The Rolec EV Charger CT Clamp is a 100A screened clamp with a 10m cable for compatible Rolec chargers.

ACSR0125-F is listed by Rolec as a 100A up to 35mm² screened CT clamp with 10m cable. It appears across Rolec charger accessory lists, including Zura, WallPod, BasicCharge, Quantum, Hex and SecuriCharge pages, so it is a cross-range measurement accessory rather than a charger-specific power unit. It is used where a compatible Rolec EV charging installation needs current sensing hardware for functions such as load monitoring or load balancing, subject to the charger and site configuration. The key verified buying details are the 100A rating, up to 35mm² conductor fitment, screened CT format and 10m cable. It should be selected from the charger documentation and final circuit layout, not assumed from another charger range. For broader Rolec EV hardware, see the Rolec range.

• Rolec product code ACSR0125-F
• 100A screened CT clamp
• Suitable for conductors up to 35mm²
• 10m cable included
• Listed across multiple Rolec EV charging accessory schedules
• Used with compatible Rolec charger measurement or load functions
• ACSR0325 provides three 100A clamps with 10m cables for 3-phase Zura

What does the CT clamp measure?

A CT clamp is used to monitor current on a selected conductor. In an EV charging installation, that measurement can support charger functions that respond to site load, provided the charger and configuration support the function. The accessory does not add charging power by itself and does not replace protective devices.

The 100A rating and up to 35mm² fitment are the critical sizing facts for this SKU. The installer should confirm the conductor size and the Rolec charger accessory requirement before ordering. The 10m cable length should also be checked against the planned route between the measured conductor and the charger or control input.

Where the single-clamp version fits

The single-clamp version is used where the compatible charger arrangement needs one CT input. Rolec lists the part across several AC charger product pages, so it is relevant to more than one range. That does not mean it should be applied without checking the specific installation instructions.

Single-phase installations are the most common reason to use one CT clamp, but the product copy should not assume a function unless the charger confirms it. For Zura, Rolec separately lists ACSR0325 as three 100A screened CT clamps with 10m cables for three-phase Zura. That three-clamp kit is the right route where the verified accessory requirement is three phase.

Choosing ACSR0125-F or ACSR0325

ACSR0125-F is the single 100A screened CT clamp with 10m cable. ACSR0325 is the three-clamp Zura kit, listed as 3 x 100A up to 35mm² screened CT clamps with 10m cables. The difference is not cosmetic. It changes the number of measured conductors and the intended charger arrangement.

Choose the single clamp where the supported charger and circuit design call for one CT. Choose the three-clamp kit where the verified Zura three-phase installation calls for three CTs. If a site has a three-phase supply but the charger documentation calls for a different accessory, that charger documentation should decide the final product selection.

Install checks before ordering

The installer should confirm cable size, cable route, clamp location and charger compatibility before the product is ordered. CT clamps need to be installed in the correct orientation and in the correct part of the circuit for the charger function to work as intended. The 10m cable may be sufficient for compact installs, but larger meter positions or plant rooms may need route planning.

CT clamp products also sit alongside protective and consumer unit equipment rather than replacing it. Where an EV charger needs its own circuit protection, installers should still check the relevant RCBO, RCD, MCB and surge protection requirements for the charger and site. The CT clamp provides measurement input only.

CT clamp questions

Loading delivery information...