Separate a UPS Unit from the RPA Parallel System (System Redundancy). ABB TLE Scalable UL Series UPS

73/86 TLE Scalable Series 40 to 150 UL S1 UPS User Manual / REV-B

7.3.2

Separate a UPS Unit from the RPA Parallel System (System Redundancy)

Note!

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.

Note!

The Load is powered by the UPS RPA Parallel System.

One UPS Unit of the RPA Parallel System has to be turned OFF, while the Load is shared between the other Units supplying the Parallel Bus.

The Control Bus cable connecting J1A - J2A and J1B - J2B cannot be connected or disconnected after the system has been powered ON.

Initial status:

Load supplied by all Inverters of the RPA Parallel

System.

1. Disconnect the Inverter performing the “Inverter OFF” command on the Unit to separate.

1 - Perform the “Inverter OFF” command from the screen:

Commands 1 / Inverter / OFF .

2 - Repeat the “Inverter OFF” command from the screen:

Commands 1 / Inverter / OFF .

With Redundant System, performing the “Inverter OFF” command the Inverter shuts down and it will stay OFF.

Performing the “Inverter OFF” command the Load is transferred to the Utility and the Inverter remains operating, it means the system is not redundant.

In this case is not possible to switch-OFF one Unit without transferring the Load on Mains.

• Load supplied by Inverter(s) of the other Unit(s) of the RPA Parallel System.

Synoptic diagram of the Unit to separate

2. Open “Q1 - UPS Output switch” (Pos. O) on the Unit to separate.

• LED ALARM is lit.

Synoptic diagram of other Units

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

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74/86 TLE Scalable Series 40 to 150 UL S1 UPS User Manual / REV-B

3. Perform the command “Module shutdown” on the Unit to separate only when the symbol Q1 in the Synoptic Diagram is shown open.

Perform the command “Module shutdown” through the screen:

Commands 1 / Module shutdown / SHUTDOWN .

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

4. Disconnect the Battery on the Unit to separate by opening the “ Battery Cabinet Breaker ” (Pos. O).

Press “MUTE” key to reset Acoustical Alarm. LED ALARM remains lit.

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

Note!

Before performing the next procedure (5) wait 5 minutes for DC-link Capacitors discharge.

Use the MEASURES/Rectifier screen to ensure that the DC-link 1 and DC-link 2 voltage has reached 10Vdc.

5. Disconnect the Utility supply on the Unit to separate.

LCD display is OFF

Synoptic diagram of the Unit to separate

End of Procedure

Synoptic diagram of other Units

Danger!

It will take 5 minutes for the DC capacitors to discharge.

Open only the front door, do not open any other part of the UPS.

Note!

For any further intervention contact your ABB Service Center.