Hyundai UAN32B3A 3200A ACB for High-Capacity Power Protection

The Hyundai UAN32B3A M2C2S268P 3 Pole Air Circuit Breaker is a high-capacity electrical protection device engineered by Hyundai Heavy Industries Co., Ltd. through their Electro Electric Systems division. Designed for critical power distribution applications, this air circuit breaker (ACB) delivers exceptional breaking capacity and reliable circuit protection for industrial, commercial, and marine installations where electrical system integrity is paramount.

With a maximum rated current of 3200A and rated insulation voltage of 1000V, the UAN32B3A is engineered to protect large-scale electrical systems against overload, short circuit, and earth fault conditions. The breaker's impressive 100 kA breaking capacity at 220-500V and 85 kA at 550-690V ensures effective fault interruption even in installations with high prospective short-circuit currents. This level of protection is essential for safeguarding expensive downstream equipment including transformers, switchgear, and critical process loads.

In the realm of industrial automation and marine technology, reliable circuit protection forms the foundation of electrical safety and operational continuity. The Hyundai UAN32B3A meets the most demanding international standards including EN/IEC 60947-2, VDE 0660 Category B, and GOST R 50030.2, demonstrating its suitability for deployment in projects across global markets with varying regulatory requirements.

Key Features & Specifications

The Hyundai UAN32B3A M2C2S268P incorporates advanced design features that establish it as a premium air circuit breaker for high-current applications. These specifications demonstrate the breaker's capability to deliver reliable protection in the most demanding electrical installations:

• 3200A Maximum Current: High current rating accommodates large power distribution feeders and main incoming breaker applications in industrial switchboards.
• 1000V Insulation Voltage: Ui rating of 1000V ensures adequate insulation withstand for standard low-voltage power systems up to 1000V AC.
• 100 kA Breaking Capacity: Exceptional 100 kA Icu at 220-500V provides reliable fault interruption in high-power installations with substantial short-circuit levels.
• 100% Ics = Icu: Service breaking capacity equals ultimate breaking capacity, ensuring full performance throughout the breaker's service life.
• 85 kA Short-Time Withstand: 85 kA Icw for 1 second demonstrates the breaker's ability to withstand fault currents during selective coordination intervals.
• 12 kV Impulse Voltage: High Uimp rating of 12 kV provides excellent transient overvoltage protection for sensitive downstream equipment.
• Multi-Standard Certification: Compliant with EN/IEC 60947-2, VDE 0660 Cat.B, and GOST R 50030.2 for global deployment flexibility.
• 3-Pole Configuration: Standard 3-pole design with 3200A frame size for three-phase power system protection.

Technical Specifications

Applications & Use Cases

The Hyundai UAN32B3A M2C2S268P is purpose-built for high-current power distribution protection across a diverse range of industrial, commercial, and marine applications. Its 3200A rating and exceptional breaking capacity make it suitable for the most critical circuit protection roles in large-scale electrical installations.

Main Incoming Circuit Protection

As a main incoming breaker in large switchboards and power distribution centers, the UAN32B3A provides primary protection for the entire electrical installation. Its 3200A rating accommodates substantial power demands from manufacturing plants, data centers, hospitals, and commercial complexes. The 100 kA breaking capacity ensures reliable fault interruption even when supplied by high-capacity transformers.

Marine Switchboard Applications

Marine electrical systems aboard large vessels and offshore platforms require circuit breakers that can withstand the rigors of shipboard environments while providing reliable protection for critical systems including propulsion, navigation, and safety equipment. The Hyundai UAN series meets these requirements with robust construction and comprehensive international certifications that satisfy major classification societies.

Industrial Power Distribution

Heavy industrial facilities such as steel mills, petrochemical plants, and mining operations depend on reliable circuit protection to maintain continuous production. The UAN32B3A's high current rating and 85 kA short-time withstand capability enable selective coordination schemes that isolate faults while maintaining power to unaffected portions of the electrical system.

Why Choose the Hyundai UAN32B3A Air Circuit Breaker

When specifying circuit protection for high-current applications, several critical factors influence equipment selection. The Hyundai UAN32B3A addresses each of these considerations with engineering excellence that reflects Hyundai Heavy Industries' decades of experience in heavy electrical equipment manufacturing.

