How to wire the DW 82 AC power meter?

Add an intermediate relay JDZ1 4-4, DW15 add an undervoltage coil, add a manual control, automatic control knob LA38-11 intermediate relay power supply with the first incoming end, series control knob normally open point, the first circuit breaker closing loop parallel intermediate relay normally open contact, the second circuit breaker closing loop parallel intermediate relay normally closed contact, open circuit circuit parallel intermediate relay normally open contact, open circuit parallel intermediate relay normally open contact two circuit breaker control power supply are connected in series to the normally closed contact of another circuit breaker, Ensure that the two circuit breakers can only be closed permanently once, including manual and not Wucheng electrical design ideas: use the conventional electrical interlock principle of two in one contact, and make a slight change to the control principle: when the manual automatic control knob turns, the automatic control takes effect.

After the first incoming end is energized normally, the intermediate relay is closed, the second circuit breaker opening circuit is turned on, and the circuit breaker is opened. The first circuit breaker controls the power supply to be turned on, the closing circuit is turned on, and the first circuit breaker is automatically closed. When the first incoming line is powered off, the first circuit breaker undervoltage tripper acts, the circuit breaker is opened, the intermediate relay coil is powered off and tripped, the second circuit breaker closing circuit is turned on, and the second circuit breaker is closed The actual operation is disadvantages:

Because the DW15 circuit breaker does not have fault contacts, in the case of short circuit and overload tripping, the short circuit breaker may automatically reclose, quite a dangerous solution: the use of thermal relay to protect the secondary current method, in the automatic control loop to add a group of thermal relay normally closed contacts, when the line is overloaded or short circuit, the current transformer current rises, the thermal relay trips through the setting current overload, and the automatic control loop fails. Both incoming wires should be added with secondary current thermal relay protection Note:

The methods of automatic reclosing are very simple, and there are many, and the reason why they are rarely used in related power distribution projects is because there are major safety risks.

There are 4 terminal blocks on the power meter. 2 voltages, 2 currents. And the voltage terminal has a * end, and the current also has *. As long as the voltage is against the voltage, and the current is connected to the current.

The wiring of this AC power can be wired normally as long as it is connected to the home circuit, and it is a member of the positive and negative machine level.

Watt-hour meters; It is divided into two wiring methods;

1. a shun-in type; 1 into the fire, 2 out of the fire, 3 in zero, 4 out of zero.

2. a jump-in type; 1 into the fire, 2 into zero, 3 out of the fire, 4 out of zero.

In general, there is a wiring diagram on the shell at the wiring of the meter, look at the wiring diagram, and connect it.

Electrician knowledge: meter wiring method. The wiring formula, you will be connected when you see it, and it is very worth collecting.

1) The connection method of single-phase electricity meter.

1. Direct access method.

If the power of the meter is within its allowable range, then the direct access method can be used to connect the meter. Specific connection: the single-phase watt-hour meter has a total of four terminals, from left to right by number, there are generally two kinds of wiring, generally connected to the incoming line and outgoing wire; The other is to press the incoming line to connect the outgoing line.

However, regardless of the connection method, the phase wire (live wire) must be connected to the terminal of the current coil of the meter. Due to the special wiring of some meters, the specific wiring method needs to refer to the wiring diagram on the terminal block to connect.

2. Access method through transformer.

In addition to the direct access method, there is also a connection method for single-phase meters, that is, through the transformer access method. There are two specific connection methods: the connection method when the 5th and 1st ends of the single-phase watt-hour meter are not disconnected.

Since the short connector in the table is not disconnected, the K2 terminal of the transformer is forbidden to be grounded. How to connect when the short tabs at the 5th and 1st ends of the single-phase watt-hour meter are disconnected. Since the short tab in the table is disconnected, the K2 terminal of the transformer should be grounded.

At the same time, the voltage coils should be connected to both ends of the power supply.

2) The connection method of three-phase four-wire meter.

1. Direct access method.

If the power of the meter is within its allowable range, then the direct access method can be used to connect the meter. The specific connection method can refer to the direct access method of the above single-phase meter.

Either the terminal head is connected to the meter from the positive and negative poles to the positive pole.

When the three-phase alternator supplies power to the outside, the ends of the three groups of coils X, Y and Z are connected together, a wire is drawn from the connection point, and then a wire is drawn out from the other end of the coil winding A, B and C, these three wires are called phase wires or live wires, and this connection method is called star connection method.

In each phase stator winding of a three-phase asynchronous motor, a pulsating magnetic field is generated in each phase stator winding when a sinusoidal alternating current flows through it.

Due to the spatial position of the three-phase winding in the iron core is 120° different from each other, the three-phase alternating current flows through the winding, and the current of each phase is 120° different from each other in time, so that the total magnetic field synthesized by the three pulsating magnetic fields generated by them at the same time becomes a rotating magnetic field.

