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A Split Core Current Transformer is a specialized type of current transformer designed for applications where easy installation and retrofitting are required. Unlike conventional core current transformer models with a solid magnetic path, a split core CT can be opened and clamped around an existing conductor without disconnecting it. This makes it highly practical for energy monitoring, power quality analysis, and protective relays in both industrial and commercial systems.
The split core CT operates on the same electromagnetic principle as traditional current transformers, but with added mechanical flexibility. When alternating current flows through a conductor, it generates a magnetic field around it. The CT’s magnetic core captures this flux, inducing a proportional current in the secondary winding. This induced current is scaled down according to the CT ratio, allowing safe measurement by meters and protective devices.
In a split core design, the magnetic core is divided into two halves with a hinge or latch mechanism. When closed around the conductor, the two parts form a continuous magnetic path, ensuring accurate flux linkage. Advanced split core CTs often include precision materials to minimize errors from the small air gap at the split joint.
Non-Intrusive Installation
In many existing electrical systems, shutting down power to install a core current transformer is costly and disruptive. Split core CTs eliminate this problem by allowing installation without disconnecting conductors.
Cost and Time Efficiency
Easy installation reduces labor costs and downtime, making them ideal for retrofitting energy monitoring systems in commercial buildings or factories.
Scalable Energy Management
Split core CTs enable real-time monitoring of current consumption, harmonics, and load profiles. This data supports energy efficiency programs and compliance with sustainability targets.
System Protection and Safety
By accurately measuring current, split core CTs feed protective relays and meters with reliable data. In low-voltage systems, an lv current transformer can be applied to provide precise monitoring, preventing overloads and equipment failures.
Flexibility in Smart Grids
As utilities and industries move toward digitalized monitoring, split core CTs provide the scalability needed to deploy sensors across existing infrastructure without major modifications.
Case 1: Commercial Building Energy Monitoring
A large office complex sought to reduce energy costs and improve load balancing. Installing traditional current transformer units would have required shutting down power, which was impractical during business hours. Instead, split core CTs were clamped around feeders and sub-panels without interruption. Data collected was integrated into a building management system, enabling the operator to cut energy consumption by 15%.
Case 2: Industrial Plant Protection
An industrial facility using heavy machinery faced frequent equipment failures due to undetected overloads. Engineers installed split core CTs on critical motors and distribution feeders. The CTs supplied current data to protective relays, which quickly tripped during abnormal conditions. As a result, downtime was reduced by 20%, and equipment life expectancy improved.
Case 3: Renewable Energy Integration
In a solar farm project, operators needed to monitor inverter outputs and grid injection currents. Split core CTs were chosen because they allowed fast installation on multiple feeders without disconnecting the system. Accurate current measurements, comparable in performance to an lv current transformer, helped the farm comply with utility regulations and optimize energy output analysis.
Split Core Current Transformers combine the accuracy of traditional current transformers with the flexibility of clamp-on designs. They are widely used in energy monitoring, protection, and smart grid applications because they solve key problems such as intrusive installation, downtime, and scalability. Real-world case studies show their effectiveness in reducing energy costs, protecting equipment, and enabling renewable integration.
As power systems continue to evolve, split core CTs will play an increasingly important role in retrofitting legacy infrastructure, supporting energy efficiency initiatives, and enabling smarter, safer, and more sustainable electrical networks.
Metering loop electrical parameter acquisition.
Type | Ratio | Measuring | Protecting | Operatign Frequency(Hz) | |||
Rated input Primary Current (A) | Accuracy | Phase Linerity Error | Primary Current Max (A) | Accuracy | |||
FK-10 | 1000:1 | 5,10,20,32,50,75 | 0.5 | ≤30' | 300 | 5P | 50 |
FK-16 | 2000:1 | 50,100,150 | 0.5 | ≤30' | 1000 | 5P | 50 |
FK-24 | 2500:1 | 100,150,200,250 | 0.5 | ≤30' | 2000 | 5P | 50 |
FK-36 | 3000:1 | 200,300,400,500 | 0.5 | ≤30' | 4000 | 5P | 50 |
A Split Core Current Transformer is a specialized type of current transformer designed for applications where easy installation and retrofitting are required. Unlike conventional core current transformer models with a solid magnetic path, a split core CT can be opened and clamped around an existing conductor without disconnecting it. This makes it highly practical for energy monitoring, power quality analysis, and protective relays in both industrial and commercial systems.
