IEEE Begins Work on First Circuit Probe Test Standard

July 8, 2006

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The Institute of Electrical and Electronics Engineers Inc. (IEEE) is developing the first standard defining a uniform method for characterizing electrical circuit probe performance. IEEE also approved revised versions of five power generation standards, including a generating station design guide, two standards for nuclear power stations and a standard for wire and cable flame testing.

IEEE P1696 - Standard for Terminology and Test Methods for Circuit Probes will address electrical circuit probes and probes systems, including waveform acquisition hardware and software and signal/waveform analysis software. This document will apply to probes having either signal and ground conductors or two-signal conductors. It will replace the proprietary methods that now exist at different vendors, so users can compare performance and understand probe circuit-loading effects.

The IEEE also approved revisions to five existing power generation standards:

• IEEE 666 - Design Guide for Electric Power Service Systems for Generating Stations was updated to add new information and references, correct errors and address comments received from users. Service systems covered by the guide include motors, resistance heaters and rectifiers.
• IEEE 650 - Standard for Qualification of Class 1E Static Battery Chargers and Inverters for Nuclear Power Generating Stations provides updated information on how to demonstrate that an installed battery charger or inverter meets its design specification.
• IEEE 765 - Standard for Preferred Power Supply (PPS) for Nuclear Power Generating Stations (NPGS) adds guidelines for verifying the voltage adequacy of preferred power supplies. The revision includes methods to help ensure that the design basis of a preferred power system is valid for all reasonably expected system conditions.
• IEEE 1070 - Guide for the Design and Testing of Transmission Modular Restoration Structure Components updates the references and drawings in this generic specification that electric utilities use when acquiring transmission modular restoration structure components.
• IEEE 1202 - Standard for Flame-Propagation Testing of Wire & Cable was modified to keep the standard current, extend it beyond wire and cable in industrial and commercial occupancies and establish a test protocol and performance criteria for the flame propagation tendency of cables in vertical cable trays.

The IEEE also reaffirmed the continued use of four standards:

• IEEE 835 -IEEE Standard Power Cable Ampacity Tables.
• IEEE C37.082 - IEEE Standard Methods for the Measurement of Sound Pressure Levels of AC Power Circuit Breakers.
• IEEE C57.120 - IEEE Loss Evaluation Guide for Power Transformers and Reactors.
• IEEE 1240 - IEEE Guide for the Evaluation of the Reliability of HVDC Converter Stations.

Source: Institute of Electrical and Electronics Engineers Inc. (IEEE).