What does compensation capacitor binding post paint mean?

Electric car compensation capacitor, he has the capacity he charges and discharges, he stores the charge without wiring the paint so that he will not touch the line of his current is very large (without saving the charge for a long time and activating his more troublesome he did this, understand?) ）

The paint on the connecting shaft of the compensation capacitor is on top of the capacitor, which can be coated with a layer of paint to prevent leakage and also prevent friction.

Capacitance, also known as "capacitance", refers to the storage of free charge at a given potential difference, denoted as c, and the SI unit is farad (f). Generally speaking, the charge will move under force in the electric field, and when there is a medium between the conductors, it hinders the movement of the charge and makes the charge accumulate on the conductor, resulting in the accumulation and storage of charge, and the amount of stored charge is called capacitance.

Capacitance refers to the ability to hold an electric charge. Any electrostatic field is made up of many capacitors, and where there is an electrostatic field, there is a capacitance, and the capacitance is described in terms of an electrostatic field. It is generally believed that

An isolated conductor forms a capacitance with infinity, and the conductor is grounded to the infinity and connected to the earth as a whole.

Capacitance (or capacitance) is a physical quantity that expresses a capacitor's ability to hold an electric charge. Capacitance from the physical point of view, it is a static charge storage medium, may be permanent charge, this is its characteristic, it is widely used, it is an indispensable electronic component in the field of electronics and electricity. It is mainly used in power supply filtering, signal filtering, signal coupling, resonance, filtering, compensation, charge and discharge, energy storage, DC isolation and other circuits.

Four binding posts, there may be two capacitors (there is this on the washing machine, it is two starting capacitors of different sizes), the general capacitors are identified, the two pins are marked with how large the capacity is, and there is a three-pronged capacitor with two different capacities.

The air-conditioned ones are also four-legged. I just saw it yesterday, and two feet will do.

There is no **, and the general power drawings are single-phase

When the three-phase capacitor is connected internally, there are only three outlets, and there are four outlets when the internal star is connected, that is, the lead n, if you don't need phase compensation, you can directly choose three outlets.

In the 31 years that our company has been engaged in the R&D, production and sales of reactive power compensation equipment, customers often ask similar questions. In this way: I haven't seen your drawings, I can't talk nonsense, according to experience, provide a little advice for your reference:

In general, capacitors are labeled as (20+20), which means that there are two capacitors, each with a capacity of 20 kvar. Note that kvar, the capacity unit of capacitor seven, is used in power systems, and it is a value at a specific operating voltage and operating frequency. For the same capacitor, if the operating voltage, operating frequency and other parameters change, the corresponding kvar value is also different.

This is different from using "farad" or "micro-method" in physics.

Say a few more words: because the technology of the conventional compensation cabinet is very mature, and the components used in the cabinet are also very mature, so a large number of small factories and even small roadside electrical appliances stores dare to make compensation cabinets, which is a very fatal thing, because the technology of the industry is mature, does not mean that the producer's process and technology are mature, and does not mean that the producer does not use fake and inferior components and materials, especially a large number of low-cost cottage compensation controllers flood the market, ** looks very attractive, but a fine is enough for you to bear.

Eliminating harmonics, improving the power factor, and doing detuning and reactive power compensation are energy-saving technologies advocated by the state, but they are highly professional and need professionals to do them. More about reactive power compensation, power factor and so on, you can four core me, you can also come here to find and discuss, here is a group of retired electrician old men who have studied in college, can't do much, but are happy to help young people.

It's not power compensation, it's capacitance compensation.

Capacitance compensation is either reactive power compensation or power factor compensation. The electrical equipment of the power system will produce reactive power when used, and it is usually inductive, which will reduce the capacity use efficiency of the power supply, which can be improved by increasing the capacitance appropriately in the system. Power capacitance compensation is also known as power factor compensation (a combination of voltage compensation, current compensation, and phase compensation).

Generally speaking, the low-voltage capacitance compensation cabinet is composed of cabinet shells, busbars, circuit breakers, isolation switches, thermal relays, contactors, lightning arresters, capacitors, reactors, primary and secondary wires, terminal strips, power factor automatic compensation control devices, disk instruments, etc.

