Overview
IEC 62271-100:2008/AMD1:2012 is an important international amendment to the second edition of the IEC 62271-100 standard, published in September 2012. This amendment consolidates and incorporates the corrigendum released in December 2012. It focuses on high-voltage switchgear and controlgear, specifically addressing alternating current (AC) circuit-breakers.
This standard is developed under the auspices of the International Electrotechnical Commission (IEC) technical committee 17 subcommittee 17A, dedicated to high-voltage switchgear and controlgear. It defines technical requirements, terminology, testing methods, and performance criteria that ensure safety, reliability, and interoperability of high-voltage AC circuit-breakers used in electrical power systems.
Key Topics
IEC 62271-100:2008/AMD1:2012 amendment includes critical updates and clarifications that enhance the original document. Key topics covered in this amendment include:
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Terminology corrections: Refinement of electrical terms such as the replacement of “non-simu0ltaneity” with “non-simultaneity”, updated circuit-breaker classes (M1 and M2), and new definitions for pre-insertion and insertion times related to closing and opening resistors.
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Rated insulation levels: Introduction of new 1,100 kV and 1,200 kV rated voltage categories with associated insulation level tables to specify switching impulse, lightning impulse, and power frequency withstand voltages. This supports ultra-high-voltage circuit-breaker specifications.
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Rated peak withstand current: Adjustments for circuit-breakers with voltages above 800 kV, specifying a standard DC time constant of 120 ms and peak withstand current as 2.7 times the rated short-time withstand current for 50 Hz and 60 Hz.
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Transient recovery voltage (TRV): Updated representation and parameters of TRV for different fault types (terminal fault, short-line fault, and out-of-phase), with applicable test requirements and characteristics at various rated voltages. The amendment also refines the standard values for TRV for systems rated 245 kV and above.
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Test requirements and timings: Expanded descriptions concerning the representation of TRV waves, delay lines, and standard values for transient recovery voltages linked to rated short-circuit breaking current.
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Scope clarification: Explicit exclusion of self-tripping circuit-breakers with non-inactivatable tripping devices during testing, ensuring focus on circuit-breakers compliant with testability requirements.
Applications
IEC 62271-100:2008/AMD1:2012 and its original standard play a vital role in the design, manufacturing, testing, and application of high-voltage AC circuit-breakers used in:
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Electrical power transmission and distribution networks for voltages ranging from typical high-voltage up to ultra-high-voltage levels (up to 1,200 kV).
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Power plants and substations requiring reliable switchgear that meets international safety, mechanical endurance, and electrical performance standards.
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Gas insulated switchgear (GIS) systems where the amendment's clarifications about transient recovery voltage and system capacitance impacts help optimize design and testing protocols.
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System protection equipment, ensuring circuit-breakers can manage fault conditions and switching transients without compromising system stability or safety.
This standard guides manufacturers and engineers toward compliance with uniform quality, testing, and performance metrics, enabling safer electrical infrastructures and facilitating international trade and interoperability.
Related Standards
IEC 62271-100:2008/AMD1:2012 works in conjunction with several other IEC standards to provide a comprehensive framework for high-voltage switchgear:
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IEC 62271-1: General requirements for high-voltage switchgear and controlgear – forms the basis for technical parameters like short-circuit duration and insulation coordination.
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IEC 60071-1: Insulation coordination – provides methodology for determining rated insulation levels and related testing procedures referenced in this amendment.
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IEC 62271-102: Circuit-breakers for special applications – covers specifications relevant to particular cases beyond standard AC circuit-breakers.
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Electropedia: The IEC’s global online dictionary aids in understanding standard terminology used within IEC publications facilitating consistent communication.
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Other switchgear standards (IEC 62271 series): Including those on disconnectors, earthing switches, and gas-insulated metal-enclosed switchgear.
Conclusion
IEC 62271-100:2008/AMD1:2012 amendment enhances the foundational international standard for high-voltage AC circuit-breakers by updating definitions, test parameters, insulation levels, and transient recovery voltage specifications. These improvements are critical for manufacturers, testing laboratories, and power utilities aiming to achieve compliance with the latest global safety and performance requirements for high-voltage switchgear equipment.
By adhering to this amendment, stakeholders ensure reliable interruption performance, mechanical endurance, and optimal coordination within high-voltage power systems globally. Utilizing the IEC 62271-100 framework supports safer power network operations and drives innovation in switchgear technology.
Open preview (PDF)Amendment 1 - High-voltage switchgear and controlgear - Part 100: Alternating current circuit-breakers
