Section 6 Inspection, Maintenance And Troubleshooting; Introduction; Frequency Of Inspection And Maintenance; 6-2.1 Qualified Personnel - Eaton 50VCPW-ND250 Installation, Operation And Maintenance Manual

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SECTION 6: INSPECTION, MAINTENANCE
AND TROUBLESHOOTING

6-1 INTRODUCTION

!
• DO NOT WORK ON A BREAKER ELEMENT WITH
PRIMARY POWER APPLIED.
• DO NOT WORK ON A BREAKER ELEMENT WITH
SECONDARY CONTACTS CONNECTED.
• DO NOT WORK ON A BREAKER ELEMENT WITH
SPRINGS CHARGED OR CONTACTS CLOSED.
• DO NOT DEFEAT ANY SAFETY INTERLOCKS.
• DO NOT LEAVE MAINTENANCE TOOL IN THE
SOCKET AFTER CHARGING THE CLOSING
SPRINGS.
• DO NOT STAND LESS THAN ONE METER AWAY
FROM THE BREAKER ELEMENT WHEN TESTING
FOR VACUUM INTEGRITY.
FAILURE TO FOLLOW ANY OF THESE INSTRUC-
TIONS MAY CAUSE DEATH, SERIOUS BODILY
INJURY, OR PROPERTY DAMAGE. SEE SECTION 2 -
SAFE PRACTICES FOR MORE INFORMATION.
6-2 FREQUENCY OF INSPECTION AND
MAINTENANCE
Periodic inspections and associated maintenance are
essential to the safe and reliable operation of VCP-W
Vacuum Circuit Breaker Elements. The inspection fre-
quency and associated maintenance recommended are
intended to insure the best possible ongoing service. It
is imperative that an established schedule be followed.
To establish an exact schedule for a specific installation,
use the following guidelines:
1. In a clean, non-corrosive environment, inspect and
maintain each circuit breaker element annually or
every 500 operations, which ever comes first.
2. For special conditions such as frequent circuit break-
er element operation, contaminated environments,
and high temperature/humidity conditions, the
inspection frequency should be twice a year.
3. Inspect a circuit breaker element every time it inter-
rupts fault current.
WARNING
4. Follow the steps presented in Paragraph 6-3 entitled
"Inspection and Maintenance Procedures" for sched-
uled programs.
5. Create and maintain a dated permanent record of all
inspections, maintenance performed, actions taken,
observations made, and measurements taken. Not
only will this provide valuable historical information, it
can help to establish whether or not the present
schedule needs to be adjusted.
6. Perform ongoing visual inspections, when possible,
of all equipment on a regular basis. Be alert for an
accumulation of dirt in and around the circuit breaker
elements, loose hardware or discolored insulation.

6-2.1 QUALIFIED PERSONNEL

For the purpose of operating this type of equipment,
only individuals thoroughly trained in the operation of
power circuit breakers and associated equipment, and
having knowledge of connected loads may be consid-
ered to be qualified. Refer to further definitions in the
National Electrical Safety Code.
For the purpose of inspecting and maintaining such
equipment, a qualified person must also be trained in
regard to the hazards inherent to working with electricity
and the proper way to perform such work. Such an indi-
vidual should be able to de-energize, clear and tag cir-
cuits in accordance with established safety practices. In
addition, these individuals should have access to and be
trained in the use of protective equipment, such as rub-
ber gloves and flash clothes.
All personnel should be familiar with and understand the
material presented in this instruction manual and other
related manuals.

6-2.2 GENERAL TORQUE GUIDELINES

Bolts and screws must be properly torqued. This is espe-
cially true if parts and/or accessories are added or
replaced. Table 6.1 provides guidelines on torque levels.
The table is intended as a general guideline and should
be applied in conjunction with the experience and good
judgment of the individual performing the work.
!
OVER TORQUING CAN CAUSE PERMANENT DAM-
AGE WHILE UNDER TORQUING WILL NOT PRO-
VIDE THE PROPER CLAMPING FORCE AND MAY
EVENTUALLY WORK LOOSE.
I.B. 32-255-1G
CAUTION
Effective 12/02