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Technical Reference Manual, General
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The following is to be specified when ordering REF 54_ feeder terminals:
• Order number (see Figure 6.1.-1 below)
• Display language combination (e.g. English-German)
• Quantity of feeder terminals
Each REF 54_ feeder terminal has a specific order number that identifies the feeder
terminal type as well as the hardware and the software as described in Figure 6.1.-1
below. The order number is labeled on the marking strip on the front panel of the
feeder terminal delivered, e.g. Order No: REF543GC127AAAA.
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The functionality level 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 consult your relay supplier.
In addition, optional functions such as power quality, capacitor bank protection and
power factor control functions are available.
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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
REF54_GC127AAAA
TypedesK
Software revision: A, B, C, D, E, F, G
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 = 140 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
