Sensitive Power (32S) - Siemens 7SR12 Argus Manual

7SR11 & 7SR12 Commissioning and Maintenance Guide

2.17 Sensitive Power (32S)

I (I )
L1 A
I (I )
L2 B
I (I )
L3 C
I (I )
4 G
V (V )
L1 A
V (V )
L2 B
V (V )
L3 C
Voltage Inputs:
Current Inputs:
Disable:
Map Pickup LED:
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.
©2017 Siemens Protection Devices Limited
37 32 50
49
(x2) (x2) BF
37 32 50
49
(x2) (x2) BF
37 32 50
49
(x2) (x2) BF
46
60
46
NPS
CTS
BC
(x2)
32S 50BF
NOTE: The use of some
27
functions are mutually exclusive
59
(x4)
27
47
81 59N
59
(x2)
(x4) (x2)
(x4)
27
59
(x4)
Optional
79
Figure 2-20 Sensitive Power
V (V ), V (V ), V (V )
L1 A L2 B L3 C
I (I )
4 SEF
27
32S-n - Self Reset
50 67/ 67/
55
AFD 51V 50 51
(x2)
(x2) (x4) (x4)
50 67/ 67/
55
AFD 51V 50 51
(x2)
(x2) (x4) (x4)
50 67/ 67/
55
AFD 51V 50 51
(x2)
(x2) (x4) (x4)
67/ 67/
60
50N 51N
VTS
(x4) (x4)
67/ 67/
50 G/ 51 G/
SEF SEF
Note:
Example shows
Voltage Config =
Van, Vbn, Vcn
74
T/
CCS
7SR12
81
HBL 51c
2
81
HBL 51c
2
81
HBL 51c
2
64H
Chapter 6 Page 56 of 72