In addition, the top-notch standard also puts forward new requirements for fault ranging, the error should be within ±2%, the longer the line, the farther the fault point, the judgment error is undoubtedly greater, before the line protection products will have a ranging function, but there has not been such a detailed and accurate requirement, to achieve this standard, almost without fault ranging equipment, in the event of a failure, the accident point is determined by the microcomputer protection.

For Okamoto, the immediate results were enough to satisfy him.

At 85% and 90% of the two distance points, Mitsubishi products responded correctly to the fault; in 90% and 95% of the tests, the judgment was correct, but the action time was slightly longer, respectively, it took 27ms, 30ms to act, considering that after all, it is a new indicator in the future, this result is very good; 99% of the project hesitated, did not distinguish it, did not move, this is also allowed by the new standard, but it is just a fly in the ointment. The four trials, 101%, 105%, 110%, and 115%, also responded correctly and did not act.

Okamoto was very pleased with the results of Mitsubishi's tests, having achieved the most extreme precision and precision of his time.

As for fault ranging, Mitsubishi's distance judgment is stable at around ±3%, which fully meets the requirements of the original standard ±5%, but there is still a little gap with the top-notch standard ±2%, but it is gratifying enough.

Overall, Mitsubishi faced this new standard and handed over a 60-point answer sheet.

When analyzing the results, Schroeder also expressed his admiration: "With such a difficult and high-precision test, this result is already very good." ”

"Thank you. Okamoto thanked him and said, "Perfect electrical components, including distance calculation and signal judgment components, are the most accurate in the industry, which other manufacturers can't learn, and we have our own complete set of component systems." Up to the most. They have a way to get our components and barely end up with a tie, but doesn't that prove that others are using our technology?"

Okamoto's eyes didn't look at Zhang Yifu, but this sentence clearly pointed out.

"It's better to be clear. Zhang Yifu smiled generously, "Don't worry." In this test, our results must be significantly different, Schroeder and Thomas will witness all this, and please stop slandering Hengdian after seeing the results. ”

"No, no, you're mistaken, I didn't say Hengdian. Okamoto shook his head and said, "There is no way for Hengdian to obtain such a core electrical component as ours, even if the judgment method and algorithm are the same. The results will definitely be different. ”

"Come on. Zhang Yifu waved his hand and said, "After reading it, he can shut up." ”

In the midst of embarrassment, the test for Hengdian was launched.

Almost all Chinese are holding their breath at this time, waiting for one piece of data, they only hope that Zhang Yifu is not unreasonably confident, we have introduced such sophisticated and advanced evaluation equipment. For this moment!

FIRST OF ALL, TAKE 150KM AS A BENCHMARK. Conducting the first ground fault test at 85% of the distance, there is not so much time to brew and react, electricity, does not give you time.

Everyone was standing behind the computer in the main test, and the results were quickly displayed on a blue screen.

11ms。

Everyone looked at each other.

Even the testers were not convinced, and soon a second test at this distance was carried out.

10ms。

The third 12ms. The fourth 11ms.

It stabilized at 11ms, which is almost half the time of the new standard and much faster than Mitsubishi.

The ultra-long distance hardly causes any delay to the constant power, and it is still as fast and accurate as the line outlet failure.

In the midst of the consternation, there was also a certain suspicion. No one said a word and began to test at 90% of the distance.

Again, stable at 11ms.

The judgment time of 95% distance test is slightly longer, 16ms.

During the 99% distance test, the protection is judged by 20ms, and the area is tripped in the area.

After being confused for a long time in the face of this result, Okamoto finally figured it out with his eyes in his eyes, and said in a dumb voice: "I understand, Hengdian's products don't judge whether they are within the line distance at all, and they will be cut off immediately in case of failure, right?"

In the face of such fast, accurate and stable results, he can only think like this, Hengdian does not consider the judgment of the end of the line at all, Kenben does not consider whether it is a fault in the area, and jumps if there is a problem! Otherwise, it is impossible to achieve such a precise selectivity! It must be a simple and rude cut-off response!

Even Schroeder raised his glasses suspiciously: "At least in the product description, Hengdian does have a range judgment function." ”

In the meantime, he also began to doubt this.

Zhang Yifu didn't say much: "The results of the fault ranging test have also come in. ”

The results of the four fault point ranging were 85%, 91%, 95% and 98%, respectively, with an error of ±1%, which is almost zero error.

