Production method of transformer low-voltage side busbar sheath

Abstract

The invention relates to a method for producing a busbar sheath on the low-voltage side of a transformer. The method comprises the steps of: mixing 10-25 parts by weight of fluorine-containing polydimethylsiloxane, 40-50 parts by weight of vinyl-containing polydimethylsiloxane, 10-20 parts by weight of reinforcing filler, 1 ‑5 parts by weight of treated para-aramid staple fiber pulp, 10‑30 parts by weight of anti-loss filler and 1‑3 parts by weight of pigment are mixed, and the mixture is mixed in an internal mixer at 110°C and pressure<0.2Mpa Knead for 4 hours, take it out and roll it on the open mill and park it for soaking for a week, add 1-3 parts by weight of vulcanizing agent to the parked soaked mixture on the open mill, re-roll it for three times, and refine it through a twin-screw extruder , and then through an extrusion molding machine, extruded at a high temperature of 400-600°C, calendered, and drawn, and finally vulcanized in a 200-300°C vulcanization furnace for 10-20 minutes in a second stage to obtain a busbar sheath. It has good insulation performance, simple process and convenient use.

Description

technical field [0001] The invention relates to a production method for a sheath, in particular to a production method for a busbar sheath on the low-voltage side of a transformer. Background technique [0002] At present, short-circuit tripping and power outage accidents frequently occur on the low-voltage side busbars of transformers due to small animals and foreign objects overlapping between phases. The original heat-shrinkable insulation sleeves need to be disassembled and put on heat-shrinkable insulation sleeves, which are heated on site at high temperature. Bake the sheath until it shrinks before installing the device. It is labor-intensive and time-consuming, and because it is not resistant to aging, its reliability cannot be guaranteed for a long time. Contents of the invention [0003] In order to overcome the disadvantages of the prior art, the invention provides a method for producing a transformer low-voltage side busbar sheath, which has good insulation per...

AI Technical Summary

Problems solved by technology

[0002] At present, short-circuit trips and power outages frequently occur on the low-voltage side busbars of transformers due to small animals and foreign objects overlapping between phases. The original heat-shrinkable insulation sleeves need to be disassembled and put on heat-shrinkable insulation sleeves, which are heated on site at high temperature. Bake the sheath until it shrinks before installing the device

It is labor-intensive and time-consuming, and because it is not resistant to aging, its reliability cannot be guaranteed for a long time