Please understand the electrician, please electrician?

After electric shock, mild people are frightened, palpitating, pale, dizzy, and fatigued. In severe cases, coma, tonic muscle contractions, shock, arrhythmias, very weak heartbeat and breathing, suspended animation, cardiac arrest, respiratory arrest, and cyanosis occur. 2.

Electrical burns, charring, or charring at the site of the shock**, and tissue necrosis. If you fall from a height, you may have brain**, head, chest, abdominal injuries or limb fractures. 3.

Complications include blindness or deafness, mental disorders, paralysis of limbs, trauma or fractures, and local secondary infections.

Diagnosis is based on 1Have a history of electric shock or lightning or electric shock. 2.

Mild electric shock is manifested as nervousness, paleness, sluggish expression, rapid breathing, heartbeat, and fatigue; In severe cases, coma, tonic muscle contractions, shock, arrhythmias, and very weak heartbeat and breathing are in a state of suspended animation. 3.Electrical burns, charring, or charring at the site of the shock, and tissue necrosis.

4.ECG may show myocardial damage, arrhythmias, and in severe cases, ventricular fibrillation and cardiac arrest.

Principle 1Quickly cut off the power supply, pull the power switch or use non-conductive materials such as wooden sticks and bamboo poles to separate the power supply from the patient. 2.

Artificial respiration is performed immediately, and if the heart stops, extracardiac or intracardiac compressions should be given immediately. and persevere until resuscitation or the appearance of corpse spots. 3.

Treat burns and trauma to prevent infection. 4.Correction of arrhythmias.

Medication Principles 1Mild cases are mainly oral diazepam. 2.

In cases of respiratory arrest, artificial respiration, oxygen administration, and intravenous infusion of coramine and lobeline are performed. Ventilators can be used to assist breathing when available. 3.

In arrhythmia cases, heteropulse, cediran, and arrhythmicity drugs can be selected according to the type. If medication** is ineffective, synchronous DC cardioversion can be applied. 4.

In cases of cardiac arrest, cardiac compressions are performed. In patients with ventricular fibrillation, defibrillation or pacing are performed. 5.

In cases where the limb is subjected to electrical and thermal burns, local edema caused by large soft tissue burns, and intravascular thrombosis of the small vegetative vessels, which can cause avascular necrosis of the distal limb, fascial release is required to reduce the pressure around the burn site and improve the blood circulation of the distal limb. 6.In cases of hyperkalemia, 10 calcium gluconate or 5 sodium bicarbonate can be given intravenously.

7.In cases of avascular necrosis of the limbs, antibiotics and support are used to treat the symptoms**, and the course of treatment is determined according to the condition.

Upstairs, what are you doing with all this nonsense! Yes is yes, no is no!

I have been electrocuted 3 times at work, and my whole body is numb. After that, it's fine! Alone has no effect on the hair!! ~

Summary. The socket with switch can basically achieve three functions, namely the switch control three-hole or five-hole socket; The switch has an outlet and a single control of one lamp; The socket has a switch and can be used to control the lights in two ways. The following household miscellaneous altar will introduce you to the wiring methods of the above three switches one by one.

The first wiring method socket has a switch, and the switch only controls the socket:

As shown in the figure above**, it is a three-pin socket with a switch, with a total of five binding posts, from left to right are the neutral wire N, the ground wire E, the jumper L1, the live wire L, and the jumper L2;

n is connected to the neutral line, e is connected to the ground wire, the jumper L1 and the jumper L2 are connected, and L is connected to the live wire;

Some switches have jumper wires that are connected inside the switch, so there is no need for additional wiring.

The second wiring method is the socket with a switch, and the switch is a single control lamp.

Please click Enter a description.

As shown in the picture above, there are live wire binding posts, neutral wire binding posts, ground wire binding posts are not drawn, and there are patch cord binding posts;

We only need to connect the neutral wire to the neutral wire binding post, the live wire is connected to the live wire binding post, and then the live wire is connected to the switch live wire binding post, and the switch appears to be connected to the lamp; The zero line of the lamp should be connected to the main zero line;

In this way, we can realize the normal use of the socket and the single control wiring of the switch to the lamp.

The third wiring method socket.

Ask an electrician god for an answer.

