Eaton 380 VCP-Wind Instructions For The Use, Operation And Maintenance

Contents

I.B. 70A2580H02 Page 23Effective November 20125. When the circuit breaker closes, the reset lever movesaway from the moving clapper. If the Under-voltageTrip Device coil has at least 85% of the rated voltageapplied, the moving clapper is held to the yoke by themagnetic force, even though the reset lever hasmoved up.5-5 INTERLOCKS AND INTERFACINGRefer to Paragraph 4-9 of this manual for detailedinformation concerning circuit breaker interlocks and theirinterfacing with a switchgear structure compartment. Inaddition, refer to the instruction manual supplied withthe switchgear assembly.5-6 LEVERING MECHANISMThe purpose of the levering mechanism is to move thedrawout VCP-Wind circuit breaker between the TESTposition and the CONNECT position within the assemblystructure. The levering mechanism used to move thecircuit breaker requires minimum effort, and is an integralpart of the circuit breaker assembly.Figure 5-7 38kV VCP-Wind in Breaker Mini Module5-7 OPERATIONS COUNTERAll circuit breakers are equipped with a mechanicaloperations counter. As the circuit breaker opens, thelinkage connected to the pole shaft lever advancesthe counter reading by one (Figure 3-4).5-8 GROUND CONTACTThe ground contact used with the drawout VCP-Windcircuit breaker is an assembly of spring loaded fingersproviding a dis-connectable means for grounding thecircuit breaker chassis, after it has been inserted intoa switchgear structure. The ground contact is locatedon the lower left portion of the truck chassis. Anextension of the switchgear ground bus is secured tothe cell floor in such a position to engage the groundcontact automatically, when the circuit breaker ismoved into the DISCONNECT/TEST position. Itremains engaged in all circuit breaker positions withinthe cell.5-9 MOC AND TOC SWITCH OPERATIONSA MOC operator integral to the circuit breakerengages an operating lever of the MechanismOperated Cell Switch (MOC) integral to the circuitbreaker. This MOC operator permits the contacts ofthe MOC Switch to be correlated with the circuitbreaker’s contact position.The integral mounted Truck Operated Cell Switch(TOC) is operated by movement of the circuit breakertruck into or out of the CONNECT position.