1MRS755225
Transformer Terminal
Technical Reference Manual, General
RET 54_
91
5.2.
Design description
5.2.1.
Technical data
Table 5.2.1-1
Energizing inputs
Rated frequency
50.0/60.0 Hz
Current inputs
rated current
0.2 A/1 A/5 A
thermal withstand
capability
continuously
1.5 A/4 A/20 A
for 1 s
20 A/100 A/500 A
dynamic current withstand, half-wave
value
50 A/250 A/1250 A
input impedance
<750 m
/<100m
<20 m
Voltage inputs
rated voltage
100 V/110 V/115 V/120 V
(parameterization)
voltage withstand, continuous
2 x U
n
(240 V)
burden at rated voltage
<0.5 VA
Table 5.2.1-2
Auxiliary power supplies
Type
PS1/240V
(RET 541,
RET 543)
PS2/240V
(RET 545
only)
External
display
module
PS1/48V
(RET 541,
RET 543)
PS2/48V
(RET 545
only)
Input voltage, AC
110/120/220/240 V
-
Input voltage, DC
110/125/220 V
24/48/60 V
Voltage variation
AC 85…110%, DC 80…120%
of rated value
DC 80…120% of rated
value
Burden
<50 W
Ripple in DC auxiliary voltage
max. 12% of rated DC value (IEC 60255-11)
Interruption time in auxiliary DC
voltage without resetting
<40 ms, 110 V and
<100 ms, 200 V
<60 ms, 48 V and <100
ms, 60 V
Internal overtemperature
indication
+78
C (+75…+83
C)
Table 5.2.1-3 Digital inputs
Power supply version
PS1/240 V (High)
PS1/240 V (Medium),
PS2/240 V
PS1/48 V (Low), PS2/48
V
Input voltage, DC
220 V
110/125/220 V
24/48/60/110/125/220 V
Activating range, DC
155...265 V
80...265 V
18…265 V
Current drain
~2…25 mA
Power consumption/input
<0.8 W
Pulse counting (specific
digital inputs), frequency range
0...100 Hz
