Eaton VCP-W Series Instructions For Installation/operation/maintenance/servicing

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

Contents

35Instruction Booklet IB131006ENEffective March 2019Instructions for installation,operation, and maintenance of typeVCP-W vacuum circuit breakersEATON www.eaton.comFigure 16. Pulling secondary disconnect cage to engage second-aries in TEST position (old version shown). New version willhave BPI pan with automatic secondaries.Figure 17. Engaging levering-in crank.Levering interlockIf the breaker is closed in the TEST position, then as the levering-incrank is pushed in to gain access to the hex drive nut on the leveringsystem the breaker will trip Open automatically.If the circuit breaker is closed as the levering-in crank is engaged tomove the circuit breaker from the CONNECTED to the TEST posi-tion, the circuit breaker will do one of the following.1. BPI pan assembly (Figure 12): If the breaker is closed in theCONNECTED position, then as levering-in crank is pushed into gain access to the hex drive nut on the levering system thebreaker will trip Open automatically.2. Non-BPI pan assembly (Figure 13): If the breaker is closed inthe CONNECTED position, then access to the hex drive nut onthe levering system will be denied when pushing in the levering-in crank. The breaker must be opened prior to the leveringoperation being performed.Automatic/manual hybrid secondary (optional - Figure 46): Itwill function the same as the Non-BPI pan assembly above.Positive InterlockBPI pan assembly (Figure 12): The “L” shaped slider interlockthat enables tripping of a closed breaker by pushing in on theslider (item 6) that protects the racking screw. If desired, thecustomer can request the “Z” bracket to be added to the BPIpan assembly if the switchgear design permits it.Non-BPI pan assembly (Figure 13): The “Z” shaped sliderinterlock that prevents a closed breaker from being levered out ofthe cell.Automatic/manual hybrid secondary (optional - Figure 46): Itwill function the same as the Non-BPI pan assembly above dueto the replacement of the “L” bracket with the “Z” bracket.Negative interlockThe negative interlock prevents the circuit breaker from closingbetween the CONNECTED and TEST positions.Position closing interlockThe circuit breaker is prevented from closing automatically when itis moved from the TEST to the CONNECTED position if the closingswitch is maintained during the levering-in operation.Position withdrawal interlockThis interlock prevents the circuit breaker from being withdrawn bypulling unless it is in the DISCONNECT or DISCONNECT/TEST posi-tion.Extension rail interlockThe extension rail interlock prevents the circuit breaker from beingwithdrawn out of its compartment unless the extension rails or thebreaker lifter are properly engaged to the fixed rails, or the lower cellis configured for a direct roll-in-breaker.Overall system interlock checkThe correct operation of provided interlocks should be confirmed.Keep in mind that an interfacing check is made with a compatiblestructure. As such, the instructions provided here may overlapwith the instructions provided with the assembly. In any case, allprovided interlocks should be confirmed. Review paragraph 4.8.1before proceeding if additional instructions are needed on insertionand removal of a circuit breaker.At the conclusion of the operations check as described in paragraph4.8.2, the circuit breaker was closed in the TEST position with itssprings charged. Perform one of the following depending on theslider interlock (also called positive interlock) style.BPI pan assembly:Engage the levering-in crank and the circuit breaker will automaticallytrip and the MOC switches will operate if the circuit breaker cell isequipped with MOC switches designed to operate in the TEST posi-tion.Lever the circuit breaker towards the CONNECTED position. Asthe circuit breaker moves, protective compartment shutters willautomatically begin to open uncovering fixed primary contacts.