| 摘要 |
<p>The invention concerns an electronic temperature controller, particularly for refrigeration appliances, with mains connections (3, 4) and an electronic circuit (1) having a power supply (7), a control unit and measuring and setting elements (9, 10, 11). The mains connections (3, 4) are connected with the power suppy (7) via protective impedances (5, 6) consisting of at least two single impedances connected in series, and the electronic circuit is dimensioned for an operating current of maximum 0.35 mA (peak value) when connected to an AC mains and maximum 1 mA when connected to a DC mains. These values are doubled, when the electronic circuit has an earthing connection. This gives safety for the operator through shock-proof protection, which can be achieved at low cost and with small dimensions.</p> |
