Eaton Cooper Power Series Installation And Operation Instruction Manual

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Eaton Cooper Power Series Installation And Operation Instruction Manual Manual pdf 44 page image

Malfunction diagnostic, go to Function Code 80Reset Targets and press the ENTER button two timesto reset targets.Closing the recloser during testingElectrical closing – solenoid-operated reclosersLine voltage is required for automatic recloser operation duringtesting of reclosers equipped with a closing solenoid (exceptfor reclosers equipped with the low voltage closing accessory).For on-line testing, bypass the recloser, open the load-sidedisconnects and keep the source-side disconnects closed.This will remove the recloser from service, but will keep linevoltage supplied to the closing solenoid (Figure 38).For shop testing, the closing solenoid voltage is suppliedby back-feeding a transformer with a low-side rating equal tothe voltage rating of an available power source, and a high-side rating equal to the voltage rating of the recloser (Figure40). A 75 kA transformer of the proper voltage rating withan impedance drop of approximately 3% is satisfactory. TheAC source must have a comparable impedance drop.WARNINgHazardous voltage. Interconnect source leads X and Yand ground solidly to the recloser tank (Figure 40).Do not connect lead Z to any other phase or mechanicalground. Dangerous voltages to ground exist onthe phase connected to lead Z. Solidly ground allequipment. Failure to comply can result in severepersonal injury and/or equipment damage. T224.1WARNINgHazardous voltage. The switchgear (apparatus andcontrol) and high-voltage transformer must be in a testcage or similar protected area to prevent accidentalcontact with the high-voltage parts.Solidly ground all equipment. Failure to complycan result in death, severe personal injury, andequipment damage. T221.5A test circuit for these solenoid-closed reclosers is shownin Figure 40. The following equipment is required for therecommended shop testing setup:otee:N Solenoid-closed reclosers equipped with a 120- or240- VAC low-voltage closing coil accessory can betested as shown in Figure 41.●● Variable Autotransformer T1, 230 Volts, 20 Amps.●● Low-Voltage transformer T2 to simulate fault conditions.● Ratio and size will depend upon the maximum currentto be used. The recloser presents a low impedance tothe transformer, so secondary voltage must be onlyhigh enough to force the required current through thesecondary of the transformer and the recloser.otee:N An alternative method of providing the necessarycurrent through the transformer is shown in Figure 39.●● High-Voltage T3 to operate the closing solenoid.● The closing coil requirement is approximately 200 kVAduring the two-to-three cycle closing operation. Thesolenoid coil operating voltage must be maintained at therecloser bushings during the cycle interval the closingcoil is energized. This procedure is not used on reclosersequipped with the low-voltage closing accessory.●● Ammeter with a rating based on the level of testcurrent.●● Current-actuated timer.5 63 41 2CBABYPASS SWITCHES(CLOSED)SOURCE SIDEDISCONNECT SWITCHES(CLOSED)LOAD SIDEDISCONNECT SWITCHES(OPEN)CLOSINGCOILLOADSOURCESOURCELOADFigure 38. Closing source-side switches of a bypassed “on-line” recloser provides closing solenoid power forautomatic operation during testing39operation inStrUCtionS MN280049EN September 2017Form 4D Microprocessor-based pole-mount recloser control installation and operation instructions