[formel-mittelwert-r-260602-kn, 1, en_US]
In order that the minimum voltage for controlling the binary input is ensured, R
max
is derived as:
[formel-rmax-260602-kn, 1, en_US]
So the circuit breaker trip coil does not remain energized in the above case, R
min
is derived as:
[formel-rmin-260602-kn, 1, en_US]
Ι
BE (HIGH)
Konstantstrom bei angesteuerter BE (= 1,8 mA)
V
BI min
minimum control voltage for BI
V
high
≥ 19 V and V
low
≤ 10 V
for delivery setting for nominal voltages of DC 24 V/ 48 V/ 60 V/ 110 V/ 125 V;
V
high
≥ 88 V and V
low
≤ 44 V
for delivery setting for nominal voltages of DC 110 V/ 125 V/ 220 V/ 250V and AC 115 V bis 250
V;
V
high
≥ 176 V and V
low
≤ 88 V
for delivery setting for nominal voltages of DC 220 V/ 250 V and AC 115 V/ 230 V
VCTR Control voltage for trip circuit
R
CBTC
Ohmic resistance of the circuit breaker coil
V
CBTC (LOW)
Maximum voltage on the circuit breaker coil that does not lead to tripping
If the calculation results in R
max
< R
min
, the calculation must be repeated, with the next lowest switching
threshold V
BI min
, and this threshold must be implemented in the relay using plug-in jumpers (see Section
“Hardware Modifications”).
For the power consumption of the resistance:
[formel-leistungvon-r-260602-kn, 1, en_US]
Example:
Ι
BI (HIGH)
1.8 mA (vom SIPROTEC 4 7SJ62/64)
V
BI min
19 V for delivery setting for nominal voltages of DC 24 V/ 48 V/ 60 V/ 125 V
(of the device 7SJ62/64)
88 V for delivery setting for nominal voltages of DC 110 V to 220 V and AC 115 V bis 250 V
(of the device 7SJ62/64)
176 V for delivery setting for nominal voltages of DC 110 V to 220 V and AC 115 V bis 230 V
(of the device 7SJ62/64)
V
CTR
110 V (system / release circuit)
R
CBTC
500 Ω (from system / trip circuit)
V
CBTC (LOW)
2 V (system / release circuit)
Mounting and Commissioning
3.1 Mounting and Connections
SIPROTEC 4, 7SJ62/64, Manual 369
C53000-G1140-C207-8, Edition 08.2016
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