7SR210 & 7SR220 Commissioning & Maintenance Guide
© 2013 Siemens Protection Devices Limited
Page 73 of 82
3.5
Load Blinder (21)
7SR22
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
37
(x2)
49
50
BF
I
L2
(I
B
)
81
HBL
2
37
(x2)
49
50
BF
I
L3
(I
C
)
81
HBL
2
60
CTS
I
4
(I
G
)
I
5
(I
SEF
)
74
TCS
NOTE: The use of some
functions are mutually exclusive
67 / 50 /
51( x 4 )
67/
50 /51N
( x 4 )
67/
50/51G
( x 4 )
67/
50/51S
( x 4 )
64
H
27
59
27
59
(x4)
27
59
(x4)
27
59
(x4)
47
(x2)
81
(x6)
79
Optional
59N
(x2)
81
HBL
2N
60
VTS
51V
51V
51V
37G
(x2)
37S
(x2)
51c
60
CTS-
I
60
CTS-
I
60
CTS-
I
37
50
BF
37
50
BF
25
21
LB
21
LB
21
LB
51c
51c
51c
50
AFD
50
AFD
50
AFD
67 / 50 /
51( x 4 )
67 / 50 /
51( x 4 )
Figure 3.5-1
Load Blinder (21)
Voltage Inputs:
V
L1
(V
A
), V
L2
(V
B
), V
L3
(V
C
)
Current Inputs:
I
L1
(I
A
), I
L2
(I
B
), I
L3
(I
C
),
Disable:
51-n, 51V, 51c, 46, 49, 50BF, 79
Map Pickup LED:
21LB-3P, 21LB-1P - Self Reset
Load Blinders are designed to block Overcurrent elements from tripping in heavy load conditions.
User settings
21LB-3P Angle
and
21LB-3P Impedance
allow user to define the Blinder region depending on the
networks or specifically a line’s loading and fault limits.
The calculated impedance can be: -
·
In Blinder Region in which case the
Load Blinder FWD
or
REV
is active depending on if the impedance is
in the 1
st
or 4
th
and/or 2
nd
or 3
rd
quadrant of the R-X plot respectively.
·
In operate region in which case there is no active Load Blinder block and the Overcurrent element
operates depending on additional factors.
·
A 5 degree Hysteresis is allowed between operate and block zone.
Summary of Contents for Argus 7SR21
Page 1: ...Energy Management 7SR21 7SR22 Argus Overcurrent Relay Reyrolle Protection Devices ...
Page 2: ......
Page 4: ...Contents 7SR11 and 7SR12 Page 2 of 2 2018 Siemens Protection Devices Limited ...
Page 185: ...7SR210 Settings Guide Unrestricted 2018 Siemens Protection Devices Limited Page 61 of 61 ...
Page 277: ...7SR220 Settings Guide Unrestricted Page 72 of 107 2013 Siemens Protection Devices Limited ...
Page 382: ...7SR220 Technical Manual Chapter 4 Page 2 of 96 2017 Siemens Protection Devices Limited ...
Page 386: ...7SR220 Technical Manual Chapter 4 Page 6 of 96 2017 Siemens Protection Devices Limited ...
Page 398: ...7SR220 Technical Manual Chapter 4 Page 18 of 96 2017 Siemens Protection Devices Limited ...
Page 414: ...7SR220 Technical Manual Chapter 4 Page 34 of 96 2017 Siemens Protection Devices Limited ...
Page 466: ...7SR220 Technical Manual Chapter 4 Page 86 of 96 2017 Siemens Protection Devices Limited ...
Page 468: ...7SR220 Technical Manual Chapter 4 Page 88 of 96 2017 Siemens Protection Devices Limited ...
Page 470: ...7SR220 Technical Manual Chapter 4 Page 90 of 96 2017 Siemens Protection Devices Limited ...
Page 472: ...7SR220 Technical Manual Chapter 4 Page 92 of 96 2017 Siemens Protection Devices Limited ...
Page 643: ...Unrestricted ...