25kVA PDU Module

Specifications subject to revision without notice

Power Rating:25 KVA Continuous; 30 KVA Instantaneous

Input Voltage:200/208/380/400/415/480 VAC Delta, User Selectable

Output Voltage:208/120 VAC WYE

Overload Protection:Main Input Circuit Breaker with adjustable trip settings; Output distribution circuit breakers

Night Mode:Save Power when System is standby mode

Before connecting the input power cables, determine the nominal value of the input voltage. The PDU allows for nominal input voltages of 200, 208, 380, 400, 415, or 480 VAC (three phase). Input voltage selection is accomplished as follows:

1. On the Main Disconnect Panel (MDP), turn off the PDU circuit breaker, lock and tag appropriately.

2. Using a voltmeter or other voltage indicating device at the Primary Test Jack, check to be sure that no voltage is being applied to the input of the PDU.

3. Remove the front cover of System Cabinet and the lower cover of PDU.

   Figure 2 shows the Input Voltage Selection terminal block. Figure 3 shows how to remove/install terminal cable. For each of the three phases, be sure the wire is connected to the proper terminal for the actual input voltage at the site and that the terminal screw is tight to make a good connection.

4. Remove the cover panel from the front panel of the PDU marked “MAIN INPUT CIRCUIT BREAKER CURRENT ADJUST”. See Figure 4.

5. The overload and short circuit trip settings for the Main Input Circuit Breaker must be set to the correct values corresponding to the input voltage.

   1. Remove the small cover plate under the Main Input Circuit Breaker which is held in place by four screws and lift open the transparent plastic cover on the lower portion of the circuit breaker to give access to the dip switches controlling the circuit breaker operation.

   2. Figure 5 shows the position of the dip switches for each input voltage selection. Set the dip SW to the correct value corresponding to the input voltage.

Figure 2. INPUT VOLTAGE SELECT TERMINAL BLOCK

Figure 3. How to remove/install terminal cable

notice For input cables, use wire sizes in accordance with National Electric Code Table 310-16. Table 1 gives maximum full-load input currents in amperes (which would occur at 10% undervoltage) for each of the input voltages, as a guide to selecting proper wire sizes.

Figure 4. Cover for Overload and short circuit trip dip SW

Figure 5. CIRCUIT BREAKER DIP SWITCH SETTINGS

The Main Input Circuit Breaker operating handle has three positions:

• OFF (Horizontal)

• ON (vertical)

• TRIPPED (slightly to the left of vertical). If the Main Input Circuit Breaker has been tripped, it is necessary to move the handle to the OFF position to reset it before turning it ON.

The Main Input Circuit Breaker may be locked in the OFF position. By pressing on the small triangle on the operating handle, the lockout tab is made accessible to a padlock.

The Power OFF button at the top of the front panel, when pressed, will immediately trip the Main Input Circuit Breaker, interrupting all power to the load.

Refer to Lockout / Tagout for PDU in System Cabinet