Direction for the implementation of the requirements of IEC/IEEE 60780-323 as they apply to the specific features of safety-related actuator qualification are provided. This standard establishes criteria for qualification of…
The inverse-time characteristics of overcurrent relays are defined in this standard. Operating equations and allowances are provided in the standard. The standard defines an integral equation for microprocessor relays that…
Principles of power bus protection are discussed. The availability and location of breakers, current sensing devices, and disconnect switches are addressed, as well as bus configurations and switching schemes and…
The significance of oil-spillage regulations and their applicability to electric substations are discussed; the sources of oil spills are identified; typical designs and methods for dealing with oil containment and…
These tests shall be used to demonstrate that the motor-starter fuses being tested conform with the specified ratings and characteristics. The standard is designed to cover a product that can…
This part of IEC 62271 is applicable to three-phase AC high-voltage generator circuit-breakers, hereafter called generator circuit-breakers, designed for indoor or outdoor installation and for operation at frequencies of 50…
Electrical and mechanical requirements for liquid-immersed distribution and power transformers, and autotransformers and regulating transformers; single-phase and polyphase, with voltages of 601 V or higher in the highest voltage winding,…
The electrical, mechanical, and physical requirements of oil-immersed and dry-type air-core smoothing reactors and dry-type air-core converter reactors for high-voltage direct current (HVDC) applications are specified. Test code is defined…
Information for understanding the construction, operation, and application of high-voltage (> 1000 V) fuses and accessories, intended for use on alternating current (ac) electrical distribution systems is provided. Current-limiting, expulsion,…
