CTD9S40005AXXX – 4000 A Primary current, 5A output 35×125 mm

Why Choose the Carlo Gavazzi CTD9S40005AXXX Current Transformer?

The Carlo Gavazzi CTD9S40005AXXX is a high-current split-core AC current transformer (CT) designed for electrical measurement, energy monitoring and power distribution applications. As part of the Carlo Gavazzi CTD9S current transformer series, it converts a rated primary current of 4000 A into a standard 5 A secondary output for connection to compatible energy meters, power analysers and monitoring equipment.

The split-core construction allows the transformer to be opened and installed around an existing conductor or busbar without removing the primary conductor. This makes the CTD9S40005AXXX particularly suitable for retrofit energy-monitoring projects, switchboard upgrades and industrial installations where disconnecting large power conductors would be inconvenient or time-consuming.

With a 4000 A primary current rating, 5 A secondary output and a large 125 × 35 mm busbar capacity, the CTD9S40005AXXX is designed for demanding high-current measurement applications. The CTD9S series combines a compact split-core format with industrial insulation and frequency specifications, making it suitable for large electrical distribution systems and industrial switchboards.

Key Advantages

• Practical split-core current transformer for industrial AC current measurement.
• 4000 A rated primary current suitable for high-current electrical distribution systems.
• Standard 5 A secondary output for compatible meters and monitoring equipment.
• Large 125 × 35 mm busbar capacity for substantial industrial conductors.
• 48–62 Hz operating frequency suitable for standard AC power systems.
• 0.72 kV maximum system voltage for industrial measurement applications.
• Split-core construction simplifies installation around existing conductors and busbars.

Key Features

• Carlo Gavazzi CTD9S current transformer series.
• 4000 A rated primary current.
• 5 A rated secondary current.
• 4000/5 A transformation ratio, equivalent to 800:1.
• Split-core construction for convenient retrofit installation.
• 48–62 Hz operating frequency.
• 0.72 kV maximum system voltage.
• 3 kV RMS rated insulation level at 50 Hz for 1 minute.
• Security factor ≤5.
• Suitable for busbars up to 125 × 35 mm.
• Industrial construction for electrical distribution and energy-monitoring systems.
• Designed for integration with compatible 5 A CT-input metering equipment.

Flexible Current Measurement for Industrial Installations

Current transformers such as the Carlo Gavazzi CTD9S40005AXXX proportionally reduce high primary currents to a standard secondary current that can be measured by compatible instrumentation. With a 4000/5 A ratio, a 4000 A primary current corresponds to a 5 A secondary current, allowing meters and monitoring equipment to measure high-current circuits without carrying the full primary load current.

The CTD9S series combines high-current measurement capability with the installation convenience of a split-core design. Because the core can be opened and fitted around an existing conductor or busbar, the CTD9S40005AXXX is particularly suitable for retrofit energy monitoring, electrical distribution upgrades and industrial installations where removing existing conductors would be impractical.

Typical Applications

• Industrial electrical switchboards and distribution panels.
• High-current busbar measurement systems.
• Retrofit energy monitoring installations.
• Energy meters and power monitoring systems.
• Building energy management systems.
• Industrial machinery and automation panels.
• Electrical load and consumption monitoring.
• Power quality and electrical measurement equipment.