Reconnect a UPS Unit to RPA Parallel System. ABB TLE Scalable UL Series UPS

75/86 TLE Scalable Series 40 to 150 UL S1 UPS User Manual / REV-B

7.3.3

Reconnect a UPS Unit to RPA Parallel System

Note!

The Load is still powered by the other Units supplying the Parallel Bus.

This UPS Unit will be powered on and connected to the Parallel Bus in order to share the Load with each other's.

The high-speed bus cable connecting J1A - J2A and J1B - J2B in any case cannot be connected or disconnected after the system has been powered on.

The bus terminals must be properly connected before powering the additional Unit.

Make sure that “SEM - Super Eco Mode” Operation Mode is disabled before starting this procedure.

If IEMi option is available, make sure that IEMi Operation Mode is disabled before starting this procedure.

Open the front door, of the Unit to reconnect and make sure that:

• All the connections to the input/output terminals or bus bars of the UPS have been made correctly.

• The protection panels are fastened in their correct position.

• The switch “ Q1 - UPS Output ” is open (Pos. O) and the “Battery Cabinet Breaker” must be open (Pos. O).

1. Switch-ON the Utility voltage, on the Unit to reconnect, from the input distribution (both Rectifier and

Bypass if separated).

At this stage the Electronic Power Supply and Control Panel are switched ON and the Buzzer sounds.

Press “MUTE” key to reset Acoustical Alarm.

LED ALARM remains lit.

Synoptic diagram of the Unit to reconnect

2. Close “Q1 - UPS Output switch” (Pos. I) on the Unit to reconnect.

• Rectifier starts automatically.

LED 1 (Rectifier) blinking, indicates Soft-start.

• At the end of Rectifier Soft-start the LED 1 (Rectifier) remains lit.

Synoptic diagram of other Units

Synoptic diagram of the Unit to reconnect Synoptic diagram of other Units

Continue →

76/86 TLE Scalable Series 40 to 150 UL S1 UPS User Manual / REV-B

Note!

Ensure the LED 1 (Rectifier) is lit before carrying out this procedure (3).

It indicates that the DC-link 1 and DC-link 2 has reached 450Vdc (see screen MEASURES /

Rectifier)!

3. Connect the Battery on the Unit to reconnect by closing the “ Battery Cabinet Breaker ” (Pos. I).

Synoptic diagram of the Unit to reconnect Synoptic diagram of other Units

Note!

Before performing the next procedure (4) make sure that the LED 3 (Booster/Battery charger) is lit.

4. Insert the Inverter performing the command "Inverter ON” on the Unit to reconnect.

Perform the “Inverter ON” command from the screen:

Commands 1 / Inverter / ON .

• After Soft-start of the Inverter the Inverter connects automatically to the other Units of the RPA Parallel

System.

• LED ALARM turns OFF and the LED LOAD PROTECTED must be lit.

The Synoptic Diagram, on all UPS Units, must display the status “ Load supplied by Inverter ”.

Synoptic diagram of the Unit to reconnect

End of Procedure

Synoptic diagram of other Units