Reconnect A Ups Unit To Rpa Parallel System - ABB MegaFlex UL S1 Series User Manual

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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
disconnected after the system has been powered on.
The bus terminals must be properly connected before powering the additional unit.
If eBoost™ option is available, make sure that eBoost™ 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 "Q1 – External UPS Output Circuit Breaker" and the "External Battery 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 the "Q1 – External UPS Output Circuit Breaker" (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 the unit to reconnect
MegaFlex 1000 to 1600
J1A - J2A and J1B - J2B
Synoptic diagram of other units
Synoptic diagram of other units
UPS User Manual / REV-A
in any case cannot be connected or
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