How is a Current Transformer Better than a Conventional Model
Current transformers are installed on electric connections with loads greater than 100 Amps. They measure current passing through the connection and added multiplier and provide accurate readings on energy consumptions. They are primarily used for measuring instruments like am, volt, kilowatt-hour, etc. Eastron Europe’s affordable EasyClick and Standard Metering devices use LORAWAN sensors that are easy to deploy, providing real-time current consumption data for users to manage and optimise power consumption.
Both three-phase current transformer and conventional ammeters serve the same purpose, I.e., measuring electric current. But conventional models cannot measure current for larger connections. Also, the power measurement approach differs alongside other points where a current transformer proves more effective than the latter.
Current Transformers Vs. Conventional Am: Elucidating the Difference
Current transformers are built around the electromagnetic induction principle, where the high current in a power system is stepped down to a level safely measured by the metering device.
There are certain advantages of using current transformer, and they include the following:
- Safety: Transformers are used in high-voltage systems that impair the safe measuring of the current directly. Therefore, split type current transformers, like the ones from Eastron Europe (ESCT-RJ370 and ESCT-T24 series), are used to step down the current to a safe and measurable level.
- Accuracy: Current transformers ensure accurate and reliable meter readings, even at high currents. This is vital in applications where precise measurements are paramount.
- Isolation: The primary winding of the current transformer is electrically isolated from the secondary winding. This adds an extra degree of protection against faults in the primary circuit.
- Wide Range of Applications: Transformers, like Eastron Europe's ESCT-RJ370 series, are used in various high-voltage applications, including power transmission and distribution systems, where high currents are expected.
- Reduced Power Losses: Since the three-phase current transformer steps down the current before measurement, much less power is dissipated in the metering circuit. This approach reduces power losses.
That being said, a few disadvantages of core current transformer are worth mentioning here, such as:
- Complexity: Current transformers are more intricate than conventional am. The reason is there's a need for an additional current transformer.
- Cost: Current transformers and associated equipment are a little above the average price of simple am. But current transformer devices are from Eastron Europe are comparatively budget friendly.
Conventional Ammeters are deployed for a direct measurement of the current flowing through a power circuit. Usually, these traditional metering models use a shunt resistor or any other sensing device/method to measure the current.
There are certain advantages of using conventional power metering devices, such as:
- Simplicity: Conventional ammeters are comparatively simple in design. And they can perform in the absence of additional transformers or complex circuitry.
- Lower Cost: Typically, conventional ammeters are more budget-friendly, offering a cost-effective solution to measure power consumption compared to split core current transformers.
- Suitable for Low Voltage Applications: Unlike current transformer, conventional metering models have broader applications in low-voltage circuits and utilities. Here, power levels fall within the range of the meter's capabilities.
The numerous disadvantages of conventional transformer include:
- Safety Concerns: A direct measurement of high currents has been proven hazardous. Hence, traditional metering devices require added safety precautions.
- Accuracy: In the absence of a remote monitoring system and an Internet connection, metering data is challenging to share, not to mention the lower accuracy levels of power consumption data compared to split current transformers. This is especially true at higher current levels.
- Limited Range: These conventional models have a limited range of current for accurate reading and measurement.
Therefore, in all senses and purposes, split core type current transformer, like Eastron Europe's EasyClick ESCT-RJ370 models, are always the preferred ones. The reasons are simple:
- The metering devices can be used in high-voltage applications
- The smart energy monitoring models are safe to use
- These core current transformers provide accurate readings and share consumption data in real-time
In contrast, conventional ammeters are more apt for measuring low-voltage applications and situations where simplicity and cost are critical.
However, the choice between a split core current sensor and a conventional ammeter depends entirely on the specific requirements of the application. These requirements could include voltage levels, current levels, safety considerations, and budget constraints.
The Other Benefits of Choosing Current Transformer
Apart from the advantages mentioned above and comparisons, there are other benefits of choosing three-phase current transformers over conventional models.
Some of the vital reasons are mentioned below:
- Compatibility with Various Loads: Split type current transformers are compatible with a horde of devices, aptly measuring current across various loads, from small household circuits to large industrial applications.
- Ease of Installation: They are comparatively easy to install and seamlessly integrate into existing electrical systems. Such capabilities make transformer devices a practical choice for new installations and retrofit projects.
- Remote Monitoring and Control: Many modern transformers, like Eastron Europe's Easclick models, are imbibed with communication capabilities. This facilitates remote monitoring and control, also ensuring operational efficiency and easier management of electrical systems.
- Data Logging and Analysis: Current transformer shares detailed historical data on current usage patterns, which are further used for load profiling, energy management, and other analytical purposes.
- Compliance and Reporting: Smart power monitoring devices ensure compliance with regulatory requirements, supporting accurate energy usage reporting, often necessary for legal and regulatory purposes.
- Integration with Smart Grids: They are pivotal in developing smart grids, where real-time data is needed to optimise grid performance, manage demand, and respond to changing conditions.
- Fault Detection and Diagnosis: Flexible core current transformers easily detect abnormal currents indicating faults or other issues in the electrical system. This often leads to faster diagnosis and resolution of problems, eventually reducing downtime and maintenance costs.
- Cost-Effectiveness: Despite higher initial investment costs than conventional models, accuracy and other benefits usually result in cost savings over the long term. They, in fact, give higher returns than traditional devices.
The Final Takeaway
Three-phase current transformers have evolved as one of the essential tools in B2B segments and other commercial/industrial sectors. These devices, like the ones from Eastron Europe, have become paramount in accurately measuring and managing electrical current for various applications. They are mandatory in ensuring the efficiency, safety, and reliability of electrical systems.