Carlo Gavazzi CTD5S1251AXXX is a CTD-5S split-core 125/1 A current transformer with Class 1 accuracy, 1 VA rated secondary apparent power and a 26 mm conductor opening for electrical metering and energy-monitoring applications.
£172.51
The Carlo Gavazzi CTD5S1251AXXX is a reliable split-core current transformer designed for electrical current measurement, energy monitoring and metering applications. As part of the Carlo Gavazzi CTD-5S current transformer series, its split-core construction enables installation around an existing conductor without requiring the primary cable or busbar to be disconnected.
This current transformer provides a 125 A rated primary current and 1 A secondary output, giving a 125/1 A transformation ratio for connection to compatible energy meters, power analysers and electrical monitoring equipment. The CTD5S1251AXXX provides Accuracy Class 1, making it suitable for dependable current and energy measurement in industrial and commercial electrical systems.
With a 26 mm conductor opening and support for busbars up to 26 mm wide, the CTD5S1251AXXX provides a practical solution for retrofit installations in switchboards, distribution panels and control cabinets. Its split-core configuration helps simplify the addition of electrical monitoring to existing installations while minimising disruption to established wiring.
Current transformers such as the Carlo Gavazzi CTD-5S convert the current flowing through a primary conductor into a lower proportional secondary current suitable for compatible measuring instruments. This allows energy meters, power analysers and monitoring systems to measure electrical loads without requiring the full primary circuit current to pass directly through the measuring device.
The split-core construction of the CTD5S1251AXXX makes it particularly useful for retrofit projects. The transformer can be opened and positioned around an existing conductor, helping reduce installation disruption while its 125/1 A ratio provides a standard 1 A secondary signal for compatible electrical measurement equipment.
| Manufacturer | Carlo Gavazzi |
|---|---|
| Series | CTD-5S |
| Model | CTD5S1251AXXX |
| Product type | Split-core current transformer |
| Rated primary current | 125 A |
| Rated secondary current | 1 A |
| Transformation ratio | 125/1 A |
| Accuracy class | Class 1 |
| Rated secondary apparent power | 1 VA |
| Hole diameter | 26 mm |
| Maximum busbar width | 26 mm |
| Core type | Split core |
| Number of primary inputs | 1 |
| Mounting type | Conductor / busbar mounting |
The CTD5S1251AXXX is used to convert a 125 A primary current into a proportional 1 A secondary current for compatible electrical meters, power analysers and energy-monitoring equipment.
The current transformer has a 125/1 A transformation ratio, with a rated primary current of 125 A and a rated secondary output of 1 A.
The CTD5S1251AXXX provides Accuracy Class 1, making it suitable for dependable current and energy measurement applications.
The CTD5S1251AXXX has a 26 mm conductor opening and supports busbars up to 26 mm wide.
A split-core current transformer can be opened and fitted around an existing conductor, making it particularly useful for retrofit metering and monitoring installations where disconnecting existing cables or busbars would be inconvenient.
Carlo Gavazzi CTD-5S split-core current transformers provide a practical solution for electrical current measurement and energy monitoring, combining straightforward retrofit installation with dependable integration into industrial and commercial metering systems.
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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...