Three-phase alternating current rotating magnetic field.

In each phase stator winding of a three-phase asynchronous motor, a pulsating magnetic field is generated in each phase stator winding when a sinusoidal alternating current flows through it. Due to the spatial position of the three-phase winding in the iron core is 120° different from each other, the three-phase alternating current flows through the winding, and the current of each phase is 120° different from each other in time, so that the total magnetic field synthesized by the three pulsating magnetic fields generated by them at the same time becomes a rotating magnetic field.

The common three-phase four-wire active energy meter models are DT1, DT2, DT10, DT864, etc., and their common feature is that there are 3 drive elements of the same specification.

When the three-phase alternator supplies power to the outside, the ends of the three groups of coils X, Y, and Z are connected together, and a line is drawn from the connection point, which is called the neutral line, also called the neutral wire. Then from the other end of the coil winding A, B, C each lead out a line, these three lines are called phase wire or live wire, this connection method is called star connection method.

The power meter is connected to the secondary lead line from the current transformer.

1. There are two wiring methods for the installation of three-phase watt-hour meters. One is to use a circuit transformer to connect with the watt-hour meter. The other is a direct wiring intake meter.

2. Here is an explanation about direct wiring. The first thing to do is to buy a direct wiring watt-hour meter.

3. Install a screw on the wall or on the installation screw post of the watt-hour meter. Then open the wiring cover of the watt-hour meter. Generally, there is an installation wiring diagram on the back of the cover. , 4, 7 is the power incoming line. There is no need to distinguish the ABC three-phase here, but it must be 3 live wires, that is, 3 phase wires.

5. Then install the 3 phase wires in the wiring hole. Be careful to make good contact, that is, tighten the 2 screws.

6. Then connect the line again. If the outgoing wire is a multi-strand copper wire, it must be twisted into a single wire and there can be no forked wire.

7. Finally, connect the zero line to the zero line of the watt-hour meter.

1. In order to adapt to the use of smart grid and new energy, smart meters also have two-way multi-rate metering functions, user-end control functions, two-way data communication functions of multiple data transmission modes, anti-theft functions and other intelligent functions.

2. For the wiring method of its control line, the wiring method of the general domestic single-phase electric energy meter, regardless of its model, if there is no special orderer, the wiring method is the same.

3. The specific wiring method of the single-phase smart electric energy meter is to open the junction box cover, and you can see four large terminals.

4. These four terminals are easy to find, because other terminals such as centralized reading interface, pulse output, communication interface and so on are very small.

5. From left to right, press 1, 2, 3, 4 to number, then the general wiring method is 1, 3 incoming; 2,4 out of line.

I haven't used the model you mentioned, but the basic approach is that you only recognize the 4 largest holes. (Other small holes, it is indeed a variety of signal wires, you can ignore him).

The installation method of the 4 large holes is:

1 connection to the incoming line of the live wire, 2 connected to the outgoing line of the live wire, 3 connected to the incoming line of the zero line, 4 connected to the outgoing line of the zero line, after the installation, turn on the load larger, the small light on the meter, should be flashing

As shown in Figure 1, the incoming line of the live wire, 2, the outgoing line of the live wire, 3, the incoming line of the zero line, 4, the outgoing line of the zero line, 5 and 6 are connected to the pulse, you can read the meter remotely, you don't have to worry about this, it is connected by the power supply bureau itself.

You'd better find a professional electrician!

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(1) Wiring method of single-phase AC watt-hour meter. Most of the measurement of alternating current energy is based on inductive watt-hour meters. Single-phase watt-hour meters have special junction boxes.

There are 4 end buttons in the junction box. The voltage and current coils are connected in the junction box at the factory when the meter is shipped. There are a total of 4 wiring piles for single-phase watt-hour meters, from left to right by numbering, when wiring, only need to press L, 3 to terminate the power supply to terminate the load (a few also have L, 2 to terminate the power supply to terminate the load, refer to the wiring diagram of the meter when wiring).

If the load current is very high or the voltage is very high, the current or voltage transformer should be used to access the circuit. The wiring should be connected in series with the load at the primary level of the current transformer, and in parallel with the voltage coil of the current transformer.

2) Wiring method of three-phase watt-hour meter. The three-phase watt-hour meter is based on the principle of measuring power by the two-meter method, and is composed of two single-phase watt-hour meters. The wiring method of the three-phase watt-hour meter is slightly different according to the different three-phase power cord system.

For the direct three-phase three-wire watt-hour meter, a total of 8 terminal piles from left to right can be left empty; For the direct three-phase four-wire watt-hour meter, from left to right, there are a total of 11 wiring piles for A, B, C three-phase incoming line, 10 for the neutral wire incoming line, 3 phase wires outlet, 11 for the neutral line outgoing line can be empty. For large-load circuits, indirect three-phase watt-hour meters must be used, and 2 or 3 current transformers of the same specification are required for wiring.

