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ISO 7637 Conduction and Coupling Electrical Disturbances

Electrical Disturbance standards cover test methods for road vehicles subjected to exposure from a range of possible sources of electrical disturbances. While this is important in any vehicle, the increasing amounts of electrical components present in modern non-electric vehicles and the roll-out of electric vehicles makes the consideration of electromagnetic immunity all the more important. ISO standards from three series, ISO 11452, ISO 11451, and ISO 7637, contribute heavily to this field of standardization. ISO 7637 is specifically related to conduction and coupling.

ISO 7637 - Road Vehicles Electrical Disturbances Package

ISO 7637-1, ISO 7637-2, ISO 7637-3, and ISO/TR 7637-5

The ISO - Road Vehicles Electrical Disturbances Package addresses electrical disturbances from conduction and coupling in motor vehicle equipment. It specifies bench tests to determine the injection and the measurement of electrical transients along supply lines and for calculating the immunity of devices under test by coupling. The coupling test methods included are the capacitive coupling clamp, direct capacitive coupling and the inductive coupling clamp. This package is also supported with the definitions and general considerations standard for ISO 7637 Road Vehicles. It includes: ISO 7637-1:2023 ISO 7637-2:2011 ISO 7637-3:2016 ISO/TR 7637-5:2016 This package has been discounted 25% off the individual list price.

ISO 7637-1:2015

Road vehicles - Electrical disturbances from conduction and coupling - Part 1: Definitions and general considerations

ISO 7637-1:2015 defines the basic terms relating to electrical disturbances from conduction and coupling used in the other parts of ISO 7637. It also gives general information on the whole ISO 7637 series.

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ISO 7637-2:2011

Road vehicles - Electrical disturbances from conduction and coupling - Part 2: Electrical transient conduction along supply lines only

ISO 7637-2:2011 specifies test methods and procedures to ensure the compatibility to conducted electrical transients of equipment installed on passenger cars and commercial vehicles fitted with 12 V or 24 V electrical systems. It describes bench tests for both the injection and measurement of transients. It is applicable to all types of road vehicles independent of the propulsion system (e.g. spark ignition or diesel engine, electric motor). Function performance status classification for immunity to transients is also provided.

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ISO 7637-3:2016

Road vehicles - Electrical disturbances from conduction and coupling - Part 3: Electrical transient transmission by capacitive and inductive coupling via lines other than supply lines

ISO 7637-3:2016 defines bench test methods to evaluate the immunity of devices under test (DUTs) to transient pulses coupled to lines other than supply lines. The test pulses simulate both fast and slow transient disturbances caused by the switching of inductive loads and relay contact bounce. The following three test methods are described in ISO 7637-3:2016: - capacitive coupling clamp (CCC) method; - direct capacitive coupling (DCC) method; - inductive coupling clamp (ICC) method. ISO 7637-3:2016 applies to road vehicles fitted with nominal 12 V or 24 V electrical systems. For transient pulses immunity, Annex B provides recommended test severity levels in line with the functional performance status classification (FPSC) principle described in ISO 7637 1.

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