User manual

Static Transfer Switch

UNB

User Manual

Page 18 (28)

4. Handling

4.1 Storage

The UNB must be stored in a dry, dust free environment with a storage temperature according to specified data

(see section 7).

4.2 Commissioning

Note: Before commissioning the module make sure that the voltage level of both input sources and the battery

voltage correspond to the values according to the type plate of the UNB.

To mount the inverter in a 19’’ compatible cabinet, a mounting-kit according to section 3.1 is necessary. After un-

packing the unit put it upon the rails and slide in the unit carefully over the rails until the module connector gets in

touch with the backplane connector. Increase the pressure until the unit fits in completely. Please avoid too much

pressure. If the unit does not fit in please start again with the complete slide-in process.

Mount the unit with 4 screws (M4x12).

Caution: The unit is delivered without internal fuses. Therefore the unit has to be fused externally at the input

source “mains” to protect the internal thyristors against damages in case of short circuit. The pre-fuse must be

dimensioned according to the nominal output power of the UNB. In case of inverters in parallel operation, the out-

put of each inverter has to be fused.

4.3 Operation

The operation and adjustment respectively of the unit takes place with keys located at the front side of the unit.

All main functional parameters and measuring values are displayed on the front side LCD panel (text indicator) as

well as with LED indications. They are described in the following.

4.3.1 LED indication

LED Indication Colour Operation mode

STANDBY green The UNB is switched on and operational

SOURCE 1 green

Voltage and frequency of source 1 (priority

source) are within allowable range

SOURCE 2 green

Voltage and frequency of source 2 (substitute

source) are within allowable range

SYNCHR. green Inverters are synchronised with mains by UNB

LOAD ON INVERTER green Load fed by inverter

LOAD ON MAINS green Load fed by mains

ALARM red

General Alarm (the assignment of the individual

alarm messages is programmable)