Generally, there is a wiring diagram on the wiring cover.

Single-phase tables are easy to get in and out. There are four wire holes under the single-phase table: 1 hole is the inlet line, 2 holes are the inlet zero line, 3 holes are the outgoing fire line, and 4 holes are the outgoing zero line.

The incoming line is pulled by the superior power supply, such as the one connected from the outgoing line of the distribution transformer. The outgoing line is to the load side, that is, to the home. The wiring is to connect the neutral wire first, and then connect the live wire.

The electric energy meter is a meter used to measure electrical energy, also known as the watt-hour meter, fire meter, and kilowatt-hour meter, which refers to the instrument for measuring various electrical quantities.

By use: active energy meter, reactive energy meter, maximum demand meter, standard energy meter, complex rate time-of-use energy meter, prepaid energy meter (coin-operated type, magnetic card type, electric card type), loss energy meter, multi-function energy meter and smart energy meter.

According to the working principle: inductive (mechanical), static (electronic), electromechanical (hybrid) according to the nature of the connected power supply: AC meter, DC meter.

According to the structure: monolithic, split.

According to the access phase wire: single-phase, three-phase three-wire, three-phase four-wire electric energy meter according to the accuracy level: ordinary installed electric energy meter (level) and portable precision electric energy meter (level) according to the installation and wiring mode: direct access type, indirect access type.

What should I do if a novice electrician can't connect the meter? The old electrician will teach you step by step, practical electrician technology!

Looking at the picture, the 3rd and 4th are connected together, and the 4th and 3 are the same.

The wiring of the single-phase meter is as follows: The wiring of the three-phase meter is as follows: if the current transformer is not needed, cancel the wiring of the single-phase meter and divide the three phases.

1. Direct type. (small current).

2. Transformer type. (High current).

3. There is a wiring diagram on the back of the cover plate of the electric energy meter.

Connection: from left to right, the leftmost connected live wire, the live wire connected by an interface, and then the zero line connected in; The last one, the one on the far right, takes out the zero line. A single-phase meter is one live wire and one neutral wire, i.e. a household electricity meter, with four interfaces.

Electricity meter, the abbreviation of electric energy meter, is used to measure electrical energy, also known as watt-hour meter, fire meter, electric energy meter, kilowatt-hour meter, refers to the measurement of various electrical instruments.

There are four ways to view the meter:

First, the general straight-forward single-phase meter and three-phase meter can directly read the number minus the last reading to be the amount of electricity at this stage. The incoming wire of the straight-forward meter is thicker, and it is not connected by the transformer if you look closely.

The second kind, the three-phase meter is connected by the current transformer connection, the wiring of the meter has 10 wirings, the current ratio of the connected current transformer should be observed, the name plate of the current transformer is marked, all of them are marked with a number ratio of 5, such as 100 5150 5, etc., the number read on the meter is multiplied by the current ratio is the amount of electricity measured, and the accurate loss and line loss are added.

Third, the single-phase meter measures the amount of electricity of three-phase electricity, and the electricity reading method is to read the number on the meter multiplied by 3 in the way of direct connection to the meter, and if the meter connected by the transformer is to read the meter number multiplied by the current multiple of the transformer and then multiplied by 3

Fourth, the smart meter has only one LCD screen, and if it is a single phase, it will directly display the total power and remaining power, and you can read it directly. If it is an IC card meter, only the light emitting tube display is a single graphics card meter. There will be a small red dot on the top of the meter, and the red dot will jump to the total usage is the total use, and jump to the remaining is the surplus.

Classification of commonly used energy meters:

1) The electric energy meter can be divided into DC electric energy meter and alternating current electric energy meter according to the circuit it uses. AC energy meters can be divided into single-phase energy meters, three-phase three-wire energy meters and three-phase four-wire energy meters according to their phase lines.

2) The electric energy meter can be divided into electrical and mechanical electric energy meter and electronic electric energy meter (also known as static electric energy meter and solid-state electric energy meter) according to its working principle. Electromechanical energy meters are used in AC circuits as ordinary energy measurement instruments, the most commonly used of which is inductive energy meters. Electronic energy meters can be divided into fully electronic energy meters and electromechanical energy meters.

3) The electric energy meter can be divided into integral electric energy meter and split electric energy meter according to its structure.

4) The electric energy meter can be divided into active energy meter, reactive energy meter, maximum demand meter, standard electric energy meter, multi-rate time-of-use electric energy meter, prepaid electric energy meter, loss electric energy meter and multi-functional electric energy meter according to its use.

5) The electric energy meter can be divided into ordinary installed electric energy meter (grade) and portable precision electric energy meter (grade) according to its accuracy level.