ABB 1SDA067559R1 TMAX XT Series 4-Pole MCCB (Industrial-Grade Overcurrent Protection)

The ABB 1SDA067559R1 represents a premium four-pole molded case circuit breaker from the TMAX XT family, engineered to deliver robust overcurrent and short-circuit protection in high-demand industrial electrical systems. With a 50kA breaking capacity at 400V AC and thermomagnetic trip technology, this breaker ensures reliable isolation across all phases and neutral, making it the ideal choice for critical infrastructure, manufacturing facilities, and commercial power distribution networks where safety and uptime are non-negotiable.

Designed for electrical contractors, facility managers, and system integrators who demand precision protection, the 1SDA067559R1 combines field-adjustable trip settings with a compact footprint that fits seamlessly into existing switchgear assemblies. Whether you're upgrading legacy protection systems or designing new installations, this MCCB delivers the performance and compliance required for modern electrical codes.

Backed by ABB's century of innovation in power distribution, this circuit breaker offers exceptional value through its modular accessory compatibility, extended electrical life rating, and comprehensive certification to international standards—ensuring your investment protects both equipment and personnel for years to come.

Core Features & Technical Advantages

→ 50kA Short-Circuit Breaking Capacity: Handles fault currents up to 50,000 amperes at 400V AC (Icu rating), providing superior protection in networks fed by transformers up to 1600kVA—critical for preventing catastrophic equipment damage and maintaining system integrity during fault conditions.

✓ Four-Pole Simultaneous Switching: All four poles (3 phases + neutral) disconnect together, ensuring complete circuit isolation required by IT power systems, generator installations, and applications where neutral switching is mandated by local electrical codes or safety protocols.

✓ Adjustable Thermomagnetic Trip Unit (TMA): Field-tunable thermal overload protection (0.7-1.0x In) and magnetic short-circuit protection (5-10x In) allow precise coordination with downstream devices, eliminating nuisance tripping while maintaining selective protection—no calibration tools required.

✓ 25,000 Operations Electrical Life: Engineered for long-term reliability with trip-free mechanism that prevents manual override during fault conditions, reducing maintenance costs and ensuring consistent protection performance throughout the breaker's service life.

✓ Front-Accessible Fixed Terminals: Simplifies installation and maintenance in space-constrained enclosures, enabling faster wiring changes without removing the breaker from the panel—saving labor hours during commissioning and retrofit projects.

✓ IEC 60947-2 & UL 489 Certified: Dual certification ensures global compliance and interoperability, with type-tested coordination tables available for selective protection design in complex distribution hierarchies.

Industrial Application Scenarios

Manufacturing Plant Main Distribution: Protects primary feeders in automotive, pharmaceutical, and food processing facilities where 400V three-phase power feeds multiple production lines. The 4-pole configuration ensures safe isolation during maintenance, while the 50kA rating handles fault currents from large transformers without cascading shutdowns.

Data Center & IT Infrastructure: Ideal for UPS output distribution and generator transfer panels in mission-critical facilities. The neutral switching capability meets TN-S and IT earthing system requirements, preventing ground loop issues and ensuring clean power delivery to sensitive server equipment.

Commercial Building Electrical Rooms: Serves as main or sub-distribution protection in office towers, hospitals, and retail centers. Adjustable trip settings accommodate varying load profiles from HVAC systems, lighting circuits, and elevator drives, while maintaining coordination with upstream utility breakers.

Motor Control Centers (MCC): Provides feeder protection for variable frequency drives (VFDs) and soft starters controlling pumps, fans, and conveyors. Magnetic trip adjustment prevents false trips during motor starting inrush (typically 6-8x full load current), while thermal protection guards against sustained overload conditions.

Renewable Energy & Generator Systems: Protects generator output circuits in backup power installations and solar inverter arrays. Four-pole switching ensures complete disconnection during maintenance or fault conditions, critical for worker safety and compliance with NFPA 70E arc flash standards.

Technical Specifications & Selection Guide

Selection Criteria: Choose this 4-pole MCCB when your application requires neutral switching for complete circuit isolation, such as IT earthing systems, generator installations, or jurisdictions mandating neutral disconnection. For standard TN-C-S systems where neutral switching isn't required, consider the 3-pole equivalent (1SDA067767R1) to reduce panel space and cost. Verify that the 50kA breaking capacity exceeds your calculated prospective short-circuit current (Isc) at the installation point—consult transformer nameplate data or conduct a fault level study if uncertain.

