Spark free disconnection of electric appliances from the power grid - by mechanically isolating the magnetic circuit of a transformer between primary and secondary windings

摘要

A device for spark-free disconnection of electric appliances from the supply grid, where the power supply part feeds the primary winding of a transformer whose secondary winding supplies the energy-consuming part with power is claimed. The magnetic circuit of the transformer is mechanically isolated between primary winding and secondary winding. Used in environment exposed to risk of explosion, to comply with safety regulations. Safe disconnection from the power grid can be obtd.