CT or Rogowski Coil? A Comprehensive Guide to Eastron’s High-Current Measurement Accessories

When selecting current-sensing accessories for smart meter applications, the choice often depends on the specific requirements of the project. Factors such as current range, available installation space, and meter interface compatibility all influence the final selection.
What are the characteristics of standard CTs, miniature CTs, and Rogowski coils? How should you choose the right one for different application scenarios? From installations in confined spaces to ultra-high current monitoring, Eastron’s ESCT series covers a wide range of current-sensing needs. Let’s explore how to match the right product to specific applications.

ESCT-B Series | High-Current Split-Core CT

Recommended Applications
Commercial & industrial energy storage | Large power distribution cabinets | Industrial equipment

Product Advantages
Supports primary current inputs ranging from 100A to 6000A;
Secondary output supports 5A/1A, compatible with devices designed for traditional current inputs;
Wide aperture design, suitable for installation with large-gauge cables or busbars;
Supports both base mounting and busbar mounting, allowing for flexible installation based on site conditions.

ESCT-RJ-1 Series | Quick-Connect Split-Core CT

Recommended Applications

Smart meter accessories | Energy monitoring systems | Power distribution monitoring projects

Product Advantages

Split-core design allows for installation without disconnecting existing wiring;

Equipped with an RJ12 interface for quick connection and reduced on-site wiring errors;

Supports multiple output options: 100mV, 100mA, and 333mV;

Covers a current measurement range of 5A to 1200A.

ESCT-RJ-3 Series | Three-Phase Integrated CT

Recommended Applications
Three-phase power distribution systems | Smart meter integration | Three-phase energy monitoring

Product Advantages

Integrated three-phase CT design reduces on-site installation workload;

Uses RJ12 connectors for quick and easy connection;

Supports current measurements ranging from 5A to 600A;

Output options include 333mV, 100mV, 100mA, and 40mA, ensuring compatibility with various data acquisition devices.

ESCT-TA/TU Series | Flexible Rogowski Coil

Recommended Applications
Smart power distribution cabinets | Building energy management | Small equipment monitoring

Product Advantages

Compact split-core design, suitable for installations with limited space;

ESCT-TA series supports current measurements from 5A to 630A with 100mA/40mA outputs;

ESCT-TU series supports current measurements from 5A to 600A with 333mV/100mV outputs;

Multiple output specifications available for easy integration with various smart meters.

ESCT-RC Series | Miniature Split-Core CT

Recommended apps
Ultra-large current monitoring | Power equipment testing | Complex installation environment

Product advantages

Supports 10A~100kA current measurement range;

Flexible coil design can flexibly adapt to complex installation spaces;

There is no risk of secondary open circuit, and there is no iron core saturation problem;

Available in a variety of sizes, you can choose according to site needs.

Covering diverse scenarios to meet a wide range of needs

In real-world projects, no single current-sensing accessory is suitable for every scenario. Choosing between a Current Transformer (CT) and a Rogowski coil requires a comprehensive assessment based on current range, installation conditions, and the smart meter interface.

The Eastron ESCT series covers a wide range of current-sensing applications, allowing for flexible integration with smart meters and energy monitoring systems to suit specific project requirements.