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COOPER POWER

SERIES

Distribution

Transformers

MN202001EN

Effective August 2015
Supersedes S210-12-1 August 2013

Three-phase pad-mounted compartmental type transformer

installation and maintenance instructions

Содержание COOPER POWER SERIES

Страница 1: ...ER POWER SERIES Distribution Transformers MN202001EN Effective August 2015 Supersedes S210 12 1 August 2013 Three phase pad mounted compartmental type transformer installation and maintenance instruct...

Страница 2: ...NTRACT BETWEEN THE PARTIES ANY SUCH CONTRACT STATES THE ENTIRE OBLIGATION OF EATON THE CONTENTS OF THIS DOCUMENT SHALL NOT BECOME PART OF OR MODIFY ANY CONTRACT BETWEEN THE PARTIES In no event will Ea...

Страница 3: ...Loadbreak Switches 11 Tap Changer 12 Dual Voltage and Delta Wye Switch 14 Vacuum Fault Interrupter VFI 15 Air Switches Arc Strangler 16 Surge Arresters 17 MAINTENANCE Exterior Maintenance 19 Cabinet I...

Страница 4: ...ions when working around high voltage lines and equipment and support our Safety For Life mission Safety information DANGER Hazardous voltage Contact with hazardous voltage will cause death or severe...

Страница 5: ...er capacity When using a forklift lift with the transformer tank closest to the mast of the forklift since most of the transformer weight is in the tank Pallet mounted equipment may also be moved by c...

Страница 6: ...abinet the installation will not provide the security needed to prevent tampering by the public Add a permanent mortar seal to fill the gaps Pre service inspection exterior New transformers or transfo...

Страница 7: ...e on underside of the tank cover or man hole cover 2 Loose shifted or damaged parts bushings fuse holders etc 3 Broken or loose connections 4 Contaminated insulating liquid sediment or foreign objects...

Страница 8: ...ransformer nameplate Transformer neutrals must be connected to system neutrals Leads and connections that are not used must be insulated from ground and all other leads Livefront transformer connectio...

Страница 9: ...furnished with the transformer Liquid temperature gauge Transformers may be furnished with a temperature gauge as optional equipment to indicate the top liquid temperature in the tank in degrees Cels...

Страница 10: ...sformer Pressure relief device Transformers may have a cover mounted pressure relief device PRD in addition to the faceplate mounted pressure relief valve PRV standard on all three phase pad mounted d...

Страница 11: ...minals following industry accepted safe grounding practices Grounding secondary terminals protects against situations such as a standby generator energizing transformer from the secondary circuit Foll...

Страница 12: ...valve to open valve Hold the valve open for 30 seconds after pressurized air can no longer be heard hissing through the valve 2 Close pressure relief valve and wait 30 seconds 3 Pull pressure relief...

Страница 13: ...from fuse cartridge 1 Use 3 4 inch and 1 2 inch wrenches to remove end plug see Figure 13 2 Use screwdriver or other tool to straighten tulip tip end of fuse link and push fuse link out of fuse cartri...

Страница 14: ...facturer s product literature for maximum interrupting ratings Internal cartridge fuse replacement 1 Verify that tank is grounded De energize transformer from a remote upstream source Ground all bushi...

Страница 15: ...n cause an explosion or fire Use a hotstick to operate transformer loadbreak equipment After operating transformer loadbreak equipment check that voltages at transformer terminals are the expected val...

Страница 16: ...clockwise to loop thru transformer open The transformer is now OPEN and the loop conductor is electrically connected 3 Move index plate between loop thru transformer open and line b only 4 Rotate swit...

Страница 17: ...e handle to desired position and allow pointer to drop into slot of index plate 5 Secure handle in its new position by tightening lock screw through index plate until it bottoms 6 Padlocking may be ac...

Страница 18: ...position as follows 1 Verify that tank is grounded De energize transformer from a remote upstream source Ground all bushings and terminals before operating dual voltage or delta wye switch 2 Back out...

Страница 19: ...Do not operate loadbreak equipment if a fault condition is suspected Doing so can cause an explosion or fire Use a hotstick to operate transformer loadbreak equipment After operating transformer load...

Страница 20: ...erly and that electrical circuit conditions are as expected Before servicing transformer secondary connected equipment verify that all transformer secondary terminals have zero voltage and ground the...

Страница 21: ...blished maximum continuous operating voltage MCOV values The transformer should not be tested impulse or applied potential with the arrester connected If connected during impulse tests the arrester wi...

Страница 22: ...by rotating handle 3 4 to 1 turn after handle has come in contact with seal gland Under oil arrester disconnection during test with out arrester disconnect switch To disconnect arresters without a dis...

Страница 23: ...nt dirt or moisture from entering the opened transformer tank Contamination of the insulating liquid will prevent the transformer from operating properly and may cause serious damage to the transforme...

Страница 24: ...aks Test pressure should not exceed 7 psig Established pressure should be main tained for at least four hours to insure that all seals are proper 4 Re install the nutguard using 25 ft lbs torque to ti...

Страница 25: ...t cover weld 10 Thoroughly clean tank cover to help prevent contamination of insulating liquid when removing cover Remove all dirt grease and moisture 11 Remove tank cover from tank Weld on tank cover...

Страница 26: ...ntenance on cabinet 2 Place one 1 4 to 3 8 inch shim directly below faceplate on both sides of tank at points A and A see Figure 28 3 Place one 1 1 2 inch wedge under each side of cabinet at points B...

Страница 27: ...nventional transformer oil mixed with R Temp fluid Conventional transformer oil content of 3 in R Temp fluid lowers the fire point below 300 C Measure the ASTM flash and fire points if the presence of...

Страница 28: ...uld be clean and dry large mouth glass bottles Make sure that the liquid being sampled is representative of the liquid in the unit Sufficient liquid must first be drawn off to ensure that the sample w...

Страница 29: ...y Cleveland Open Cup 2 ASTM D877 Standard Test Method for Dielectric Breakdown Voltage of Insulating Liquids Using Disk Electrodes 3 ASTM D923 Standard Practices for Sampling Electrical Insulating Liq...

Страница 30: ...reported and investigated Annual Cabinet Interior Maintenance Items to Inspect Points to be checked Remedial Action Frequency Gauges and Controls Check for proper operation Repair or replace damaged o...

Страница 31: ...g will achieve a rainbow coloring if a particular terminal is experiencing an over temperature condition Tighten any loose connections immediately Any damage or discoloration that is observed should b...

Страница 32: ...on com cooperpowerseries 2015 Eaton All Rights Reserved Printed in USA Publication No MN202001EN August 2015 For Eaton s Cooper Power series three phase pad mounted transformer product information cal...

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