Eaton 380 VCP-W 16 Instructions For Installation, Operation And Maintenance

Also see for 380 VCP-W 21: Instructions for installation, operation and maintenance

Contents

Page 20 I.B. 3A74792H08Effective 0 9 / 2 0 144-8.2 OPERATION CHECK PERFORMANCEMove the VCP-W circuit breaker to the TEST positionand engage the secondary contacts following theprocedure described in Paragraph 4-8.1. As soon ascontrol power becomes available, the motor will chargethe closing springs with this condition indicated by aSpring Charged/Discharged Indicator on the front of thecircuit breaker (Figure 3-8). In addition, the status of themain contacts, open or closed, is indicated on the front ofthe circuit breaker.Using the close and trip buttons on the front of thecircuit breaker, close and trip the circuit breaker severaltimes to verify the closing and tripping operations.Conclude the check by closing the circuit breaker.The VCP-WR fixed circuit breaker can be checked in asimilar fashion as long as the circuit breaker is isolatedwith no primary power present. The operationperformance can be conducted as long as secondarycontrol power is present.4-9 BREAKER/STRUCTURE INTERFACINGType VCP-W Vacuum Circuit Breakers are supplied with aseries of interlocks to insure safe and proper interfacingbetween the circuit breaker and a compatible structurecompartment. The specific interlocks are described in thenext paragraph to provide the proper familiarization.Once the interlocks are reviewed, an interfacing checkcan be performed as described in Paragraph 4-9.2.4-9.1 INTERFACE INTERLOCKSEach circuit breaker is supplied with the following inter-locks to insure safe and proper operation (Figure 4-2):Code Plates (VCP-W Only)Code plates are mounted at the bottom of the circuitbreaker to prevent the insertion of a circuit breaker into astructure of higher power rating. A set of two code plateson the circuit breaker and two in the compartment formthis interlock.NOTICECode plates do not block out control voltage orscheme incompatibility.Close and Trip Floor TrippersMounted on the bottom of the circuit breaker, theseinterlocks interface with compatible structureinterlocks to render the circuit breaker mechanismmechanically and electrically trip free during thelevering process.Anti-Close InterlockThis interlock prevents releasing the closing springselectrically or manually if the circuit breaker is alreadyclosed (Figure 5-5). On a closed circuit breaker, theinterlock lever moves toward the rear. In this position,the movement of the spring release clapper does notlift the lever and thus the spring release latch cannotbe moved.4-9.2 DRAWOUT BREAKER INTERFACINGCHECK (VCP-W)Keep in mind that an interfacing check will be madewith a compatible structure. As such, the instructionsprovided with the assembly will suggest otherinterfacing conditions that should be observed and/orchecked, such as primary shutter operation,MOC/TOC operation and levering handle insertion. Acomplete, coordinated inter-face check, therefore, willbe a blend of the circuit breaker instructions andthose provided with the structural assembly. Togetherall required standards are met and the ultimate insafety is achieved.Insert the circuit breaker into the structure and leverit into and out of each different position by followingthe procedures described in Paragraph 4-8.1.When the secondary contacts are manually engagedin the TEST position, the motor will charge the closingsprings. Close the circuit breaker. Attempt to engagethe levering crank to begin moving the circuit breakerto the CONNECTED position. It will first be noticedthat the levering crank cannot be engaged with thebreaker closed. In addition, charged springs will bedischarged as the circuit breaker starts to move.Once in the CONNECTED position, remove thelevering handle, close the circuit breaker and the motorwill begin charging the closing springs if control poweris available. Once again engage the levering handlewhich can only be accomplished with the circuitbreaker open.Lever the circuit breaker toward the TEST position.The circuit breaker will be in a trip-free condition.Continue to lever the circuit breaker all the way to theTEST position and the secondary contacts will bedisengaged, now making it the DISCONNECTposition.