Siemens Argus 7SR21 Technical Manual page 587

3.5.1 D
ETERMINING
Test Procedure (Using Omicron Relay Test Set)
1. Set-up the relay with default or appropriate parameter settings.
2. Set-up Omicron current and voltage settings e.g. 63.5 V and 0.5 A three-phase.
3. Select all three currents and set an appropriate initial angle for rotation on the Omicron.
4. Apply Omicron current and voltage to the relay.
5. Using the PC mouse click the appropriate arrow '
(positive degree) direction.
6. View the LEDs for indication of Load Blinder operation as the angle moves out-of or into the Load Blinder
region.
7. Rotating the angle in an anti-clockwise direction will see the LEDs extinguish, this indicates the drop-off
point of the Load Blinder region. Record the angle as Point1 in the table of values.
8. Rotating the angle from this point in a clockwise direction will see the LEDs illuminate which indicates the
pick-up point of the Load Blinder region. Record the angle as Point 2 in the table of values.
9. Continue this process to find the other boundaries. See Error! Reference source not found. below.
Angle data points (b and c) Default Settings
Load Blinder
region
PU (Raised)
Angle
Angle limits (b and c). Typical values.
Load Blinder
region
PU (Raised)
Angle
© 2013 Siemens Protection Devices Limited
L B R
OAD LINDER
Forward (+) Boundary
Angle = 20 (b)
DO (Reset)
Point 2 Point 1
Forward (+) Boundary
Angle = 20 (b)
DO (Reset)
20
7SR210 & 7SR220 Commissioning & Maintenance Guide
(21LB)
EGIONS
' to rotate the angle of current in the anti-clockwise
PU (Raised)
PU (Raised)
21
Forward (-) Boundary
Angle = 340 (-20) (c)
DO (Reset)
Point 3 Point 4
Foreward (-) Boundary
Angle = 340 (-20) (c)
DO (Reset)
340
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