Delta NT Series - Manual Bypass Mode Start-Up Procedures (Parallel)

93
Ultron NT Series
 3UHVVRQHRIWKHSDUDOOHO836V¶µON¶DQGµ
¶EXWWRQVVLPXOWDQHRXVO\IRU
3 seconds. After that, its inverter will start up and its inverter voltage will be
established.
8. Repeat Step 7WRWKHUHVWRIWKHSDUDOOHO836V$IWHUWKHODVWSDUDOOHO836¶V
LQYHUWHUYROWDJHLVHVWDEOLVKHGHDFKSDUDOOHO836¶VFRQWDFWRUZLOODFWLYDWH
 8VHDYROWDJHPHWHUWRPHDVXUHHDFKSDUDOOHO836¶VRXWSXWYROWDJHSHUSKDVH
The output voltage difference must be lower than 5V. If normal, turn on each
XQLW¶VUPS Output breaker or switch.
1RZWKHWRWDOORDGVZLOOEHHTXDOO\VKDUHGE\WKHSDUDOOHO836VDQGHDFK/&'
will display ‘Backup Mode¶
7.2.7 Manual Bypass Mode Start-up Procedures (Parallel)
NOTE :
 5HJXODU836PDLQWHQDQFHDWDIUHTXHQF\RIHYHU\KDOI\HDULVVXJJHVWHG
2. Before executing the following procedures, please refer to 7.1 Pre Start-
XS3UH7XUQR௺:DUQLQJV¿UVW
)RUSDUDOOHODSSOLFDWLRQHDFKSDUDOOHO836¶VManual Bypass breaker or switch can
only be turned ON for UPS maintenance, which ensures that the power supplying to
WKHFRQQHFWHGORDGVZRQ¶WEHLQWHUUXSWHGGXULQJPDLQWHQDQFHSURFHVV
,IHDFKSDUDOOHO836¶VManual Bypass breaker or switch is turned ON in Normal
ModeHDFKSDUDOOHO836¶VLQYHUWHUZLOOEHWXUQHGOFF, the connected critical loads
ZLOOEHSRZHUVXSSOLHGE\WKHPDQXDOE\SDVVDQGWKHRXWSXWZRQ¶WEHSURWHFWHG
Please ensure that the reserve AC power is normal.
7.2.7.1 From Normal Mode to Manual Bypass Mode (Parallel)
WARNING:
If you perform the following turn-off procedures to each parallel UPS, all
power supplying to the UPS will be completely cut off. Please make sure
the critical loads connected to the UPS have already been safely shut down
EHIRUH\RXSHUIRUPWKHWXUQRႇSURFHGXUHV