2CSG221140R1101 ABB CT4/300 Current Transformer 300 A/5 A

Why Choose the ABB CT4/300 Current Transformer?

The ABB CT4/300, order code 2CSG221140R1101, is a 300 A/5 A current transformer designed for electrical metering and current measurement applications. Part of ABB's Metering Accessories range, it converts a high primary current into a standardised 5 A secondary current that can be measured safely by compatible meters and electrical measuring instruments.

With a 300 A primary rated current and 5 A secondary output, the CT4/300 provides a transformation ratio of 300:5. This allows measurement equipment to monitor substantial electrical loads without carrying the full primary circuit current through the measuring instrument itself.

The CT4/300 combines accuracy class 0.5 performance with a rated output of 6 VA, making it suitable for accurate electrical metering and monitoring. Its through-primary construction allows the monitored cable or busbar to pass through the transformer aperture, providing a practical solution for switchboards, distribution systems and energy monitoring installations.

Key Advantages

• Purpose-designed current transformer for electrical metering and measurement.
• 300 A/5 A current ratio for monitoring higher-current electrical circuits.
• Accuracy class 0.5 supports precise metering applications.
• 6 VA rated output for compatible measuring equipment.
• Through-primary design suitable for installation around compatible cables and busbars.
• Standard 5 A secondary current supports integration with compatible meters and measuring instruments.
• Part of ABB's established CT4 current transformer range.

Key Features

• ABB CT4 current transformer series.
• 300 A rated primary current.
• 5 A rated secondary current.
• 300:5 current transformation ratio.
• Accuracy class 0.5.
• 6 VA rated power.
• Through-primary current transformer construction.
• Designed for electrical metering and current measurement.
• Suitable for electrical distribution and energy monitoring installations.

Reliable Current Measurement for Electrical Metering

Current transformers allow electrical measuring instruments to monitor high-current circuits by producing a lower secondary current proportional to the current flowing through the primary conductor. This provides a practical interface between high-current electrical distribution circuits and compatible energy meters, ammeters, network analysers and monitoring equipment.

The ABB CT4/300 reduces a nominal 300 A primary current to a 5 A secondary current. Its class 0.5 accuracy and 6 VA rated output make it well suited to metering applications where dependable current measurement is required in commercial and industrial electrical distribution systems.

Typical Applications

• Electrical energy metering systems.
• Industrial switchboards and distribution panels.
• Commercial electrical distribution systems.
• Current monitoring with compatible network analysers.
• Electrical load monitoring and measurement.
• Power and energy management systems.
• Panel-building and electrical instrumentation applications.