TESTING A DIGITAL VOLTAGE /FREQUENCY RELAY

Commissioning 1. Perform a metering check on all analog current and voltage channels 2. Perform a function test of all digital inputs and outputs. 3. Perform a relay self-test 4. Test each element enabled in output logic using: 5. Steady State for pickup testing, simple dynamic testing for timing, and logic testing, OR 6. Combine Pickup, Timing Tests, and Logic Testing, OR 7. Dynamic System-Model Testing

Maintenance Testing 1. Perform a metering check on all analog current and voltage channels 2. Perform a function test of all digital inputs. 3. Perform a relay self-test 4. Perform a trip test for each output by applying one logic test for each enabled output, OR 5. Perform Logic Testing, OR 6. Combine Pickup, Timing Tests, and Logic Testing, OR 7. Dynamic System-Model Testing

To test the under voltage you will need to make a sequence using Delta Ramp, start with the

nominal voltage and slowly decreasing the voltage until the relay trips.

To test the overvoltage you will need to make a sequence using Delta Ramp, start with the nominal

voltage and slowly increasing the voltage until the relay trips.

To test the under frequency you will need to make a sequence using Delta Ramp, start with the

nominal frequency and slowly decreasing the frequency until the relay trips.

To test the over frequency you will need to make a sequence using Delta Ramp, start with the

nominal frequency and slowly increasing the frequency until the relay trips.