ABB RET 541 Product Manual page 32

32
Transformer Terminal
Three-phase transformer inrush and motor start-up current detector Inrush3, 3I
Ratio I /I >
2f 1f
Start current
Operation mode
Operation accuracy:
- current measurement
- ratio I /I measurement
2f 1f
Start time:
- internal time
- total time
Fuse failure supervision, FuseFail, FUSEF
Ratio U2/U1>
Ratio I2/I1<
Operation accuracy:
- when f/fn = 0.98...1.02:
- when f/fn = 0.95...1.05:
- injected negative-sequence voltage
BSOUT activation time:
- f/fn=0.98...1.02
Reset time
Reset ratio:
- for Ratio U2/U1>
- for Ratio I2/I1<
Table 8: Energizing inputs
Rated frequency
Current inputs rated current
thermal withstand
capability
dynamic current withstand, half-wave value
input impedance
Voltage inputs rated voltage (parameterization)
voltage withstand, continuously
burden at rated voltage
Table 9: Auxiliary power supplies
Type
Input voltage, ac
Input voltage, dc
Voltage variation
Burden
Ripple in dc auxiliary voltage
Interruption time in auxiliary dc
voltage without resetting
Internal overtemperature
indication
5...50%
0.10...5.00 x In
Not in use
Inrush mode
Start-up mode
Note! The values below apply when f/fn = 0.95...1.05
±2.5% of set value or ±0.01 x In
±5.0% of set value
<32 ms
<40 ms
10...50%
10...50%
±2.0 percentage units (of settings Ratio U2/U1> and Ratio I2/I1<)
±4.0 percentage units (of settings Ratio U2/U1> and Ratio I2/I1<)
= 2.00 x Ratio U2/U1>
< 35 ms (within the same task and when the task interval is 10 ms)
20 ms (within the same task)
0.8...0.96
1.04...1.2
50.0/60.0 Hz
continuously
for 1 s
PS1/240V PS2/240V
(RET 541, (RET 545
RET 543) only)
110/120/220/240 V
110/125/220 V
ac 85...110%, dc 80...120%
of rated value
<50 W
max. 12% of the dc value
<40 ms, 110 V and
<100 ms, 200 V
+78C (+75...+83C)
RET 541, RET 543, RET 545
>
2f
1 A/5 A
4 A/20 A
100 A/500 A
250 A/1250 A
<100 m<20 m
100 V/110 V/115 V/120 V
2 x U (240 V)
n
<0.5 VA
External PS1/48V
display (RET 541,
module RET 543)
-
24/48/60 V
dc 80...120% of rated value
<60 ms, 48 V and
<100 ms, 60 V
1MRS755543
PS2/48V
(RET 545
only)