7SR210 & 7SR220 Commissioning & Maintenance Guide
Page 76 of 82 © 2013 Siemens Protection Devices Limited
3.5.2 DETERMINING TRIP LEVEL
Test Procedure (Using Omicron Relay Test Set)
1. Set-up the relay with default or appropriate parameter settings (see table below).
2. Set-up Omicron current and voltage settings e.g. 63.5 V and 1.0 A three-phase.
3. Select all three currents and set an appropriate initial current level for increase on the Omicron.
4. Apply Omicron current and voltage to the relay.
5. Using the PC mouse click the appropriate arrow ‘ ’ to adjust current level.
6. View the LEDs for indication of Load Blinder operation as the current increases out-of the Load Blinder
region. This is the DO point 5.
7. View the LEDs for indication of Load Blinder operation as the current decreases into the Load Blinder
region. This is the PU point 6.
Trip Level I = Vs / Z Default Settings
Point 5 Point 6
Trip Level I = Vs / Z. Typical values.
1.591 A 1.511 A
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