Single-phase electricity meter connection scheme

Many apartments have single-phase meters. By design, the models are quite different. First of all, it should be noted that devices are produced for 2-4 terminals. Counters can be connected to the network through various devices. In this case, you need to take into account the features of the shield, as well as the modification mark. In order to understand this question in more detail, it is necessary to consider specific schemes.

Two-tariff modifications

The connection scheme for a two-rate single-phase meter assumes the use of a relay with a current conductivity of 6.5 microns. In this case, the rectifier is connected directly to the terminals. Directly a dynistor is used of the expansion type. In many respects it helps to cope with congestion in the network.

If we consider modifications of 10 A, then the transistor is applied only to the broadband type. Insulators are installed with winding. If we consider the counters at 20 A, then in this situation we need an open type transistor.

Three-tariff counters

The connection circuit of this type of counter includes field effect transistors. The relay is used as standard at 6.5 microns. First of all, terminals are wired for connecting the device. Then, a high current conductance diode is selected. If we consider a standard counter of 15 A, then the stabilizer can be omitted. Particular attention when connecting the model is important to give insulators. The output contacts of the transistor must be closed.

Diagram of models for two terminals

Schemes connecting the meter to two terminals implies the use of a high-conductivity relay. In order to deal with the congestion in the network, use various dynistors. The most common today is considered to be expansion devices. They are found on the market with insulators and without them. If we consider a modification of 10 A, then the transistor is better to use a single-pole type. The modification is connected directly via a rectifier, which is connected to the relay.

If we talk about the counters at 20 A, then in this case we can not do without a semiconductor thyristor. First of all, this allows solving the problem of relay overheating. It is also used to improve the accuracy of the counter. Still on the market, modifications are available for 25 A. For connecting devices, open type transistors are used. The conductivity of the relay must be at least 7 microns. In this case, the dynistor is of the expansion type. To combat electromagnetic interference, rectifiers are used.

Connecting devices to three terminals

The circuit of connection of the counter to three terminals includes two rectifiers. The relay is used in this case with low conductivity. This improves the accuracy of the instrument measurements. The expander is installed on the transistor. For this, output contacts are used. If we consider modifications at 15 A, then the dynistor is of the expansive type. In this case, the relay is applied at 4 microns. If we talk about the counters at 20 A, then the expander can be set to an open type. However, the relay will be needed at 6 microns.

Four-terminal counters

The connection diagram of the electric meter (single-phase) implies the use of expansion dinistors. Directly the transistor is applied open type. The conductivity parameter must be at least 6.5 microns. If we talk about the counters at 5 A, then in this situation we can not do without a qualitative rectifier. However, first of all the transistor is attached. If we talk about the counters at 10 A, then the dynistor can be used without insulators. The relay is connected via output contacts.

Connecting the meter "Mercury"

The connection scheme of the single-phase counter "Mercury" includes a dynistor of the expansion type. To deal with overloads in the network are installed not only transistors, but also stabilizers. In this case, the expander is used with a winding. To fix the relay, clamps are used. The conductivity parameter must be at least 4.5 microns. To ensure that electromagnetic interference does not affect the accuracy of measurements, insulators are used.

Model ACE 2000

The circuit of connection of a single-phase electronic counter ACE 2000 contains an expansion diynistor. The main problem of modification is considered to be a high output overload parameter. In this regard, the accuracy of the meter is not very high.

In order to improve the parameters of the model, open-type rectifiers are used. To fix an element on the panel, conductors are used. Transistors for connection can be taken single-pole or bipolar type.

Model NIK 2102

The connection diagram of the electricity meter (single-phase) NIK 2102 implies the use of a relay at 4 microns. Dinistor is most often selected by an open type. The output overload indicator in this case is equal to 10 A. The expander according to the scheme is attached to the relay. A transistor is allowed to use a single-pole type. The stabilizer for connection of the counter is not required. The security system is secure.

Model ME172

The circuit for connecting a single-phase meter of this brand contains various transistors. If we consider a variant with a single-pole modification, then the relay is applied at 3 microns. In this case, the dynistor will need an expansion type. In this case, the output voltage parameter will lie in the region of 10 A. Also consider the circuit with a bipolar transistor. In this case, a dinistor will need an analog type. The rectifier is installed directly behind the transistor. The relay is used in the network at 6 microns. The output overload indicator does not exceed 15 A.

Model MTX1A10

The circuit for connecting a single-phase meter contains a single-pole transistor. The relay behind it is set to 3.5 microns. Directly the stabilizer is installed with insulators. The relay is connected to the shield via the output contacts. Also, the meter can be connected via bipolar transistors. The stabilizer is not used in this case. Dinistor for the relay is selected open type. The conductivity of the current is on average 6.5 microns.

Model ED 2500

The circuit for connecting a single-phase meter assumes the use of a relay at 3.3 microns. In this case, the transistor is of an open type. In some cases, stabilizers are used. It is also important to note that it is allowed to install single-pole transistors. In this case, the dynistor is of the expansion type. The conductivity parameter of the current averaged 5.6 microns. Typically, the threshold overload is not more than 15 A. If we talk about bipolar transistors, then they are used very rarely. In this case, the problem most often is to reduce the accuracy of the measurements.

Model ACE 300

The scheme for connecting a single-phase counter of this type implies the use of a relay at 3 microns. Directly, the transistor is of the single-pole type. Dinistor is most often used with insulators. In some cases, a linear-type stabilizer is installed.

However, it should be noted that it is quite expensive on the market. If we consider circuits with bipolar transistors, then in this case the dynistor is set to an open type. Directly the relay for the counter is selected at 7 microns. In this case, the output overload indicator is in the region of 20 A.