Totally-closed anti-arc-pulling protecting switch
A protection switch, fully enclosed technology, applied in electrical switches, electrical components, circuits, etc., can solve the problems of electrical insulation material burnout, metal overheating melting or evaporation, inconvenient for manual direct operation, etc., to prevent arcing.
Active Publication Date: 2014-07-02
ELECTRIC POWER RES INST OF GUANGDONG POWER GRID +1
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Problems solved by technology
When a general switch is arc-discharged, the surface temperature of the arc is three to four thousand degrees Celsius, and the center temperature can reach tens of thousands of degrees Celsius. Burnt electrical insulation near the arc
The general arc extinguishing method requires certain conditions, or it is not convenient for manual direct operation, or the cost is high
Method used
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[0015] like figure 1 and figure 2 As shown, the fully enclosed anti-arc protection switch embodiment of the present invention includes two terminals connected to the load and the power supply wire, and also includes a gradual resistance circular tube whose resistance gradually changes from zero to greater than 30M ohms 1 and a movable contact 2 that can slide in the gradient resistance tube and make electrical contact with it, the zero resistance end 3 of the gradient resistance tube is connected to the end of the fully enclosed arc protection switch connected to the load, and the movable contact passes through the pull rod 4 Connect the other end 5 connected with the power supply wire; the zero resistance end of the gradient resistance tube is closed with a conductive semi-spherical shell with a small vent hole, and the large resistance end is closed with an insulating semi-spherical shell with a small vent hole and a tie rod hole; the pull rod 4. One end is connected to th...
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A totally-closed anti-arc-pulling protecting switch is used for hot-line work on large and medium inductive loads or capacitive loads and comprises a resistor tube (1) gradually changing from zero, and a movable contact (2) which can slide in the resistor tube gradually changing and make electrical contact with the resistor tube gradually changing, the zero resistance end (3) of the resistor tube gradually changing is connected with one end of the totally-closed anti-arc-pulling protecting switch, and the movable contact is connected with the other end (5) of the totally-closed anti-arc-pulling protecting switch through a pull rod (4); one end of the pull rod is connected with the movable contact, the other end of the pull rod is hinged to a slider (6), a swing handle rod (7) is sleeved with the slider in a sliding mode, and one end of the swing handle rod is hinged to a shell (8) of the totally-closed anti-arc-pulling protecting switch. The switch is reliable in performance, and injuries to the human body caused by electric arcs generated in the electrified switching on or off process can be prevented; local hot melting of disconnecting link sheet copper caused by overheat of the electric arcs is prevented, and the service life of the switch is prolonged; the switch has the advantages of being high in cost performance, wide in application range, good in market competitive advantage and the like.
Description
technical field [0001] The invention relates to an electric switch, in particular to a fully enclosed arc protection switch for large and medium inductive loads or capacitive loads. Background technique [0002] With the expansion of industrial and agricultural production, various types of high-power equipment are used in production, some inductive loads (such as motor units, compressors, pumps, transformers, etc.), capacitive loads (such as compensation capacitors), their power It can range from thousands of watts to tens of kilowatts or even higher. Due to its own voltage and current characteristics, the short-term current when it is started and disconnected can reach several times the current during normal operation. Knife switches often have obvious arc discharge. When a general switch is arc-discharged, the surface temperature of the arc is three to four thousand degrees Celsius, and the center temperature can reach tens of thousands of degrees Celsius. Burnt electri...
Claims
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IPC IPC(8): H01H9/42
Inventor 张思建党三磊张捷李健刘健肖林松李航
Owner ELECTRIC POWER RES INST OF GUANGDONG POWER GRID