
Feeder Terminal
REF 541, REF 543, REF 545.
1MRS750443-MBG
43
Ordering
The following is to be specified when order-
ing REF 54_ terminals: order number, display
language combination and quantity of feeder
terminals.
Each REF 54_ feeder terminal has a specific
order number that identifies the feeder termi-
nal type as well as the hardware and the soft-
ware as described below.
The order number is labelled on the marking
strip on the front panel of the feeder terminal
delivered, e.g. Order No:
REF543KC127AAAA.
A050601
The functionality level (C) determines the
extent of the selection of function blocks
available for the feeder terminal. For more
detailed information on the separate function
blocks included in each selection, please see
the table
Functionality levels, protection
functions
on the next page or consult your
relay supplier.
In addition, optional functions, such as fault
locator, power quality, capacitor bank protec-
tion and power factor control functions are
available.
The display language combination (see table
below) is identified by a three-digit suffix in
the software number labelled on the front
panel of the feeder terminal, e.g. Software
1MRS110028-0__.
REF54_KC127AAAA
Software revision: A, B, C, D, E, F, G, H, K
Feeder terminal type: REF 541, REF 543, REF 545
Hardware number: 115, 118, 127, 129, 133
A = fixed display, B = external display module
Auxiliary voltage range of a power supply module and
voltage range of digital inputs
A: power supply: PS1/240 V (Medium) or PS2/240 V
Ur = 110/120/220/240 V ac;
110/125/220 V dc
digital inputs: Ur = 110/125/220 V dc
threshold voltage: Ut = 80 V dc
B: power supply: PS1/240 V (High) or PS2/240 V
Ur = 110/120/220/240 V ac;
110/125/220 V dc
digital inputs: Ur = 220 V dc
threshold voltage: Ut = 155 V dc
C: power supply: PS1/48 V (Low) or PS2/48 V
Ur = 24/48/60 V dc
digital inputs: Ur = 24/48/60/110/125/220 V dc
threshold voltage: Ut = 18 V dc
A = without sensor, B = with sensor
Reserved for future use
Functionality level: C = Control, B = Basic, M = Multi
Functionality
level
Selection of function blocks
C (Control)
All control, condition monitoring and measurement functions
B (Basic)
All control, condition monitoring and measurement functions,
basic protection functions
M (Multi)
All control, condition monitoring, measurement and
protection functions
Language combinations
Suffix
Language combination
001
English-German
002
English-Swedish
003
English-Finnish
007
English-Portuguese
008
English-Polish
009
English-Russian
010
English-Spanish
012
English-Czech