Abb kxtamirhr Mechanical Interlock Horizontal Tmax Xt

Product Description

The ABB kxtamirhr is a mechanical interlock accessory designed for use with ABB Tmax XT Series molded case circuit breakers. The MIR-H designation indicates a horizontal chassis mounting configuration. This accessory provides a physical interlocking mechanism between two circuit breakers, preventing both units from being closed simultaneously. It is a critical safety and reliability component in transfer switch arrangements, main-tie-main configurations, and other switchgear assemblies where simultaneous energization must be prevented. Installation is typically performed by licensed electricians during panel assembly or switchgear commissioning.

The kxtamirhr horizontal chassis interlock is suited for commercial and industrial electrical distribution systems where ABB Tmax XT Series breakers are deployed side by side in a horizontal orientation. Typical applications include automatic transfer switching panels, bus-tie schemes, and generator interlock systems. This accessory is factory-engineered to align precisely with the breaker chassis geometry and actuator positions of the compatible breaker series.

Key Features

• Horizontal chassis mounting configuration for side-by-side breaker installations
• Mechanical interlock prevents simultaneous closure of two circuit breakers
• OEM ABB accessory engineered for precise fit within the Tmax XT Series platform
• Supports main-tie-main and transfer switch interlock arrangements
• Alternate part number 1SDA066637R1 for cross-reference purposes

Compatibility

Designed for use with ABB Tmax XT Series breakers XT1, XT2, XT3, and XT4 as stated by the manufacturer.

Installation Notes

Installation should be performed by a qualified electrician in accordance with NEC requirements and applicable local electrical codes. De-energize and lock out all affected circuits before installing or adjusting any interlock accessory. Verify that breaker frame sizes and chassis configurations are compatible before mounting. Do not force or modify the interlock mechanism, as improper installation can compromise the interlocking function and create a safety hazard.