ABB 1SDA068232R1 XT3S 250 TMD 250-2500 4p F F InN=100% 250A 4-Pole Fixed Moulded Case Circuit Breaker

The ABB 1SDA068232R1 XT3S 250 TMD 250-2500 4p F F InN=100% is a 250A, 4-pole fixed-mounted power circuit-breaker from the Tmax XT3S series, engineered for reliable protection of transformers, generators, and installations. Delivering a breaking capacity of 50 kA at 400 V AC and featuring a TMD (Thermal-Magnetic) trip unit with an adjustable range of 250–2500 A, this breaker meets the most demanding industrial requirements. Its neutral protection is set at 100% (InN=100%), making it ideal for balanced and unbalanced load networks.

Technical Specifications

Certifications & Standards

• RoHS: Compliant with the Restriction of Hazardous Substances Directive
• REACH: Compliant with EU REACH chemical regulation
• EU Directive 2011/65/EU: Restriction of hazardous substances in electrical and electronic equipment
• Amendment 2015/863: Updated substance restrictions under RoHS 2 framework
• IEC 60947-2: International standard for low-voltage switchgear and controlgear — circuit-breakers
• IEC60947-2: Verified compliance with low-voltage circuit-breaker performance requirements
• ATEX: Suitable for use in potentially explosive atmospheres per ATEX directive
• CE: Meets all applicable European Union safety, health, and environmental requirements
• VDE: Certified by the Association for Electrical, Electronic & Information Technologies (Germany)
• WEEE: Registered under the Waste Electrical and Electronic Equipment Directive for proper end-of-life disposal

Applications & Use Cases

• Transformer feeder and secondary protection in industrial power distribution panels
• Generator protection in standby and prime power systems
• Main installation protection in commercial and industrial facilities
• 4-pole distribution networks requiring 100% neutral conductor protection (InN=100%)
• High-fault-level environments demanding 50 kA breaking capacity at 400 V AC
• Control panels requiring compact fixed-mounted MCCB with TMD trip unit

Frequently Asked Questions

What does InN=100% mean on the XT3S 250 TMD 250-2500 4p F F InN=100%?

InN=100% means the neutral pole is rated at the same current as the phase poles (100% of In = 250 A), providing full protection of the neutral conductor — essential in 4-wire systems with significant neutral current.

What is the breaking capacity of the ABB 1SDA068232R1?

The ABB 1SDA068232R1 has a verified breaking capacity of 50 kA at 400 V AC, making it suitable for high fault-level industrial applications.

What is the adjustable current range of the TMD trip unit?

The TMD (Thermal-Magnetic) trip unit on the XT3S 250 TMD 250-2500 4p F F InN=100% is adjustable from 250 A to 2500 A, offering flexibility for diverse load profiles.

Is the ABB 1SDA068232R1 suitable for ATEX environments?

Yes, the product carries ATEX certification, confirming its suitability for installation in or near potentially explosive atmospheres when used within rated parameters.