7SR210 & 7SR220 Commissioning & Maintenance Guide
Page 16 of 82
© 2013 Siemens Protection Devices Limited
V
C
V
B
V
A
I
A
With balanced 3-phase system quantities:
Adjust the phase angle of the currents
relative to the voltages:
Verify directional pick-up and drop off at
points A, B, C and D
Alternatively,
Verify correct directional indication at points
a, b, c and d (C.A +75
0
, +95
0
, -75
0
, -95
0
)
A
B
D
C
a
d
b
c
FWD
REV
+60
0
+30
0
0
0
+270
0
+180
0
+210
0
+240
0
+90
0
V
BC
Forward
Reverse
Lag (point C)
Lead (point A)
Lead(point B)
Lag (point D)
Pick-up
Drop-off
Pick-up
Drop-off
Pick-up
Drop-off
Pick-up
Drop-off
MTA
MTA-85
MTA+85
MTA-85
MTA-85
Phase A
Phase B
Phase C
Figure 2.1-1
Directional Phase Fault Boundary System Angles
4. With the instrument reading ‘Fwd’ or ‘Rev’, reduce the voltage until the element resets. Record the
minimum phase-phase operate voltage.
Minimum Voltage Setting
Measured
2.1.1 2 out of 3 logic
Ensure that at least 1 Phase Overcurrent element is set to Directional. Apply balanced nominal voltage. Apply
current at a level above on phase A only at the characteristic angle for forward operation, normally 45º lagging.
Ensure no Directional Phase Overcurrent element operation occurs. Note that non-directional Phase Overcurrent
and Non-direction Earth Fault elements may operate unless disabled.
Repeat the test with Phase A current as above but also with equal current in the B phase at 180º to that in the A
phase.
1 phase current
2 phase current
No 50/51-n Operation
50/51-n operation
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 ...