Three-phase power meter with transformer recommended program
The disadvantages of your current three-phase current transformers are:
1) The reasons for the above problems are: high cost, large volume, and heavy weight. The reason for the above problems is that many manufacturers of transformers will use linear thinking methods to solve problems in order to achieve the accuracy required by the users. The conventional method is to increase the number of initial windings, plus Large iron core cross-sectional area, increase the number of secondary turns, which means that the input 1mA × primary turns = actual input current, to avoid the error brought to the transformer when the low current input. From the surface, it solves practical problems, but it brings problems such as higher material costs, increased labor costs, and safety.
2) There are too many specifications. It can be seen from the above that the actual input current of the transformer will be increased if the primary turns increase, so that the low-end meets but the high-end will not reach, because the input current is too large to cause saturation of the core, and the volume remains unchanged. Under the circumstances, it can only be resolved in terms of specifications. Such as 1.5 (6) A, 1.5 (15) A, 5 (20) A, 20 (80) A and so on.
3) When inputting a small current, the angular difference and linearity do not meet the requirements. When the low end and high end are input, the software compensation does not make up the bit.
We provide improvement plans as shown below:
We solve the above defects through high-precision transformer technology. The only difference in the following figure is that the volume is smaller, the primary line only goes around 2 turns, the load resistance can be increased, the installation method is unchanged, and on the basis of existing methods, only Need to change the sampling resistance value.
Your company is using Figure 1
Solution Diagram 2
If your company is willing to accept our above plans, it can bring the following benefits to your company:
1) The cost savings are at least 15% or more. Calculated at an annual consumption of 1 million. Calculated at the unit price of 18 yuan to 20 yuan for the current market, each year can save about 2.7 million for your company.
2) The measurement specifications will be reduced. There will be at most 2 to 3 full covers, which will reduce your company's procurement and management costs. It is estimated that there should be about 1%.
3) To achieve your company's wide range of high-precision measurement requirements, from the input rated 0.2% to MAX accuracy assurance 0.05%. If your company is willing to try, our company can provide samples and measuring instruments to verify the solutions and products.