The 2008 Revision of IEEE C37.2 Standard Electrical Power System ...

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• GC • POTT • PUTT • SOTF • TD • Z Ground check Permissive overreaching transfer trip Permissive underreaching transfer trip Switch on to fault Time delay Impedance Device 11 List Box - During the balloting, one engineer voted Negative and attached a strongly worded statement of how ineffective the existing methods (empty box and filled box methods) were to represent the contents of a multifunction Device 11 on elementary diagrams. He also attached a copy of a method he had been using, which he called the “List Box” Method, as it provided a way to list all the functions in and connections to a multifunction device. The example he provided was for the center breaker in a breaker and half scheme with synch check reclosing from one source and breaker failure initiate to back up breakers. The example of Figure 5 is now in the standard. The XXXX at the bottom of the diagram is a place holder for the manufacturer’s model number. CT CT VT VT VT 1 1 11LA-1209 85POTT 21P/N 67N SOTF 50BF-108 50BF-118 01A-108 25A-108 01A-118 25A-118 79 SER/DFR ALARM HMI/SCADA PILOT TX/RX IRIG-B 52a-108 52a-118 CLOSE 108 CLOSE 118 TRIP TC1 108 TRIP TC1 118 BFI-108 BFI-118 TRIP 86F-108 NOTES: 1. AC sensing connections are 3-Phase unless otherwise marked. 2. Functions apply to the multifunction device’s designated zone of protection unless otherwise marked. 3. A/B designate System A and System B of the fully redundant system. 4. Device 01 is manual control of the designated power system element. 01A is local HMI and panel control. 01B is remote SCADA control. TRIP 86F-118 XXXX Figure 5 - List Box Method for Device 11
Approval Process The balloting invitation for PC37.2-2008 went to a wider range of IEEE groups than has been customary for Power Engineering Society (oops – our new title is “Power and Energy Society”). In addition to the usual Power Systems Relaying Committee, Power Systems Communications Committee and Substations Committee, the invitation was sent to the IEEE SA balloters list for the Industry Applications Society Standards Committee (responsible for the IAS “color” books), the IAS Rural Electric Power Committee and the IEEE Rail Traction Standards Subcommittee. There were 203 people in the balloting body. Balloting was completed in May 2008 and the document was approved by IEEE SA RevCom at its June 2008 meeting. It is now available from the IEEE web site standards store. Conclusion - what does the new C37.2 mean to relay application engineers? The 2008 version of IEEE C37.2 includes: • A complete description of Device 16 and its suffixes – with example diagrams. • The addition of seventeen acronyms. • A complete cross reference table to IEC 61850 Logical Nodes • The addition of a new “List Box” method to describe the contents of a Device 11 - Multifunctional Device. • The addition of a Coordinated Trip Circuit Fusing diagram from a PSRC working group report. Why should you care about these changes in IEEE C37.2? To start, note that virtually every presentation at this relay conference will be describing or using a microprocessor based product. And essentially every one of those is a multifunction device (Device 11 in C37.2). In addition, many users are installing Ethernet networks and devices to link these new relays and need the new Device 16 to describe the substation network. The 2008 version of IEEE C37.2 – Standard Electrical Power Device Function Numbers, Acronyms and Contact Designations – saves these users from inventing new and varied schemes for representing the most critical and widely used components in new substation protection and control systems. It provides the documentation tools you will need for these new applications. If you use the Standard and discover gaps or have new ideas, share your observations with the PES Substations Working Group C5 – http://grouper.ieee.org/groups/sub/wgc5/index.htm John T. Tengdin, P.E (IEEE LF’ 2007) graduated from Purdue University, West Lafayette, Indiana in 1949 with a BSEE degree. His employment experience includes Dayton Power and Light Company, General Electric Company, Honeywell Information Systems, and the Tech Division of American Diversified Bank. He began work as an independent consultant in 1986, and formed OPUS Publishing as a two man partnership specializing in substation automation and cyber security in 1999, the predecessor to OPUS Consulting Group where he is a Senior Partner and Co-Founder. He has received numerous awards from the PES Substations Committee and the PES Power System Relaying Committee for his work on technical papers and standards, and from the IEEE SA for rapid standard
Page 1 and 2: The 2008 Revision of IEEE C37.2 Sta
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Page 9: Extensive IEC 61850 Cross Reference

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