Operating instructions

Maintenance 31
3.0 M
AINTENANCE
Minimal periodic maintenance of the Static Switch is required. As with all electrical distribution
components, the system should be regularly inspected for electrical connection integrity, signs of
excessive temperatures, dirt accumulation, and proper system operation.
Unless otherwise labeled, the recommended tightening torque for all nut and bolts is as shown
below.
The Static Switch includes comprehensive system alarms and fault detection to identify opera-
tional problems. To increase the degree of confidence of proper system operation, periodic transfer
tests can be easily performed. See Source Transfer/Preferred Source Select in 2.5 - Operat-
ing Guidelines.
The Static Switch is equipped with integral transient voltage surge suppressors (TVSS). In areas
of high transient or overvoltage activity, TVSS should be inspected periodically and replaced as
needed. The TVSS modules are furnished with status lights which indicate the integrity of the
module.
Even the most reliable equipment can fail. Contact your local Liebert representative or Liebert
Global Services for assistance. In the U.S., Liebert Global Services is available to assure fast
repair of your unit with minimal downtime. Liebert Global Services offers a complete range of
start-up services, repair services, preventive maintenance plans, and service contracts.
To contact Liebert Global Services for information or repair service in the United States, call
1-800-LIEBERT.
!
WARNING
ONLY QUALIFIED SERVICE PERSONNEL SHOULD PERFORM
MAINTENANCE ON THE STATIC SWITCH.
LETHAL VOLTAGES EXIST INSIDE THE UNIT DURING
NORMAL OPERATION.
THE UNIT IS SUPPLIED BY MULTIPLE AC POWER SOURCES.
DISCONNECT AND LOCK-OUT ALL POWER SOURCES BEFORE
WORKING INSIDE UNIT.
Shaft Size Grade 2 Standard
Electrical Connections with
Belleville Washers
In. Lb.-In. N-M Lb.-In. N-M
#10 17 3 35 4
1/4 53 6 80 9.0
5/16 107 12 180 20.4
3/8 192 22 240 27.1
1/2 428 48 480 54.3