The automatic machine three-phase is the switching device intended for protection of current network against short circuits and overloads. The device is used in three-phase networks of alternating and direct current. The standard type of the automatic machine consists of set of dilators which process of switching is based on change of frequency in chain.
Assignment of the three-phase automatic machine
The automatic machines of three-phase type (having three poles) are installed on actuating electric units of high power for ensuring connection and the emergency rupture of chain. They are intended for protection of current network against overcurrents. In networks with alternating current of the device are used along with rectifiers. Many modifications of automatic machines are capable to work with controllers. Powerful models are the most suitable for power plants.
Wire modifications of the device have stabilizer. Automatic machines are equipped with the triodes intended for signal transmission on the central block of the device. Regulators at different modifications are used one - and two-channel type. As protection of system insulators with facings are used. For increase in power of the three-phase automatic machine install special converters.
Connection of the three-phase automatic machine
The lead-in time cut-out of three-phase look is connected via the dynistor, the bidirectional trigger diode. Output pins of the device connect to the dilator, at the same time for stabilization of entrance signal the relay is used. Rated voltage on the device should not exceed 230 V.
Connection of the automatic machine to drive mechanisms is carried out only via the adapter with application of contactors of the inverting type. If the actuating unit of low power gets into gear, then in that case the relay is admissible to use on 120 V. The procedure of connection depends on specific model of the three-phase automatic machine and its performance data.
Characteristics of model of the three-phase PL6-C10/3 and PL6-C10/5 submachine gun
These three-phase automatic machines of PL6-C10 series are designed for 25 A and are suitable for chains with alternating current. The regulator in the switchboard of the version PL6-C10/3 is used single-channel type. Voltage output on contacts of the device reaches at most 300 V, and the power of automatic machines of this series is 2 kW. The conductivity of the resistor equals 3 mk.
At installation it is important to consider that the condenser is used to the specified modification only with the adapter. It is also necessary to note that this three-phase automatic machine is equipped with the varicap which is installed in the lower part of design. Thanks to this device the best stabilization of frequency is provided.
Characteristics of PL6-C10/5 model differ a little. The automatic machine via the relay with tension in 200 V is connected. Dilators in the device are used with capacitive filters. The device is equipped with the regulator of two-channel type and best of all is suitable for drive mechanisms with current on 3 A.
This modification has included tetrodes of low-impedance type. On facing the rate of resistance is 30 Ohms. The voltage operating voltage of the automatic machine does not exceed 120 V. Vazhno to consider that with alternating current this model of the three-phase automatic machine is not suitable for networks.
Characteristics of BA47-33 and VA47-35 model
Models of the introduction automatic machine of BA47 series possess high rate of input voltage. Tolerance level of overload of the relay is equal to 40 A. However actuating units should be connected only with unary adapters. Resistors at similar modifications are also installed low-impedance type. On dilators the parameter of resistance is equal 30 Ohms.
Thanks to such equipment of problem with frequency failures to automatic machines of this series are not terrible. For protection of the device the modulator with three condensers is installed. The transceiver is placed with BA47-33 model in upper part of design. The regulator of the same automatic machine is executed in two-channel option, and it is connected to contacts via the adapter. The varicap installed in the device is responsible for acceptance of signal with the maximum input voltage of 300 V.
However, connecting this model of the automatic machine, it should be taken into account that the system of protection against failures of the dynistor is not provided here. Contact drive mechanisms allow to connect the automatic machine via the relay on 240 V. Chastota of the device makes 55 Hz. At connection it is necessary to use insulators with filters, as a rule, are applied electrode type.
Characteristics of the automatic machine of modification of BA47-35 are suitable for the drives calculated on 30 A, the conductivity rate on the dilator will be not less than 3 mk. In this model two high-quality filters are used. Input resistance of this version of the automatic machine also equals 30 Ohms. The modulator - with two adapters, and resistors - operational type. And the indicator of overload of insulators cannot exceed 23 A.
At connection it is necessary to consider that the system of protection against pulse hindrances at this three-phase automatic machine is absent. The triode is installed in the device in the lower part of design, and contacts - under the closing mechanism. Change of position of resistors happens thanks to the transistor. The conductivity of the varicap corresponds 4 mk. The model only via the relay on 230 V, however the voltage output of the device not less than 300 V is connected. Protection against phase distortions at this version of the automatic machine is not provided.
Characteristics of modifications of Legrand 40 and 45
The three-phase automatic machine of these modifications is issued with two wire resistors with voltage stabilization and conductivity on the condenser no more than 3 mk. The automatic machine is suitable for drives on 40 A. The varicap installed in the device is used with linear filter.
At the Legrand 40 installation it is important to consider that at the automatic machine only one converter, and value of limit overload of the dilator no more than 3 And. Voltage output on contacts will be 250 V therefore the relay on 300 V is forbidden to be used. Protection against phase distortions at this automatic machine is not provided.
Parameters of the Legrand 45 model correspond to the regulator of single-channel type. The automatic machine is necessary for switching off of actuating units and is equipped with three condensers of good conductivity. Resistors in the device are placed behind contacts. For stabilization of voltage output the dilator and filters of linear type is used. At connection of the automatic machine it is allowed to use the relay on 200 V. Prich the converter at this modification is calculated on big overloads.
Characteristics of three-phase ABB 30 submachine gun
Automatic machines of the AVV series are made with three resistors. The rate of voltage output on condensers is 230 V. Vazhno to note that this model is allocated with low resistance, and the system of protection against pulse hindrances here in general is absent.
Condensers on the dilator of the automatic machine are installed capacitive type. There is special varicap protecting from problems with increase in tension. At connection of the device the relay only on 240 V and the triode of operational type has to be used. In total at this modification four linear filters are used. It should be noted that the automatic machine well is suitable for drives with admissible current intensity of 43 And.
The minimum rate of conductivity at the three-phase automatic machine of similar assignment is about 4 mk. It is necessary to consider that condensers in this option are located behind contacts. If it is required to execute connection with increase in voltage output, then in this case it is necessary to use only the operational dilator. In the device of this modification the modulator with two filters is used, and the tetrode is established magnetic type.