Voltage Transformer Supervision (60Vts); Or 2 Phase Vt Fail - Siemens 7SR224 Technical Manual
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3.2
Voltage Transformer Supervision (60VTS)
Figure 3-2
Voltage Transformer Supervision
Voltage Inputs:
Current Inputs:
Disable:
27, 47, 59N
Map Pickup LED:
3.2.1
1 or 2 Phase VT fail
Apply 3P balanced nominal current and voltage. Reduce 1 phase voltage until VTS operates, record voltage
reduction level.
60VTS V Setting
Increase the voltage until VTS resets. Increase current on 1 phase by 110% of 3x the 60VTS I setting. Reduce
voltage as above and check for no operation. Return voltage to nominal. Increase current on 1 phase by 90% of
3x the 60VTS I setting. Reduce voltage as above and check for VTS operation
60VTS I Setting
©2010 Siemens Protection Devices Limited
37
50
49
(x2)
BF
I
L1
(I
)
A
37
50
49
(x2)
BF
I
L2
(I
)
B
37
50
49
(x2)
BF
I
L3
(I
)
C
46
46
60
NPS
BC
CTS
(x2)
67/
64
50G
H
I
(x4)
4
(I
/I
)
G
SEF
NOTE: The use of some
functions are mutually exclusive
27
V
27S
L1
59
(V
)
59S
A
(x4)
27
V
27S
L2
59
(V
)
59S
B
(x4)
27
V
27S
L3
59
(V
)
59S
C
(x4)
V
27
4
(V
)
59
X
V
(V
), V
(V
), V
L1
A
L2
B
L3
I
(I
), I
(I
), I
(I
),
L1
A
L2
B
L3
C
60VTS - Self Reset
Setting x 3
Setting x 3
110% of Setting x 3
No VTS □
7SR224 Argus Commissioning & Maintenance Guide
7SR224
67/
67/
81
51V
50
51
HBL
(x4)
(x4)
2
67/
67/
81
51V
50
51
HBL
(x4)
(x4)
2
67/
67/
81
51V
50
51
HBL
(x4)
(x4)
2
60
VTS
67/
67/
67/
51G
50S
51S
(x4)
(x4)
(x4)
Note:
Example shows
Voltage Config =
47
81
Van, Vbn, Vcn
(x2)
(x4)
74
Batt
59N
TCS
(x2)
Test
(x3)
Cap.
79
Test
(V
)
C
Measured Voltage Reduction
90% of Setting x 3
VTS operation □
Chapter 6 Page 55 of 73
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