Maintenance

The Chance M3 disconnect switch should require little maintenance. Following a program of periodic inspection and maintenance will prolong the life of the M3 switch.

•Operate the switch periodically to clean contact surfaces and to free moving parts.

•Check for burned or pitted contacts and replace if necessary.

•Check hinge bolt for looseness, and if loose, torque to 40-in.-lb. and apply Loctite®-271 to bolt threads.

•Inspect all blade rivets for tightness and replace blade if loose.

•Inspect mounting hardware and tighten as needed (12 - 15- ft.lb.)

•Replace any broken or cracked insulators and clean or replace if heavily contaminated.

For additional recommendations, refer to ANSI

C37.35 “IEEE Guide for the Application, Installation,

Operation, and Maintenance of High Voltage Air

Disconnecting and Load Interrupter Switches.”

POWER SYSTEMS, INC.

© Copyright 1996 Hubbell / Chance, 210 N. Allen, Centralia, MO 65240	Printed in USA
4	Part No. P807-0198
	Rev. B 6/96