Eaton LGH3630NN Circuit Breaker Frame

No. The "NN" suffix in the catalog number indicates that this is a frame-only unit. You must install a compatible Eaton Series G LG-frame trip unit, such as an LT thermal-magnetic or a Digitrip 310+ electronic trip unit, for the breaker to operate.

No. The "NN" suffix also designates that this breaker frame is supplied without terminals. Lugs and terminal kits must be sourced separately based on the specific wire size and conductor material (copper or aluminum) required for your electrical panel.

Yes. The 630-amp designation refers to the maximum continuous current the frame itself can safely carry. To provide 400 amps of overcurrent protection, you simply need to install a compatible 400-amp Series G trip unit into this frame.

The "H" in the LGH catalog prefix indicates it is the High-Interrupting capacity tier within the Eaton Series G lineup. It is engineered to safely clear significantly larger fault currents than the standard (LGE) or standard-high (LGS) frames, making it suitable for more demanding industrial power systems.

Yes. Eaton acquired the Cutler-Hammer and Westinghouse electrical distribution lines. The LGH3630NN is a direct replacement for identical Series G LG-frame breakers originally branded under the Cutler-Hammer name.

The LGH3630NN is designed for direct busbar integration in heavy-duty commercial and industrial environments. Its bolt-on connection ensures a high-integrity mechanical and electrical bond, making it standard for high-vibration machinery, main switchboards, and motor control centers.

Yes, provided the system's available fault current is within safe limits. At 600V, this breaker frame is rated to safely interrupt up to 25,000 amps (25 kAIC). Installing it in a system with a higher potential fault current creates a severe safety hazard.

Yes. While the frame itself does not dictate the protection type, you can configure it for ground fault protection by installing a compatible Eaton Digitrip 310+ electronic trip unit equipped with LSIG capabilities, or by adding a Series G earth leakage module.

Yes. The Eaton Series G design allows for the field installation of internal accessories such as shunt trips, auxiliary switches, and undervoltage release mechanisms, which are standardized across the LG-frame family.

Yes. This LG-frame breaker supports external operating mechanisms, including variable depth rotary handles and motor operators, allowing it to be safely actuated from the outside of a motor control center or electrical enclosure.