[Disassembly] 5 nuclear LED bulbs, 6 3W LED bulbs

I bought five six kinds of LED lights, 1.05 yuan unlicensed, 1.8 yuan IC constant current, 2 yuan Pinto, 3 yuan Yapp IC constant current, 4.8 yuan bright and beautiful flow, 9.9 yuan Tsinghua Tongfang resistance constant current, are ultra-cheap civilian goods, look at it to see if it is value for money, or fish in troubled waters?

First, the last 3D LED light dismantling diagram of the 1.8 yuan package received today, IC constant current drive.

The measured power is rather strange, the power is up to standard, but the brightness is very poor. It seems that the led chip is too small, and the brightness is not as bright as the “product extension” of 2.7w. The total voltage applied to the led group is 9.24v current 245mA.

More than half an hour, the case temperature is 58 ° C

Short circuit power and current.

For Oil Immersed Power Transformer, we can produce voltage from 35kV to 500kV, capacity upto 460MVA. We use the best quality of raw material and advance design software to provide low noise, low losses, low partial discharge and high short-circuit impedance for power transformer.

Our power transformer are widely used in national grid, city grid, rural grid, power plant, industrial and mining enterprise, and petrochemical industry.

Power Transformer

Cast Resin Transformer,Power Transformer,Renewable Transformer,Power Transformer With Oltc

Hangzhou Qiantang River Electric Group Co., Ltd.(QRE) , https://www.qretransformer.com