Liebert Series 600T manual Start-Up Procedure SCC Start-Up

3.3.1Start-Up Procedure

SCC Start-Up

When the UPS system has been shut down, for any reason, use this procedure to start-up the UPS system to pro- vide filtered, reliable

power to the critical load. This procedure gives step-by-step instructions for controls to operate and conditions to observe. Your present situation could be initial start-up or recovering from input power failure, battery shut- down, 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 Customer Service. 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 critical 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 shutdown, 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.

Step 1. Before you apply power to the UPS modules, determine the position of the following circuit breakers and switches:

a.Bypass Input Breaker (BIB) - If this circuit breaker is closed, you may already have power to the critical load through the bypass line. If this breaker is closed, leave it closed. If it is open, leave it open until you are ready to energize the bypass line.

b.System Bypass Circuit Breaker (SBB) - This motorized circuit breaker (Figure 9) should be closed unless you are recovering from a Remote Emergency Power Off. You may already be supplying power to the critical load through this breaker. If this breaker is open, you will be instructed to reset it later in this procedure.

c.UPS Output Circuit Breaker - This motorized circuit breaker (see Figure 9) should be open.

d.Static Switch Disconnects - These manually operated switches (see Figure 9) will be in the ON (closed) position unless you are recovering from a shutdown. If these switches are OFF (open), you will be instructed to reset them and turn them on later in this procedure.

NOTE

Depending on SCC model, the static switch disconnects can be two circuit breakers, contactors, or plug-in connections on a drawout carriage assembly. The location could be at the front, right, or rear of the cabinet. Refer to the drawing of the SCC cabinet selected for your UPS system.

Operation 91

DISCONTINUED

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