| 摘要 |
<p>The present invention concerns an electrical or electronic apparatus, in particular welding machine or battery charger, comprising processing and controlling electronic means (M1, M2) connected to a sensing electronic means (S1, S1', TR0, VT1, RT1, CT1, R8, CT2, Z1, Z2, Z3, Z4, Z5, Z6, Z7, R4, CT3, ST1, ST2, D12, Q1) from which it receives one or more detection signals of one or more electrical and/or physical quantities related to an apparatus operation, said processing and controlling electronic means (M1, M2) being capable to determine one or more conditions of apparatus operation on the basis of said one or more detection signals, the apparatus being capable to be power supplied through a plurality of terminals (F, N, GND) by a mains comprising a ground conductor to which a ground terminal (GND) of said plurality of terminals (F, N, GND) is connectable, the apparatus being characterised in that said sensing electronic means comprises or consists of a device (S1) for sensing a connection of the ground terminal (GND) to the ground conductor of the mains.</p> |
