HEALTH INVESTIGATION IN A CIRCUIT BREAKER

A health investigating arrangement (22) for a first unidirectional conducting element (MBD1) having a reverse blocking state, a forward conduction state and a faulty state comprises a voltage dividingcircuit (26) in parallel with the element (MBD1), the circuit (26) comprises a first block (40) comprising a first component (R1) connected in series with a second block (42) comprising a second component (R2), the components having a relationship between each other dividing the reverse blocking state voltage down to a level that can be handled by a signal evaluating circuit. A junction between the blocks (40, 42) forms a health signal output providing a health signal (Vmon) capable of representing all states and the block (42) comprises a second unidirectional conducting element (D2) with opposite orientation compared with the first (MBDi) for removing the voltage division from the health signal when the first element is in the forward conduction state. 一种用于具有反向阻断状态、正向导电状态和故障状态的第一单向导电元件(MBD1)的健康调查装置(22)包括：与元件(MB