Maintenance Bypass Setup Procedures - Mitsubishi Electric 1100B Series Owner Technical Manual

3.7 MAINTENANCE BYPASS SETUP PROCEDURES

!
NOTE: Consult MITSUBISHI ELECTRIC POWER PRODUCTS, INC for an
External Maintenance Bypass Panel at 1-800-887-7830.
NOTE
A) Load transfer from inverter to external maintenance bypass
On the LCD panel, press the "START/STOP" icon to proceed UPS shutdown (note: the
1.
inverter STOP function is inhibited if bypass and inverter are out of sync).
2.
Confirm via the flow diagram on the LCD that the load is fed from the UPS static bypass
line.
3. Close the maintenance bypass circuit breaker in the external maintenance bypass panel
(MBP).
4. Open UPS output circuit breaker in the MBP.
5. Transfer is complete. The load is now powered from the external source. The UPS can be
shutdown.
B) Transfer of load from external maintenance bypass to inverter
1. Verify that the external input circuit breaker is closed.
2. Confirm via the flow diagram on the LCD that the UPS output is fed from the static bypass
line.
3. Close the UPS output circuit breaker in the MBP.
4. Open the Maintenance bypass circuit breaker in the MBP.
On the LCD panel, press the "START/STOP" button to proceed UPS startup (refer to
5.
2.2.1).
6. Transfer is complete. The load now is powered by the inverter.
1100B SERIES UPS
OWNERS / TECHNICAL MANUAL
MITSUBISHI ELECTRIC 1100B SERIES UPS
Page Number:
3-15