Motor Control - Contactor failure

[Baljit]

Hello All,

Came across an interesting query on the contactors below. Do we have any database where below requested info is recorded? 

• Failure mode of the equipment, % of dangerous failure?
• How the failure mode was developed (extreme environmental, electrical, EMC or other conditions)?
• Do they do endurance tests until the product destroys itself, how do they fail typically?
• Do they over test anything? E.g test on a 100ka circuit but only claim 65kA or test a particular frame size of contactor for the maximum rating and everything in that frame size is then covered, this would mean that most of the current ratings would be well over dimensioned.

Any information will be appreciated.

Thanks,

Baljit