Carlo Gavazzi CTD9H7505AXXX solid-core current transformer with a 750 A primary rating, 5 A secondary output, class 0.5 accuracy and capacity for busbars up to 125 × 35 mm.
£130.38
The Carlo Gavazzi CTD9H7505AXXX is a solid-core AC current transformer (CT) designed for accurate measurement of high currents in industrial electrical installations, energy monitoring systems and distribution panels. As part of the Carlo Gavazzi CTD9H current transformer series, it converts a rated primary current of 750 A into a standard 5 A secondary output for connection to compatible meters, power analysers and monitoring equipment.
This through-feed current transformer provides a practical method of measuring high AC currents while maintaining electrical isolation between the primary conductor and the measurement circuit. Its solid-core construction is particularly suitable for permanent installations, while the horizontal CTD9H format accommodates large busbars commonly found in industrial switchboards and power distribution equipment.
With a 750 A primary current rating, 5 A secondary output and accuracy class 0.5, the CTD9H7505AXXX is well suited to precision metering and energy-management applications. It accommodates busbars up to 125 × 35 mm and provides a 36 mm hole diameter, offering flexibility for integration into industrial electrical installations.
Current transformers such as the Carlo Gavazzi CTD9H7505AXXX proportionally reduce high primary currents to a standard secondary current that can be measured by compatible instrumentation. With a 750/5 A ratio, a 750 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 CTD9H series is designed for industrial switchboards, distribution systems and energy-monitoring installations where dependable current measurement is essential. Its combination of solid-core construction, large busbar capacity and class 0.5 measurement accuracy makes the CTD9H7505AXXX particularly suitable for permanent installations requiring precise monitoring of electrical loads and energy consumption.
| Manufacturer | Carlo Gavazzi |
|---|---|
| Series | CTD9H |
| Model | CTD9H7505AXXX |
| Product type | Solid-core current transformer |
| Rated primary current | 750 A |
| Rated secondary current | 5 A |
| Current transformation ratio | 750/5 A (150:1) |
| Accuracy class | 0.5 |
| Rated secondary apparent power, class 0.5 | 4 VA |
| Rated secondary apparent power, class 1 | 8 VA |
| Rated secondary apparent power, class 3 | 10 VA |
| Primary inputs | 1 |
| Hole diameter | 36 mm |
| Maximum busbar size | 125 × 35 mm |
| Transformer type | Through-feed / window current transformer |
| Core type | Solid core |
| Secondary connection | Screw terminals |
| Mounting orientation | Horizontal |
| Overcurrent limiting factor | FS 5 |
| Dimensions | approx. 160 × 91.7 × 40 mm |
The CTD9H7505AXXX is used to measure high AC currents in electrical distribution, energy monitoring and industrial control systems by converting a rated 750 A primary current into a proportional 5 A secondary current.
The current transformer has a rated ratio of 750/5 A, equivalent to a transformation ratio of 150:1.
The CTD9H7505AXXX has an accuracy class of 0.5 with a rated secondary apparent power of 4 VA at this accuracy class, making it suitable for precise current and energy measurement.
The CTD9H7505AXXX provides a 36 mm hole diameter and is suitable for busbars up to 125 × 35 mm.
The CTD9H7505AXXX is typically installed around a conductor or busbar inside industrial switchboards, electrical distribution panels, power monitoring systems and energy-management installations.
Carlo Gavazzi CTD9H current transformers provide dependable current measurement for industrial installers, panel builders and energy-management professionals, combining solid-core construction with accurate measurement and practical integration into commercial and industrial power systems.
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LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...
2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...