Eaton QD5 Manual

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

Contents

Eaton QD5 Manual Manual pdf 5 page image

Product informationIntroductionEaton combines more than 50 years of tap-changerexperience with the latest technology providing the mostadvanced and reliable voltage regulator tap-changer in itsCooper Power series QD5 Quik-Drive™ tap-changer. Eatonprovides the proven value customers have come to expectfrom the leader. By using advanced thermal-set materialrather than Phenolic material Eaton has been able to designin strength to meet the most demanding applications.The design provides for an improved contact alignmentand longer contact life. The QD5 tap-changer incorporatesCooper’s exclusive holding switch circuit, which has set thestandard for tap-changer tracking reliability.The QD5 Quik-Drive tap-changer offers many advancedfeatures when integrated with Eaton's Cooper Power seriesvoltage regulator controls. Applications such as PreventativeMaintenances Tapping (PMT™), Duty Cycle Monitor (DCM),and Time–ON-TAP™ features enables the unique capabilityto monitoring factors that affect tap-changer life.Read this manual firstThese instructions apply to distribution voltage regulatorsequipped with the QD5 tap-changer. Read these instructionscarefully before attempting maintenance on the voltageregulator.The equipment covered by these instructions should beoperated and serviced only by competent personnel familiarwith good safety practices. These instructions are writtenfor such personnel and are not intended as a substitute foradequate training and experience in safe procedures for thistype of equipment.The text of this instruction includes information concerninghazards to safety, which are common to all regulators.This safety hazard information is offered for guidancewhen installing and operating the descriptive matter toaid in preventing damage to the equipment and to adviseof possible hazards to personnel. When reading this text,the meaning and content of these statements should beunderstood and followed carefully.StandardsISO 9001 Certified Quality Management SystemGeneralService Information MN225012EN covers operating,maintenance and component replacement instructions forthe QD5 Quik-Drive tap-changer in Eaton's Cooper Powerseries VR-32 voltage regulators. The QD5 tap-changerin 2003 replaced the 770 Direct Drive tap-changers forlow current application single-phase voltage regulators.Replacing the medium direct drive model 770, 150 kV BIL,the QD5 tap-changer like the 770 direct drive tap-changerare used on voltage regulators with a load rating up to 328Amps. In 2007, the original Phenolic contact board design ofthe QD5 was replace by thermal-set material.MotorThe motors for the QD5 Quik-Drive tap-changer arepermanent split capacitor type suitable for operation in bothdirections of rotation at 120 Vac, single-phase, 50/60 Hz. Allcomponents are compatible with hot transformer oil andwindings are oil cooled. The motor will carry locked–rotorcurrent for at least 3000 hours.Motor resistanceTo measure the motor resistance of each motor directionalwinding, see the following:Motor Ground “White Lead” to“Blue Lead” Raise = 7.2 ohmsMotor Ground “ White Lead” to ”Red Lead” Lower = 7.2 ohmsRaise “Blue Lead” to Lower“Red Lead” = 13.9 ohmsFigure 1. Motor.1QD5 QUIK-DRIVE TAP-CHANGER INSTALLATION AND MAINTENANCE INSTRUCTIONS MN225012EN March 2016CAUTIONDo not operate the motor in air for excessive periods oftime or overheating and failure may result.