148 Rockwell Automation Publication 825-UM004D-EN-P - November 2012
Chapter 11 Testing & Troubleshooting
• PC with Serial Port, MPS Explorer software, and serial communication
cable
• Te
rm i n a l E m u l a t i o n S o f t w a r e
• Serial Communication Cable
• AC and DC Elementary Schematics
• Wiring Diagrams (for this relay installation)
• Continuity Tester
• Protective Relay AC Test Source
– Minimum: single-phase voltage and current with phase angle control
– Preferred: three-phase voltage and current with phase angle control
Procedure
1. Remove the control voltage and AC signals from the 825-P by opening the
appropriate breakers or removing fuses.
2. Isolate the relay trip contact.
3. Verify the correct AC and DC connections by performing point-to-point
co
ntinuity checks on the associated circuits.
4. Apply AC or DC control voltage to the relay.
5. After the relay is energized, the front panel green ENABLE LED
ill
uminates.
6. Connect a PC to the relay using an appropriate serial cable.
7. Start the MPS Explorer software and establish communication with the
relay
.
8. Set the correct relay time and date using either the front panel or MPS
Expl
orer software.
9. En
ter the relay settings for your application.
10. If you are connecting an external RTD scanner, follow the substeps below;
othe
rwise continue with Step 11.
a. Connect the fiber optic cable to the module fiber optic output.
b. Plug the relay end of the fiber optic cable into the relay fiber optic input.
11. Verify the relay AC connections.
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