BS ISO 19453-5-2018 pdf free download.Road vehicles — Environmental conditions and testing for electrical and electronic equipment for drive system of electric propulsion vehicles Part 5: Chemical loads
This document specifies requirements for the electric propulsion systems and components with maximum working voltages according to voltage class B. It does not apply to high voltage battery packs (e.g. for traction) and systems and components inside. It describes the potential environmental stresses and specifies tests and requirements recommended for different stress levels on/in the vehicle. This document describes chemical loads.
NOTE Conditions and testing for a continuous contact can be determined from other standards or agreed upon between the customer and the supplier.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 19453‑1, Road vehicles — Environmental conditions and testing for electrical and electronic equipment for drive system of electric propulsion vehicles — Part 1: General
ISO 19453‑4, Road vehicles — Environmental conditions and testing for electrical and electronic equipment for drive system of electric propulsion vehicles — Part 4: Climatic loads
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 19453‑1 apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at https://www.iso.org/obp
4 Tests
4.1 General
Components and associated parts that can come into contact with the specified chemical agents shall be resistant to those agents. The components and associated parts shall be tested with all agents they are likely to come into contact with, except for those materials which can be shown by documentary evidence to be immune to the contaminant and which need not be tested.
A material is considered to be immune to a contaminant if there is no change in properties sufficient to affect material performances over the time and at the temperature specified in this clause.
The supplier and vehicle manufacturer shall agree on the manufacturer and type of chemical agents.
Resistance to the specified chemical agents shall be considered as early as possible during the material selection process.
4.2 Purpose
The purpose of the test is to determine whether the device under test (DUT) is unacceptably affected by temporary exposure to contaminating agents.
NOTE This test is not intended to be a life test.
4.3 General test conditions
Chemical agents shall be selected as defined in Table 1, depending on the mounting location of the DUT.
Unless otherwise specified, one DUT per test agent shall be used.
The following tests describe one test cycle. Unless otherwise specified, one test cycle with one agent per DUT shall be performed. Any other number of cycles may be agreed between the customer and the supplier.
NOTE If the size of the DUT is sufficient, multiple test agents can be applied partially on one DUT provided that these do not have any influence on each other.
4.4 DUT conditioning
Unless otherwise specified, the DUT shall be stored at a room temperature (RT) of (23 ± 5) °C and a relative humidity (RH) of between 25 % and 75 % until temperature and humidity are stabilized.
The DUT shall be tested under conditions of normal use. If necessary, and unless otherwise specified,unrepresentative coatings or contaminations of the DUT shall be removed.
If a cleaning procedure is needed, the customer and the supplier shall agree on the methodology.
4.5 Test agent conditioning
Unless otherwise specified, all test agents shall be stabilized at an RT of (23 ± 5) °C when applied on the DUT.
4.6 Application method
Unless otherwise specified, application shall be performed at an RT of (23 ± 5) °C and an RH of between 25 % and 75 %.
The application method shall be such that the DUT is sufficiently wetted by the test agent in the areas to be tested. The application method shall be chosen as defined in Table 2, depending on the agent and the mounting location of the DUT.
The preferred application methods are given in Table 1.
4.7 Test conditions
Unless otherwise specified, the exposure of the DUT to the agent applied shall be performed at the temperature and for the duration specified in Table 1.BS ISO 19453-5 pdf download.