Liebert 1000kVA manual Manual Procedures, SCC Start-Up Procedure

Operation

3.4Manual Procedures

The Liebert Series 610 UPS system is designed to function while unattended by an operator. The sys- tem control logic at the System Control Cabinet (SCC) monitors the performance of the UPS system, the availability of power sources and the current required by the critical load.

The system control logic at the SCC:

1.Determines what overload conditions can be sustained without a transfer to bypass.

2.Initiates an automatic transfer to bypass to sustain an overload.

3.Can initiate an automatic retransfer to the UPS after a system overload has been cleared.

4.Initiates an automatic transfer to bypass and emergency module shutdown when a specified UPS fault occurs.

The control logic at each UPS module:

1.Determines what overload conditions can be sustained by the module while it is on-line.

2.Automatically takes the UPS module off line and initiates an emergency module shutdown when selected UPS faults occur.

Refer to 3.5 - Automatic Operations for more details.

Manual procedures available to the operator include Start-Up, Load Transfers and Shutdowns. These procedures are performed by using the operator control panel and some manually operated circuit breakers and switches.

The LCD at each UPS cabinet includes a screen to help you with each manual procedure by listing each step you must perform.

This section lists step-by-step controls to operate and conditions to observe in the following manual procedures:

1.Start-Up:including initial start-up, recovering from input power failure, recovering from battery shutdown and recovering from shutdowns for emergencies or maintenance procedures.

2.Load Transfers: including transfers from UPS system to bypass and retransfers from bypass to the UPS system.

3.Shutdowns: including module shutdowns for maintenance procedures and emergency shutdowns.

3.4.1SCC Start-Up Procedure

When the UPS system has been shut down for any reason, use this procedure to start-up the UPS sys- tem to provide filtered, reliable power to the critical load. This procedure gives step-by-step instruc- tions for controls to operate and conditions to observe. Your present situation could be initial start-up or recovering from input power failure, battery shutdown, maintenance shutdown or an emergency shutdown.

NOTE

The following procedure assumes that the UPS installation inspection and initial start-up have been performed by Liebert Global Services. A Liebert-authorized representative must perform the initial system start-up to ensure proper system operation.

! CAUTION

The following procedure provides power to the critical load distribution system. Verify that the critical load distribution is ready to accept power. Make sure that personnel and equipment are ready for the critical load distribution system to be energized.

If your installation includes a Maintenance Bypass, you may already be supplying power to the criti- cal load equipment through the Maintenance Bypass. If there is no power to the critical load, apply power through the UPS bypass line per the following procedure.

During a start-up procedure, power is supplied to the critical load through the UPS (internal) bypass line while the UPS system is being energized. Depending on the reason for your UPS system shut- down, you may already have power through the bypass line. You can determine this by observing the Monitor/Mimic Display screen at the System Control Cabinet (SCC) after Control Power is available.

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