Self-disengaging three phase combined over-voltage protector

Abstract

The invention relates to a self-release three-phase combined type overvoltage protector which comprises four zinc oxide valve plates FR, wherein, one end of the first zinc oxide valve plate FR1, the second zinc oxide valve plate FR2 and the zinc oxide valve plate FR3 is respectively connected with the phase-A end, the phase-B end and the phase-C end of a protected device, the other end of the first zinc oxide valve plate FR1, the second zinc oxide valve plate FR2 and the zinc oxide valve plate FR3 is respectively connected with the fourth zinc oxide valve plate FR4 in series, the other end ofthe zinc oxide valve plate FR4 is grounded, a release device BK is connected among the first zinc oxide valve plate FR1, the second zinc oxide valve plate FR2, the zinc oxide valve plate FR3 and a discharging gap CG in series, and the release device BK is sleeved on the first zinc oxide valve plate FR1, the second zinc oxide valve plate FR2 and the zinc oxide valve plate FR3. By modifying the release device, and on the basis of the original space, the release device is sleeved on the zinc oxide valve plates, so that the defect of limitation caused by the insufficient scene space is overcome, and the installation is convenient.

Description

technical field [0001] The invention relates to a self-disconnecting three-phase combined overvoltage protector. Background technique [0002] At present, although the indoor combined overvoltage protector can solve the problem of system phase-to-phase and phase-to-ground overvoltage, it cannot completely realize the purpose of system safety. The device collapses, causing a phase-to-phase short circuit accident, resulting in the explosion of the combined overvoltage protector. Therefore, it is necessary to use a combined overvoltage protector. For the safety of the system, it is also important to make the protector exit the fault, that is, the breakaway function of the protector. . [0003] Although the scheme of overvoltage protector series release is relatively mature and can solve the problem of overvoltage protector explosion due to aging, its implementation site is limited to outdoors. For indoor overvoltage protectors, especially combined Type overvoltage protector, ...

AI Technical Summary

Problems solved by technology

[0002] At present, although the indoor combined overvoltage protector can solve the problem of system phase-to-phase and phase-to-ground overvoltage, it cannot completely realize the purpose of system safety. The breakdown of the device will cause a phase-to-phase short circuit accident, resulting in the explosion of the combined overvoltage protector. Therefore, it is necessary to use a combined overvoltage protector. For the safety of the system, it is also important to make the protector exit the fault, that is, the breakaway function of the protector.

[0003] Although the scheme of overvoltage protector series release is relatively mature and can solve the problem of overvoltage protector explosion due to aging, its implementation site is limited to outdoors. For indoor overvoltage protectors, especially combined type overvoltage protector, there is no installation space for the release on site

The current releases are roughly divided into drop type, thermal explosion type and thermal fuse type. The former two are required for action space. Only the concept of thermal fuse type (that is, using a current-limiting fuse) is suitable for the overvoltage protector in the cabinet. use; however, due to space constraints on site, currently any form of current-limiting fuses cannot be installed

Therefore, in the solution of overvoltage protection, due to the space on site, it is impossible to achieve a complete implementation

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