Current Sense Transformer

Precision Engineered Current Sense Transformers for Power Applications

Current Sense Transformers are essential components used to accurately monitor current in both AC and DC power systems. At CET Technology, we specialize in the design and manufacturing of high-performance Current Sense Transformers tailored for use in DC to DC and AC to DC power supplies. These components provide a reliable method to convert primary current into a proportional voltage output—critical for feedback control, protection, and measurement in electronic circuits.

A typical Current Sense Transformer is configured with a one or two-turn primary winding and is paired with a burden resistor to produce a fixed output voltage relative to the primary current. While many designs utilize a toroidal core for compact size and performance, these transformers can be built in nearly any form factor to match your application needs.

The performance of Current Sense Transformers is highly dependent on proper design. Several parameters must be considered during selection:

• Input Current Range and Frequency: The core must be sized to handle the maximum expected current without saturating. A core that is too small may lead to measurement errors or circuit failure, while an oversized core may add unnecessary cost and bulk.
  
  

• Turns Ratio: This directly affects the resolution of the transformer. A higher turns ratio allows for finer measurement granularity, which is especially important in sensitive monitoring systems.
  
  

• Burden Resistor and Output Voltage: These determine how many volts are output per ampere of primary current, a critical factor for signal processing accuracy.
  
  

Current Sense Transformers are widely used in power supplies, motor drives, energy meters, and various control systems where electrical isolation and accurate current monitoring are required. CET Technology offers both standard models—such as the 82T, 84T, and 86T series—and fully custom solutions built to meet your exact electrical and mechanical specifications.

If you're developing a new design or upgrading an existing system, contact CET  Technology today or submit a request for a quote. Our team is ready to help you find or build the ideal Current Sense Transformer for your application.