Siemens siprotec SJ62 User Manual page 371

3 Mounting and Commissioning
Example:
369
In order that the minimum voltage for controlling the binary input is ensured, R
derived as:
So the circuit breaker trip coil does not remain energized in the above case, R
derived as:
I Constant current with activated BI ( = 1.8 mA)
BI (HIGH)
V Minimum control voltage for BI (= 19 V for delivery setting for nominal
BI min
voltage of 24/48/60 V; 88 V for delivery setting for nominal voltage of
110/125/220/250 V)
V Control Voltage for Trip Circuit
CTR
R DC resistance of circuit breaker trip coil
CBTC
V Maximum voltage on the circuit breaker trip coil that does not lead to trip-
CBTC (LOW)
ping
If the calculation results that R
the next lowest switching threshold V
the relay using plug-in jumpers (see Section „Hardware Modifications").
For the power consumption of the resistance:
1.8 mA (SIPROTEC 4 7SJ62/63/64)
I
BI (HIGH)
V 19 V for delivery setting for nominal voltage 24/48/60 V (from
BI min
7SJ62/63/64)88 V for delivery setting for nominal voltage
110/125/220/250 V) (from 7SJ62/63/64)
V 110 V (system / release circuit)
ST
500 Ω (from system / trip circuit)
R
CBTC
V 2 V (system / release circuit)
CBTC (LOW)
< R , then the calculation must be repeated, with
max min
, and this threshold must be implemented in
BI min
C53000-G1140-C147-A, Edition 07.2015
SIPROTEC 4, 7SJ62/63/64 Handbuch
is
max
is
min