Siemens Argus 7SR21 Technical Manual page 567

2.10.5 Neutral Overvoltage (59N)
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:.
The voltage source for the Neutral Overvoltage 59N function can be set as either Vn , calculated from the applied
3 phase voltage inputs or Vx, the V
2.10.6 Definite Time (59NDT)
If DTL setting is small, gradually increase single phase voltage until element operates.
If DTL is large apply 0.9x setting, check for no operation, apply 1.1x setting, and check operation.
Apply 2x setting voltage if possible and record operating time.
© 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 2.10-4
V (V ), V (V ), V
L1 A L2 B
n/a apply zero current to stabilize other functions
27/59, 47, 60VTS
59N-n - Self Reset
input. Apply test voltage to 1 phase input or V
4
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
Neutral Overvoltage
(V )
L3 C
81
51c HBL
2
81
51c HBL
2
81
51c HBL
2
81
HBL
2N
37G
(x2)
37S
(x2)
input to suit.
4
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