Abstract: The detection of an insulation fault on a network furnished with tappings by a first monitor can be followed by the location and identification of the fault by way of a locator to be placed on the tappings. To satisfy the level-two security, or SIL-2, in which the risk of occurrence of a hazard is decreased by a factor of greater than 100, second means for detecting the insulation fault are installed, to obtain a redundant item of information as regards the insulation resistance of the network, independently of the monitor but associated with a locator.

Abstract: The detection of an insulation fault on a network furnished with tappings by a first monitor can be followed by the location and identification of the fault by way of a locator to be placed on the tappings. To satisfy the level-two security, or SIL-2, in which the risk of occurrence of a hazard is decreased by a factor of greater than 100, second means for detecting the insulation fault are installed, to obtain a redundant item of information as regards the insulation resistance of the network, independently of the monitor but associated with a locator.

Abstract: A protective case with an electronic device, including an assembly which includes a support cradle fixed to and supporting the electronic device, a sealed metal housing enclosing the assembly, the support cradle being fixed to the sealed metal housing via mechanical dampers to isolate the assembly from external disturbances including shocks, wherein a gap is formed between the assembly and the sealed metal housing, and a fan fixed to the cradle for generation of air flow in the gap to promote convection heat transfer from the electronic device to the sealed metal housing.