Alternating-current and direct-current self-adaptive high-efficiency temperature control low-voltage cable branch box

Abstract

The invention relates to a high-efficiency temperature control low-voltage cable branch box which comprises a box body. The left side and the right side of the box body are provided with a plurality of heat dissipation windows from top to bottom, the upper portions and the two sides of the heat dissipation windows are wrapped with installation bases, and protective covers are movably arranged on the heat dissipation windows; and two exhaust fans, two air inlet fans and an alternating-current and direct-current self-adaptive power supply are fixedly arranged in the box body, and temperature control switches are electrically connected among the exhaust fans, the air inlet fans and the alternating-current and direct-current self-adaptive power supply. The protective covers and the installation bases are combined in a double-side groove-convex groove inserting mode, and installation is convenient. Each temperature control switch monitors the temperature in the box in real time, when the temperature exceeds the limit, the exhaust fans and the air inlet fans are started, air cooling circulation is forced, and the heat dissipation effect is further ensured. The exhaust system uses an alternating-current and direct-current self-adaptive power supply to meet the requirements of experimental tests and facilitate on-site actual power utilization.

Description

technical field [0001] The invention belongs to the technical field of power distribution and heat dissipation, and in particular relates to a powerful temperature-controlled low-voltage cable branch box. Background technique [0002] As of January 2021, according to the inspection by the Quality Inspection Center of Zibo Power Supply Company, the current 0.4kV low-voltage cable branch box and 0.4kV low-voltage integrated distribution box generally have the problem of unqualified temperature rise test, and the pass rate is less than 10%. The main reason for the failure is that the heat dissipation capacity of the box shell is insufficient. After rectification of unqualified products, manufacturers generally adopt the method of adding fish-scale heat dissipation windows to increase the heat dissipation area of ​​the box. However, after testing again, it was found that the temperature rise test of the rectified product passed, but the waterproof spray test of the IP protectio...

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Problems solved by technology

[0002] As of January 2021, after testing by the Quality Inspection Center of Zibo Power Supply Company, the current 0.4kV low-voltage cable branch box and 0.4kV low-voltage integrated distribution box generally have the problem of unqualified temperature rise test, and the pass rate is less than 10%.

However, in the testing of each testing center, according to the provisions of GB7251.1-2016 "Low-voltage switchgear and control equipment, Part 1: Type test and some type test complete sets of equipment", the DC power supply used in the temperature rise test, in the development type The fan cannot be started during the test, and the cooling effect of the fan cannot be verified

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