American Power Conversion MW External disconnection switches, Input/Output wiring precautions

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Electrical Installation: Typical UPS Wiring Principle

External disconnection switches

WARNING!

The UPS has no internal manual disconnect devices to switch off external AC (Q1 and Q5) and DC (Q7 and Q8) input power. Ensure that disconnection devices are available as separate components for this installation.

The installer must provide each external disconnection device for this UPS system with labels displaying the following text:

“Isolate the Uninterruptible Power Supply (UPS) as instructed in the User Guide before Note working on circuit.”

Input/Output wiring precautions

WARNING!

Only personnel trained in the construction and operation of the equipment, and the electrical and mechanical hazards involved, may install or remove system components.

WARNING!

Supply the UPS from a dedicated, grounded, 3-wire Wye service.

CAUTION!

All wiring must be in accordance with applicable national and/or local electrical codes.

Use only UL-approved cable lugs.

Note

Use only UL-approved cables. Use only stranded copper conductors. Refer to National Electric Code for wiring and protection. Refer to bolt and lug table in the “Specifications” section.

Note

8	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 Low-Impedance/High-Impedance Grounding Low-impedance groundingHigh-impedance grounding Specifications Low-Impedance/High-Impedance Grounding Electrical Specification Installation Planning DataAC Input DC InputAC Output AC Input External Bypass SSWHeat Dissipation 16 National Electrical Code Size Temperature Rating of Cables See Table Torque specifications Recommended cable, bolt, and lug sizesRequired Breaker Settings Input and upstream breakers minimum settingsOutput and downstream breakers minimum settings Dual Utility Installation General Specifications 480 Nema990-4112E