5
1VAL050601-MB Rev C
SAFE PRACTICES:
AMVAC™ circuit breakers are equipped with high energy electrical storage capacitors. The design includes several
interlocks and safety features which help ensure safe and proper operating sequences. To ensure safety of
personnel associated with installation, operation, removal, and maintenance of these circuit breakers, the following
recommendations must be followed:
Only qualified persons, as defined in the National Electric Safety Code, who are familiar with the installation and
maintenance of medium voltage circuits and equipment should be permitted to work on these circuit breakers.
Read these instructions carefully before attempting any installation, operation, or maintenance of these power circuit
breakers.
DO NOT work on an energized circuit breaker.
DO NOT work on a circuit breaker unless all components are disconnected by means of a visible break and
securely grounded.
DO NOT work on a circuit breaker with power supplied to the secondary control circuit.
DO NOT defeat safety interlocks. This may result in bodily injury, death and/or equipment damage.
DO NOT work on a closed circuit breaker.
DO NOT work on a circuit breaker with charged energy (springs, capacitors, etc.).
DO NOT use a circuit breaker by itself as the sole means of isolating a medium or high voltage circuit.
DO NOT leave a circuit breaker in an intermediate position in a cell. Always place the circuit breaker in the
Disconnect, Test or Connect position without hesitation between positions.
THE CIRCUIT BREAKERS DESCRIBED IN THIS BOOK ARE DESIGNED AND TESTED TO OPERATE
WITHIN THEIR NAMEPLATED RATING. OPERATION OUTSIDE OF THESE RATINGS MAY CAUSE THE
EQUIPMENT TO FAIL, RESULTING IN PROPERTY DAMAGE, BODILY INJURY AND/OR DEATH.
ALL ANSI AND NEC SAFETY CODES, SAFETY STANDARDS AND/OR REGULATIONS AS THEY MAY BE
APPLIED TO THIS TYPE OF EQUIPMENT MUST BE ADHERED TO STRICTLY.
WARNING
INTRODUCTION:
The purpose of this manual is to provide instructions for unpacking, storage, installation, operation, and maintenance
for AMVAC™ vacuum circuit breakers. This manual should be carefully read and used as a guide during
installation, initial operation, and maintenance.
The specific ratings of each model circuit breaker are listed on the individual nameplates. The AMVAC™ circuit
breakers are protective devices. As such, they are maximum rated devices. Therefore under no circumstances
should they be applied outside of their nameplate ratings. Refer to ANSI and IEEE guidelines referring to the use of
circuit breaker applications.
NOTICE
FAILURE TO OBSERVE THE REQUIREMENTS OF OSHA STANDARD 1910.269 CAN CAUSE DEATH OR
SEVERE BURNS AND DISFIGUREMENT. THIS STANDARD SPECIFICALLY PROHIBITS THE WEARING OF
POLYESTER, ACETATE, NYLON, OR RAYON CLOTHING BY EMPLOYEES WORKING WITH EXPOSURE TO
ELECTRIC ARCS OR FLAMES.
INTRODUCTION & SAFE PRACTICES
Provided by Northeast Power Systems, Inc. (NEPSI)
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