Powerware 30-160kVA - Manual (Page 23)

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Powerware 9315 Maintenance Bypass Module 30---160kVA
164201177 Rev. C 041500
Maintenance
Maintenance should be scheduled on a periodic basis, recommended not to
exceed one year. More frequent intervals are recommended if the equipment is
subjected to highly repetitive operations.
CAUTION:
Refer to Section 9 -- Maintaining the UPS System of the Powerware 9315
30--160kVA Operation manual, Powerware part number 164200252, before
beginning maintenance or repairs on the UPS equipment.
WARNING:
Dangerous and life-threatening voltages are present when the UPS is
operating. De-energize all equipment before physically touching potentially
live parts.
Periodic inspections of the maintenance bypass module should be made to
determine if components, wiring, and connections exhibit evidence of overheating.
Particular attention should be given to bolted connections. Maintenance
procedures should specify that the bolted connections be retorqued to values
listed on labels posted on the equipment.
CAUTION:
Overtightening of bolted connections containing compression washers
decreases the washer’s ability to maintain compression during heating and
cooling cycles.
Refer to circuit breaker manufacturer’s application and maintenance literature for
recommended maintenance practices and procedures.
Short Circuits
Short circuits are not considered normal phenomena in UPS applications. Tripping
of protective devices due to low impedance short circuits should be thoroughly
investigated for damage to conductors, insulation, and the protective devices in
accordance with the manufacturer’s recommendations.
Maintenance Bypass Module Diagrams
See Appendix A for onelines and system configuration schematics