Siemens 3WL1363-4DG45-1AN2 6300A Circuit Breaker

Condition: Used | Stock: Available

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The Siemens 3WL1363-4DG45-1AN2 WL III 6300 H Air Circuit Breaker represents the pinnacle of low-voltage circuit breaker technology, delivering an extraordinary 6300A continuous current rating at 1000V. As part of Siemens' prestigious 3WL series, this breaker is engineered to protect the largest and most critical electrical distribution systems in the world. When facility-wide power continuity is non-negotiable, the WL III 6300 H provides the ultimate level of protection, selectivity, and operational reliability.

At Aeliya Marine, we understand that circuit breakers at this power level are not merely components – they are the guardians of entire industrial complexes, marine vessels, and infrastructure facilities. The Siemens 3WL series has earned its reputation as the breaker of choice for applications where failure is not an option. With its Category B breaking capacity, IEC/EN 60947-2 certification, and integrated ETU27B electronic trip unit, the 3WL1363-4DG45-1AN2 delivers protection capabilities that meet the most demanding requirements of modern electrical distribution systems.

Key Features & Specifications

The Siemens 3WL1363-4DG45-1AN2 WL III 6300 H circuit breaker incorporates a comprehensive array of features that establish it as the premier choice for ultra-high-current electrical protection.

Model: WL III 6300 H from Siemens' premium 3WL circuit breaker series
Current Rating: 6300A maximum for the largest electrical distribution applications
Trip Unit: ETU27B electronic trip unit with comprehensive protection functions
Insulation Voltage (Ui): 1000V for high-voltage industrial distribution
Impulse Voltage (Uimp): 12kV for superior transient overvoltage protection
Breaking Category: Cat B for selective coordination with downstream devices
Standards: IEC/EN 60947-2 certified for international acceptance
Frequency: 50/60 Hz for worldwide application
Accessory Rating:5000A / 690V (3WL9213-7BC41-0BA1-Z)

Technical Specifications

Specification	Details
Brand	Siemens
Series	3WL – WL III 6300 H
Part Number	3WL1363-4DG45-1AN2
Maximum Current (In)	6300A
Trip Unit	ETU27B
Insulation Voltage (Ui)	1000V
Impulse Voltage (Uimp)	12kV
Rated Voltage (Ur)	690V
Breaking Category	Cat B
Standards	IEC/EN 60947-2
Frequency	50/60 Hz
Accessory	3WL9213-7BC41-0BA1-Z (5000A, 690V)
ID Number	6641260622006
Condition	Used

Applications & Use Cases

The Siemens 3WL1363-4DG45-1AN2 WL III 6300 H circuit breaker is engineered for the most critical and demanding electrical protection applications. Its 6300A rating makes it suitable for protecting the largest electrical installations in the world.

Main Incoming Protection: Primary protection for large industrial plant main switchboards
Shipboard Distribution: Main switchboard protection for large commercial vessels and naval ships
Data Centers: Critical protection for hyperscale data center electrical infrastructure
Steel & Metals: Protection for electric arc furnaces and large rolling mill drives
Oil & Gas: Main electrical protection for offshore platforms and refinery complexes
Power Plants: Station service and auxiliary system protection
Infrastructure: Metro systems, airports, and hospital main electrical protection

⚠ 6300A Circuit Breaker – Rare Availability

Siemens WL III 6300H breakers are among the highest-rated ACBs available. Secure this unit from Aeliya Marine for your critical protection needs.

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Why Choose the Siemens 3WL1363-4DG45-1AN2

Siemens has been at the forefront of electrical protection technology for over a century, and the 3WL series represents the company's flagship air circuit breaker platform. The WL III 6300 H is the highest-rated breaker in this family, capable of protecting electrical systems with continuous currents up to 6300A. The Category B rating indicates this breaker can intentionally delay tripping during short-circuit conditions to allow downstream breakers to clear faults first – a critical capability for maintaining selective coordination in complex distribution systems.

The ETU27B electronic trip unit provides comprehensive protection including long-time, short-time, instantaneous, and ground fault protection, all with adjustable settings to match specific application requirements. Advanced metering functions provide real-time current, voltage, power, and energy measurements that can be transmitted to power management systems via optional communication modules.

ETU27B Electronic Trip Unit Capabilities

The ETU27B trip unit transforms the 3WL breaker into an intelligent power distribution node. Protection functions include overload protection with adjustable time-current curves, short-time delayed protection for selective coordination, instantaneous protection for catastrophic fault clearing, and ground fault protection for personnel safety and equipment protection. The integrated LCD display shows all three phase currents, neutral current, and trip history for maintenance diagnostics.

Compatibility & Integration

The Siemens 3WL series is designed for seamless integration into comprehensive electrical distribution systems. A wide range of accessories and communication options enables customization for specific application requirements.

Mounting: Fixed, withdrawable, and drawout configurations available
Accessories: Motor operators, shunt trips, auxiliary switches, and interlocks
Communication: Modbus, Profibus, Ethernet, and BACnet options for BMS integration
Busbars: Compatible with standard 3WL horizontal and vertical busbar systems
Metering: ETU27B provides voltage, current, power, and energy measurement

Maintenance & Support

Aeliya Marine performs comprehensive testing on every Siemens 3WL circuit breaker before listing. Our inspection includes contact resistance measurement, mechanism timing tests, trip unit calibration verification, and insulation testing. We provide complete documentation including wiring diagrams, dimension drawings, and commissioning procedures.

Your purchase is backed by our 30-day warranty and includes free worldwide shipping. Our technical support team can assist with breaker selection, coordination studies, installation guidance, and troubleshooting for your specific application.

Frequently Asked Questions

Q1: What is the current rating of this breaker?

The 3WL1363-4DG45-1AN2 has a maximum continuous current rating of 6300A, making it one of the highest-rated air circuit breakers available.

Q2: What does the ETU27B trip unit offer?

The ETU27B provides comprehensive protection functions including long-time, short-time, instantaneous, and ground fault protection, along with advanced metering capabilities.

Q3: What is the insulation voltage rating?

The breaker has a rated insulation voltage (Ui) of 1000V and impulse withstand voltage (Uimp) of 12kV.

Q4: What does Category B breaking mean?

Category B indicates the breaker has intentional short-time delay capability for selective coordination, allowing downstream breakers to clear faults first.

Q5: Is this breaker suitable for marine use?

Yes, the 3WL series is widely used in marine switchboards. The 1000V rating and robust construction make it ideal for shipboard electrical systems.

Q6: What warranty is provided?

Aeliya Marine provides a 30-day warranty on this used breaker, along with free worldwide shipping and technical support.

Q7: Can this breaker be withdrawable?

Yes, the 3WL series is available in fixed, withdrawable, and drawout configurations. Contact our team to confirm the specific configuration of this unit.