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Toshiba 4400 Series Installation And Operation Manual page 108

Three phase - 15/20/25/30/50/80/100 kva
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13.2
UPS Operation with Internal MBS
Initial UPS Startup
Same as Standard UPS procedure.
Switch Internal MBS to UPS Online Mode
1.
Close CB1 (UPS Input Breaker).
2.
Turn UPS ON. Verify UPS is in Bypass.
3.
Turn ON all UPS Battery DC breakers.
4.
Unlock CB3.
5.
Close CB3 (UPS Output Breaker)
6.
Remove the key from CB3, and insert it in CB2.
7.
Open CB2 (Maintenance Bypass Breaker)
8.
Lock CB2.
9.
Return UPS to Online Mode.
Switch Internal MBS to Maintenance Bypass Mode
1.
Transfer the UPS to static bypass. Verify UPS is in Bypass.
2.
Unlock CB2.
3.
Close CB2 (Maintenance Bypass Breaker)
4.
Open CB3 (UPS Output Breaker)
5.
Remove the key from CB2, and insert it in CB3.
6.
Lock CB3.
7.
Open CB1.(UPS Input Breaker).
Start the UPS with Internal MBS
Make sure all Breakers are open, and all input/output cables are properly connected and installed.
1.
Energize Input Source.
2.
Close CB2 (Maintenance Bypass Breaker). Output to load is now being supplied by the internal MBS.
3.
Close CB1 (UPS Input Breaker) on the inside front of the UPS.
4.
Verify that the AC Input LED on the front panel lights green. All LED's on the front panel may light for a moment when
the input breaker is turned on. This is normal. Verify UPS is in Bypass.
5.
If the UPS is equipped with an External Battery Cabinet, switch the cabinet breaker ON.
6.
Unlock CB3 (UPS Output Breaker)
7.
Close CB3.
8.
Remove the key from CB3, and insert it in CB2.
9.
Open CB2 (Maintenance Bypass Breaker)
10.
Lock CB2.
When running the UPS for the first time or after the power failure backup operation, charge
the battery cabinet batteries, if any, for at least 24 hours (input breaker on) before operating
the connected load.
Using the UPS without charging the battery shortens the battery backup operation time, which
may result in the loss of data in case of a power failure.
98
NOTICE
4400 Series Installation and Operation Manual – 64527-008

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