Reconnect A Ups Unit To A Parallel System - GE 8 Series Operating Manual

8.2.5 Reconnect a UPS unit to a 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.
WARNING !
The high speed bus cable connecting J52 (A) and J62 (B) 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.
Open the front door of the Unit to reconnect, and make sure that:
The switches Q1, Q2, Q4 are open (Pos. 0) and the battery fuses F8 – F9 are disconnected.
•
The protection panels are fastened in their correct position.
•
Apart from the hinged lockable door, all the other panels are mounted and correctly grounded.
•
1. Switch-ON the mains voltage, on the Unit to reconnect, from the input distribution (both
rectifier and bypass if separated).
At this stage the electronic power supply is switched ON and the buzzer sounds.
LED 2 (input mains bypass) must be ON.
Press "MUTE" key to reset acoustical alarm.
LED Alarm remains lit.
A successful termination of the tests will be indicated with Overall
test results "OK".
Commissioning cannot be continued should one or more tests result
to be negative.
Please contact in this case your Service Centre.
2. Check, on the Unit to reconnect, for correct phase rotation of input mains on "P1 - Power
Interface".
•
Lamp B1 ON:
•
Lamp B1 OFF:
3. Close the input rectifier switch Q4 (Pos. I) on the Unit to reconnect.
LED 1 (input mains rectifier) must be lit and LED 3 (rectifier) must blink.
The rectifier starts up automatically, supplying the DC circuit, and charging the DC capacitors.
The LED 3 (rectifier) stops blinking and stays ON, indicating that the DC link has reached the floating voltage.
Modifications reserved
OPM_SPE_XXX_10K_40K_8GB_V020.doc
the phase rotation (clockwise) is correct (see Fig. 5.8.2-1).
the phase rotation (anti-clockwise) is not correct (see Fig. 5.8.2-1).
In this case switch OFF the mains, reverse two phases between them on the line
supplying the UPS and repeat the procedure from point 1.
Overall test results
Test1 OK Test7 OK
Test2 OK Test8 OK
Test3 OK Test9 OK
Test4 OK Test10 OK
Test5 OK Test11 OK
Test6 OK
Operating Manual SitePro 10-15-20-30-40 kVA / S8
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