GE Industrial Solutions GE Zenith Series DPB - Manual (Page 36)

28 Installation & Operation Manual, GE Series DPB Busway
March 25, 2013, Rev 0 GE Confidential
Series DPB Busway Installation & Operation Manual
MAINTENANCE
Series DPB Bus Systems ™ require only nominal maintenance. Inspect the busway annually or after any short circuit or
ground fault. Perform the following maintenance procedures:
Carefully inspect all the system. Verify that all Splice Cams (See Figure 8 (160-250A) and Figure 15 (400A)) and are properly
installed and in the locked position. Using a thermal scanning device to record the thermal rise of each termination in each end
feed (See Figure 17 (Standard) and 18 (BCMS)). Record this information for comparison for year over year reviews. Changes in
excess of 5°C should be inspected more carefully; however the monitoring of more than 5 degrees could be due to change on
the loads and not the performance of the busway components.
Check the torque on all power connections using a torque wrench. The tightening torque is specified on the label found in
the End Feed Box (See Figures 17 & 18).
If any busrails, splices, end feed terminations or tap off box contacts are badly discolored, corroded or pitted the devices
must be replaced with new devices.
Ensure that all mechanisms and mechanical interlocks are in satisfactory operational condition.
Check the insulation resistance before re-energizing the busway. Keep a permanent record of resistance readings. Conduct
the insulation resistance test according to the section "Before Enegizing the Busway Checklist".
Energize the equipment again following the instructions in the section "Energizing the Busway System".
After performing all the above inspections and necessary repairs, it may be desirable to perform an infrared temperature
test on all the electrical connections. Conduct this test after the busway is re-energized and reaches a stabilized operating
temperature.
For additional maintenance services please see Appendix H: Service.