BS ISO 7637-1:2015 pdf free.Road vehicles – Electrical disturbances from conduction and coupling Part 1: Definitions and general considerations.
This part of ISO 7637 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.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
IEC 60050—151, International Electrotechnical Vocabulary — Part 151: Electrical and magnetic devices
3 Terms and deilnitions
For the purposes of this document, the terms and definitions given in IEC 60050—151 and the following apply.
3.1 artificial network AN network inserted in the supply lead or signal/load lead of apparatus to be tested which provides, in a given frequency range, a specified load impedance for the measurement of disturbance voltages and which can isolate the apparatus from the supply or signal sources/loads in that frequency range
Note ito entry: Network inserted in the d.c. power lines of the DUT which provides, in a given frequency range, a specified load impedance and which isolates the DUT from the d.c. power supply in that frequency range.
3.2 burst transient comprised of a complex series of transient voltage variations
Note 1 to entry: For bursts, in addition to the parameters given in the definitions; 3ZJ.. 122 and 122 are also relevant. For an illustration of a burst transient waveform, see ISO 7637—2.
4 General aim and practical use of Iso 7637
Iso 7637 is concerned with the problem of electrical transient disturbances in road vehicles and also in trailers. It deals with the emission of transients, transient transmission through electrical wiring and the potential susceptibility of electronic components to electrical transients.
The test methods and procedures, and test instrumentation and limits, given in the various parts of 150 7637 are intended to facilitate component specification for electrical disturbance by conduction and coupling. A basis is thus provided for mutual agreement between vehicle manufacturers and component suppliers, intended to assist rather than restrict.
Immunity measurements of complete vehicles are generally able to be carried out only by the vehicle manufacturer, owing to, for example, the desire to preserve the secrecy of prototypes or a large number of different vehicle models. Therefore, for research, development, and quality control, a laboratory measuring method is used by the vehicle manufacturer and equipment suppliers to test electronic components.
These tests, specified in the different parts of ISO 7637, are called “bench tests”. The bench test methods, some of which require the use of an artificial network, will provide comparable results between laboratories. They also give a basis for the development of devices and systems and may be used during the production phase.
Protection from potential disturbances has to be considered as a part of total vehicle validation, It is important to know the correlation between laboratory tests and vehicle.
A bench test method for the evaluation of the immunity of a device against supply or data-line transients may be performed by means of a test pulse generator; this may not cover all types of transients that can occur in a vehicle. Therefore, the test pulses described in the different parts of ISO 7637 are characteristic of typical pulses.BS ISO 7637-1 pdf free download.