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This standard specifies test methods and conditions to be used in the seismic qualification testing of protective relays and auxiliaries such as test and control switches, terminal blocks, and indicating lamps for use in nuclear facilities. Purpose The purpose of...
This standard applies to a.c. semiconductor motor controllers and starters, which may include a series mechanical switching device, intended to be connected to circuits, the rated voltage of which does not exceed 1 000 V a.c. This standard characterizes a.c. semiconductor motor controllers and...
This standard specifies design tests for electrostatic discharge (ESD) tests of protective relays and relay systems. The object of the type test described in this standard is to confirm that the equipment being tested will not misoperate or be...
This document provides a guide that covers the use of optical voltage and current sensor systems for protective relaying-including selection, installation, testing, and operations. Purpose This document is intended to provide guidance in the application and selection of optical...
This document applies to semiconductor controllers and semiconductor contactors for non-motor load intended to be connected to circuits, the rated voltage of which does not exceed 1 000 V AC. It covers their use: - for operations of changing the state of AC electric circuits between the ON-state...
This part of IEC 60947 applies to semiconductor motor controllers, starters and soft-starters which can include a series mechanical switching device, intended to be connected to circuits the rated voltage of which does not exceed 1 000 V AC. This document characterizes semiconductor motor...
This guide describes the application of protection systems on transmission-line fixed series capacitors and provides alternative approaches to the design, testing, and maintenance of protective systems based on the latest knowledge and the application experience of the industry. This...
This part of IEC 61557 specifies the requirements applicable to measuring equipment for testing the phase sequence in three-phase distribution systems. Indication of the phase sequence can be mechanical, visual and/or audible. This document does not apply to additional measurements for other...
The purpose of these specifications is to assure tested electrical equipment and systems are operational, are within applicable standards and manufacturer's tolerances, and are suitable for continued service. These specifications incorporate comprehensive field tests and inspections...
Preface More than 170 Years of Innovation Sir Charles Wheatstone invented the first electromechanical relay in 1834 to amplify electrical signals, making information transmission over long distances possible for the first time. Relay functionality diversified over time, and at the...
This part of IEC 61557 specifies the requirements applicable to measuring equipment for testing the phase sequence in three-phase distribution systems. Indication of the phase sequence can be mechanical, visual and/or audible. This document does not apply to additional measurements for other...
Audio/video, information and communication technology equipment - Part 1: Safety requirements UL 62368-1 This part of IEC 62368 is applicable to the safety of electrical and electronic equipment within the field of audio, video, information and communication technology, and business and office...
This European Standard describes the method to evaluate the performance of protective sys-tems for electrical cable and busbar systems in order to maintain the circuit integrity under fire conditions to classify the protective system according to EN 13501-3 for the P classification....
This standard covers the design, testing, and installation of metal-enclosed switchgear that incorporates gas (typically SF6) at higher than ambient pressure as an insulation medium for alternating-current applications rated above 1 kV to 52 kV. The contents of the switchgear may include but...
This part of IEC 60947 is applicable to the following equipment: - electromechanical contactors and starters including motor protective switching device (MPSD); - actuators of contactor relays; - contacts dedicated exclusively to the coil circuit of this contactor or this contactor...
The scope of this guide is to describe field test methods that assure current transformers (CTs) are connected properly, are of marked ratio and polarity, and are in a condition to perform as designed both initially and after being in service for a period of time. Annex A describes wiring...
This standard covers the design, testing, and installation of metal-enclosed switchgear that incorporates gas (typically SF6) at higher than ambient pressure as an insulation medium for alternating-current applications rated above 1 kV to 52 kV. Contents of switchgear may include but are not...
1.1 The techniques described in this guide pertain to mixed flowing gas (MFG) tests containing species that are applied to evaluate devices containing electrical contacts such as slip rings, separable connectors, electromechanical relays or switch contacts. These techniques may be...
