Standard delivery
£8 ex VAT · free over £200UK parcel delivery is £8 ex VAT, or free on orders over £200 ex VAT.
Heavier items may be charged at a weight-based or pallet rate, shown at checkout.

Carlo Gavazzi CTD9H25005AXXX solid-core current transformer with 2500 A primary current and 5 A secondary output for industrial electrical measurement applications.
£150.14
The Carlo Gavazzi CTD9H25005AXXX is a high-performance solid-core AC current transformer designed for accurate current measurement and monitoring in industrial electrical systems. Part of the reliable Carlo Gavazzi CTD-9H series, this horizontal bus-bar mounted current transformer provides a precise 2500 A primary current measurement with a 5 A secondary output for connection to energy meters, protection relays and electrical monitoring equipment.
Designed for demanding power distribution applications, the CTD9H25005AXXX combines robust construction, Class 0.5 accuracy and dependable electrical performance. Its horizontal mounting configuration supports large bus-bar installations up to 35 x 125 mm, making it suitable for switchboards, control panels and high-current industrial distribution systems.
With a 2500 A primary current rating and 5 A secondary output, the CTD9H25005AXXX is ideal for energy measurement, load monitoring and electrical protection applications where reliable current transformation is required.
Current transformers such as the Carlo Gavazzi CTD9H25005AXXX provide safe and accurate current reduction for electrical measurement devices by converting high primary currents into standardised secondary signals. This enables efficient monitoring of electrical loads while maintaining safe separation between high-current conductors and measurement equipment.
The CTD-9H series is designed for industrial switchgear, energy management systems and electrical distribution equipment where dependable measurement accuracy and long-term reliability are essential.
Tick the specs you need, then view products that match.
| Mounting Type | Busbar | |
|---|---|---|
| Device Type | Solid-core CT | |
| Rated Primary Current (A) | 2500 A | |
| Secondary Current / Output | 5 A | |
| Aperture (mm) | 125 × 35 mm | |
| Accuracy Class | Class 0.5 | |
| Manufacturer | Carlo Gavazzi | |
| Series | CTD-9H | |
| Model | CTD9H25005AXXX | |
| Product type | Solid-core AC current transformer | |
| Primary current | 2500 A | |
| Secondary current | 5 A | |
| Accuracy class | Class 0.5 | |
| Mounting type | Horizontal bus-bar mounting | |
| Bus-bar opening | 126 x 36 mm | |
| Maximum bus-bar size | 35 x 125 mm | |
| Hole diameter | 36 mm | |
| Operating frequency | 48–62 Hz | |
| Maximum system voltage | 0.72 kV | |
| Rated insulation level | 3 kV / 1 min at 50 Hz | |
| Insulation class | E (maximum 75 °C) | |
| Short-time thermal current | Typical 100 In / 1 s | |
| Dynamic current rating | 2.5 Ith | |
| Connection | Screw terminals | |
| Cable cross-section | 1.5–6 mm² | |
| Protection rating | IP00 without terminal covers / IP20 with sealable terminal covers and wire terminals | |
| Housing material | Self-extinguishing PA66 UL 94 V-0 | |
| Standards | EN61869-2 | |
| IP Rating | IP20 |
The CTD9H25005AXXX is used for measuring and monitoring high AC currents in industrial electrical systems, switchboards and energy management applications.
The CTD9H25005AXXX has a rated primary current of 2500 A.
The current transformer provides a standard 5 A secondary output for connection to compatible measuring and protection devices.
The CTD9H25005AXXX provides Class 0.5 accuracy for reliable current measurement.
The CTD9H25005AXXX uses a horizontal bus-bar mounting design suitable for large industrial power distribution systems.
Carlo Gavazzi CTD current transformers are widely used by electrical engineers and automation professionals for accurate measurement, monitoring and protection of industrial power systems.
● Service Agreements
Credit Accounts
Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.








● frequently asked questions

At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.
We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.
● latest blog
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...