American Power Conversion VT ISX manual Operation Modes

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Operation

Operation Modes

The UPS has four different operation modes. If the installation includes a Maintenance Bypass Panel, bypass mode and test mode will also be available.

Normal operation

During normal operation, the UPS converts utility power to conditioned power for the connected load.

Battery operation

During battery operation, the UPS provides power to the connected load from its internal and (if applicable) external batteries for a finite period. The UPS transfers to battery operation if the supply of utility power fails, or is outside pre-defined limits.

Bypass operation (or static bypass operation)

Static bypass operation can either be obtained by user request or automatically, as the UPS will switch into bypass operation if both the normal and battery operation modes are unavailable. During static bypass operation, the utility power is sent through internal Radio Frequency Interference (RFI) filters to the connected load, bypassing the internal power converters. The UPS transfers to bypass operation following a command received via the display, or after a short or heavy overload on the output of the UPS. Battery back-up is not available in bypass operation.

Mechanical bypass

In mechanical bypass, utility power is sent directly to the connected load through a mechanical breaker, bypassing all internal UPS functions and filters. Mechanical bypass is obtained by the operation of the mechanical bypass lever located behind the front cover. Mechanical bypass is a feature designed to keep the load supplied with utility power at maintenance of the power sections of the UPS. All major maintenance operations can be performed with the UPS running in mechanical bypass, and with the load being supplied directly with unconditioned utility power.

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Smart-UPS® ISX 30-40 kVA, 400V Operation

990-2820A

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Contents Operation Page Companion manuals How to find updates to this manualAbout this Manual Page Contents Configuration Safety Overview System OverviewSystem Components Opening front and rear doorsUser interface front Battery Module User interface area rearDisplay Rear cover of this manualMenu tree Overview The DisplayBasic display navigation principles Control functionsSelect YES, Turn Load on Status viewsClock set-up LoggingSelect View Statistics Alarm threshold Display setupVol Volume Diagnostics screenOperation Operation ModesOperation Procedures Turn into normal operation from mechanical bypass operation Configuration Connecting load to the PDUsConnecting 1-phase load to PDU Connection of Load to the PDUConnecting 3-phase load to PDU Disconnecting load from the PDUs PDU output breaker ratingsHow to return parts to APC Parts ReplacementHow to determine if you need a replacement part How to remove Battery Modules How to install a Battery Module How to replace a Network Management Card Troubleshooting Display messagesTroubleshooting Parts Replacement Troubleshooting Parts Replacement Power application RestartVoltage confirmation Page 05/2006 APC Worldwide Customer Support990-2820A