19
1VAL050601-MB Rev C
M
AINTENANCE
:
The mechanism requires visual inspection of hardware, lubrication and operation during routine inspection.
Before beginning any maintenance, remove the control power, and initiate the discharge of the storage capacitors by
pulling the truck handles inward. Wait at least 10 minutes for the discharge circuit to discharge the storage capacitors
before beginning work on the breaker. Remove the front cover by unfastening the screws and hardware located on the
front of the breaker.
Always lubricate the working surface of the moving parts. Verify lubrication on the connections of the actuator and lever
arm. Remove any grease on the circuit breaker frame. Use Isotopaz grease for lubrication If the grease becomes
caked and dirty, remove with a clean cloth and reapply lubrication.
Maintenance Schedule
Establishing a periodic maintenance and inspection schedule are critical to ensure a safe, reliable operating AMVAC
circuit breaker. Although the magnetically actuated operating mechanism of the AMVAC circuit breaker is maintenance
free, visual inspection and maintenance on other components is required.
The servicing interval and their aim depend on the environmental conditions and frequency of operations along with ex-
perienced fault currents.
AMVAC’s installed in normal indoor climate controlled environment, require a visual inspection every five years or
10,000 normal load operations, whichever comes first.
AMVAC’s installed in contaminated or corrosive environments, or subjected to unusual service conditions, or experi-
ence greater than 2,000 operations per year require inspection and maintenance annually.
Following each interrupted fault, an inspection and primary circuit testing
of the breaker is required.
DO NOT
work on an energized circuit breaker.
DO NOT
work on a circuit breaker unless all of the 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 high voltage circuit.
DO NOT
leave a circuit breaker in an intermediate position in a cell. Always have the circuit breaker in the Disconnect,
Test, or Connect position.
Always lubricate the working surface of the moving parts. Verify lubrication on the connections of the actuator and lever
arm. Remove any grease on the circuit breaker frame. Use Isotopaz grease for lubrication If the grease becomes
caked and dirty, remove with a clean cloth and reapply lubrication.
OPERATION, INSTALLATION, AND MAINTENANCE
Stored Energy “READY”
Indicator (2)
Mechanism (10)
Operations Available
Discharged (Lamp OFF)
Open
None Available
Discharged (Lamp OFF)
Closed
Open
Charged (Lamp ON)
Open
Close-Open
Charged (Lamp ON)
Closed
Open-Close-Open
Table 2: Operations
Provided
by
Northeast
Power
Systems,
Inc.
(NEPSI)
Summary of Contents for AMVAC
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Page 47: ...47 1VAL050601 MB Rev C APPENDIX G Provided by Northeast Power Systems Inc NEPSI ...
Page 49: ...49 1VAL050601 MB Rev C NOTES Provided by Northeast Power Systems Inc NEPSI ...
