TE-XR1-21-1 Terminal extension

Why Choose the ABB TE-XR1-21-1 Terminal Extension?

The ABB TE-XR1-21-1, product code 1SEP408576R0001, is a terminal extension for ABB SlimLine XR1 switch-disconnector equipment. It is specifically designed to accommodate a single current transformer with a 21 mm diameter, providing the required extended connection arrangement for current-measurement applications.

ABB specifies the TE-XR1-21-1 for an XR1 apparatus with one CT, including applications using the MBS ASR 20.3 current transformer format. The extension supports compatible Al/Cu connections, making it suitable for professional low-voltage switchgear installations where current transformers are incorporated for metering, monitoring or protection.

The TE-XR1-21-1 belongs to the ABB SlimLine XR accessory family and is identified by EAN 7025840071167. Its dedicated XR1 and Ø21 mm CT configuration helps panel builders select the appropriate manufacturer accessory rather than adapting terminals intended for a different frame size or current-transformer arrangement.

Key Advantages

• Genuine ABB SlimLine XR accessory.
• Designed specifically for XR1 switch-disconnector equipment.
• Provides a terminal extension for one current transformer.
• Compatible with a 21 mm diameter CT.
• Suitable for compatible aluminium and copper conductor connections.
• Supports current measurement within low-voltage distribution equipment.
• Dedicated ABB configuration simplifies component selection for XR1 installations.
• Suitable for switchboard, metering and industrial power-distribution applications.

Key Features

• ABB TE-XR1-21-1 terminal extension.
• ABB product ID 1SEP408576R0001.
• Part of the SlimLine XR product family.
• Designed for XR1 apparatus.
• Configuration for 1 CT.
• Compatible current-transformer diameter: Ø21 mm.
• Suitable for compatible Al/Cu connections.
• Applicable to MBS ASR 20.3 CT arrangements.
• EAN 7025840071167.
• Supplied as one accessory.

Current Transformer Integration in Low-Voltage Switchgear

Current transformers are used in electrical distribution systems to provide proportional current signals for metering, monitoring and protection equipment. Installing a CT around a main current path requires sufficient physical space and an appropriate terminal arrangement. A purpose-designed terminal extension provides this additional connection geometry while maintaining compatibility with the associated switch-disconnector equipment.

The ABB TE-XR1-21-1 is specifically configured for a single Ø21 mm CT on an XR1 apparatus. Selecting the corresponding ABB terminal extension helps ensure that the switch-disconnector, current transformer and conductor connection arrangement are mechanically compatible within the intended SlimLine XR installation.

Typical Applications

• ABB SlimLine XR1 switch-disconnector installations.
• Single current-transformer configurations.
• Current measurement in low-voltage switchgear.
• Industrial power-distribution systems.
• Electrical switchboards and distribution panels.
• Energy metering and monitoring installations.
• Protection and current-sensing circuits.
• OEM panel-building and switchgear assembly.