SBS-800 Series Operator & Planned Maintenance Handbook
Chapter 9
: Planned Maintenance
KH-1601-2 Issue 6
Page 70 of 80
9.4
Earth Bonding Maintenance
Where an earth/chassis bonding point has been found to be corroded or fails a conductivity test, the
bonding joint should be dismantled, cleaned and reassembled as follows:
CAUTION
ISOLATE THE SYSTEM BEFORE COMMENCING THIS TASK.
Under no circumstances should straps or equipment be disconnected from earth/chassis before all
power supplies including UPS supplies are isolated at source.
EARTH BONDING CLEANING PROCEDURE:
Fully isolate the equipment from the single and 3-phase AC power supplies.
Release the nuts/bolts securing the equipment/straps.
Clean the affected parts with a wire brush or emery cloth to provide bright metal surfaces.
Refit the equipment/straps and tighten all nuts/bolts.
Carry out a continuity check in accordance with the appropriate maintenance procedure.
If the test is satisfactory, restore the equipment power supplies and test the system.
RDU M6 grounding/earth stud
SBS-800 Gearbox grounding strap
