Siemens SIPROTEC 4 7VK61 Manual page 181

To keep the circuit breaker trip coil not energized in the above case,R
[formel-rmin-260602-kn, 1, en_GB]
Ι
BI (HIGH)
U
BI min
U
CTR
R
CBTC
U
CBTC (LOW)
If the calculation results that R
threshold U
BE min
"Hardware Modifications").
For the power consumption of the resistance the following applies:
[formel-leistungvon-r-260602-kn, 1, en_GB]
Example:
Ι
BI (HIGH)
U
BE min
U
ST
R
CBTC
U
LSS (LOW)
[beispiel-rmax-150502-kn, 1, en_GB]
[beispiel-rmin-150502-kn, 1, en_GB]
[beispiel-rmittelwert-150502-kn, 1, en_GB]
The closest standard value of 39 kΩ is selected; the power is:
SIPROTEC 4, 7VK61, Manual
C53000-G1176-C159-5, Edition 05.2018
Constant current with activated BI ( = 1.8 mA)
Minimum control voltage for BI
19 V for delivery setting for nominal voltages of 24 V/48 V/60 V;
88 V for delivery setting for nominal voltages of 110 V/125 V/220 V/250 V;
176 Vfor delivery setting for nominal voltages of 220 V/250 V
Control voltage for trip circuit
DC resistance of circuit breaker trip coil
Maximum voltage on the circuit breaker trip coil that does not lead to tripping
< R then the calculation must be repeated, with the next lowest switching
max min
and this threshold must be implemented in the relay using plug-in jumpers (see Section
1.8 mA (vom SIPROTEC 4 7VK61)
19 V for delivery setting for nominal voltages 24 V/48 V/60 V
(from the device 7VK61);
88 V for delivery setting for nominal voltages 110 V/125 V/220 V/250 V
(from the device 7VK61);
176 V for delivery setting for nominal voltages 220 V/250 V
(from the devicet 7VK61)
110 V (system / trip circuit)
500 Ω (system / trip circuit)
2 V (system / trip circuit)
Mounting and Commissioning
3.1 Mounting and Connections
is derived as:
min
181