Resistance box

Abstract

The invention discloses a resistance box, which comprises a box body, a plurality of resistance turntables, an output high end and an output low end. Each resistance turntable comprises a resistance disc, a character disc and a rotary switch. The resistance turntable and the character disc are arranged in the box body. The rotary switch comprises a first rotating shaft used for placing a dial, a second rotating shaft used for placing a resistor disc, and a coupling connecting the first rotating shaft and the second rotating shaft. The box body comprises a display panel, and the display panel is provided with an indication window used for displaying numerical values on the character disc. The resistor disc comprises a plurality of resistors connected in series, a plurality of connecting contact pieces arranged at the two ends of each resistor respectively, two contact switches and two wiring terminals connected with the output ends connected in series, first contacts of the two contactswitches are fixedly connected with a second rotating shaft, and second contacts of the two contact switches are movably connected with the connecting contact pieces. The two wiring terminals of the plurality of resistance discs are connected in series, and the output ends of the series connection are respectively connected with the output high end and the output low end. According to the invention, data reading can be carried out conveniently, and carrying is convenient.

Description

technical field [0001] Embodiments of the present invention relate to the technical field related to resistance boxes, in particular to a resistance box. Background technique [0002] The high-voltage high-resistance box is a standard resistance appliance commonly used in the verification and calibration of insulation resistance meters. The high-voltage and high-resistance boxes produced at home and abroad generally adopt a decimal turntable structure, and the high-voltage and high-resistance boxes with a resistance range of TΩ are generally composed of about ten resistance turntables. The existing high-voltage and high-resistance boxes have the disadvantages of large volume, heavy weight, and inconvenient transportation and on-site calibration. [0003] The reading of the output resistance value of the existing high-voltage high-resistance box requires 3 steps. First, read the value indicated by the knob of each resistance disc in turn (the value is printed on the front p...

AI Technical Summary

Problems solved by technology

The existing high-voltage and high-resistance boxes cannot directly indicate the output resistance value, and the entire reading process is too cumbersome, which affects the calibration work efficiency

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