Vx Under/Over Voltage (Vx 27/59) - Siemens 7SR224 Technical Manual

2.12.3 V Under/Over Voltage (Vx 27/59)
X
I
(I /I
G
V
(V
V
(V
V
(V
(V
Figure 2-14 Vx Under/Over Voltage
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.
Phas 27/59 U/ DTL
e settin O (sec)
g
(Volts)
V (V
4 x
)
©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
(x4)
4
)
SEF
NOTE: The use of some
functions are mutually exclusive
27
27S
L1
59
) 59S
A
(x4)
27
27S
L2
59
) 59S
B
(x4)
27
27S
L3
59
) 59S
C
(x4)
V 27
4
) 59
X
V (V )
4 X
n/a apply zero current to stabilize other functions
Vx 27/59 - Self Reset
Hyst. D.O.
(calculated
)
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
59N Batt
TCS
(x2) Test
(x3)
Cap.
79
Test
P.U. D.O Op. Time
Volts Volts 2x Vs (OV)
0.5x Vs
(UV)
UV NOTES
Guard
Chapter 6 Page 45 of 73