Eaton Cooper Power Series Installation, Operation And Maintenance Manual

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

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Eaton Cooper Power Series Installation, Operation And Maintenance Manual Manual pdf 27 page image

Programming and reconfiguring for different voltagesystemsReconfiguring a voltage regulator for a new system voltagerequires more than just programming the control. Systemvoltage changes will require control programming, ratiocorrection transformer (RCT) connection changes andin some cases, a change in the control winding (PT) tapconnection inside the regulator tank through the hand-holecover.Refer to the regulator nameplate voltage chart forinformation on programming and reconfiguring the regulator.The Internal PT Ratio, RCT connection and Overall PT Ratiocan be found for common system Load Voltages. If thedesired system voltage is not show on the nameplate, referto Allowable system voltages and calculation of overallPT ratio in this section of this manual. Instructions forsetting Regulator Configuration (FC 41) can be found in theDetermination of leading or lagging in delta-connectedregulators in this section of this manual.WARNINGExplosion 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 loadbushings using an approved voltmeter is zero If bothneutral indicators do not indicate neutral or there is avoltage between the source and load bushings, the lineshould be de-energized to avoid shorting part of theseries winding and resultant high circulating currentFailure to comply can result in death or personal injuryand equipment damage VR-T206 1Steps for changing system voltage1. Remove the nameplates from the unit and move thepins to the desired Load Volts.2. Refer to the nameplate; if the Control Winding Tapsmust be changed the voltage regulator must bede-energize. Refer to the section Removal fromService in document MN225008EN VR-32 VoltageRegulator with Quik-Drive Tap-Changer Installation,Operation and Maintenance Instructions for detailedinstructions.3. Open the hand-hole cover and reconfigure the controlwinding connections on the terminal board on top ofthe tap changer.a. Move the PT tap connection (E tap) to the correctposition. The terminal is bladed and should easily pulloff and then slide onto the new connection point (E1,E2 or E3).b. If the regulator is equipped with an internal differentialPT (IDPT) there will be a reference to a P tap on thenameplate for the control winding tap. Reconnect theP tap as required (P1, P2 or P3).4. Replace and secure the hand-hole cover.RCT Adjustment WireFigure 14 Ratio correction transformer showing wire forvoltage adjustment5. The control should be powered down for the next step.To do so:a. Move the CONTROL FUNCTION switch to OFFb. Move the POWER switch to OFF.c. On the back panel, Open the V1 and V6 (if present)switches and close the C switch (see Figure 14).6. Connect the RCT as required for the desired systemvoltage.a. Standard Short Back Panel – Move the single blackwire connected below TB3 to the correct RCTconnection point (see Figure 14)b. Full Back Panel – Move the looped tagged black wireconnected on the left side of the RCT terminal board.c. IDPT RCT – If there is a second RCT for the IDPT,move the looped tagged white/brown wire connectedon the left side of the RCT2 terminal board.7. Power the control for programming:a. Internal Power – If the regulator is connected tosystem power, close the V1 and V6 (if present)switches and open the C switch and move thePOWER switch to INTERNAL.b. External Power – Refer to Section 1: Control FrontPanel: Connecting power to external sourceterminals for detailed instructions on applyingpower to the external source terminals. Once powerhas been connected, move the POWER switch toINTERNAL.21INSTALLATION, OPERATION, AND MAINTENANCE INSTRUCTIONS MN225003EN April 2018CL-7 Voltage Regulator Control