Patent ID: 6259610
Filing Date: 2001-07-10
Classification: H03K

Abstract:
A circuit arrangement for connecting an electrical consumer to an alternating voltage source, said circuit arrangement comprisinga switch actuator (16) connectable in series with the electrical consumer (12);an electronic circuit (22) for triggering the switch actuator, said electronic circuit being connected electrically with said switch actuator (16) and supplied with a direct voltage by means of said switch actuator (16), wherein said switch actuator includes a rectifier (38) for supplying said direct voltage to said electronic circuit (22), a transformer (24), said transformer comprising a secondary winding (32) supplying power to said rectifier (38) and two switchable primary windings (26,28), and switching means (42, 36) controlled by said electronic circuit (22) for switching between said primary windings (26,28) to connect one or the other of said primary windings (26,28) with said alternating voltage source, said two switchable primary windings (26,28) comprising a first primary winding (26) having a low inductance and a second primary winding (28) having a high inductance; andanother switching means (44) for short-circuiting said first primary winding (26) for a short-circuit duration according to a nominal power consumed by said electrical consumer (12), said another switching means (44) being connected across or in parallel with said first primary winding (26).