Cutler Hammer HFWF3100VL 100A 3-Pole 70K Circuit Breaker

CUTLER HAMMER HFWF3100VL: High-Performance 100A 3-Pole Circuit Breaker

The CUTLER HAMMER HFWF3100VL is a molded case circuit breaker (MCCB) designed to provide superior overcurrent and short-circuit protection for the most demanding industrial and marine electrical systems. It’s a heavy-duty machine. This type of breaker HFW is designed with high breaking capacity to insure the integrity of power distribution networks of 690VAC.

The HFWF3100VL is a small-sized model of the Series G family that has great performance capabilities. It is tailored to areas where electrical failures may cause significant delay and has a 70kA interrupting rating at 415V. The “V” mark signifies a 50°C calibration, which makes it suitable for use in the high-ambient temperature settings of industrial furnace areas and engine rooms. It’s a thermal-magnetic breaker for quick protection and a reliable, long-term voyage.

Model Details:

Brand: Eaton / Cutler-Hammer

Model: HFWF3100VL

MPN: HFWF3100VL

Frame Type: F-Frame (Series G)

Number of Poles: 3-Pole

Country of Origin: United States

Technical Specifications

Our Marine Engineer’s Guide:

When installing the HFWF3100VL in a marine switchboard, always verify the torque settings for the load-side lugs. Vibration is the silent killer of electrical connections at sea; a loose lug creates heat, which can lead to a “nuisance trip” due to the 50°C thermal calibration.

Pro Tip: If you are replacing an older F-frame breaker, check the mounting plate dimensions. While the Series G is compact, its high-breaking capacity (70k) means the internal arc chutes are substantial. Ensure you have adequate clearance for gas venting in the event of a high-fault trip. Regularly perform an insulation resistance (IR) test on the poles to ensure moisture hasn’t compromised the internal housing in humid environments.