Eaton VacClad-W Instruction Booklet

Also see for VacClad-W: Instructions for installation, operation, maintenance

12Instruction Booklet IB32267ARCEffective December 2010VacClad-W 38 kV arc-resistantswitchgear indoor housingseaton Corporation www.eaton.comFigure 14. Typical VT Compartment (Shown with and withoutVTs Installed)Figure 15. Typical VT Drawer Assembly (Shown Removed)Section 3: adjusting and testing1. After the switchgear has been installed and connected to theapparatus it is to control, give it a final check before it is putinto service (Make sure the apparatus being controlled is notconnected to the system while the tests are being carried out )The testing equipment will depend on the size and the type ofinstallation Use portable voltmeters Use simple devices for“ringing” or “lighting out” circuits2. Examine all wiring circuits to make sure they have not beendamaged or loosened during shipment or installation3. Make sure all the connections are correct before the equipmentis operated “Light out” connections between the switchgearand remote apparatus such as instrument transformers, auxiliaryswitches, and remote control and interlock circuits4. Coordinate the settings of the relays with other parts of thesystem in accordance with the standards or operating practiceof the purchaser5. If the covers are removed from meters, relays, or other devicesfor installation or test, handle them carefully Replace the coversas soon as possible to keep out dust and dirt6. Perform a loading check of the control circuitsBefore energizing the control circuits, check the control buswith an ohmmeter to make sure there are no short circuits inthe control wiring If an ohmmeter is not available, connect asmall fuse in series with the source of the control power Thiswill protect the control wiring against damage (The fuse shouldbe one-fourth the normal rating of the circuit )Section 4: operation of the system1. Study and be sure to understand the diagrams furnished witheach switchgear system2. Install the circuit breaker in the test position Lift and pull forwardsecondary disconnect to engage the control circuit Check thebreaker operations3. A green light on the hinged instrument panel on the front of thebreaker compartment shows the breaker is open A red lightshows the breaker is closed In a D-C control scheme, the redlight supervises the trip coil and indicates the trip coil circuit hascontinuity Refer to diagrams supplied for the switchgear for thecontrol scheme details, indicating light colors, and functions4. The details of the breaker control schemes vary from one instal-lation to another They comply with the requirements set forthby IEEE, NEMA, and ANSI All of the schemes are designed tocoordinate electrically with the mechanical design of the breakerVT CompartmentShuttersVT SecondaryDisconnectGroundConnectionVT DrawerStopViewingWindowVT CompartmentFront Cover (bolted)LeavingAccessVT Compartment Shown WithoutDrawout VTsVT Compartment with VT Drawer andFront Cover InstalledTopMountedFuses