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Looking back at the competitors who were gloating in the corridor, Peng Huading pursed his lips, then stuffed his mobile phone into his trouser pocket, turned around and walked towards Wu Shibo, and said, "Director Wu, I want to see the rectifier distribution room." ”

Wu Shibo was obviously stunned, but many of them recovered to normal, and said, "Please." ”

The word "please" in his mouth made Peng Huading inexplicably increase a lot of confidence. When the young flight attendant opened the computer room on the right side of the corridor, Peng Huading calmly walked in.

Facing him are three cabinets, from the outside to the inside, which are DC distribution cabinets, rectifiers, and AC distribution cabinets. About two meters away from the AC distribution cabinet, a little further inside is the bed of the operator on the night shift.

The DC distribution cabinet is responsible for transmitting DC power with a voltage of minus 48 volts to the switch, optical transmission equipment, network router and other equipment in the computer room of the fixed network company.

The middle rectifier is still the old-fashioned bridge rectifier technology, and its basic principle is to first use a step-down transformer to step down the 380-volt AC mains, and then use the bridge rectifier to rectify the low-voltage current, and then supply power to the battery or DC distribution cabinet. Instead of taking the most advanced switching power supply technology at the moment.

The AC distribution cabinet is connected to the 380-volt AC mains grid on the one hand, and the rectifier input port on the other.

Although the equipment here is old, it is also standard distribution room equipment.

The buck rectifier emits an even hum sound, the various instrument panels are displayed normally, and the floor is very clean.

Wu Shibo said with a smile: "You check and inspect well, and please give more opinions on our maintenance, hehe." ”

A staff member of a manufacturer also sneered: "Hehe, the leaders of Huakang Company inspect the work of the branch of the fixed network company. ”

Peng Huading ignored their ridicule and ridicule, originally he just wanted to gamble when he came in, and he was not absolutely sure in his heart. Because he knew that if he just stared at the battery in the computer room, he wouldn't be able to see anything wrong with his low technology, not to mention that it was impossible to leave too many mistakes on the scene for him to appear, and if any, they would have covered it up, so it was better to get lucky here.

Peng Huading looked at the three cabinets, thinking about the scene he had just seen from the window, and at the same time remembered the scene of taking a taxi all the way here: most of the roads from Nanyuan County to here are gravel roads, only when leaving the county seat and entering the town, it is a little better, but even if the cement is exposed, it is still potholes, whether it is the road or the trees on both sides of the road, it is very dusty. The houses of the farmers on the roadside are not high-end, and there are not even a few two-story buildings. The peasants walking on the side of the road all looked listless......

This qiē fully shows that the economy here is not up to standard, which means that there are certainly not many installed users here, and the switch module here loads very few telephones, and the power consumed is also minimal. In addition, this is a poor rural area, and the supply of municipal electricity is certainly not good, and there may be frequent power outages.

Thinking of this, he asked Wu Shibo: "Director Wu, this communication accident was caused by a mains power outage for a long time, right?" ”

Wu Shibo replied, "Yes." But power outages lasted less than nine hours, which is common in rural areas. It stands to reason that your battery can fully guarantee the load of more than 30 hours, and it will not lead to communication accidents at all. ”

Peng Huading nodded, and said in his heart: "In less than nine hours, this situation is indeed not uncommon in the countryside. Sometimes it is possible to stop for two days in the countryside. Two sets of 4ooah batteries can indeed ensure the supply of the load during this time. There are not many users installed here, and the power consumed by the switch is naturally small and ......, and slow, is the problem here, the cause of the communication accident is that the capacity of the battery is too large? ”

As soon as this question arose in his heart, Peng Huading's two eyes lit up.

If you are a layman who does not understand the performance of the battery, you must think that the larger the capacity of the battery, the better. Because the larger the capacity, the longer the discharge time of the battery under a certain load, the more it can ensure that the switch equipment and optical transmission equipment can be used for a longer time after the AC power interruption, and the more stable the telephone communication can be maintained.

However, in fact, the load carried by the battery can not be too small, but it cannot be too large, and the designer must pay attention to the matching of the equipment load and the battery capacity before purchasing the battery.

Of course, the relative load of the battery is too small, in that case, the power will run out before it has been put for a few minutes after the mains power failure, and there will definitely be a communication accident. However, if the load is too small, or the capacity of the battery is too large, the damage to the battery will be very severe if it is used for a long time, and it is easy to cause irreversible damage to the battery. Once the battery is damaged, it is naturally easy to have a communication accident. However, this damage to the battery can only occur after a period of use.

Although Peng Huading is not an expert in batteries, he still knows the disadvantages of small current discharge: if the large current and small current collapse the battery at the same time (referring to the storage battery accumulated in all the electrical energy is exhausted, there is no longer current output), the battery after the collapse of the high current can also be used to restore most of the performance of the battery through the scientific charging method. If the battery is collapsed by a small current, their performance is often difficult to repair, especially if the charging method is not very scientific, they will be permanently damaged and become waste.

Even if the batteries do not collapse, if they are discharged and charged at a low current for a long time, their performance will become worse and worse, and their actual capacity will become smaller and smaller, until they are scrapped. In fact, this phenomenon is very easy to understand, just like when we buy a mobile phone, many times the merchant will tell you that the battery of the mobile phone will be cleaned and then charged, and then used clean and charged, so as to ensure that the battery capacity is larger.

The high current and small current mentioned here are relative to the capacity of the battery. The same amount of current is a large current compared to a small-capacity battery, but now it is a small current for a large-capacity battery.

That is to say, the battery must be equipped scientifically according to the size of the load power.

Thinking of the economic situation in this town and the surrounding towns, Peng Huading guessed that it was impossible for this computer room to use a battery pack as large as 4ooah, and the capacity of 1ooah should be about the same.

It is precisely because two sets of 4ooah batteries are used here, the battery can only be discharged with a small current and charged with a small current for a long time, and the performance of the battery deteriorates after a long time, and its actual capacity is greatly reduced, the nominal is 4ooah, maybe less than 4oah, so the outside of the mains power stops, their electric energy will be quickly exhausted, and communication accidents will occur!

The more he thought about it, the more Peng Huading felt that it made sense.

However, when he looked at the number displayed by the load ammeter on the rectifier, he couldn't help but feel a little disappointed: because the number displayed on the DC meter was fifty-five amperes, although this number was a little low, it was still within the optimal range of the load of these two sets of batteries!

"How is it completely different from what I expected? My guess was wrong? Peng Huading's eyes looked back and forth on several mechanical meters, looked at the meters on the rectifier cabinet, and then looked at the meters on the distribution cabinet, and asked himself in disbelief: "Are there so many users who have telephones here?" ......, it's impossible. ”

When he inadvertently looked at Wu Shibo, he saw that Wu Shibo's gaze was a little dodgy, as if he wanted to stop him from looking again.