Siemens Argus 7SR21 Technical Manual page 563

2.10.3 V Under/Over Voltage. (Vx 27/59)
X
I
L1
(I )
A
I
L2
(I )
B
I
L3
(I )
C
I
4
(I )
G
I
5
(I )
SEF
V
L1
(V )
A
V
L2
(V )
B
V
L3
(V )
C
V
4
(V )
X
Voltage Inputs:
Current Inputs:
Disable:
Map Pickup LED:.
If DTL setting is small, gradually increase single phase voltage applied to Vx input until element operates if the
element is Overvoltage. Alternatively, if the element is Undervoltage, increase single phase voltage applied to Vx
input until element operates.
If DTL is large, for Overvoltage elements, apply 0.9x setting, check for no operation, apply 1.1x setting, check
operation. For Undervoltage elements, apply 1.1x setting, check for no operation, apply 0.9x setting, check
operation.
Apply 2x setting voltage if possible and record operating time.
Starting with the element in the operated condition, gradually increase or decrease the applied voltage until the
element resets. Measure the reset voltage level to check the 27/59 Hysteresis setting.
© 2013 Siemens Protection Devices Limited
37 50
49
(x2) BF
37 50
49
(x2) BF
37 50
49
(x2) BF
46
46 60
NPS
BC CTS
(x2)
50
37
BF
50
37
BF
NOTE: The use of some
functions are mutually exclusive
27
59
(x4)
27
47
59
(x2)
(x4)
27
59
(x4)
27
59
Optional
79 25
Figure 2.10-2
V (V )
4 X
n/a apply zero current to stabilize other functions
Vx 27/59 - Self Reset
7SR210 & 7SR220 Commissioning & Maintenance Guide
7SR22
60 67/ 67/
50
CTS- 51V 50 51
AFD
I (x4) (x4)
67/ 67/
60
50
51V 50 51
CTS-
AFD
I (x4) (x4)
67/ 67/
60
50
51V 50 51
CTS-
AFD
(x4) (x4)
I
67/ 67/
60
50N 51N
51c
VTS
(x4) (x4)
67/ 67/
50G 51G
(x4) (x4)
67/ 67/
64
50S 51S
H
(x4) (x4)
81
(x6)
59N 74
(x2) TCS
Vx Under/Over Voltage
81
51c HBL
2
81
51c HBL
2
81
51c HBL
2
81
HBL
2N
37G
(x2)
37S
(x2)
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