LRU FRICK Motor Protection Relay Upgrade

1. My first project is:

My first project is a LRU FRICK motor protection relay upgrade where I was assigned to submit a PRF to upgrade a GE Multilin 469 Relay to a SEL 710-5 Relay. 

2. The SEL 710-5 Relay is:

The SEL 710-5 Relay is essentially a newer model of the 469 since they are more reliable and flexible, allowing us to configure the relay to offer more protection than the Multilin 469. The 469 also is due for an upgrade since GE has discontinued the production of 469 relays

3. In this project, I was given three main tasks:

In this project, I was given three main tasks: (1) create an IFC and Demo Package, (2) configure the new relay settings, and (3) submit a PRF form  

4. After preparing the IFC and Demo drawings for future construction,:

After preparing the IFC and Demo drawings for future construction, I verified thermal curves to make sure the trip settings in the new relay are correct.  

5. Thermal curves are graphical models that:

Thermal curves are graphical models that plots time on the X-axis and current on the Y-axis, which helps us determine a safe range that the motor can start and run at and ensures the motor does not impact or overlap any other equipment.

6. The last stage is:

The last stage is to complete a PRF request form.  

7. This upgrade is important because:

This upgrade is important because a motor protection relay failure can lead to a motor failure.  

8. In this case, the relay that protects:

In this case, the relay that protects the motor against adverse issues, such as thermal damage and overcurrent, by communicating and relaying information with the circuit breaker to prematurely trip the motor prior to failure.  

9. If the motor protection relay does not function properly,:

If the motor protection relay does not function properly, a failure could occur in the motor, thus leading result in a shutdown of the LRU and an LPO of 3 to 8 weeks depending on the damage to the motor.  

10. To prevent a potential motor failure and unit shutdown,:

To prevent a potential motor failure and unit shutdown, it is critical that the motor protection relay does not fail, which is what this upgrade from the 469 to 710-5 ensures.