System Operation: Configuration 13 Interlocks; Maintenance; Short Circuits And Overloads - Tripp Lite SU10KMBPKX Installation And Operation Manual

8. System Operation: Configuration 13 Interlocks

The following user instructions are for a two- or three-circuit breaker MBP configured to be controlled by a 1-interlock, 1-key breaker
interlock system.
Do not operate the "SW2" circuit breaker unless the UPS is in BYPASS mode! Failure to follow the oeprating instructions for this
equipment could result in equipment damage, fire, severe injury or death!
Normal Operation (Online Mode)
The "SW1" UPS AC Input Breaker is closed/on. The Maintenance Bypass Breaker "SW2" breaker is open/off with the interlock locking bolt in
the withdrawn position. The Maintenance Isolation Breaker "SW3" is locked closed/on with the interlock locking bolt in the extended position.
Key A1 is free.
Transfer to Maintenance Bypass
1. Transfer the UPS to the Bypass mode before proceeding.
2. Insert Key A1 into lock.
3. Close/turn on the "SW2" breaker.
4. Turn Key A1 to lock the "SW2" breaker in the closed/on position. Key A1 is now free.
5. Open/turn off the "SW3" breaker.
6. The UPS is now ready for routine maintenance.
7. If further maintenance requires a total shutdown of the UPS and isolation from the input, the "SW1" breaker must be opened/turned off
and the battery supply to the UPS must be disconnected. Refer to your UPS manual for proper shutdown procedures.
Return the UPS and Bypass Switch to Normal Operation
1. If the "SW1" breaker was opened/turned off for maintenance, then follow the UPS manual for proper startup procedures. To restore input
power to the UPS, close/turn on the "SW1" breaker. Make sure the UPS is in Bypass mode before proceeding!
2. Close/turn on the "SW3" breaker.
3. Turn Key A1 to lock the "SW3" breaker in the closed/on position. Key A1 is now free.
4. Open/turn off the SW2 breaker.
5. Transfer the UPS from Bypass mode to Normal Operation (Online Mode).

9. Maintenance

Before installing or maintaining this equipment, it is extremely important to read this manual and be sure that all equipment drawings
and schematics are reviewed and clearly understood. If there are any questions concerning this manual or any of the installation or
maintenance procedures and/or requirements, please contact a Tripp Lite representative before proceeding.
Inspection and maintenance should only be performed on equipment that has been de-energized and electrically isolated, so that no
accidental contact can be made with energized parts.

9.1 Short Circuits and Overloads

Do not attempt to re-energize a circuit breaker after a short circuit or overload until the cause of the event has been identified and
corrected. Failure to correct the cause of the event may result in equipment damage, fire, severe injury or death.
Circuit breakers will normally prevent electrical damage except at the point where the short circuit occurred. High mechanical stress
developed by short circuit currents may cause damage to conductors, insulation or other components. After a fault, thorough inspection of
the entire system must be made to verify that there is no damage.
Circuit breakers which performed the short circuit interruption must be inspected for possible damage. Do not disassemble the breaker or
open the breaker trip unit.
Replace all damaged insulation materials, conductors and circuit breakers. It is recommended that the equipment be hipot tested prior to
being placed back in service.
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