This guide describes methods to protect a power system from faults that are not cleared because of failure of a power circuit breaker to operate or interrupt when called upon by a protective relay. The intent is to give the reader a guide in how to detect that a breaker has failed to clear a fault, and how to electrically isolate the fault after the breaker has failed to clear the fault. Additionally, schemes that provide primary protection of the power system from performance failures of the… read more power circuit breaker other than fault clearing failures such as failure to operate, either tripping or closing, manual or automatic, are also described. Such schemes, when applied, are typically integrated as a part of the overall BFP scheme. Also covered are recent practices that take advantage of new technologies. read less
This guide provides maintenance testing and failure analysis guidance for form-wound, squirrel cage, induction machinery rated up to 15 kV. The guide addresses the following machine systems: — Stator (winding and wore) — Rotor (winding and core) — Vibration and noise — Bearings and shafts — Structure, frame — Ventilation — Accessories
This guide describes methods to protect a power system and its components from consequences resulting from a circuit breaker failure to operate (open or close) when called upon by protection or control systems. The guide explains how to detect a breaker that has failed to operate and the actions to address the failure.
A Failure Reporting Form, figures 1 and 2, has been developed by the IEEE Switchgear Committee to improve the reliability of circuit breakers through uniform reporting of field failures. The use of this approach is the recommended practice for all users of power circuit breakers.