Universal Bypass Switch Unit
UNB
Operation Manual
UNB2357E / Page 9 (34)
5. Operation
The operation of the unit takes place over the On-/Off switch
located on the front plate as well as the control buttons for
the micro-controller control unit The present valid condition
of the unit, also the input and output values are shown over
a clear letter LCD- display as well as via the LED-status
indicator. These are described in the relevant chapters and,
are assigned via the labelling on the front-plate of the unit.
LED
Indication
Colour.
Operation mode
STATIC BYPASS
SWITCH
operation
green STATIC BYPASS SWITCH SBS is
switched on, internal operation
current available
Source 1 online
present
green Voltage and frequency of source 1
(preferred source) in limit
Source 2 online
present
green Voltage of source 2 (substitute
source) available
Synchronisation green SBS and inverter are synchronous
or STATIC BYPASS SWITCH SBS
synchronised with mains (see
Synchronisation process)
Load at inverter green Load fed by inverter
Load at mains green Load fed by mains
General fault
alarm
red
Time delayed general fault alarm,
time delay 20sec., parallel an
indication relay acts; all distortion
will be monitored.
The adjustment takes place with the four front keys:
- during menu item selection: change to
previous item (parameter)
- during adjustment mode: increase value
- during menu item selection: change to next
item (parameter)
- during adjustment mode: decrease value
ESC
- leave the menu without changing
ENTER
- call menu
- leave menu with changing
- to store parameter
Front keys