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Large volume decimal capacitance box

A capacitor box, high-capacity technology, applied in multiple capacitors, measuring electrical variables, multiple fixed capacitors, etc., can solve the problems of short switching life, large fire, arcing and other problems

Inactive Publication Date: 2009-02-11
骆乃光
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Since this kind of capacitor box is directly connected to the mains, an arc will be generated when the switch is turned, and the inrush impact is also very serious, especially when the contact capacity is greater than 6μF, the fire is very strong, and the switch contact seat is made of polyester material. Coking is often found so that the switch life is very short and the board keys sometimes bite due to arcing

Method used

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  • Large volume decimal capacitance box

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Embodiment Construction

[0012] In the accompanying drawing, the 0 to 10 indications of the double-pole eleven-throw switch 3 are composed of five capacitors of 0.1 μF, 0.2 μF, 0.3 μF, 0.4 μF, and 0.6 μF, and one end of the 0.6 μF capacitor is connected to 6, 7, 8, 9, 10 one layer of contacts, when the switch throws "10", 0.4μF is connected to another layer of contacts to form 0.6μF and 0.4μF in parallel, at this time the indicated value is 10×0.1μF, when the switch throws "9" 0.3μF and 0.6μF are connected in parallel, and so on, the switch throwing "1", "2", "3", "4", "6" is caused by the indication value of the capacitor itself, when the switch throws "5", it is caused by 0.1μF and 0.4 μ Parallel value.

[0013] The double-pole eleven-throw switch 4 is a combination of 1, 2, 3, 3, and 7. When the switch throws "1", "2", "3", and "7", it is determined by the value of the capacitor itself, and when it is "4", it is 3μF The capacitor is connected in parallel with the 1μF capacitor, 3μF is connected in...

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Abstract

A large volume decimal capacitance box used in physical laboratories of universities is composed of two-step disks of 10x0.1muF and 10x1muF and two cut out and cut-in switches of 10muF or 10muF, 20muF. This invention strings ferrite magnetic beads on the lead connecting the capacitor and the switch to suppress the generation of inrush current and arc so as to increase the lifetime of switches.

Description

technical field [0001] The invention relates to an instrument for outputting adjustable capacitance value. Background technique [0002] In the current physics experiments in colleges and universities, the minimum step value of the high-voltage-resistant decade capacitor box is generally 0.1μF, and two step discs (0~10)×1μF and (0~10)×0.1μF are used, plus a switch Then connect 10μF or add two switches, one is connected to 10μF, and the other is connected to 20μF capacitor. [0003] Since this kind of capacitor box is directly connected to the mains, an arc will be generated when the switch is turned, and the inrush impact is also very serious, especially when the contact capacity is greater than 6μF, the fire is very strong, and the switch contact seat is made of polyester material. Coking is often found so that the switch life is very short and the board keys sometimes bite due to arcing. Contents of the invention [0004] The purpose of the present invention is to make...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G5/38H01G4/38G01R27/26
Inventor 骆乃光
Owner 骆乃光
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