The split core CT operates on the same electromagnetic principle as traditional current transformers, but with added mechanical flexibility. When alternating current flows through a conductor, it generates a magnetic field around it. The CT’s magnetic core captures this flux, inducing a proportional current in the secondary winding. This induced current is scaled down according to the CT ratio, allowing safe measurement by meters and protective devices.
In a split core design, the magnetic core is divided into two halves with a hinge or latch mechanism. When closed around the conductor, the two parts form a continuous magnetic path, ensuring accurate flux linkage. Advanced split core CTs often include precision materials to minimize errors from the small air gap at the split joint.
Non-Intrusive Installation
In many existing electrical systems, shutting down power to install a core current transformer is costly and disruptive. Split core CTs eliminate this problem by allowing installation without disconnecting conductors.
Cost and Time Efficiency
Easy installation reduces labor costs and downtime, making them ideal for retrofitting energy monitoring systems in commercial buildings or factories.
Scalable Energy Management
Split core CTs enable real-time monitoring of current consumption, harmonics, and load profiles. This data supports energy efficiency programs and compliance with sustainability targets.
System Protection and Safety
By accurately measuring current, split core CTs feed protective relays and meters with reliable data. In low-voltage systems, an lv current transformer can be applied to provide precise monitoring, preventing overloads and equipment failures.
Flexibility in Smart Grids
As utilities and industries move toward digitalized monitoring, split core CTs provide the scalability needed to deploy sensors across existing infrastructure without major modifications.
Case 1: Commercial Building Energy Monitoring
A large office complex sought to reduce energy costs and improve load balancing. Installing traditional current transformer units would have required shutting down power, which was impractical during business hours. Instead, split core CTs were clamped around feeders and sub-panels without interruption. Data collected was integrated into a building management system, enabling the operator to cut energy consumption by 15%.
Case 2: Industrial Plant Protection
An industrial facility using heavy machinery faced frequent equipment failures due to undetected overloads. Engineers installed split core CTs on critical motors and distribution feeders. The CTs supplied current data to protective relays, which quickly tripped during abnormal conditions. As a result, downtime was reduced by 20%, and equipment life expectancy improved.
Case 3: Renewable Energy Integration
In a solar farm project, operators needed to monitor inverter outputs and grid injection currents. Split core CTs were chosen because they allowed fast installation on multiple feeders without disconnecting the system. Accurate current measurements, comparable in performance to an lv current transformer, helped the farm comply with utility regulations and optimize energy output analysis.
Split Core Current Transformers combine the accuracy of traditional current transformers with the flexibility of clamp-on designs. They are widely used in energy monitoring, protection, and smart grid applications because they solve key problems such as intrusive installation, downtime, and scalability. Real-world case studies show their effectiveness in reducing energy costs, protecting equipment, and enabling renewable integration.
As power systems continue to evolve, split core CTs will play an increasingly important role in retrofitting legacy infrastructure, supporting energy efficiency initiatives, and enabling smarter, safer, and more sustainable electrical networks.
Metering loop electrical parameter acquisition.
Type | Ratio | Measuring | Protecting | Operatign Frequency(Hz) | |||
Rated input Primary Current (A) | Accuracy | Phase Linerity Error | Primary Current Max (A) | Accuracy | |||
FK-10 | 1000:1 | 5,10,20,32,50,75 | 0.5 | ≤30' | 300 | 5P | 50 |
FK-16 | 2000:1 | 50,100,150 | 0.5 | ≤30' | 1000 | 5P | 50 |
FK-24 | 2500:1 | 100,150,200,250 | 0.5 | ≤30' | 2000 | 5P | 50 |
FK-36 | 3000:1 | 200,300,400,500 | 0.5 | ≤30' | 4000 | 5P | 50 |