Adjustable-length cable special for field inspection of comprehensive automatic system of substation

Abstract

The invention discloses an adjustable-length cable special for field inspection of a comprehensive automatic system of a substation. The cable comprises a middle shell, wherein a left shell and a right shell are arranged on the left side and the right side of the middle shell respectively; the side wall of the right shell is provided with a right cable outlet; the side wall of the left shell is provided with a left cable outlet; a shaft seat is arranged in the middle shell; a right cable wheel shaft is arranged on the shaft seat; a right cable wheel shaft inner cavity is formed in the right cable wheel shaft; a right cable wheel and a driven gear are fixedly arranged on the right cable wheel shaft; a cable is arranged on the right cable wheel; the right end of the cable extends out of the right shell through a right cable outlet; the left end of the cable extends into the right cable wheel shaft inner cavity from the side wall of the right cable wheel shaft and extends out of the left shell through the right cable wheel shaft inner cavity and the left cable outlet; a right rocking handle shaft is arranged in the right shell; the right end of the right rocking handle shaft extends out of the right shell, and a right rocking handle is arranged at the right end of the right rocking handle shaft; the left end of the right rocking handle shaft is positioned in the middle shell; and a driving gear is arranged on the right rocking handle shaft, is positioned in the middle shell and is meshed with a driven gear.

Description

technical field [0001] The invention relates to a special cable length adjuster for on-site inspection of a substation comprehensive automation system. Background technique [0002] In the acceptance and defect elimination work of the measurement and control devices of ultra-high voltage substations, a large number of telemetry addition tests and remote signaling tests are required. The telemetry augmentation test refers to using a standard source to directly output standard voltage and current to the device through the augmentation test cable to check whether the measurement results of the device are correct and whether the accuracy is sufficient. The remote signaling test is to short-circuit the remote signaling power terminal and remote signaling input terminal on the terminal block with a wire, so as to simulate the sending of a remote signaling signal, and check whether the remote signaling settings of the device and the background are correct, and whether the photon c...

AI Technical Summary

Problems solved by technology

[0003] In the process of conducting remote signaling tests, the test lines we use are often temporary test lines made by stripping the insulation layer from the head and tail of ordinary cable cores. Using this test line is not only inconvenient to carry, the length cannot be changed, and often Temporary production is required

The situation is relatively better during the telemetry test, but because the test lines are easily twisted together, it takes quite a while to unfold and store the cables every time they are used

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