Measuring transducers are called special devices that are necessary for accurate determination of the value (temperature, voltage, current). The results are used for processing by operators. The main parameters of modifications of this type include signal conductivity, conversion speed and output voltage.
Also, experts take into account the indicator of resistance and permissible overload, which is measured in amperes. A standard transmitter includes a grid trigger. The contacts of the model are fixed on the dinistor. Zener diodes in devices are used with different conductivity. To protect the equipment, a triode is used. In order to understand this issue in more detail, it is necessary to consider the main types of measuring transducers.
Device types
By the method of action, models of temperature, voltage, and also current are distinguished. Low-frequency devices are typically used in transformer substations. The signal conductivity index for converters of this type averages no more than 34 microns. Many models have two triggers. The output sensitivity of devices depends on the voltage limit. High frequency models are suitable for power plants.
It is also important to note that the separation of the converters is carried out according to the number of channels. This parameter depends on the type of triode. The maximum model is capable of supporting no more than three channels. Some modifications are able to work in the circuit only with alternating current. The maximum overload rating for converters of this type is on average 4.5 A. There are also devices for working in direct current networks. Quite often they can be found in high-voltage substations.
Single Channel Temperature Modifications
These measuring systems are actively used in hydropower plants. The maximum passability parameter for them is about 70%. The contacts of the models of the presented type are usually used from copper. Thyristors are used with various flanges. Valves are needed to maintain a stable pressure. Relays in converters are used channel type. In devices with regulators there is a selector. This type of measuring transducers (market price) cost about 13 thousand rubles.
Features of two-channel temperature models
Measuring systems of this type are often used in large hydropower plants. For laboratory research, they are great. Many modifications use a channel adapter. In this case, the maximum permeability parameter, as a rule, does not exceed 80%.
In size, the converters of this type are quite different. Zener diodes in devices are designed for high pressure. Controllers are often used with moving contacts. On average, a temperature measuring transducer costs about 18 thousand rubles.
The use of three-channel temperature transducers
A three-channel temperature converter is quite rare. The scope of the models is very extensive. First of all, it is important to note that the models are suitable for hydraulic pumps of various capacities. In this case, the adapter is used tubular type. Triggers in devices are used with multiple controllers. Filters are installed channel type. Their average cross-country ability is about 85%. In our time, there is a high-quality three-channel temperature converter of about 25 thousand rubles.
Description of single-channel voltage devices
Measuring voltage converters are produced with various structural elements. First of all, it is important to note that the market has many modifications without triggers. They work due to dampers. To increase the permissible voltage, analog capacitors are used. They are installed with a conductivity of 30 and 40 microns. If we consider the first option, it is important to note that they have contact insulators.
For powerful drive devices, the models are great. Controllers for devices are quite rare. The protection system is often used by the KI22 series. If we consider modifications to 40 microns, then they have controllers. The limit switching parameter, as a rule, does not exceed 80%. Many models use two triggers. For 20 kW drive units, models of this type are great. On average, a single-channel measuring equipment costs about 28 thousand rubles.
Characteristics of two-channel voltage models
Two-channel devices are great for hydraulic presses. The permissible conductivity parameter in devices is about 22 microns. On average, the limit voltage is about 300 V. Modifications to the protection system are very common. Rectifiers are used on two plates.
The selector conductivity in this case depends on the limiting frequency. These devices can operate only in an alternating current circuit. It is also important to note that modifications with throughput selectors are presented on the market. A distinctive feature of converters of this type is considered a high switching rate.
If you believe the reviews of experts, then for hydraulic devices at 20 kW these models fit perfectly. Quite often, appliances are sold with one controller. Regulators in this case are absent. It costs an average of high-quality two-channel measuring equipment of about 20 thousand rubles.
Three-channel voltage devices
Converters of this type are often used to provide drive devices. Models with triggers of various conductivity are produced. Models with contact plates are distinguished by their versatility. In this case, the passability indicator averages no more than 75%. If you believe the reviews of specialists, then for 15 kW drives devices are great. There are also special devices with linear triggers.
The ripple coefficient of the converters of this type is approximately 65%. In this case, a lot depends on the sensitivity of the contacts. The maximum output voltage parameter for the models is allowed to be 320 V. The protection system, as a rule, is used with the PC23 marking. Many models are manufactured without insulators. For powerful drives, these devices are not suitable. It is also important to note that they have a low permeability parameter. You can buy a high-quality primary measuring transducer of this type at a price of 23 thousand rubles.
Single Channel AC Models
Single-channel devices of this series are able to work with many high-voltage devices. If you believe the reviews of experts, then the regulators in the devices are used in different classes. First of all, it is important to note modifications with wave controllers. The permeability parameter for models averages 45%.
Devices with frequency controllers are rare. For power transformers, models of this type are great. Their contacts are often installed on the dinistor. Data processing speed takes a little time. Control units are used with capacitors. Models with adjustable triodes are in great demand.
The signal conductivity in devices is at least 50 microns. The threshold voltage indicator, as a rule, depends on the rectifier. The specified element in the device is responsible for pulse oscillations. On average, the output resistance is able to withstand 30 ohms. There is a high-quality measuring transducer (alternating current) in the region of 17 thousand rubles.
Description of Dual Channel AC Devices
Two-channel devices of this type are used for hydraulic substations of different capacities. If you believe the reviews of experts, then the frequency of the device is quite different. The average signal conductivity is at least 22 microns. The output voltage limit depends on the trigger. As a rule, it is used dipole type. In some cases, automatic capacitors are installed.
Converters of this type are great for various power plants. However, it is important to note that models often use a variable tetrode. Thus, the permissible temperature indicator is 35 degrees. Modifications with analog triggers are rare. There is a two-channel converter (measuring) of about 14 thousand rubles.
Using Three-Channel AC Models
Three-channel devices are only suitable for power substations. The protection system for devices is usually indicated by the PC23 series. In this case, triggers are applied only to the binary type. The indicator of the maximum voltage at their output is not more than 340 V. Analog filters in converters are very rare.
The stabilization rate averages 85%. For low-frequency transformers, devices are not suitable in the best way. Models with beam controllers are very common. Processing data on average takes 45 ms. You can buy a high-quality transducer (measuring) at a price of 18 thousand rubles.
Single Channel DC Models
Single-channel converters of this type are great for drive devices. The index of the maximum load at the output is not more than 4 A. On average, the patency of the modifications does not exceed 80%. If you believe the reviews of experts, then for the drive mechanisms for 3 kW, the devices of this series are great.
Capacitors for models are used analog and switched type. If we consider the first option, then they have a high overload parameter. A single-channel converter (measuring) is not suitable for 7 kW drive devices.
Description of two-channel DC devices
Converters of this class are manufactured with one or more triggers. If you believe the reviews of experts, for transformers models are great. The protection system they have, as a rule, is used by the PC44 series. The plates in the devices are used with different conductivity. For high-voltage shields devices fit perfectly. The maximum load at the output is not more than 8 A.
Models with electrode dampers are very rare. For 300 V substations, they are not suitable. The throughput indicator for the converters of this series averages 75%. Modifications with triodes can significantly speed up the data processing. This converter (measuring) on average costs around 19 thousand rubles.