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. 32-255-1GPage 24Effective 12/02DO NOT PLACE THE CIRCUIT BREAKER IN ITSCOMPARTMENT WITHOUT THE PHASE BARRIERSIN PLACE. THE ABSENCE OF THE BARRIERSCOULD CAUSE A CATASTROHIC FAILURE DURINGINTERRUPTION OR OPERATION RESULTING INDEATH, SEVERE PERSONAL INJURY AND/ORPROPERTY DAMAGE.The multiple finger primary disconnect contacts are sil-ver plated and waxed. In order to provide visual indica-tion of the presence of wax, a blue dye is added duringthe waxing process to give a bluish color to the discon-nect contacts. The wax acts as a conductive lubricantwithout attracting dirt. For this reason the contacts donot require any additional lubricant.5-3 STORED ENERGY MECHANISMKEEP HANDS AND FINGERS AWAY FROM THE CIR-CUIT BREAKER’S INTERNAL PARTS WHILE THECIRCUIT BREAKER CONTACTS ARE CLOSED ORTHE CLOSING SPRINGS ARE CHARGED. THE CIR-CUIT BREAKER CONTACTS MAY OPEN OR THECLOSING SPRINGS DISCHARGE CAUSING ACRUSHING INJURY. DISCHARGE THE SPRINGSAND OPEN THE CIRCUIT BREAKERS BEFORE PER-FORMING ANY CIRCUIT BREAKER MAINTENANCE,INSPECTION OR REPAIR.The spring stored energy operating mechanism isarranged vertically in front of all VCP-W circuit breakers(Figure 3-3). It includes all the elements for storing theenergy, closing and tripping of the circuit breaker, aswell as manual and electrical controls. The manual con-trols are all front accessible. Motion to close and openthe interrupter contacts is provided through operatingrods connecting the mechanism pole shaft to the bellcranks of the interrupter assemblies.5-3.1 OPERATION OF STORED ENERGYMECHANISMThe mechanism stores the closing energy by chargingthe closing springs. The mechanism may rest in any oneof the four positions shown in Figure 5-3 and as follows:Table 5.1 VCP-W Circuit Breaker Barrier Configurations! WARNINGApproximateANSI VacuumBreaker Interrupter NumberIdentification Amps Diameter-Inches of Barriers50VCPW-ND250 1200 4 050VCP-W250 1200 4 22000 5 43000 7 2 + 2 in cell50VCP-W350 1200 7 or 5 2 + 2 in cell2000 7 or 5 2 + 2 in cell3000 7 2 + 2 in cell75VCP-W500 1200 5 or 4 4 or 22000 5 43000 7 2 + 2 in cell150VCP-W500 1200 4 or 3 22000 5 43000 7 2 +2 in cell150VCP-W750 1200 4 22000 5 43000 7 2 + 2 in cell150VCP-W1000 1200 7 or 5 2 + 2 in cell2000 7 or 5 2 + 2 in cell3000 7 2 + 2 in cell150VCP-W63 1200 7 2 + 2 in cell2000 7 2 + 2 in cell3000 7 2 + 2 in cell270VCP-W 630 4 2 + 2 in cell1200 4 or 5 2 + 2 in cell2000 5 2 + 2 in cellNumber of Barriers — Key2..........................Two phase-to-ground barriers on the breaker.4..........................Two phase-to-ground and two phase-to-phase barri-ers on the breaker.2 + 2 in cell..........A group of two or two separate barriers on thebreaker and two exterior barriers mounted on thesides of the cell.Note: Although only standard ANSI rated VCP-W breakers aregiven in these configurations, all VCPW-SE and IEC ratedbreakers follow the same barrier configurations based onthe diameter of the vacuum interrupter.! WARNING