Siemens HMG3G800L 800A 3-Pole 600 V Circuit Breaker Potential Transformer

Meet the Siemens HMG3G800L — a robust, industrial-grade circuit breaker engineered for high-demand power systems. With an 800 A current rating, a 3-pole configuration, and a 600 V rating, this device is purpose-built to protect heavy-duty three-phase feeders and motor circuits in demanding environments. Paired with potential transformer workflows, it supports precise protection and metering schemes in modern electrical distribution setups.

Key specifications at a glance

• Part Number: HMG3G800L
• Current rating: 800 A
• Poles: 3
• Voltage rating: 600 V
• Type: Circuit Breaker, compatible with potential transformer protection schemes
• Brand: Siemens

What sets this breaker apart

• Three-pole protection for balanced three-phase systems — ensures simultaneous disconnection of all phases, improving safety and fault clearance.
• High-capacity 800 A rating suitable for heavy-duty feeders, large motors, and critical supply lines in industrial settings.
• 600 V compatibility for typical industrial and commercial power networks, enabling versatile integration across facilities.
• Potential transformer compatibility supports advanced protection schemes and accurate monitoring without compromising reliability.
• Built for reliability from Siemens, a trusted name in electrical protection and power distribution, with rugged construction designed for installations in harsh or space-constrained environments.

Ideal applications

• Industrial facilities with heavy three-phase loads, such as machining centers, presses, and conveyors
• Large commercial complexes and data centers requiring robust feeder protection
• Electrical distribution panels and switchgear where reliable phase isolation is critical
• Systems employing potential transformer protection and metering for precise fault detection

Why choose the HMG3G800L over standard breakers

• Designed specifically for high-current, three-phase distribution, reducing the risk of unbalanced faults and improving coordination within protection schemes.
• Siemens engineering guarantees consistency in trip performance and compatibility with common protective accessories and metering interfaces.
• Clear, durable construction supports long service life in demanding environments, with straightforward integration into existing panel architectures.

Practical notes for installation and use

Ensure compatibility with your panel and busbar configuration, and follow local electrical codes during installation. Verify correct wiring for three-phase circuits and coordinate with your protection strategy when integrating potential transformers. Regular inspections and adherence to Siemens manuals will help maintain reliable operation and fault clearance when it matters most.