The socket with switch can basically achieve three functions, namely the switch control three-hole or five-hole socket; The switch has an outlet and a single control of one lamp; The socket has a switch and can be used to control the lights in two ways. The following household miscellaneous altar will introduce you to the wiring methods of the above three switches one by one. The first wiring method socket has a switch, and the switch only controls the socket:

As shown in the figure above**, it is a three-pin socket with a switch, with a total of five binding posts, from left to right are the neutral wire N, the ground wire E, the jumper L1, the live wire L, and the jumper L2; n is connected to the neutral line, e is connected to the ground wire, the jumper L1 and the jumper L2 are connected, and L is connected to the live wire; Some switches have jumper wires that are connected inside the switch, so there is no need for additional wiring. The second wiring method is the socket with a switch, and the switch single control lamp, please click to enter** description as shown in the figure above, there are live wire binding posts, neutral wire binding posts, ground wire binding posts are not drawn, and there are jumper binding posts; We only need to connect the neutral wire to the neutral wire binding post, the live wire is connected to the live wire binding post, and then the live wire is connected to the switch live wire binding post, and the switch appears to be connected to the lamp; The zero line of the lamp should be connected to the main zero line; In this way, we can realize the normal use of the socket and the single control wiring of the switch to the lamp. The third wiring method socket.

I want to connect a single-open and dual-control light switch to the original two-open seven-hole switch.

You can follow the instructions.

The battery of the battery car is generally a lead-acid battery, with a voltage of 2V and a capacity of 20Ah (ampere-hour).

The inverter converts the 48 volt voltage into 220 volts and drives the 1800 watt machine to work non-stop, and it can be calculated that the current at this time is:

i=\frac=

From this, it can be seen that after the four battery car inverters are turned into 220 volts, the maximum time that can be used is:

t=frac=hourt=hour.

Therefore, it is appropriate to use a 12-volt renter 20A battery, and if a long battery life is required, you need to choose a battery with a capacity greater than 20Ah (Ampere-hour).

Answer: It is appropriate to use a 12-volt 20-ampere battery, and if you require a long battery life, you need to choose a battery with a capacity greater than 20Ah (ampere-hour).

<> This is a four-open dual-control switch, ** in the red line for one point, respectively, two open and double control. Judging from the wiring, it should be used for the dual control connection on the opposite wall.

It is a dual-control switch. These are 4 small switches, and if each switch is connected with 3 wires, it means that there is a switch control somewhere else. It should be two switches controlling one light.

Dual-control switches, it should be two switches to control one light.

Rated power; 50%-100%;b;a;b;x;x;x;x;v;

Repeated Grounding: In a system where the neutral point is directly grounded, the grounding device is connected with a metal wire at one or more points of the zero trunk.

Working Grounding: In TN-C systems and TN-C-S systems, grounding is used to ensure that the circuit or equipment meets the requirements for operation.

Protective grounding: Grounding to prevent the metal shell of electrical installations, the frame of power distribution devices, and line towers from being energized and endangering the safety of people and equipment.

In AC circuits, the cosine of the phase difference ( ) between voltage and current is called the power factor.

By improving the power factor, the total current in the line and the capacity of the electrical components in the power supply system, such as transformers, electrical equipment, wires, etc., are reduced, so it not only reduces the investment cost, but also reduces the loss of its own electric energy; By ensuring good power factor, the voltage loss in the power supply system can be reduced, the load voltage can be more stable, and the quality of power can be improved. It can increase the margin of the system and tap the potential of power generation and power supply equipment.

i=(100*22+(40*20/;is the power factor of the fluorescent lamp.

Fuse wire selection 20a

The last problem, as with single-phase full-bridge rectification, is just two more diodes in the other phase, one for the positive and one for the negative.

This is normal, I, as a person who has used batteries, I tell you, absolutely normal.

First of all, you have to figure out the meaning of the two lights, that is, the battery car is charged with a red light to turn green, and there is a red light that has not read the manual, it should be the working indicator of the charger to represent that the power can work, and the fan behind it should prevent the charger from overheating and damaging the electronic components. Now the fan stops working, and the charging can still be charged normally, but the charging time is easy to cause the charger to heat up, and the charger will be damaged, and the fire will spontaneously combustion.

It's time to check the line. The light bulb is on, and it only means that the line connecting the light bulb is normal and fault-free. In other aspects, especially the mechanical part, it is better to find electric vehicle repair personnel.

Why not buy a new one. It's worth repairing.。。

The calculation is as follows: according to the formula (sqrt means square):

When the load is connected in series only by inductance and resistance, phase impedance = sqrt [(2 frequency inductance) (2 inductance) + resistance resistance] = sqrt [(2 50 ohms.

1. Star connection:

Formula: Line current Phase current Phase voltage Phase impedance 380 sqrt(3) amps when the star connection is load balanced.

2. Triangular jointing.

Formula: When the triangle is load balanced, the line current phase current sqrt(3) phase current line voltage phase impedance 380 amps.

Line current Phase current sqrt(3) amps.