The existence of nonlinear components (harmonics) in the load will cause other high-frequency (higher harmonic) currents to flow through the capacitor circuit in addition to the power frequency fundamental current, which will cause the capacitor to be damaged by overvoltage, overcurrent, overcapacitance, overtemperature, etc., or the capacitor bank cannot be put into operation;

For this occasion, in addition to the special "filter capacitor" can be used to increase its own resistance (** higher); It can also be composed of a filter loop by selecting a suitable reactor to filter out a strong higher harmonic; Choosing a capacitor with a higher rated voltage is also one of the ways to reduce harmonic accidents.

The reactive power compensation mode commonly used in the power grid includes: centralized compensation mode, decentralized local compensation mode and single machine local compensation mode.

Tips: When the power grid is running, the reactive power supplied by the power supply is used to establish and maintain the magnetic field in the electrical equipment, and carry out the exchange of energy, which creates the necessary conditions for the transmission and conversion of energy. Without it, the transformer cannot transform and transmit electrical energy, without it, the rotating magnetic field of the motor cannot be established, and the motor rotates.

Since the reactive power does not directly do the actual work consumed, it only completes the mutual conversion of electromagnetic energy, reflecting the scale of energy exchange between the inductor, capacitor and power supply in the AC current circuit, so it does not consume fuel or water energy.

In the power system, such as transformers, motors and many other equipment that need to be excited when working, they need to absorb inductive reactive power from the power system to excite work, and the transmission line has a distributed capacitance, which will produce capacitive reactive power under voltage, that is to say, the line should absorb inductive reactive power. In the power system, the generator is the only active power source, and it is also the basic reactive power source. If we only rely on the generator to provide reactive power, the power system will cause voltage loss and power loss in power generation, transmission and power supply and distribution equipment due to the continuous exchange of reactive power, and all the power emitted by the generator is equal to the vector sum of active power and reactive power, when the reactive power provided is more, the active power provided is less, and this mode of operation is also very uneconomical.

If the system will run in this way, because the inductive reactive load such as various transformers and motors is too far away from the generator, the reactive power will continue to flow back and forth between these points, which will lead to an increase in line loss, and at this time, it will also increase the capacity of generators, transformers and other electrical equipment and wires, and will also increase the specifications of user selection control and measurement. What's more, under the above operation mode, the reactive power provided is very limited, and for the entire power system, the demand for reactive power is very large. Therefore, reactive power compensation is required.

It consists of two parts; One is active power; The second is reactive power. Directly consume electrical energy, convert electrical energy into mechanical energy, thermal energy, chemical energy or sound energy, and use these energy to do work, this part of the power is called active power; Does not consume electrical energy; It is just to convert the electrical energy into another form of energy, which is a necessary condition for the electrical equipment to be able to do work, and this energy is periodically converted with electric energy in the power grid, and this part of the power is called reactive power, such as the electrical energy occupied by the electromagnetic component to establish the magnetic field, and the electric energy occupied by the capacitor to establish the electric field. When the current is working in the inductive element, the current is ahead of the voltage 90

And when the current is working in the capacitive element, the current lags with a voltage of 90In the same circuit, the inductor current and the capacitor current are in the opposite direction, with a difference of 180If the capacitive element is installed proportionally in the electromagnetic component circuit, the current of the two cancels each other, and the angle between the current vector and the voltage vector is reduced, so as to improve the ability of electric energy to do work, which is the principle of reactive power compensation.

Among them, the power compensation is mainly to compensate the reactive part, which can be compensated by capacitors, and the local compensation can be taken in places far away from the electrical equipment.

Capacitors are generally triangular in the following figure.

1 is the discharge resistance, 2 is the normally closed contact of the capacitive contactor, and 3 is the normally open contact of the capacitive contactor.

There are 6 wires on the capacitor, which I haven't seen yet, and you can connect the capacitor yourself into a triangle, or a star.

The three-legged capacitor connection method of the air conditioning compressor: the 2 legs are marked with the letter fan for the external fan (red line); 3 legs are marked with the letter C to connect to the compressor (red line); The 4 legs are marked with a herm connection to the common end neutral line (blue line). The letter C is the compressor, which is connected to the red line of the compressor; fan is an external fan, which is generally connected to the red line of the fan; Herm is the common end, which is the neutral line N, connected to the blue line; The compressor is connected to C and Herm.

Some capacitors will have four pins or three pins, but two of them are drawn from the same end, when plugging the capacitor, just make sure that the compressor capacitor wiring is connected to both ends of the capacitor.

I'm going to buy one and hang up

The capacitor you mentioned has four binding posts, three of which are the same binding posts for A, B, and C phases, and the other for N wires. This capacitor should be used for split-phase compensation. Hope it helps.