Exceptional Breaking Performance: The 100 kA ultimate breaking capacity at 220-500V places this breaker among the highest-performance devices in its class. This capacity provides a substantial safety margin for installations supplied by large transformers or multiple parallel sources where prospective fault currents can reach extreme levels.

Full Service Breaking Capacity: The Ics = 100% Icu rating means the breaker can interrupt its full rated breaking capacity and remain in service afterward. Some competitive products offer reduced service breaking capacity, requiring breaker replacement after high-level fault interruption. The Hyundai design eliminates this concern and reduces lifetime ownership costs.

Global Standard Compliance: Certification to EN/IEC 60947-2, VDE 0660, and GOST standards enables deployment in European, Asian, and CIS markets without additional testing or certification. This multi-standard compliance simplifies procurement for international projects and ensures consistent protection performance across geographically distributed installations.

Compatibility & Integration

The UAN32B3A is engineered for integration with standard switchboard configurations used in international markets. Its 3200A frame size conforms to industry-standard dimensions that facilitate retrofit applications and replacement of legacy breakers from other manufacturers. The breaker is compatible with standard busbar systems, shutter mechanisms, and compartment configurations used in Form 3 and Form 4 switchboard constructions.

The breaker supports both fixed and withdrawable mounting configurations, providing flexibility for switchboard design and maintenance access planning. Withdrawable mounting enables rapid breaker replacement during maintenance without de-energizing the entire switchboard, minimizing downtime for critical installations.

Coordination with upstream and downstream protective devices is facilitated by the breaker's well-characterized time-current curves and short-time withstand rating. The 85 kA Icw for 1 second enables selective coordination with downstream molded case circuit breakers, ensuring that faults are cleared by the breaker nearest to the fault location.

Maintenance & Support

Air circuit breakers require periodic maintenance to ensure continued reliable operation. Recommended maintenance activities include contact inspection and dressing, arc chute cleaning, mechanism lubrication, and trip unit calibration verification. The frequency of maintenance depends on the number of operating cycles and the severity of fault interruptions experienced.

Aeliya Marine supports the Hyundai UAN32B3A with our standard 30-day warranty and free worldwide shipping. Our technical team can provide guidance on installation requirements, maintenance scheduling, and coordination studies to optimize the protection scheme for your specific application.

Frequently Asked Questions

Q1: What is the difference between Icu and Ics in circuit breaker ratings?

Icu (ultimate breaking capacity) is the maximum short-circuit current the breaker can interrupt under specified test conditions. Ics (service breaking capacity) is the current the breaker can interrupt and still remain in service afterward. With Ics = 100% Icu, the Hyundai UAN32B3A can interrupt its full rated capacity and continue operating without replacement.

Q2: What does Category B (VDE 0660) mean for this breaker?

Category B classification under VDE 0660 indicates that this breaker has a short-time withstand current (Icw) rating, meaning it can withstand fault currents for a specified duration (1 second in this case) without tripping. This enables selective coordination with downstream breakers in the protection hierarchy.

Q3: Can this breaker be used for generator protection?

Yes, the UAN32B3A can be used for generator main breaker applications. The high breaking capacity and short-time withstand rating are well-suited for generator protection. However, proper coordination with generator differential and overcurrent protection relays should be verified during system design.

Q4: What maintenance interval is recommended for this air circuit breaker?

Maintenance intervals depend on operating frequency and fault history. As a general guideline, annual inspection is recommended for breakers in continuous service. Breakers that have interrupted significant fault currents should be inspected promptly. The operating mechanism should be exercised periodically to prevent sticking.

Q5: Is the used condition of this breaker verified for operational readiness?

Yes, all used products from Aeliya Marine undergo inspection and functional verification before shipment. Our 30-day warranty provides additional assurance that the breaker will perform to specification upon installation.

Q6: Can this breaker be retrofitted into existing switchgear?

The UAN32B3A is designed to industry-standard dimensions for 3200A frame air circuit breakers. Compatibility with existing switchgear should be verified by comparing mechanical dimensions, busbar configurations, and compartment requirements. Our technical team can assist with compatibility assessment.

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