ABB RELION REX640 Technical Manual page 1741

1MRS759142 C
REX640
Technical Manual
Table 1490: Energizing inputs (sensors)
Description
Current sensor input Rated current voltage (in
secondary side)
Continuous voltage
withstand
Input impedance at 50/60
Hz
Voltage sensor input Rated primary voltage
Continuous voltage
withstand
Input impedance at 50/60
Hz
1) Equals the current range of 40...4000 A with a 80 A, 3 mV/Hz Rogowski
2) This range is covered (up to 2*rated) with sensor division ratio of 10 000:1
Table 1491: Binary inputs
Description
Operating range
Rated voltage
Current drain
Power consumption
Threshold voltage
Ripple in the DC auxiliary voltage
Adjust the binary input threshold voltage correctly. It is recommended
to set the threshold voltage to 70% of the nominal auxiliary voltage.
The factory default is 16 V to ensure the binary inputs' operation
regardless of the auxiliary voltage used (24, 48, 60, 110, 125, 220 or
250 V DC). However, the default value is not optimal for the higher
auxiliary voltages. The binary input threshold voltage should be set as
high as possible to prevent any inadvertent activation of the binary
inputs due to possible external disturbances. At the same time, the
threshold should be set so that the correct operation is not jeopardized
in case of undervoltage of the auxiliary voltage.
Technical data
Value
1)
75 mV...9000 mV
125 V
4 MΩ
2)
6 kV...40.5 kV
50 V
8 MΩ
Value
±20% of the rated voltage
24...250 V DC
1.6...1.9 mA
31.0...570.0 mW
16...176 V DC
Max 15% of the DC value (at frequency of 100 Hz)
Section 14
1735