Three-phase switch: types of products, connection diagrams to various networks

Some residential buildings have occasional power problems. To solve them, a generator is often used. The generated electricity is distributed by the consumer. To switch the supply network to the generator, a three-phase switch is installed in the switchboard. Products differ in technical characteristics and parameters. They are in demand in residential buildings, the installation scheme is directly proportional to the type of power grid.

Variety of devices

The most common type of flip-flop products are single-module switches. They are often equipped with copper conductors. It should be borne in mind that such units are best used for generators with operating indicators no more than 20 Hz. However, there are certain disadvantages that should not be neglected when choosing.

It should be noted that during the operation of single-pole products, the maximum load on them can be no more than 200 Amperes. Therefore, it is better to refuse installation in residential premises where a lot of electricity is consumed. In addition, they have a low output voltage of 200 V.

Often used today cross-over deviceshaving two poles. Most often they are mounted in residential premises. The switches can function both in single-phase and two-phase networks. The average negative differential resistance reading is 60 ohms.

Output voltage ratings may vary. The modification of the product depends on this.

Currently, PP20 series instruments equipped with open capacitors are mainly used. The connection system provides for the presence of a 300 V power supply unit.

Connection diagrams

The process of connecting products may differ depending on the type of electrical network. You can connect the device to a single-phase network if the switch is two-pole. In addition, it must be borne in mind that the products operate in the presence of a power supply.

There are a number of features:

• The negative differential resistance in such modifications will be approximately 50 ohms. Switch switches are sometimes equipped with counters, but switches are rarely found in these units.
• When choosing jumpers, preference should be given to copper parts.
• Before installing products in residential premises, you need to make sure that they have KK202 series shields, etc. It is not recommended to use reversible units for single-phase networks due to inconsistencies in characteristics.

Two-phase network

When connecting a transition switch to a two-phase network, it is necessary to provide for the presence of a power supply unit with indicators of 200 W as a connection element. Please note that for such units only expansion switches must be used. In this case, the products will operate in two-phase networks, regardless of the number of modules.

The maximum allowable voltage is 300 V. In this case, the switches will be subject to a load of 20 Amperes. Often they stop at the PP30 models. Some features:

• The devices have two modules that are able to provide an output voltage of 350 V.
• The design of the bollards may vary. Residential buildings must have an electrical panel. Blocks are often equipped with thyristors.
• The maximum countermeasures are 40 ohms. These units use closed contact systems. Electrical oscillations are controlled by capacitors.
• The reversing unit maintains the required current frequency indicators. If different models are selected, a controller must be present to minimize the negative effects of harmonic distortion.

Three-phase circuit

In cases where a circuit breaker is installed in a three-phase network, supply units with a voltage of 400 V must be used. In addition, pulse transformers can be used for such circuits. The device is connected using the inverting input. The current exits through feed-through capacitors that function as a special device. In this case, it makes sense to use modular switches.

There are also single-module products on sale. Their distinguishing feature is the minimum voltage values ​​- 350 V. In this case, the resistance is 55 ohms. To solve this problem, there must be a blocker in the switch.

It is necessary that the residential building be equipped with electrical panels of the KK22 series. Control systems should be equipped not only with thyristors, but also with dinistors.

Types of switches for generators

When choosing products for generators, it is best to give preference to single-module switches. If we are talking about a blocker, then it must be equipped with a classic contact system. In the device of reversing units, a controller is often present. That is why one should not stop choosing systems with a resonator.

In such situations, the threshold frequency will be high. Products used for generators may vary in size. It is important to pay special attention to number of capacitors.

Before installing generator products, you must carefully study the grounding system. Full functioning of the device is possible in the presence of a ground electrode. The marking of the latter must necessarily contain information about the protection system, in most cases it is IP30. Guided by this information, one can safely judge the reliable isolation of the device. Such a system will function for many cycles.

Two-way systems

When buying changeover switches, it is important to consider the fact that they can only be used in single-phase circuits. The design must have two feed-through capacitors. Manufacturers produce not only two-, but also three-module systems. They can work with a 300 V power supply. The connection diagram of such a device often involves the use of a counter. Installation is carried out using copper jumpers. The operation of the units is possible in combination with expansion switches.

It should be noted that the devices can function with any electrical panels.

Rocker switches are designed for a voltage of 350 V, the load may vary. The determining factor is the manufacturer. The average load is 30 A.

Three-way modifications

If we consider in detail such rocker switches, it is important to note that they are equipped only with expansion switches. This is the most successful option for use in two-phase circuits.

Products on an industrial scale are in wide demand. Their functioning at the enterprise is possible in case of connection to the KK202 series electrical panel.

Often, the jumpers are made of copper, the bollards may differ in design. A feature of the products is high sensitivity limit. In addition, they are equipped with a reliable protective system. Insulation comes in different classes. The determining factor when choosing is the manufacturer.

So, products of the SFT 250A series are installed exclusively in combination with power supplies with a voltage of 200 and 300 V. The connection diagram of such devices provides for the use of feed-through capacitors. This is necessary so that the load is no more than 3 Amperes. Systems often work with analog switches. In addition, units made in an expansion version are common.

These products can be used in residential buildings. It is important to make sure that the system is equipped with a thyristor base before purchasing.

. When connecting meters, they need to allocate a special place behind the contact system. Reverse units must be equipped with a resonator and controller. The choice must be made taking into account the value of the peak frequency of the product.

Generator switches are an effective solution and provide many benefits. In addition to convenient maintenance, it is possible to monitor the characteristics of the network. This minimizes the risk of dangerous situations affecting the functioning of the devices connected to the network. When choosing devices, you need to pay special attention to the parameters of the elements included in the kit, as well as the room where the installation is planned.