User manual

Static Transfer Switch

UNB

User Manual

Page 14 (28)

3.3.5 Connectors UNB 30.0kVA & UNB 40.0kVA

View from the rear: UNB 30.0/40.0kVA

Connector X1 Connector X2 Connector X3

(HAN-K4/8, socket outlet)

Pins (X1)

Function

Pins (X2)

Function

1 Source 1 (inverter) / Phase L1 1 Source 2 (substitute mains) / Phase L1

2 Source 1 (inverter) / Phase L1 2 Source 2 (substitute mains) / Phase L1

3 Source 1 (inverter) / Phase L1 3 Source 2 (substitute mains) / Phase L1

4 No connection 4 Source 1 & 2 / neutral

5 No connection 5 DC-supply / L+

6 Synchronization / SYNC-GND 6 DC-supply / L-

7 Synchronization / SYNC-SIG 7 No connection

8 Synchronization / SYNC-STAT 8 No connection

9 Remote switch ON (+24V) 9 No connection

10 No connection 10 Indication relay general fault / COM*

11 No connection 11 Indication relay general fault / NO

12 No connection 12 Indication relay general fault / NC

*Function logic: fault = COM and NC closed

OK = COM and NO closed

(Is equal to the programming “not inverted”)

REMARK: If the UNB works in combination with a single inverter or inverters in parallel operation it is necessary to

connect through the synchronization bus (contacts SYNC-GND→ SYNC-GND, SYNC-SIG→ SYNC-SIG and SYNC-

STAT→ SYNC-STAT) between the inverter(s) and the UNB.

Pins (X3)

Function

1 UNB Output/Phase L1

2 UNB Output/Phase L1

3 UNB Output/Phase L1

4 No connection

5 No connection

6 No connection

7 No connection

8 No connection

9 No connection

10 No connection

11 No connection

12 No connection