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Operating Instructions
31
Trouble Recovery
While failures are extremely unlikely, this system has been designed to allow restart from any system
configuration once the fault has been corrected. Refer to 1.5.5 - Modes of Operation for a descrip-
tion of the operating modes.
4.2.12 Isolation for Maintenance
See Figure 8.
Once the critical loads are transferred to the desired UPS, the maintenance bypass circuit breakers
and isolation circuit breakers may be operated. The details of these isolation/maintenance operations
are dependent on the specific arrangement of your switchboards. Typically, to assist maintenance
personnel, maintenance circuit breaker operation is further guided by an electrical or electromechan-
ical interlock system.
For detailed instructions for use of the maintenance bypass switchboard, refer to the Operation and
Maintenance Manual for your Liebert Series 610 UPS.