American Power Conversion MW manual Specifications Low-Impedance/High-Impedance Grounding

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Specifications: Low-Impedance/High-Impedance Grounding

For high-impedance grounding, the installation must include ground-fault detection circuitry.

Note

From an external grounding resistor, and through a separate conduit, connect a cable to the output circuit grounding bar.

28	Symmetra MW 1000 kW 480 V Installation - 990-4112E

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Contents Installation Page Contents Specifications Safety Symbols used in this guideInstallation safety EPOUPS Sections Serial numberInverter Section Control SectionConfigurations Configuration 1 Inverter Section placed to the leftConfiguration 2 Inverter Section placed to the right Total width of UPS sections 4138 mm/163 WeightExternal Bypass Static Switch Typical UPS Wiring Principle Power wiring overviewExternal disconnection switches Input/Output wiring precautionsPreparing for top cable entry default Top Cable EntryBattery cable connections top cable entry Front view of Input/Output Section Ground and AC cable connections top cable entry Bottom Cable Entry Preparing for bottom cable entryElectrical Installation Bottom Cable Entry Battery cable connections bottom cable entry Battery BAT 1 + BAT 2 + IN/OUT power cable bottom entry Ground and AC cable connections bottom cable entry Bypass Static Switch Wiring Top cable entry Bottom cable entry Communication cable overview Connectionplane 0P0957Relay Board Optional Location of optional Relay BoardCommunication cables with optional Relay Board Relay Name Events that will trigger the alarm Mode Comment Relay Board functionsIN1 Page High-impedance grounding Low-Impedance/High-Impedance GroundingLow-impedance grounding Specifications Low-Impedance/High-Impedance Grounding Electrical Specification Installation Planning DataAC Input DC InputHeat Dissipation AC OutputAC Input External Bypass SSW 16 National Electrical Code Size Temperature Rating of Cables See Table Torque specifications Recommended cable, bolt, and lug sizesOutput and downstream breakers minimum settings Required Breaker SettingsInput and upstream breakers minimum settings Dual Utility Installation General Specifications 480 Nema990-4112E