High pressure resistance element

Abstract

A high pressure resistance body element superior in heat resistance, anti-dielectric breakdown property, anti-shock property, and durability, and most convenient for maintenance, inspection, servicing, and replacement repair. It is composed of a cylindrical outer sleeve of metal, a coil-like resistance heating wire stretched between the inner ends of electrode bars respectively inserted in the outer sleeve from the opposite ends thereof, an insulator filled between the resistance heating wire and electrode bars and the inner wall surface of the outer sleeve, and baked, and insulation sleeves removably fitted to the regions close to the opposite ends of the outer sleeve bridgewise supported at the opposite ends thereof by disposition plates to extend through the latter.

Description

technical field [0001] The present invention relates to a high-voltage resistance element as a high-voltage metal resistor used in a load characteristic test of a high-voltage power generation device. Background technique [0002] Conventionally, as load resistors used in load characteristic tests of generators, image 3 A high-voltage resistor element 1' with tripping sinker 9 is shown as shown. Referring to this figure, 2' is a cylindrical outer cylinder having a length of about 1 m. [0003] In addition, 3 is a resistance heating wire, 4 is an electrode rod, and 5' is an insulator filled between the resistance heating wire 3 and the electrode rod 4 and the inner wall of the outer cylinder 2' and sealed by the sealing member 6. The insulator 5' is formed in a powder form and functions to insulate the outer cylinder 2' from the resistance heating wire 3 and the electrode rod 4. [0004] 7 is a terminal for connection, which is clamped and fixed on both sides by nuts 8 and...

AI Technical Summary

Problems solved by technology

[0015] That is, because the knock-off sinker 9 becomes a hindrance to ventilation, turbulent air flow and disturbing air flow are generated in this high-voltage load resistor unit 13, and the phenomenon of vibration cannot be avoided as a result. To avoid the above problems, but the risk of testing still cannot be removed

[0016] In addition, since the insulator 5' enclosed in the outer cylinder 2' of the high voltage resistance element 1' is in powder form, not only the moving piece is vibrated due to the external force, but the moving piece cannot be covered uniformly and thickly, and local insulation is insufficient, resulting in The problem of the cause of insulation breakdown also has the problem of poor heat resistance due to the insulation powder, so the glow resistance heating wire 3 is also prone to vibration during operation, easy to break, and poor heat resistance.

Not only that, but at present, the cause of most of the failures handled by the operator's misoperation is not very clear

[0017] And, by long-term test results, it can be seen that the shape of this knock-off sinker 9 is used for heat dissipation, but because its front end is pointed, it becomes high pressure from the front tip 9a, 9a... (refer to image 3 ) produces corona discharge in the initial stage, and finally produces arc discharge between the square frames 12, causing insulation damage

Existing high-voltage resistance element 1' cannot carry out load characteristic test without risk

[0018] Insulators 16 are provided as a safety measure when insulation damage is caused by arc discharge. However, since there is no escape place for high-voltage overcurrent, there is a risk of burning and damage to the high-voltage load resistor unit 13 as a whole. Operators cannot operate due to danger during work. near

[0019] In the above, because of the knock-off sinker 9, it is difficult to see through the inside from the top of the square frame 12, which becomes an obstacle in maintenance, overhaul, and maintenance. Moreover, the high-voltage resistance element 1' that is burnt or disconnected cannot be removed from the square frame 12 laterally. Take it out, so it cannot be partially exchanged at the work site, and must be brought back to the factory one by one. There is no way to perform partial exchange on the basis of removing other high-voltage resistance elements 1′, and the load characteristic test must be interrupted and postponed.

Images