Eaton COOPER POWER SERIES Installation, Operation And Maintenance Instructions

Also see for COOPER POWER SERIES: Installation and operation instructions Installation instructions Installation instructions Installation and operation instructions Operation instructions

Eaton COOPER POWER SERIES Installation, Operation And Maintenance Instructions Manual pdf 15 page image

Removal from serviceotee:N Before removing a regulator from service, you mustreturn the regulator to neutral. Only a regulator inthe neutral position can be safely removed fromservice without interrupting load continuity. It isrecommended to use at least four methods toconfirm the neutral position, as specified in step 2,below.DANGERExplosion Hazard During bypass switching, theregulator must be in the neutral position Prior tobypass switchinge: 1) The regulator must be placed inthe neutral position; 2) Tap-changer operation must bedisabled during the bypass switching If the regulatoris not in the neutral position, part of the series windingwill be shorted when the bypass switch is closed,resulting in high circulating current Failure to complywill result in death or severe personal injury andequipment damageWARNINGExplosion Hazard Bypass a regulator with the lineenergized only if the position indicator, the neutrallight, and the control tap position indicate neutral andthe voltage measured between the source and theload bushings using an approved voltmeter is zero Ifall indications of neutral do not agree, the line shouldbe de-energized to avoid shorting part of the serieswinding and resultant high circulating current Failureto comply can result in death or personal injury andequipment damageWARNINGExplosion Hazard To ensure a complete tappingoperation when returning the tap-changer to the neutralposition, the CONTROL FUNCTION switch must beplaced in the OFF position before the POWER switch isplaced in the OFF position Failure to comply can resultin the tap-changer stepping off of neutral immediatelyupon being energized which can result in death orsevere personal injury and equipment damageTo remove a regulator from service:1. Use the Raise/Lower switch to bring the regulator toneutral position.otee:N When in neutral, the Neutral light will becontinuously and brightly lit on the control frontpanel and the position indicator will point to zeroor N for Neutral.2. Verify the neutral position of the regulator using each ofthese four methods:a. Verify that the neutral indicator light on thecontrol is indicating the neutral position. Neutral isindicated only when the light is continuously andbrightly illuminated.b. Verify that the tap position on the control indicatesneutral by using the Metering-PLUS™ key orFC 12. When in neutral, these display “0” (zero).c. Verify that the position indicator on the regulatoris pointing straight up, either to zero or to “N” forNeutral.d. Using an approved voltmeter, verify that there isno voltage difference between the source and loadbushings.otee:N Do not proceed to step 3 until you haveconfirmed that the regulator is in the Neutralposition using all four methods listed above.WARNINGExplosion Hazard After placing the regulator inthe neutral position for bypass switching, alwaysdisable the motor to prevent a tap change duringbypassing which can result in the tap-changerstepping off of neutral Failure to comply can causedeath or severe personal injury and equipmentdamage3. Disable the tap-changer motor to ensure that thetap-changer cannot inadvertently switch to anoff-neutral position:a. Place the CONTROL FUNCTION switch in the OFFposition.b. Remove the motor fuse.c. Place control POWER switch in the OFF position.d. Open V1 knife switch (and V6 if present) locatedon control back panel.otee:N Do not proceed to step 4 until you have disabledthe tap-changer motor as directed above.4. De-energize the regulator:a. Close the bypass switch.b. Open the load (L) disconnect switch.c. Open the source (S) disconnect switch.d. Open the source-load (SL) disconnect switch, ifavailable.otee:N If a regulator bypass disconnect is used in placeof three separate switches, step a, step b, andstep c are carried out in one operation.11VR-32 Voltage Regulator with Quik-Drive™ Tap-ChangerInstallatIon, operatIon, and MaIntenance InstructIons MN225008EN February 2017