Measurement transformation ratio adjustable low-voltage current transformer device

Abstract

The invention relates to the technical field of a multi-machinery device and more particularly, relates to a measurement transformation ratio adjustable low-voltage current transformer device. The adjustable low-voltage current transformer device comprises a box body and a transformation ratio adjustable current transformer; the current transformer is mounted in the box body; the box body is of anopenable box body structure; and the box body is provided with a locking structure for avoiding random opening. According to the invention, for cases of changes of an electrical load, generation of capacity increasing and decreasing and the like, which are caused by factors that electrical loads of certain clients or areas are unstable and fluctuated a lot, certain enterprises regulate productionalong with changes of the industry economy or the market and the like, transformation ratio regulation of the current transformer is more flexible and rich in elasticity, and use requirements can bemet only by enabling measurement, operation and maintenance personnel to go to the site to regulate the transformation ratio of the transformer, so that the industry expanding flow of replacing a measurement device and waste caused by replacement of the current transformer are reduced, and cost of manpower and material resources is greatly reduced.

Description

technical field [0001] The present invention relates to the technical field of multi-mechanical devices, and more specifically, relates to a low-voltage current transformer device with adjustable metering transformation ratio. Background technique [0002] At present, there are many types of low-voltage current transformers for metering according to the transformation ratio. According to the transformation ratio, there are various current transformers such as 75 / 5, 150 / 5, 500 / 5, and 600 / 5. Even if the current transformer with a center tap It is also possible to increase a transformation ratio. In this case, the design and application cost of the fixed-ratio current transformer is relatively high for both the manufacturer and the power supply company. [0003] A current transformer is an instrument that converts a large current on the primary side into a small current on the secondary side for measurement based on the principle of electromagnetic induction. The current tran...

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Problems solved by technology

[0004] For fixed ratio current transformers, manufacturers need to design and produce current transformers with various ratios according to the different needs of power supply customers, adding production lines and increasing labor costs; power supply companies need to purchase current transformers with various ratios Due to the increased pressure on warehouse management, the inaccurate demand calculation of relevant power supply departments, and the delay in the arrival of manufacturers, some current transformers of certain specifications are out of stock, resulting in a lag in the business expansion process, which has caused customer complaints and increased customer service. pressure

On the other hand, due to the different transformation ratios of the current transformers used for metering, while other uses and functions are consistent, duplication and waste

[0005] In addition, due to the current instability and large fluctuations in the power load of some customers or regions, some enterprises adjust the power load changes caused by factors such as industry economic or market changes, resulting in increases and decreases in capacity, making the current fixed ratio Type current transformers often cannot meet the needs of actual use, and there are "big horse-drawn carts" or overloaded operation. In this case, it is often necessary to replace current transformers with different transformation ratios on site. The actual operation is difficult. On-site power outages are required, which increases the cost of manpower and material resources

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