Maintenance - ABB AMVAC Installation And Operation Manual

OPERATION, INSTALLATION, AND MAINTENANCE
Stored Energy "READY"
Indicator (2)
Discharged (Lamp OFF)
Discharged (Lamp OFF)
Charged (Lamp ON)
Charged (Lamp ON)
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.
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
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.
Table 2: Operations
Mechanism (10)
Open
Closed
Open
Closed
Maintenance Schedule
1VAL050601-MB Rev C
Operations Available
None Available
Open
Close-Open
Open-Close-Open
of the breaker is required.
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