IEC TS 61430:1997 pdf download – secondary cells and bauteries – Testm ethods for checking the perfo rm anceofdevices designed for reducing explosion hazards – Lead-acid starter batteries

IEC TS 61430:1997 pdf download – secondary cells and bauteries – Testm ethods for checking the perfo rm anceofdevices designed for reducing explosion hazards – Lead-acid starter batteries.
This technical report gives guidance on procedures for testing the effectiveness of devices which are used to reduce the hazards of an explosion, together with the protective measures to be taken.
1,2 Nonn atiie xtnce,.
The following normative document contains provisions which, through reference in this text, constitute provisions of this technical report, At the time of publication, the edition indicated was valid, All normative documents are subject to revision, and parties to agreements based on this technical report are encouraged to investigate the possibility of applying the most recent edition of the normative document indicated below. Members of IEC and ISO maintain registers of currently valid International Standards.
IEC 60095-1:1988, Lead acid starter batteries — Part 1: Genera! requirements and methods of test
2 Protecte measures
2,1. General
When working with or in close proximity to a battery, the precautions in 2.2 to 2.5 should be observed.
22 Shortc1zxus
Insulated tools are necessary when working on batteries to avoid any accidental short circuits. All metallic personal adornments should be removed from hands, wrists and neck before commencing work.
2,3 Static change
Care should be taken to avoid static charges which could result in an ignition of the gases.
2.4 Ectrica1connecticn and disconnectn
2.4,1 Connections to batteries should not be made or broken when a current flow is possible/occurring.
2.42 When disconnecting a battery from the electric circuit of a vehicle, the terminal connected to the frame (earth) should be disconnected first and reconnected last.
2.5 Chazgingaa
Charging should be performed in a well ventilated area.
NOTE — Some battery installations are poorly ventilated. Special care is necessary to disperse the explosive gases
before commencing work.
3 Saty ptcautbns when testing devres rreducing expbsn hazards
WARNING — Testing of a venting system can result in an explosion. It is necessary that extreme caution be exercised to avoid personal injury. The safety precautions must be strictly followed.
3.1 The gas source, spark electrodes and test fixture shall be fully contained in an externally vented explosion test chamber, which can be viewed indirectly by adequate means.
32 The battery charging source shall be located outside the explosion test chamber and convenient to the testing personnel. The charging circuit shall be electrically isolated from the spark generating circuit and shall have two emergency disconnect switches located
a) where they are readily accessible to the testing personnel, and
b) at a remote position at least 3 m from the explosion test chamber.
These emergency switches shall not be used under normal circumstances, but in cases of emergency only, since their use may damage some types of chargers.
3.3 A suitable test area should be designated, 3 m2 or more. Signs shall be posted prohibiting unauthorised persons from entering the area whilst any electrical circuit in the explosion test chamber is or could be energized.
3.4 During testing, the test area in which the explosion test chamber is located shall be clearly marked to prohibit the entry to all persons not fully familiar with all the safety precautions and not wearing full protection from the hazard to be encountered (see 3-6).
3J It is essential that smoking, naked flames or other spark sources not associated with the tests are not permitted in the area during testing. Any light fitting shall be of the explosion- proof type.
Full face protection devices shall be worn within the restricted area. Additionally, suitable ear protectors should be worn against the considerable noise that can be generated by an exploding battery.
3.7 The spark generating circuit, as well as being electrically isolated from the battery charging circuit, shall have an emergency disconnect switch readily accessible to the testing personnel.
3.8 The exhaust fan of the explosion test chamber shall be operating during the entire test, unless the procedure requires it to be switched off (see annex B).