What might a Transmission Owner be required to do if an EHV substation RTU becomes unavailable?

If an Extra High Voltage (EHV) substation Remote Terminal Unit (RTU) becomes unavailable, sending staff to telephone information to the Transmission Owner and to PJM is critical for maintaining operational integrity and ensuring that all stakeholders are informed about the situation. Communication is essential in these scenarios to relay critical data regarding system status, operational changes, or safety concerns.

The RTU is vital for monitoring and controlling substation operations, so its unavailability could result in a gap in real-time data transmission. By promptly contacting both the Transmission Owner and PJM, the staff can provide necessary updates and receive guidance on immediate measures to mitigate the situation. This step helps maintain system reliability and prevents misinformation or delays that could escalate operational problems.

While other options such as inspecting the substation or closing it may be considered, they do not prioritize immediate communication, which is crucial in the event of an equipment failure. Email communication, while important, may not ensure immediate attention compared to a telephone call during critical situations like a system outage. Therefore, the choice to phone in information is the most effective course of action in this context.