| 摘要 |
<p>The invention relates to an electrical metering device (1) comprising a housing (2) with a back face (20), a front face (21) and lateral faces forming a closed box, and heat generating parts (5) internal to said housing (2) in close proximity to said back face, said electrical metering device (1) being adapted to be fixed to a vertical mounting backboard (4).
According to the invention, said electrical metering device (1) comprises a rear back cavity (6) extending behind said back face (20), and facing at least said heat generating parts (5), so as to create an air gap between said back face (20) and said vertical mounting backboard (4) when said electrical device is fixed to the vertical mounting backboard. Advantages: improve thermal efficiency of metering devices with respect to external surfaces heating requirements.</p> |
