႇHDFKSDUDOOHO836¶V5HFWL¿HU,QSXW breaker or switch.
5. (1) Wait about 5 minutes for each DC CAP to discharge, and ensure that each
LCD shows the battery voltage lower than 5V.
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to let its DC CAP to discharge, and ensure that each LCD shows the battery
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¶
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7XUQRQHDFKSDUDOOHO836¶VManual Bypass breaker or switch. The connected
loads will be power-supplied by the manual bypass and each LCD will display
‘Manual Bypass ON¶
7XUQRႇHDFKSDUDOOHO836¶VUPS Output breaker or switch and Reserve Input
breaker or switch.
8. Disconnect all fuses. After that, each LCD will be OFF.
9. When each UPS is running in Manual Bypass Mode, there is no high voltage
inside any UPS except the wiring terminals and Manual Bypass breaker or
VZLWFK'RQRWWRXFKDQ\836¶VZLULQJWHUPLQDOVDQGManual Bypass breaker or
switch during UPS maintenance process to avoid electric shock.
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