AUTOMATIC CIRCUIT BREAKER Russian patent published in 1999 - IPC

FIELD: low-voltage electrical engineering. SUBSTANCE: device has insulation housing with window for connection of wire to input terminal, mechanism for normal decoupling, overcurrent release device for integral heating current, which comprises heating member and by-pass, which are mounted on temperature-sensitive bimetallic plate and are positioned on current-conducting rack with oven. The oven comprises temperature-sensitive bimetallic plate which is mounted on flange and conjugated to lath which is made from insulation material. They are located on mobile carriage for interaction of loose end of temperature- sensitive bimetallic plate to mobile lever which is engaged with lath of normal decoupling mechanism. Loose end of temperature-sensitive bimetallic plate is covered from above by metallic counterweight spaced with respect to passive layer. In addition device has Z-shaped rigid current conductor and L-shaped pole which serves as shield from gas flows and contacts terminal of current-conducting rack. One end of Z-shaped rigid current conductor is attached to current-conducting rack in point of connection of temperature-sensitive bimetallic plate and by-pass of overcurrent release device for integral heating current. Its second end is connected to L-shaped pole. Current-conducting rack is made from material with low current conductance. Z-shaped rigid current conductor and L-shaped pole are made from material with high electric conductance. EFFECT: decreased cost of non-ferrous metals, increased heat exchange, increased protection against shock impact and vibration. 3 dwg