Courtyard: The opening game robbed Lou Xiao’e into the small world

59 Cameo as a driver Electric rescue (plus 7)
Jiang Hao thought for a while: “Uncle Yang, wait a minute, I’ll go get some test tools, otherwise I’ll run back when I need them, so I’ll bring two people over to help.”
“Well! Let’s go. By the way, my driver is out. I heard you can drive, right? I’ll give you the car key. The car is the jeep downstairs.”
“Okay! But, Uncle Yang, I can drive, but I don’t have a driver’s license!” Jiang Hao reminded.
“It’s alright, as long as you can drive, no one will check it. It’s important to do things. We are also saving the losses for the country.” Director Yang looked indifferent. Today’s cross-Js should not be as good as later generations. In this era, everything is based on leaders and the tasks of leadership.
Jiang Hao drove to the door of the office, called Zheng Yang and Tao Aihua together, brought the relay protection tester, insulation test equipment, multimeter, common tools, etc. into the car, drove to the downstairs of the factory director’s office, took the factory Let’s go to the Brothers Factory together.
Zheng Yang and Tao Aihua are very envious of Jiang Hao. Most people can’t get in this car now, and they won’t have the opportunity and skills to drive. Jiang Hao not only has strong professional skills, but can even drive a small car.
When they arrived at the destination, the factory manager of the other party and the people in the electrician class were already waiting there. The factory manager of the other party clenched the hand of Director Yang and said excitedly, “Thank you for the strong support of Director Yang of the brother unit.”
Director Yang said calmly and authentically; “It’s okay, it’s okay, my brother is in trouble, come to help from all directions, we are a brother unit, it should be. Tell us about the situation on your side, Xiaojiang.”
The factory manager of the other party was stunned when he saw such a young Jiang Hao. Manager Yang knew what the other party was thinking, and he explained: “Don’t underestimate Jiang Hao, although he is young, he is more knowledgeable about our factory’s electricity than ours. The director is much stronger, he also brought a lot of professional equipment, you can rest assured.”
Jiang Hao, Zheng Yang and other three people carried their own testing equipment, and the rest of the electrical equipment from this factory helped to move them. The electricians were stunned when they saw so many professional toolboxes in the rolling mill. Jiang Hao said to the factory manager and the electrician, “Let’s go to the scene first, and talk to us as we walk along the road. Tell us about the general situation of the matter.”
After the introduction of the other party, it turned out that they were excavating the road today and cut a low-voltage cable, causing the low-voltage cable to short-circuit and burn, and several surrounding cables were also burned, and not only the low-voltage outlet switch tripped, but also the general The switch and transformer protection fuses were also blown. Because they were anxiously waiting for electricity, their electricians had never encountered such a fault, and they came to ask for help because they didn’t know how to deal with them.
Jiang Hao took someone to the high-voltage power distribution room, disconnected the faulty circuit switch, and connected it to the ground, then went to the distribution power station, and looked at the two high-voltage fuses that were burned, as well as the transformer and low-voltage mains. Switches, outgoing switches, and burnt low-voltage cables. Finally, let someone cut off a large section of the burned low-voltage cable together. The rest of the upper and lower cable sections are subjected to a withstand voltage test with a megohmmeter and low-voltage power frequency withstand voltage equipment to ensure that there is no fault, and then ask the electrician to find a new section. For low-voltage cables, connect the two sections together, take insulation, waterproof and pressure-proof measures for the connection port, and perform an insulation test again.
Then reset the protection setting value of the low-voltage outlet switch and the main switch according to the actual load value, and do a good job of differential setting. Re-do the three-phase loop resistance and insulation test of the transformer. After ensuring that there is no problem with the transformer, replace the three fuses on the high-voltage side.
The manager of the other party asked, “Xiao Jiang, only two fuses have been burned, isn’t the other one good?”
Jiang Hao explained: “Because the single-phase ground fault and two-phase short-circuit occurred in the equipment successively, the original high-voltage three-phase current has been unbalanced, and although the other fuse has not been blown, the fuse characteristic curve has changed. If the load reaches a certain limit value, the fuse will easily burn out and malfunction. The protection of this switch is three-phase linkage. As long as one phase of the fuse is blown, all three phases of the switch will be tripped, that is To prevent the transformer from running without phase for a long time and damage the transformer and the electrical equipment below, this time the single-phase electrical equipment below should have burned out?”
The factory manager was surprised: “How did you know?”
Jiang Hao said with a smile: “You guys broke the zero line first. The single-phase equipment lacks the zero line, which will easily lead to serious deviations in the three-phase voltage with the unbalanced load. Therefore, it is easy for equipment that is more sensitive to voltage. Burned to the power module.”
The factory manager didn’t understand what it meant, so he nodded along with everyone. Jiang Hao helped him to reset the setting of the upper switch of the fuse. As for the main drop station, that is the jurisdiction of the power company. Jiang Hao does not have the qualifications to do this.
After everything was settled, Jiang Hao brought people to check the lines and equipment at all levels again, and then brought people to remove the grounding of the upper-level high-voltage cabinet, closed the vacuum circuit breaker, and sent the electricity up level by level.
The factory manager was very excited when he saw the power recovery of the faulty circuit of the factory. He left the rolling mill and his party that night to have a friendly exchange in the small canteen. Because it was extra assistance, the factory gave each person in the electrician class a red envelope. Jiang Hao took it easily, Xiao Qian didn’t care about him, but if he didn’t take it, the other two would not dare to take it.
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