ABB REF601 Applications Manual page 26

Section 4
Protection and Control Function
20
Figure 3: Application diagram of TCS function
When the circuit breaker is open, TCS measure the voltage across the trip contact
through Rext (external shunt resistance shown in below figure) and trip coil. When
the circuit breaker is close, TCS measure the voltage across the trip contact through
CB internal contact and trip coil. Below table shows the specification for the Rext
for the TCS circuit.
Table 11: TCS functionality specification
Description
Auxiliary voltage range
Current drain through the supervision circuit
Minimum voltage over the TCS contact
Operating voltage Vaux
48 V DC
60 V DC
110 V DC
220 V DC
Whenever TCS functionality is enabled, it is recommended to connect R
Otherwise, TCS sees a faulty trip circuit in open circuit breaker position.
Table 12: TCS functionality parameters and selection range
Name Value (Range)
1...10
Operate delay time
10...300
Reset delay time 0.5
Value
48-250V AC/DC
~1.5 mA
20 V AC/DC
Recommended shunt resistor Rext
1.2 k , 5 W
5.6 k , 5 W
22 k , 5 W
33 k , 5 W
Unit Step Default
Sec 1
1
Sec 1
Sec --- 0.5
1MDU07212-YN Rev. A
.
ext
Description
Settable
Fixed
REF601 / REJ601
Application Manual