Eaton NR Installation And Operation Instructions 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 NR Installation And Operation Instructions Manual Manual pdf 7 page image

3Type NR o il s w itch installation a n d o p e r a t ion instru c t ions INSTALLATION AND OPERATION INSTRUCTIONS MN230008EN November 2016Installation procedureWARNINGDo not operate this equipment if energized parts are notimmersed in dielectric fluid Operation when parts arenot properly immersed in dielectric fluid may result ininternal flashovers that will damage the equipment andcan cause death or severe personal injury G104 4CAUTIONThis equipment relies on dielectric fluid to provideelectrical insulation between components The dielectricstrength of the fluid must be checked on a regular basis,as part of the routine maintenance inspection, to ensurethat it is at or above minimum dielectric requirementsUse of this equipment with dielectric fluid that does notmeet minimum requirements can result in internalflashovers that will damage the equipment and cancause personal injury G107 3Check-out procedure1. Untank the switch When untanking the switch forinspection, remove the four bolts that secure the tankand head casting. Trip the switch and carefully lift themechanism.2. Check oil level Before installing the switch, check forproper oil level. With the mechanism removed from thetank, the oil level should be even with the top of thetank liner.3. Test oil dielectric strength If the switch has beenstored for some time or is being relocated, perform adielectric test on the oil. Refer to Reference DataTD280022EN, Oil Specifications and Tests for testprocedures and test values. Oil that does not meetspecifications should be replaced. Approximately1-1/2 gallons are required.4. Replace head casting and mechanism in tankA. Wipe clean the O-ring type gasket and the tankgasket seat.B. Place head and mechanism assembly into the tank.The head can be rotated to any position exceptwhere the actuator housing or manual operatinghandle interfere with the tank mounting bracket.C. Position the four head bolts, with fasteners underthe tank lip, and tighten alternately (torque to10 - 14 ft lbs).5. Test mechanical operation CLOSE and OPEN theswitch contacts manually using the yellow operatinghandle. Confirm that the contacts have closed andopened by listening for the sound of operation or by acontinuity check between the switch bushings. Leavethe contacts in the open position.6. Check data plate Make sure that ratings on the dataplate are correct for the planned installation.WARNINGThis equipment is not intended to protect humanlife Follow all locally approved procedures and safetypractices when installing or operating this equipmentFailure to comply can result in death, severe personalinjury, and equipment damage G102 17. Mount the switch The switch can be direct polemounted with a through-bolt. Mounting hardwareis also available for substation and cross-arm polemounting. Dimensions to determine mounting positionand clearances are shown in Figures 5, 6 and 7.Main wiringWARNINGHazardous voltage Solidly ground all equipment Failureto comply can result in death, severe personal injury,and equipment damage T223 21. Ground the switch Make the ground connection tothe ground connector (located 3” from the bottom ofthe tank).2. Make line connections Connect the primary leads tothe switch bushing terminals. The universal clamp typeterminals accommodate No. 8 solid through2/0 stranded conductor.Control wiringConnectionsConnections to the actuating mechanism are made at aterminal strip located in the actuator housing. Wiring accessis through a 1-1/16” diameter opening in the bottom of thehousing. Receptacles are supplied with 5-pin, 3-conductoror 6-pin, 6-conductor configurations as standard fromthe factory.The terminal strip is factory wired to an accessoryreceptacle mounted in the bottom of the housing. Wiringand receptacle combinations are available to accommodatevarious combinations of accessories. Mating plugs forthe accessory receptacles must be ordered separately.Maximum cable and wire sizes accommodated by the plugsare tabulated in Table 3.Pin orientation diagrams for the accessory receptacles areshown in Figure 1.Table 3 Control wiring specificationsAccessory plug catalognumberNumberof pinsCable rangeO.D. (in.)Maximumwire sizeAWGCCR010P1 5 0.437-0.562 12CCR009P1 6 0.500-0.625 16