Why Choose the ABB MA390T XT1/3 Expansion 3PW?
The ABB MA390T, order code 2CPX041418R9999, is a mounted CombiLine N Tmax circuit breaker expansion module designed for ABB electrical sub-distribution systems. Part of the DESUJ Sub Distribution product group, it provides a purpose-designed installation platform for fixed-mounted ABB Tmax XT1 and XT3 moulded-case circuit breakers within professional low-voltage distribution cabinets.
The MA390T has a 2 RE / 300 mm height and a three-panel-width / 750 mm width, providing 72 space units. It is supplied unequipped and provides installation capacity for up to three ABB Tmax XT1 or XT3 circuit breakers, including compatible three- and four-pole configurations, with a generous 699 mm useful equipment width.
Designed for applications with a maximum rated current of 250 A, the MA390T incorporates a mounting cross beam with M4 slide nuts for secure circuit-breaker installation. Plastic covers with equipment cut-outs, 90-degree press-and-turn closures and a RAL 7035 light-grey finish complete the assembly, while the module is designed for installation on an ABB WR mounting frame in cabinets from 275 mm depth.
Key Advantages
- Purpose-designed Tmax XT1/XT3 circuit breaker expansion module for ABB CombiLine N systems.
- Provides installation capacity for up to three ABB Tmax XT1 or XT3 circuit breakers.
- Suitable for compatible 3-pole and 4-pole fixed-mounted circuit breakers.
- Maximum rated current of 250 A.
- Generous 699 mm useful equipment width.
- Three-panel-width, 750 mm design with 72 space units.
- Mounting cross beam with M4 slide nuts supports secure equipment installation.
- Designed for integration with an ABB WR mounting frame.
Key Features
- ABB CombiLine N interior expansion system.
- MA390T Tmax XT1/XT3 expansion module.
- 2 RE / 300 mm module height.
- 3 panel widths / 750 mm overall width.
- 72 space units.
- 699 mm useful equipment width.
- 687 mm cover cut-out width.
- Unequipped for installation of up to three Tmax XT1 or XT3 circuit breakers.
- Supports fixed-mounted 3-pole and 4-pole devices.
- 250 A maximum rated current.
- Mounting cross beam with M4 slide nuts.
- Plastic covers with equipment cut-outs.
- Remaining unused cover openings can be closed with suitable cover strips.
- 90-degree press-and-turn closures.
- Light-grey RAL 7035 finish.
- Suitable from a minimum cabinet depth of 275 mm.
- Designed for an ABB WR mounting frame.
Structured Tmax XT1 and XT3 Circuit Breaker Integration
Moulded-case circuit breakers provide switching, isolation and overcurrent protection for higher-current distribution circuits. The ABB MA390T provides a coordinated mounting platform for fixed-mounted Tmax XT1 and XT3 devices, with installation capacity for up to three compatible circuit breakers across its three-panel-width CombiLine N configuration.
With a 699 mm useful equipment width, 72 space units and a maximum rated current of 250 A, the MA390T is suited to commercial and industrial distribution assemblies requiring multiple MCCBs within a structured cabinet layout. Its mounting cross beam, M4 slide nuts and 687 mm equipment cut-out provide a practical installation interface, while the WR mounting-frame format supports robust cabinet construction.
Typical Applications
- Commercial and industrial sub-distribution boards.
- ABB Tmax XT1 and XT3 circuit breaker installations.
- Multiple outgoing feeder protection applications.
- Incoming and distribution circuit protection.
- Electrical distribution cabinets and switchboards.
- Low-voltage circuit protection and isolation.
- ABB CombiLine N cabinet expansion and interior fit-out.
