How to Distinguish Between a High Current Transformer and a Current Transformer?

In power systems, although high current transformers and current transformers have similar names, they differ significantly in their functional positioning, structural design, and application scenarios.

Functional Positioning Differences:

High Current Transformer: Primarily used for power transmission, transferring energy under high current and high power conditions. It is essentially a step-down transformer, responsible for converting high voltage or high current into low voltage or low current suitable for downstream equipment.

Current Transformer: Primarily used for measurement and protection. Its core task is to convert a large primary current into a proportionally smaller secondary current to power ammeters, relay protection devices, or for data acquisition.

Structural Design Differences:

High Current Transformer: Typically uses an EI type or toroidal structure, emphasizing insulation class and heat dissipation performance. It has a larger number of coil turns, and the core materials require high temperature and voltage resistance.

Current transformers: Mostly employ a toroidal or through-hole structure, emphasizing primary-side penetration capability and secondary-side accuracy. The primary side is typically a hollow iron core through which the cable passes, while the secondary coil has fewer turns.

Differences in Application Scenarios

High-current transformers: Widely used in applications requiring high power transmission, such as motor starting, power conversion, and industrial control.

Current transformers: Primarily used for current measurement in power systems, relay protection, energy consumption statistics, and other applications requiring precise monitoring of current changes.

What are the main application areas of high-current transformers?

High-current transformers, with their excellent voltage withstand and step-down capabilities, have become key components in many industries. Understanding their main application scenarios helps in more accurate selection.

Industrial Automation and Motor Control

In large motor drive systems, high-current transformers are used to connect the motor and controller. They effectively reduce the motor terminal voltage, protect the control circuit from high-voltage surges, and provide the necessary current measurement reference.

Medical Equipment and Precision Instruments

Medical equipment (such as CT scanners and MRI machines) has extremely high requirements for power supply stability. Ningbo Chuangbiao's high-current transformers possess excellent anti-interference capabilities, maintaining stable output current in high electromagnetic environments to ensure safe equipment operation.

Audio Systems and Power Matching

In high-end audio systems, high-current transformers are used for power matching and impedance matching. They filter out power supply noise, provide clean current, and improve sound quality.