Advanced Integration & Customization Options

Remote Control & Monitoring: Compatible with ABB's comprehensive accessory range including shunt trip coils (24-240V AC/DC) for emergency shutdown integration, undervoltage releases for loss-of-voltage protection, and auxiliary contact blocks (1NO+1NC to 2NO+2NC) for status indication to SCADA systems or building management platforms.

Motor Operator Automation: Field-installable motor operators enable remote ON/OFF control via PLC or relay logic, ideal for load shedding schemes, automatic transfer switch (ATS) coordination, or scheduled equipment cycling in energy management systems.

Busbar & Terminal Adaptors: Rear-connected busbar adaptors available for high-density switchboard assemblies, reducing wiring labor and improving fault current distribution. Insulated cable lugs and terminal shrouds enhance safety in live-front installations.

Selective Coordination: ABB provides type-tested coordination tables (selectivity charts) showing time-current curves for cascading protection with upstream MCCBs and downstream miniature circuit breakers (MCBs), ensuring only the faulted circuit opens during overload or short-circuit events—minimizing downtime in critical processes.

Delivery Timeline & Service Commitment

Standard Lead Time: In-stock units ship within 2-3 business days via express courier (DHL/FedEx). Custom configurations with specific accessories or trip settings require 7-10 business days for factory assembly and testing.

Warranty Coverage: 12-month manufacturer's warranty from date of shipment, covering defects in materials and workmanship. Extended warranty programs available for critical infrastructure projects requiring 3-5 year coverage.

Technical Support: Pre-sales application engineering assistance for protection coordination studies, short-circuit calculations, and panel layout optimization. Post-sales support includes installation guidance, troubleshooting, and replacement part sourcing.

Documentation Package: Each unit ships with installation manual, dimensional drawings, wiring diagrams, and calibration certificate. CAD files (DWG/DXF), BIM models (Revit), and EPLAN macros available for download to streamline design workflows.

Frequently Asked Questions

Q: What's the functional difference between 3P+N and 4P operating modes?
A: In 3P+N configuration, the neutral pole switches mechanically but does not participate in overcurrent tripping—only the three phase poles trigger the trip mechanism. In 4P mode, all four poles trip simultaneously on any phase or neutral fault. Mode selection depends on system earthing (TN-S, TN-C-S, IT) and local electrical code requirements. Consult IEC 60364 or NEC Article 230 for guidance.

Q: Can I adjust the trip settings without specialized calibration equipment?
A: Yes, the TMA release features accessible rotary dials on the breaker front for both thermal (long-time) and magnetic (instantaneous) trip adjustments. Settings are marked with clear scales and can be adjusted using a standard flathead screwdriver. No external test equipment or recalibration is required after adjustment—settings are mechanically locked once configured.

Q: Is this breaker suitable for direct motor protection applications?
A: While the 1SDA067559R1 can protect motor feeders, it should be coordinated with a motor starter (contactor + overload relay) for optimal protection. Set the magnetic trip threshold above the motor's locked rotor current (typically 6-8x full load amperes) to prevent nuisance tripping during starting. For motors above 50HP, consider electronic trip units with motor protection curves.

Q: How do I calculate the required breaking capacity for my installation?
A: Calculate prospective short-circuit current (Isc) using the formula: Isc = (Transformer kVA × 1000) / (√3 × Voltage × %Impedance). For a 1000kVA transformer with 6% impedance at 400V: Isc = (1000000) / (1.732 × 400 × 0.06) ≈ 24kA. The 50kA rating of this breaker provides a 2:1 safety margin. Always verify calculations with a licensed electrical engineer.

Q: What accessories are required for remote trip functionality?
A: Install a shunt trip coil (order separately, specify voltage: 24V DC, 110V AC, or 240V AC) into the breaker's accessory slot. Connect the coil to your control circuit (PLC output, fire alarm panel, or emergency stop button). When energized, the shunt trip mechanically releases the breaker latch, opening all poles within 50ms—ideal for emergency shutdown systems.

Q: Does the breaker support arc flash reduction maintenance mode?
A: The standard TMA trip unit does not include arc flash reduction features. For applications requiring NFPA 70E compliance with reduced incident energy during maintenance, consider upgrading to the electronic Ekip trip unit with zone-selective interlocking (ZSI) and maintenance mode settings that temporarily reduce trip thresholds.

Ready to Upgrade Your Electrical Protection?

Secure reliable overcurrent protection for your critical infrastructure with the ABB 1SDA067559R1 TMAX XT 4-pole MCCB. Our technical team is ready to assist with protection coordination studies, accessory selection, and volume pricing for multi-unit projects.

Contact us today: Email sale@ninermas.com or call +0086 187 5021 5667 for immediate technical support and quotation. Bulk orders qualify for project pricing and extended payment terms.

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