Eaton Power-Sure 700 Instruction Manual
Also see for Power-Sure 700: Installation and user manualInstallation and user manualInstallation and user manual
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Contents
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8Equipment requiredInstruction manual IM1002004E September 2015 www.powerquality.eaton.comEquipment requiredTrue rms digital multimeter, SCR tester, common hand tools.Step 1: Disassembling the power line conditionerA. Turn off the power to the conditioner at its source.B. Turn off the input circuit breaker on the unit and theoutput circuit breakers to all loads (remove all loadsfrom unit).C. Remove the top and side covers to the conditioner.Step 2: Electrical connections, fusesRefer to diagrams on page 11–page 16 for componentlocations.A. Inspect the unit for proper tightness of all electricalconnections, burnt, frayed, broken, or loose connectionsand components in these areas.Input and output connections, SCR assembly, SCRsnubber, output filter assembly, MOVs (metal oxidevaristors), circuit boards, bypass switch, andtransformer connections.B. Correct and tighten any loose connections, replaceany physically burned or broken components.C. Check all fuses in system.otes:N Remove fuses from circuit when checking to avoidfalse readings.D. Time delay fuses, semi-conductor fuses, fan fuses,circuit board fuses, SCR fusible Link wire.Power modules (SCRs)Refer to diagram on page 17 for 10–30 kVA SCRassembly, page 18 for 45–150 kVA SCR assembly,page 19 for 225–300 kVA SCR assembly, and page 20for 500 kVA SCR assembly.1. Unplug the connections to the control cardsPart # 49120/407415 labeled TB1, TB2, and TB3.2. Disconnect any cooling fans in the unit so your SCRresistance checks are not interfered by fan motor coils.Also, remove main semi-conductor fuse located onall three SCR assemblies and any wires attached tothe fuse. Each power module contains two inverseparallel SCRs.Figure 2. Power module3. Measure the following resistance on each powermodule. There are seven per phase or 21 for all threephases. Refer to the circuit diagrams received withyour unit.otes:N When checking the power module assembly, if morethan one defective power module is present it willappear as if all the power modules are defective. Ifthis is the case, the individual power module must beisolated from the power transformer.a. K1-1 to K2-1 through K1-7 to K2-7 = High resistance,1 megohm.b. K1-1 to G1-1 through K1-7 to G1-7 = 10 to 90 ohms.c. K1-1 to G2-1 through K1-7 to G2-7 = 1 megohm.d. K2-1 to G2-2 through K2-7 to G2-7 = 10 to 90 ohms.e. K2-1 to G1-1 through K2-7 to G1-7 = 1 megohm.f. G1-1 to G2-1 through G1-7 to G2-7 = 1 megohm.4. Replace any defective power modules. This may requireremoving the shunt and loosening the K1 bus from allthe power modules to get the defective power moduleout. Use only equivalent hardware and heat sink greasewhen replacing power modules.5. If a resistance measure is questionable, a morethorough test will ensure an SCR is good or bad byusing the following test procedure.a. Completely isolate SCR under test by removing allconnections to the device.b. Hook up the following test circuit to each individual SCR.c. Plug in SCR tester. With switch #1 open light bulbshould be off. If not, replace SCR.d. Close switch #1. Light bulb should illuminate to about3/4 brilliance. If not, replace SCR. See Figure 3.G1G2 ShuntTransformer |
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