Siemens Argus 7SR21 - Page 573

7SR210 & 7SR220 Commissioning & Maintenance Guide
© 2013 Siemens Protection Devices Limited Page 61 of 82
2.12 Sensitive Power (32S)
46
BC
46
NPS
(x2)
37
(x2)
49
50
BF
V
L1
(V
A
)
V
L2
(V
B
)
V
L3
(V
C
)
V
4
(V
X
)
I
L1
(I
A
)
81
HBL
2/5
37
(x2)
49
50
BF
I
L2
(I
B
)
81
HBL
2/5
37
(x2)
49
50
BF
I
L3
(I
C
)
81
HBL
2/5
60
CTS
I
4
(I
G
)
I
5
(I
SEF
)
74
TCS
NOTE: The use of some
functions are mutually exclusive
67/
50/51
(x4)
67/
50/51N
(x4)
67/
50/51
(x4)
67/
50/51
(x4)
67/
50/51G
(x4)
67/
50/51S
(x4)
64
H
27
59
27
59
(x4)
27
59
(x4)
27
59
(x4)
47
(x2)
81
(x6)
79
Optional
59N
(x2)
81
HBL
2/5N
37G
(x2)
37S
(x2)
51c
60
CTS-
I
60
CTS-
I
60
CTS-
I
37
50
BF
37
50
BF
25
50
AFD
50
AFD
50
AFD
51c
51c
51c
32S
(x2)
32
(x2)
55
21
LB
21
LB
21
LB
51V
21FL
60
VTS
51V
51V
Figure 2.12-1 Sensitive Power
Voltage Inputs: V
L1
(V
A
), V
L2
(V
B
), V
L3
(V
C
)
Current Inputs: I
4
(I
SEF
)
Disable: 27
Map Pickup LED: 32S-n - Self Reset
This function can be tested by application 1P current and 3P voltage. For Over-power, the elements with the
highest setting should be tested first and for Under-power the elements with the lowest settings should be tested
first. The elements with other settings can then be tested without need to disable the elements already tested.
From the nominal power setting Sn gradually increase/decrease applied voltage or current until 32S-n operation
occurs.
If the 32S-n Delay setting is long it will be advantageous to map the function to temporarily drive the relevant
Pickup output in the Output Config > Pickup Config menu. This will allow the Pick-up led to operate for the
function. If the delay setting is short the operation of the element can be easily checked directly.
The current or voltage should then be decreased/increased until the element resets.
If the element is set as 32S-n U/C Guarded, The applied current must be above the 32S U/C Guard Setting.
Apply setting power +10% for Over-power or -10% for Under-power and record operating time.