How does the limited power Shuohua LR360 work?

Hello: 1. There are "fixed time limits" and "anti-time limits" for power limiters. Almost all of the commonly used limited current is an anti-time limit of nature. In addition, most of the triacs are used as actuators, and the limited current controlled by electromagnets is rare.

2. The principle of the "inverse time limit" limiter is that the larger the overcurrent and the shorter the delay according to the comparison between the overcurrent value and the set value, so as to adapt to the impact of the short-term starting current.

The current flows through the resistance of the limiter, it will produce a voltage drop at both ends of the resistor, the larger the current, the greater the voltage drop, when the action current set by the limiter is exceeded, this voltage will trigger the thyristor, suck the electromagnet and cut off the power supply, I hope it will help you.

High-powered electrical appliances are not allowed in student dormitories from now on.

Hefei ** News by the Ministry of Education, the Ministry of Public Security jointly signed the "Regulations on Fire Safety Management of Colleges and Universities" officially implemented today, which means that the use of high-power electrical appliances in densely populated places such as student dormitories is an illegal act. Yesterday afternoon, at the launching ceremony of the publicity and implementation of the "Regulations on Fire Safety Management of Colleges and Universities" in the new area of Anhui University, it was announced that the fire volunteer team of Anhui University students was officially established. After the establishment of the college student volunteer team, it will undertake the fire protection publicity work of major activities and daily campus life of the school, and take into account the supervision and inspection of the school's fire-fighting equipment, the implementation of fire rules and regulations, and the fire safety supervision of student dormitories.

The resistance of the heating wire of the electric cup is much smaller at low temperature than at high temperature, and its power can be more than 400 watts when it is first plugged in.

According to the comparison between the overcurrent value and the set value, the larger the overcurrent, the shorter the delay, so as to adapt to the impact of the short-term start-up current.

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Well, you're right, it's about limiting high current (high power), as you can see from its English name.

In fact, the main reason is that the circuit of the dormitory building is different from that of the residential building when it is designed, and the diameter of the reserved wire is relatively small, so it is easy to overheat and burn, so it is not allowed to use high-power electrical appliances.

The principle and function in the manual are as follows:

Limited current current protection device, electronic circuit breaker

It is a kind of electrical control device that limits the electrical appliances of the downstream control loop according to the size and characteristics of the electrical power.

It is through the access circuit in the connection circuit of the current, voltage, waveform signal to comprehensively identify, through the sampling unit to the line of real-time sampling to the operation unit and the set value comparison, the calculation results are transmitted to the control circuit for switching power.

Guarantee safety: make illegal electricity consumption impossible, fundamentally eliminate the hidden danger of circuit heating due to overload, and ensure normal electricity consumption;

Humanized management: there is no need to "inspect, confiscate and penalize" illegal electricity consumption, reduce management costs and avoid management conflicts;

Save electricity bills: automatically identify and prohibit the use of electrical appliances in dormitories such as fast heating, rice cookers, electric kettles, induction cookers, etc., ** overload electricity consumption, and reduce electricity consumption.

Wiring method: In the incoming end of each room or in the distribution box, as long as there is a live wire and a neutral wire, it can be wired.

I have a little solution...

You remove the grounded neutral wire of that three-way plug...

Some of them detect the current that protects the neutral line.

Of course, there is an easy way to deal with your circuit.

That's that 5V input pin on that relay, a 1k ohm resistor and 3 coin cell batteries...

That way, the relay will always be on at all times, and even if it is detected, your washing machine will still work properly.

Of course, it is not excluded that it is not the power limit used, but the nature of the load detected.

It would be nice to connect the red and blue lines directly!

There are three wires of the limited current, red, blue and yellow, remove the blue line of the limited current, suspend it, the limited current will not work, you can not be limited, you can also cut the blue wire or wrap the tape in the plug back, so that it can not be seen by the dormitory management.

The above answers are incorrect Because they don't know the working principle of the intelligent load identifier (intelligent limiter) To solve the problem, we must first figure out the root of the problem The restriction of the power of the intelligent load identifier (intelligent limiter) on the vicious load, when the load power exceeds the limit, it will automatically power off when the load power exceeds the limit, and it will automatically power on after the detection is normal, which can effectively prevent the use of illegal high-power resistive electric heating loads such as electric stoves and electric water heaters. Instrumentation loads, such as computers, televisions, electronic fluorescent lamps and other electrical appliances, can operate within the safe current-carrying range of the total power limit. In order to achieve the purpose of intelligent power rationing and power saving, the effect is very significant, that is to say, if the safe current carrying value range of your dormitory exceeds 1500W (that is, the power that heats up quickly), how you wiring it is in vain, but if the safe current carrying value of your dormitory is greater than 1500W (the power that heats up quickly), all that remains to do is to let the intelligent load identifier (intelligent limiter) not recognize whether it is hot fast and pure resistance (its practical 1000W It's hot enough to be enough) I don't know if your dorm uses this kind of identifier If so, do you have a computer power supply in your dorm?

If there is a computer power supply and a voltage regulator in parallel, it will be on the line, because the principle of the ballast is not very clear, for the time being, let's talk about this method for the time being, wait for me to go back, look at the principle of the ballast, and then tell you, oh yes, is your dormitory not a three-phase split line power supply, if not, from you**, use a live wire from the next dormitory to get the zero line, try if it is a 3-phase, just a dormitory, pull with the live wire, try As for the rectifier, I'll go back and see.

It is very dangerous to put the rectifier and on the socket, if the four are on at the same time, it will smoke and burn after ten seconds, you don't understand that it's better not to get it,

This is not recommended, because it is dangerous and unnecessary. I understand what you mean, that is, the electricity load in your dormitory is less than or equal to 3--500W, and it will automatically cut off and cannot be used, it is recommended to buy a second-hand UPS, and the power outage is not afraid, and it can also be used with high power, and it is safe, why bother? You say, don't you?

This kind of intelligent load recognizer is very sensitive, what is measured is the current, more than one point will be cut off, don't bother to make efforts, there will be danger.

It works! But the danger is too great. 4 impossible to reach the safety output of 1500W. Let's go!

There is a danger, not to mention that the dormitory will be poor if you change it without authorization, and there is a risk of electric shock leakage. Ask this, see if you're not an electrician, and you can't mess around.

As long as you are an electrician with professional ethics, you will not be taught to do this, so I advise you not to think about it.

For the sake of electricity safety, it is recommended not to mess around.

If more than 1,000 W is used in each dormitory, it will burn the line and cause a fire.

The preliminary analysis is to detect the power factor of the line to determine your load, and the power factor of the general electric furnace is 1

And TV,The power factor of the computer will not be 1,But left and right,If you want to use electricity,Then you can only add inductance to the circuit,You can hang a very large transformer on the socket and then you can use your heat fast。

Don't connect any ballasts in parallel, you don't know how many can be connected in parallel, it's easy to have a short circuit or something, it's too dangerous.

If it is dangerous, do not touch it with your hands to avoid electricity leakage.

Retrofitting is not advisable. Or communication to solve.

You'd better not do it. It's dangerous. Something went wrong. It's incredible.

Understand the working principle and structural characteristics in order to judge that there is a problem so as to further repair, I don't know how to repair anything, electrical appliances, and sometimes the risk of electric shock.

If you don't know how to work, you are blind.

This is the most basic requirement of a maintenance worker.

It is difficult to repair without coming.