Transmission Owner Guidelines Transmission owner technical guidelines and recommendations are listed below and are published by the Transmission and Substation Subcommittee (TSS.) The documents included here are still subject to PJM's review and may thus potentially change before being formally published pursuant to the Open Access Transmission Tariff WEB | PDF - Section 1.2C. These documents were originally developed for PJM by the TSS member companies when PJM’s footprint matched the North American Reliability Corporation (NERC) MAAC region (contributing companies included AE, BGC, DPL, JCPL, MetEd, PECO, PENELEC, PEPCO, PPL and PSEG.) Many of these companies often reference these documents for their technical requirements and standards as defined in the PJM tariff. PJM now extends into multiple NERC regions. New members typically reference their own documents and therefore these documents no longer represent all of PJM. However, all PJM members are welcome to reference these documents. Date I. Introduction - Technical Requirements & Design Philosophy PDF 12.2017 I.3 Recommendations of Resilience and System Hardening Practices PDF 7.22.2021 II. Transmission System Design Criteria PDF 12.2017 III. Substation Bus Configuration & Substation Design Requirements PDF 12.2017 IV. Spare Equipment Philosophy PDF 12.2017 V. Design, Application, Maintenance & Operation Technical Requirements a. Overhead Transmission Lines PDF 12.2017 b. Power Cables PDF 12.2017 c. Large Power Transformers PDF 12.2017 d. Circuit Breakers PDF 5.2022 e. Load Interrupting Switches (Circuit Switches) PDF 12.2017 f. Disconnects & Switches PDF 12.2017 g. Shunt Capacitors PDF 12.2017 h. Instrument Transformers PDF 12.2017 i. AC Station Service PDF 12.2017 j. Substation Batteries & Chargers PDF 12.2017 k. DC Substation Service PDF 12.2017 l. Substation Operation & Maintenance PDF 12.2017 m. Carrier Current Line Traps PDF 12.2017 n. Insulation Coordination & Surge Protection PDF 12.2017 o. Relay and Control Building Requirements PDF 12.2017 p. Static Var Compensators (SVC) PDF 12.2018 VI. Rating Guides a. Bare Overhead Transmission Conductor Ratings PDF 10.2022 OHT Cond Rating - Spreadsheet XLS 4.26.2024 b. Power Transformers PDF 9.18.2024 c. Circuit Breakers PDF 9.18.2024 Circuit Breaker Ratings - Spreadsheets XLS 11.21.2024 d. Air Disconnect Switches PDF 12.11.2024 e. Outdoor Substation Conductor Ratings PDF 12.11.2024 PJM Bus Rating - Spreadsheet XLS 12.11.2024 f. Current Transformers PDF 4.11.2025 g. Line Traps PDF 3.2012 h. Underground and Submarine Transmission Cable Rating Methodology PDF 9.17.2015 VII. Installation & Commissioning PDF 12.2017 VIII. Inspection, Testing & Acceptance PDF 12.2017 Annexes A. System Phasing Diagrams PDF 9.18.2024 B. Definitions PDF 6.2002