Overall, intuitively, the structure of this switch is a bit like a "V" gesture made by a person with two fingers stretched out when taking a photo, with circuit outlets on both sides and a switch contact point hidden in the fuel tank at the bottom of the middle.

Of course, this is a three-phase alternating current, so there are actually three "Vs", three switches are inserted in parallel on the bottom bracket, this thing looks quite neat, white paint brushed bars, porcelain tiles are also spotless after the baptism of rain, rippling in the sun with proud flash.

Wait, Zhang Yifu is wrong, this is the No. 2 outlet switch next to it intact.

Turning his head, the blown No. 1 switch has long been unable to see the structure of half a "V", the blow that should be blown up, the pour that should be poured, the three "Vs" have long been shattered, and the white main steel structure has also been blackened, not crippled and disfigured.

Miao Delin is undoubtedly the one with the most sad mood at the moment, he pointed to the middle part of the switch, which has been completely reduced to the scene of the car accident, the place where the missile wreckage was: "At that time, our factory carried out the closing of the No. 1 outlet switch, and the B-phase switch suddenly exploded, and at the same time affected the A, C-phase switches, the porcelain bottle of the A-phase switch was broken, the main body of the C-phase switch was toppled, and the No. 1 outgoing switch produced strict ZHòng fault grounding, bus failure, and then the whole plant tripped. ”

Everyone knows about this, and the question is why it exploded.

After a short silence and regret, Nangang asked, "Have you ever moved after the accident?"

"Absolutely not, the line was immediately deactivated, and the scene was not touched until the investigation. Miao Delin hurriedly said. "Of course, it had been raining last night and could have been washed away by the rain. ”

"Hmm. Nangang took two steps forward. Squatting on the ground, looking left and right, looking at the black and yellow oil stains on the remaining metal structure next to him, squinting his eyes and asking, "Is there a problem with the insulating oil?"

"No problem, the oil level is normal and the replacement cycle has not yet arrived. Miao Delin nodded, "Director Nan." Every one of our operations is recorded, and this closing is definitely in accordance with the regulations. It is also in line with the dispatching instructions of the Electric Power Authority. ”

"Well, if the rules are not standardized, if the characters are not compliant, there will be on the record. Miao factory director. You're trying to say that it's a problem with the equipment, right?" Nangang slowly got up, glanced at the scene of the accident again, and then looked at the switches around him, "How long have these switches been used?"

"Replaced a year ago, the USSR ...... Oh no, Russian-made switches. Miao Delin replied with sincere fear.

"It's been a year, how many operations have been carried out, how many times have they been divided and merged. Why is it only this accident? So many power plants across the country use this switch, why is it only your factory that has an accident?" Nangang said, walking in front of Miao Delin. patted him on the shoulder, "Director Miao, I am in charge of safety, whether it is an equipment problem or an operation problem, it can't escape my eyes." ”

Miao Delin's body trembled slightly, and he looked at the indifferent Nangang. looked at Zhao Wenyuan, the boss here, and wanted to say something. In the end, he only bowed his head and sighed, and swallowed back everything he was about to say.

Nangang also ignored him anymore, and rushed around: "Come, let's also study and study together to see if anything can be found at the scene of the accident." ”

After the explosion of the fuel tank in the middle switch, the metal was reduced to blackened scrap metal, and the porcelain bottle became slag, which had long been unrecognizable, but the two AC phase switches next to it were still in a state of broken threads.

Whether it is in charge of safety, operation or production, seeing this tragic situation can imagine what the accident looked like.

"It looks like the insulation has broken down. ”

"It's hard to imagine how violent the arc was at that time, and it could be blown up even though the insulating oil was still there. ”

"Could it be a problem on both sides at the same time?"

"It's hard to say, let's take a look at the operation record in a moment. ”

"How long have these switches been in use?"

"Look at the label is EMC-7 series equipment, many power plants in North China and Northeast China are using it, there is no problem. ”

"After all, it is Soviet equipment, and safety is guaranteed. ”

A bunch of people discussed it on the spot, but in fact they didn't carry any testing equipment with them, and most of their remarks and conclusions at this time relied on experience.

No matter how clever Zhang Yifu's technology is, there is so much experience, plus the people who come to investigate are either big leaders, or old backbones who have been working for more than ten years and decades, and most of them are experts in the industry, so it is really not Zhang Yifu's turn to say anything, and he also knows that Zhao Wenyuan called himself to investigate, just to give him a chance to show his face, but he did not mean to let the Jibei Power Plant come out in the investigation.

The steady Zhang Yifu didn't have much to do at this time, and gradually broke away from the large army, and began to look at the relatively complete switch next to him, the destroyed switch over there was already unrecognizable, and it was difficult to show anything.

Almost at the same time, two other people were doing the same thing, setting their sights on switch group 2.

The three of them appeared at the same time and smiled at each other.

"Zhang Yifu. Yao Xinyu was more cheerful than he imagined, he gently raised his glasses and reached over generously, "I was in a hurry last time, and I didn't have time to talk in detail, I'm sorry." ”

"Where, where. Zhang Yifu understood this, last time he and Yao Xinyu accompanied their respective factory directors, not to say much, at this time it is much more casual, he took the opportunity to introduce, "This is Xia Xue, from the dispatch bureau of the ministry, and I am an alumnus." ”

"Hello, hello. Yao Xinyu stepped forward to shake hands with Xia Xue, quite enthusiastic.

"Hello. Xia Xue reluctantly responded, and ignored Zhang Yifu, thinking that she was still losing her temper with him.

After getting to know each other, the three of them naturally talked about their opinions, these three are all newcomers, and they only communicate privately, so naturally they don't have to worry so much.

"It doesn't feel like a problem with operation. Yao Xinyu did not hide his point of view, and directly said his opinion, "I have read the operation record, I also participated in the maintenance, and I came for the first time after the accident, so I really can't find any fault." ”

"What do you mean......" Zhang Yifu squinted at the running switch, "something is wrong with the equipment?"

"It's hard to say, but at least it's not a big problem. Yao Xinyu turned to look at several other lines, "You see, there are a total of five lines here, at that time, only Line 1 was in the open state, and there were four lines in operation, in this case, Line 1 was closed, even if there was negligence in operation, there were other four lines around, it stands to reason that there should not be such a big movement." ”

Zhang Yifu thought about it briefly, Yao Xinyu's big concept is not wrong, this kind of closing with a very low risk coefficient should not have a problem, but the specific problem is analyzed in detail, and if you look at it comprehensively, there is actually a breakthrough point.

Xia Xue looked at the leaders who were pointing at the wreckage next to her, and also said, "Why are they all staring at there? Staring at the operation, shouldn't they check the equipment first at this time?"

ps: Don't say anything, the recommended ticket can also be ......

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