Setting For Trip Circuit Monitor; Information - Siemens SIPROTEC 7SJ62 Instruction Manual

6.17.6.1 Setting for Trip Circuit Monitor

Addr. LCD-Text
8201 FCT 74TC

6.17.6.2 Information

F# LCD-Text
6861 74TC OFF
6862 74TC BLOCKED
6863 74TC ACTIVE
6864 74TC ProgFail
6865 FAIL: Trip cir.
6851 >BLOCK 74TC
6852 >74TC trip rel.
6853 >74TC brk rel.
7SJ62 Manual
C53000-G1140-C121-1
Example:
I
1.8 mA (from SIPROTEC
BI (HIGH)
U
19 V for delivery setting for nominal voltage 24/48/60 V (from SIPROTEC
BI min
88 V or delivery setting for nominal voltage 110/125/220/250 V) (from SIPROTEC
V 110 V (from system / release circuit)
ST
500 Ω (from system / release circuit)
R
CBTC
V 2 V (from system / release circuit)
CBTC (LOW)

110 V 19 V
–
--------------------------------- -
R =

max
1.8 mA

110 V 2 V
500 Ω ⋅
----------------------------- -
R =

min
2 V
R + R
max min
------------------------------- -
R = = 38.6 kΩ
2
The closest standard value of 39 kΩ is selected; the power is:

110 V
--------------------------------------- -
P =

R
39 kΩ + 0.5 kΩ
≥
P 0.3 W
R
Setting Options
ON
OFF
74TC Trip circuit supervision OFF
74TC Trip circuit supervision is BLOCKED
74TC Trip circuit supervision ACTIVE
74TC blocked Bin. input is not set
74TC Failure Trip Circuit
>BLOCK 74TC
>74TC Trip circuit superv.: trip contact
>74TC Trip circuit superv.: breaker aux. contact
®
7SJ62)

500 Ω
– = 50.1 kΩ


–
= 27 kΩ

2

⋅
39 kΩ

Default Setting
ON
Comments
®
7SJ62)
Comments
Status of Trip Circuit Monitoring
Functions
®
7SJ62)
6-159