7SR10 Description of Operation
©2018 Siemens Protection Devices Limited Chapter 1 Page 65 of 77
Enabled
Disabled
&
60VTS Element
&
&
> 1
60VTS Ext_Trig
&
S
R
Q
>1
60VTS Operated
&
60VTS Inhibit
1 or 2 Phase Fail
V
V Setting
>
I
I Setting
>
V1
Vpps Setting
<
I1
Ipps
<
3 Phase Fail
I1
Ipps Load
>
External Trigger
60VTS Ext_Reset
External Reset
60VTS Delay
NPS/ZPS
60VTS
Component
VL1
VL2
VL3
Phase
Seq.
Filter
IL1
IL2
IL3
Phase
Seq.
Filter
V2
V0
I2
I0
V1
I1
Figure 5-4 Logic Diagram: VT Supervision Function (60VTS)
5.5 CT Supervision (60CTS)
The relay has two methods of detecting a CT failure. CT Supervision is only available in relays with four current
inputs and three voltage inputs.
5.5.1 60CTS-I
The current from each of the Phase Current Transformers is monitored. If one or two of the three input currents
falls below the CT supervision current setting
CTS I
for more than
60CTS Delay
then a CT failure output (
60CTS
Operated
) is given. If all three input currents fall below the setting, CT failure is not raised.
An output is also given to indicate the faulted phase,
60CTS-I PhA
,
60CTS-I PhB, and 60CTS-I PhC
Operation of the CT supervision elements can be inhibited from:
Inhibit 60CTS
A binary or virtual input.
Содержание 7SR10 Argus Series
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