Transformers are electromagneticdevices. Their main task is the conversion of direct current. This process is carried out using electromagnetic induction. To date, divided power and pulse transformers.
There are also many varieties.dividing models. Counters, in turn, are divided into single-phase, two-phase and three-phase. Directly on the connection of the transformer will be influenced by its type, power and type of meter.
Connection to single phase meter
Connection of current transformers to single phaseThe counter is carried out, as a rule, through the transistor. In this case, the voltage parameter plays a big role. If we consider a pulse transformer 220/220 V, then it is connected using a beam transistor. The adapter will require a single pin.
To reduce the frequency used different typescapacitors. To date, the most common considered to be capacitive models. However, analog devices also have a right to exist. Directly connecting the converter is carried out after checking the negative resistance on the transistors.
How to connect to a two-phase meter?
Connection of current transformers to two-phasethe counter is often carried out through a latitudinal transistor. However, if we are talking about 220 V downsizing models, they can only be connected via capacitors with a large conductivity parameter. Transceivers in circuits are used quite often. With electromagnetic interference, they are struggling quite successfully.
In order to the transistor is not providedhigh overload, stabilizer used. Converters for connection can be found mainly analog type. The negative resistance parameter in this case should not exceed 60 ohms.
Connection to a three-phase meter
Подключение трансформаторов тока к счетчику This type occurs mainly through a discrete transistor. In stores, they are presented with different conductivity parameters. If we consider a pulsed three-phase current transformer, then in this situation it makes sense to immediately put a two-contact converter.
In order to avoid failures in the circuit, high-capacitance capacitors are used. Directly connected to the meter through a choke.
Linear Transistor Circuit
Connection of current transformers through lineartransistor can only occur when using modulators. In this case, power transformers for connection are not suitable for sure. Directly adapter is better to pick up a two-pin. In this converter, many experts recommend installing an inverter. It should be located behind the transistor. However, before this is checked the negative resistance in the circuit. The normal parameter is 55 ohms. Exceeding it means that the converter is installed low-impedance.
Connecting a transformer through an operational transistor
Connection via an operational transistor canbe carried out only to a single-phase meter. Characteristics of the transformer in this case do not play a special role. The problem is sometimes to increase the frequency of the converter. Capacitors for the circuit are used only open type. The conductivity index must be at least 6 microns.
You should also pay attention to the parameternegative resistance. If it exceeds 50 ohms, then the risk of overheating of the converter is high. In this case, the switch is suitable even two-pin.
Wiring Relay Circuit
Wired relay connectioncarried out quite simply. Characteristics of the transformer in this case do not play a special role. In this case, the adapter is not required. Capacitors, many experts recommend installing analog type. The converter, in turn, will need a low impedance. Due to this, problems with reduced frequency occur quite rarely. Before installing the capacitor, the negative resistance of the transformer is checked. The specified parameter must be less than 60 ohms. Otherwise, the capacitor may fail.
Connect via transceiver
Using a transceiver, connect the counter viacurrent transformers are provided with single-ended converters. If we consider pulse transformers, then an analog transistor is required. Additionally, single-contact switches are used. In this case, the conductivity of the current should be at 5 microns. If we talk about isolation transformers, then for them the meters are suitable only for single-phase ones. The limit frequency parameter in the circuit, as a rule, does not exceed 6 Hz. Converters in models are usually installed low impedance. Due to this, failures in transformers occur quite rarely. In this case, the adapter is not a big load.
You should also consider connecting separately.step-down transformers. They belong to the class of high-voltage devices. In this case, the parameter of the operating frequency in the circuit can reach 80 Hz. In order to cope with it, the converter must be installed one-contact. Transistors are used mainly beam. If we talk about a 500 V modification, then in addition a small stabilizer is placed in front of the meter. To increase the current transmission, it fits perfectly.
The use of auxiliary thyristors
Using auxiliary thyristors connectionThe counter through current transformers is carried out only when using converters of one-contact type. However, if we talk about pulse transformers, you can use two-contact modifications. In other cases, this is prohibited. Circuit transistors are used without a stabilizer. In this case, the connection to the meter takes place with the aid of a throttle. Also, many experts recommend installing semiconductor modulators to increase the frequency.
The use of a single junction Zener diode
Single junction zener diodes are famous for the fact thatable to work perfectly with power transformers. Converters for these purposes are selected one-contact. If we consider a 220/220 V isolation transformer, then the stabilizer in this case must be installed near the counter. Modulators are mainly used analog. However, some prefer wave modifications.
With a limiting voltage of 300 V, they are consideredmore effective. They also significantly reduce the risk of failure in a transformer. Connection to single-phase meters is carried out thanks to a choke. In this case, the voltage can withstand only the two-conductor type.
Connection via low frequency comparators
Connection of current transformers to the metersometimes carried out through low-frequency comparators. They maintain the limiting voltage at 500 V. Thus, power transformers for connecting are well suited. However, lowering analogues can also be used. This will require a quality single-ended transducer. Without a beam transistor in this situation is indispensable. To increase the throughput of the converter is possible only with the help of a stabilizer. A switch in such a circuit must be in front of the meter.
Use of high frequency comparators
Through high frequency comparators installationcurrent transformers can be carried out only to three-phase meters. In this case, transistors are allowed to use only the magnetic type. The current conduction parameter in the circuit does not exceed 7 microns. The operating frequency in this case is equal to an average of 80 Hz. For increased sensitivity, two-contact transducers are used.
Beam transistors are rarely used becausethey deal poorly with electromagnetic interference. If we talk about step-down transformers, their connection can occur only with the participation of a powerful modulator. However, before connecting it, the negative resistance in the circuit is checked. Ultimately, it should not exceed 50 ohms.
Permanent tetrode circuit
Permanent tetrodes in the circuit do not give the converterburn out even if the limiting frequency exceeds 80 Hz. In this case, much depends on the type of transformer. If we talk about power devices, then the adapter can be safely taken single-ended. Converters are often used analog. Their conductivity must be at least 7 microns.
Negative resistance in the circuit should notexceed 60 ohms. If we talk about step-down transformers, they can be connected through a tetrode only with single-phase meters. In this case, the transistor is used beam. In turn, the modulators are set wave. The output voltage parameter should not exceed 200 V.
