7SR10 Description of Operation
©2018 Siemens Protection Devices Limited Chapter 1 Page 67 of 77
Inhibit 46BC
46BC
46BC Element
Enabled
Disabled
c
&
46BC Setting
IL1
IL2
IL3
NPS
Filter
I2
IL1
IL2
IL3
PPS
Filter
I1
46BC Delay
46BC U/C Guard
Setting
46BC U/C
Guarded
Yes
No
C
IL1
IL2
IL3
Figure 5-7 Logic Diagram: Broken Conductor Function (46BC)
5.7 Trip/ Close Circuit Supervision (74TCS & 74CCS)
The relay provides three trip and three close circuit supervision elements, all elements are identical in operation
and independent from each other allowing 3 trip and 3 close circuits to be monitored.
One or more binary inputs can be mapped to
74TCS-n.
The inputs are connected into the trip circuit such that at
least one input is energised when the trip circuit wiring is intact. If all mapped inputs become de-energised, due to
a break in the trip circuit wiring or loss of supply an output is given.
The
74TCS-n Delay
setting prevents failure being incorrectly indicated during circuit breaker operation. This delay
should be greater than the operating time of the circuit breaker.
The use of one or two binary inputs mapped to the same Trip Circuit Supervision element (e.g. 74TCS-n) allows
the user to realise several alternative monitoring schemes.
TCS-n
Enabled
Disabled
&
74TCS-n
74TCS-n
74TCS-n Delay
≥1
74TCS-n
NOTE: Diagram shows two binary inputs mapped
to the same Trip Circuit Supervision element
Figure 5-8 Logic Diagram: Trip Circuit Supervision Feature (74TCS)
CCS-n
Enabled
Disabled
&
74CCS-n
74CCS-n Delay
≥
1
74CCS-n
NOTE: Diagram shows two binary inputs mapped
to the same Close Circuit Supervision element
74CCS-n
Figure 5-9 Logic Diagram: Close Circuit Supervision Feature (74CCS)
Summary of Contents for 7SR10 Argus Series
Page 1: ...7SR10 Argus Overcurrent Relay Reyrolle Protection Devices ...
Page 2: ...Siemens Protection Devices Limited 2 ...
Page 152: ...7SR10 Technical Manual Chapter 4 Page 2 of 78 2018 Siemens Protection Devices ...
Page 156: ...7SR10 Technical Manual Chapter 4 Page 6 of 78 2018 Siemens Protection Devices ...
Page 188: ...7SR10 Technical Manual Chapter 4 Page 38 of 78 2018 Siemens Protection Devices ...
Page 216: ...7SR10 Technical Manual Chapter 4 Page 66 of 78 2018 Siemens Protection Devices ...
Page 218: ...7SR10 Technical Manual Chapter 4 Page 68 of 78 2018 Siemens Protection Devices ...
Page 220: ...7SR10 Technical Manual Chapter 4 Page 70 of 78 2018 Siemens Protection Devices ...
Page 222: ...7SR10 Technical Manual Chapter 4 Page 72 of 78 2018 Siemens Protection Devices ...