POC and Intertie Devices

• Rules for Electric Meter & Service Installations (REMSI)

• Applies for applications before 9/1/23 
  Point of Common Coupling Requirements for Distribution Voltage Customer-Owned Facilities 12 kV Supply REV. 1, 2/2023 (.pdf) 
  

• Applies for applications on or after 9/1/23 
  Point of Common Coupling Requirements for Distribution Voltage Customer-Owned Facilities 12 kV Supply REV. 2, 9/1/2023 (.pdf) 

Submission of equipment drawings should include the following:

A complete facility one-line with:

• Point of utility/customer demarcation shown.
• All customer owned transformers with nominal data shown.
• All customer owned generation with nominal data shown.
• All POC/IPR protection with Manufacturer and Model shown.
• All Current Transformers (CTs) and Potential Transformers (PTs) shown
• All lightning arrestors, disconnects and interlocks shown.
• All equipment designations shown.

A three line diagram with:

• All power transformer connections shown
• All CT and PT connections shown

All pertinent current, potential and control elementary diagrams

The exact make and model of all POC and IPR devices

1. The customer POC and IPR protective devices must be independent and used only for isolation of the customer’s facilities from the PPL power system. The POC and IPR protective devices and their respective CTs and PTs may not be used for any other protection or energy metering of customer equipment.
2. Simplicity and ease of maintenance/testing is a primary goal. The POC and IPR protective device installations must include facilities (sliding links or FT test switches) to isolate the relays for testing. AC currents, AC potentials, and all input and output contacts must be fully isolated by these facilities. AC current isolation must include current circuit shorting provisions.
3. When microprocessor based multi-element phase and ground relays are used for POC protection it is preferable that a second backup relay be installed in case the first relay fails. If a second relay is not installed the failure alarm of the installed relay will need to be connected in the trip path.
4. When single element relays are used three separated phase relays and one ground relay will be sufficient.
5. All CTs must be multi-ratio with a class rating of C200 or higher. Installation of a lower class CT will require a CT saturation study to be provided by the customer.
6. All installations which require a POC protective device or IPR relay must be fully comply with the REMSI document, the Point of Contact Requirement for High Voltage Customers document and the Customer Owned Generator Interconnection requirements. In addition each installation must be reviewed accepted by PPL.