Pouring technology for all-fiber optical current transformer

Abstract

The invention discloses a pouring technology for an all-fiber optical current transformer. Firstly, epoxy resin castables are obtained and then subjected to preheating and drying treatment; then the epoxy resin castables are placed in vacuum and subjected to mixing and defoaming treatment; a transformer semi-finished product is placed into a mould and preheated; finally, the defoamed epoxy resin castables are placed in vacuum and subjected to pouring defoaming treatment; and after pouring is completed, a mould is subjected to solidification demoulding treatment, and a transformer pouring body is obtained. The pouring technology for the all-fiber optical current transformer adopts a full-vacuum pouring technology and has a good applying effect on transformer type high voltage electric energy meter. Burdening, mixing and the whole process of pouring are all in a vacuum state so that bubbles in a pouring product can be reduced to a large extent, electric insulation strength and mechanical property of the product is improved, the yield of the product is improved, and the cost of the product and labor intensity are reduced. Epoxy resin has excellent electric insulation performance and high mechanical strength, heat resistance and chemical attack resistance are achieved, the cure shrinkage rate and the linear expansion coefficient are good, and dimensional stability and manufacturability are good.

Description

technical field [0001] The invention relates to the field of current transformers, in particular to a casting process for an all-fiber current transformer. Background technique [0002] At present, a large number of 10kV high-voltage power metering boxes or power metering cabinets are used in the distribution network for power metering. It converts high-voltage large voltage into standard low voltage through multiple high-voltage electromagnetic current transformers and electromagnetic voltage transformers, transforms high-voltage large current into standard low-voltage small current, and connects to the electric energy meter to measure high-voltage electricity. Traditional electromagnetic transformers have many disadvantages, such as: many accidents, high energy consumption, high consumables, poor error characteristic curve and cannot be uniquely determined, inconvenient management, and difficulty in preventing electricity theft. [0003] The biggest advantage of the curre...

AI Technical Summary

Problems solved by technology

However, the requirements for the accuracy of all-fiber-optic current transformers are getting higher and higher. Due to the limitation of the manufacturing process of current transformers, the accuracy of all-fiber-optic current transformers needs to be improved.

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