Schroeder stared at the screen with a frown, which was unbelievable.

Surprised, Zhang Yifu said to Okamoto: "Our product description is not water, as for whether there is a range of judgment function, you just need to continue to test to understand." ”

Yes, as long as the distance of 101% and 105% is judged correctly, you will know whether Hengdian is so rough, if you ignore the selectivity in order to protect the rapidity, in the face of such a fault outside the line area, it will inevitably trip.

However, the fact is that at 101% of the distance, the constant power protection makes the right judgment - no action.

In order to stabilize the sample, such an experiment was carried out four times, and Okamoto's expression also experienced a cycle, surprised, stunned, puzzled, and dazed.

The scene fell into an eerie silence, even if Hengden's products are at the same level as Mitsubishi, everyone is not surprised, this may just confirm Okamoto's statement, but the current situation is that it completely surpasses, and even surpasses the understanding of IEC experts.

In such an eerie silence, 866A also made a correct judgment in the range of 105%, 110%, and 115%, and did not move at all.

In less than two hours, the whole group of tests ended, and the constant current protection fully met the standard of 20ms action protection within 95% of the line with the results of no rejection and misoperation throughout the whole process, and even surpassed the new standard in the brewing, which can be called perfect.

The same unbelievable is the fault ranging result it gives, with this protection, the transmission line does not need to set up a fault ranging device at all! As long as the 866A output signal is received, the maintenance worker can immediately find the location of the treatment, which undoubtedly greatly reduces the manual line inspection time. The function of microcomputer protection embedding itself is the icing on the cake, and the flower of Hengdian is still blooming so brightly!

In the end, Hengdian handed over a full score as always, and 866A has fully met the line protection standards for three or even five years!

Mitsubishi has achieved the top of this era, but Hengdian is simply a future model!

In the face of this result, everyone still didn't speak for a long time, until Hu Haitao trembled and asked Schroeder to sign the result, Schroeder looked at Thomas blankly: "You also saw it, right?"

"Yes. Thomas swallowed and foamed.

"Sign?"

"Sign it......"

"Wait......" Okamoto said with a blushing face, "we can't rule out that they are doing ...... on the test equipment."

"Shut up!" Zhang Yifu suddenly pointed at Okamoto and was furious, he couldn't bear it anymore after being nagged by this person for so long, "I have already said before, when I see this result, shut up for me!"

Okamoto glared at Zhang Yifu and gasped: "I don't accept it." ”

"It doesn't matter. Zhang Yifu looked at the two IEC experts, "Two, do you agree with this result?" ”

Schroeder thought about it and said: "We are very careful to look at the whole process, there has been no change in the middle, we have also understood this set of test equipment, enough trust, the result is like this, there is no problem." ”

The two looked at each other and nodded, then signed their names.

"Impossible! This doesn't make sense!" Okamoto said irritably, covering his head, "No matter how sophisticated the device is, how can it be to this point??! the difference between 99% and 101% is really negligible! And this response speed, where do your components come from? Don't tell me that it is made in China!"

Zhang Yifu snorted lightly: "There is nothing to say about this, most of the components are imported from the United States, but our software system, our algorithms, and every one of our formulas are all thought up and knocked out by our engineers line by line, and the soul is here." ”

Okamoto was anxiously brewing for a long time before he said to Uncle Thomas: "May I ask if this standard has been evaluated by manufacturers, and whether there are any American manufacturers who already have this level." ”

Thomas shook his head after looking at Schroeder: "I just learned about this standard, you know that I am not a ...... of computer protection professional"

Schroeder took over the conversation, and his expression began to be unfriendly to Okamoto: "I can say responsibly, whether it is the United States or Germany, no line protection product in my cognition can meet this standard, at least for this kind of line distance protection, no one can surpass 866A." Okamoto, please also stop your suspicions and accusations about 866A, the facts are already in front of you, and I will contact you to clarify this matter when I return to Japan. ”

Okamoto's last little disobedience was extinguished by Schroeder's basin of water.

There is no room for IEC experts to say this themselves.

Schroeder, on the other hand, had obviously lost patience with Okamoto, and instead looked at Zhang Yifu curiously: "Would you mind sharing the technical theory of 866A on distance judgment?"

"Schroeder, this is really inconvenient. Zhang Yifu shook his head and said, "This is the new technology we first adopted, which has undergone a lot of experimental calculations, and has also increased the difficulty of our hardware design. (To be continued......)