Eaton 50VCPW-ND250 Installation, Operation And Maintenance Manual

Also see for 120VCP-W25: Instructions for installation/operation/maintenance/servicing Instructions for installation, operation and maintenance

Contents

I.B. 32-255-1G Page 17Effective 12/024-8 ELECTRICAL OPERATION CHECKAfter having completed all previous checks and tests,the circuit breaker is ready to be operated electrically. Itis preferred that this check be made with the circuitbreaker in a TEST position or by using a test cable, ifthe circuit breaker is outside the cell structure.BEFORE INSERTING THE CIRCUIT BREAKER EXAM-INE THE INSIDE OF THE CELL STRUCTURE FOREXCESSIVE DIRT OR ANYTHING THAT MIGHT INTER-FERE WITH THE CIRCUIT BREAKER MOVEMENT.EXTREME CAUTION MUST BE EXERCISED TOINSURE THAT PRIMARY CIRCUITS ARE NOT ENER-GIZED WHILE CHECKS ARE PERFORMED IN THECIRCUIT BREAKER COMPARTMENT. FAILURE TODO SO MAY RESULT IN PERSONAL INJURY ORDEATH.The circuit breaker is normally tested electrically in itscell structure in the TEST position. To achieve the TESTposition, the circuit breaker must first be placed in thecell structure and the secondary contacts engaged. Tocomplete this testing procedure, the operator should firstbe familiar with inserting and removing the circuit break-er into and from the cell structure.4-8.1 CIRCUIT BREAKER INSERTION ANDREMOVALMake certain that the levering nut is all the way for-ward in the TEST position before attempting toinsert a circuit breaker into its compartment (Figure4-2).If the circuit breaker is being inserted into an upper com-partment or will be positioned in a lower compartmentwithout the use of a drawout ramp or dockabledolly, the extension rails must first be put in position.Carefully engage the left and right extension rails to thefixed structure rails and ensure they are properly seatedin place (Figure 4-3). Once the extension rails are prop-erly in place, the circuit breaker can be carefully loadedon the extension rails using an overhead lifter and liftingyoke. Remove the lifting yoke when the circuit breaker issecurely seated on the extension rails.Push the circuit breaker into the compartment until theTEST position is reached as confirmed by a metallicsound of the breaker levering latch engaging the leveringnut (Figures 4-2 and 4-4). Once the circuit breaker is inthe TEST position, the extension rails can be removed.To engage the circuit breaker secondary contacts, raisethe handle to the secondary disconnect cage and pullthe cage forward as far as possible (Figure 4-5). Assoon as control power is available, the motor will startcharging the closing springs.DO NOT USE ANY TOOL OTHER THAN THE LEVER-ING-IN CRANK PROVIDED TO LEVER THE CIRCUITBREAKER FROM TEST OR CONNECTED POSI-TIONS. CORRECT OPERATION OF SOME OF THEINTERLOCKS IS DEPENDENT ON USE OF THEPROVIDED LEVERING CRANK. PERSONAL INJURYOR EQUIPMENT DAMAGE COULD RESULT FROMTHE USE A TOOL OTHER THAN THE PROPER LEV-ERING-IN CRANK.The circuit breaker and integral levering mechanismincludes all necessary interlocks that when inter-faced with a compatible structure will render the cir-cuit breaker mechanism mechanically and electri-cally trip-free during the levering process. For infor-mation pertaining to individual interlocks, refer toparagraph 4-9 in this section.To move the circuit breaker to the CONNECTED posi-tion, engage the levering-in crank with the structuremounted levering shaft (Figure 4-6). Turn the levering-incrank in a clockwise direction and the circuit breaker willmove slowly toward the rear of the structure. When thecircuit breaker reaches the CONNECTED position, it willbecome impossible to continue turning the levering-incrank. The CONNECTED position will also be indicatedby a red flag indicator just below the levering device. If aspin-free levering-in crank is being used, it will spin freeonce the CONNECTED position is reached. Secondarycontacts will automatically engage if not alreadyengaged manually in the TEST position.! WARNING! CAUTION! CAUTIONNOTICENOTICE