Snap-on CAT3 - page 567

567
INSULATED TOOLS
Dielectric test
The tools shall be immersed in water for 24 hours. A voltage of 10 kV shall then be continuously applied for 3 min. The
test shall be considered successful if no electrical puncture, spark over or flashover occurs during the test period, and
if the limits of leakage current are not exceeded.
Impact test
The tool is cooled at -25° C for two hours. Afterwards, a special hammer applies force on the insulating layer. The test
shall be considered successful if the insulating material shows no breaks.
Insulation adhesion test
The tools shall be conditioned at a temperature of 70° C for 168 h. A force of 50 N shall be applied in the direction
of the line dividing the insulating material coating from the conductive part for 3 min. The insulation material must
during this test stay firmly attached to the basic tool.
Flame test
The test shall be considered as passed if the flame height on the tool does not exceed 120 mm and there is no leakage
of insulated material in fusion.
Retaining force test
This test is applied only to tools capable of being assembled. Consists on applying a force of 50 N to try to separate
both tools. After a minute, both tools had to stay assembled.
Permanent marking durability
The markings shall be rubbed for 15 s with a rag soaked in water, and then for 15 s with a rag soaked in isopropanol.
After this rubbing, the marking shall still be legible
Penetration test
The insulating surface is pressed with a special device. A voltage of 5000 V is then applied to the tool for 3 minutes.
The test shall be considered successful if no electrical puncture, spark-over or flashover occurs during the test period.
Visual and dimensional
The tool (in particular the insulation) shall be visually checked and shall be free from external defects. The marking
has to be perfectly legible and the dimensions should be inaccordance with the standard.
* 63% of Bahco insulated tools are Certified by the German VDE laboratory
Routine tests in accordance with IEC60900 specification
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