Description
Key Technical Specifications
- Model Number: KW3400F
- Manufacturer: Eaton
- Product Type: Molded Case Circuit Breaker (MCCB)
- Frame Size: K-Frame, Series C
- Pole Configuration: Three-pole (3P)
- Amperage Rating: 400 A
- Voltage Rating: 600 VAC / 250 VDC
- Trip Type: Adjustable Thermal, Adjustable Magnetic
- Short Circuit Capacity: 45 kAIC at 415 VAC
- Terminal Configuration: Without terminals (requires field selection)
Functional Role & Application Analysis
The Eaton KW3400F is a heavy-duty K-frame molded case circuit breaker designed to protect industrial power distribution networks from overloads and short circuits. It solves the critical need for reliable, adjustable branch circuit protection in high-voltage AC and DC environments. This breaker acts as the primary isolation and safety device for downstream equipment, ensuring that electrical faults do not cascade through the panelboard.
The KW3400F features adjustable thermal and magnetic trip settings, allowing field engineers to fine-tune the protection curve to match specific load characteristics. With a short circuit interrupting capacity of 45 kAIC at 415 VAC, it is built to safely clear massive fault currents without catastrophic failure.
Typical use cases include:
- Industrial Power Distribution: Protecting main feeders and large motor control centers in manufacturing plants.
- Commercial Infrastructure: Serving as a primary feeder breaker in large commercial panelboards rated up to 600 VAC.
- Legacy System Maintenance: Replacing failed or obsolete K-frame breakers in existing Eaton panelboards without requiring a full panel upgrade.
Our Quality Standard & Testing Process
We understand that a compromised circuit breaker in a power distribution system can lead to arc flash incidents and catastrophic equipment damage. We have established a rigorous, multi-stage testing process to ensure every Eaton KW3400F we ship meets the highest safety standards.
- Visual & Mechanical Inspection: All breakers undergo professional cleaning and mechanical operation testing. We verify there is no physical damage, corrosion, and that the toggle mechanism operates smoothly with proper latch engagement.
- Primary Injection Testing: We perform primary injection testing to verify the adjustable thermal and magnetic trip points. The breaker is confirmed to trip accurately at the specified current thresholds.
- Insulation Resistance Test: We measure the insulation resistance between poles and pole-to-ground to ensure the internal arc chutes and insulation are not degraded.
- Warranty Backing: Only parts that pass all diagnostic tests are approved for shipment and backed by our full 12-month warranty.
Eaton KW3400F
Compatibility & Migration Paths
To ensure this Eaton KW3400F is 100% compatible with your panelboard, you must check these key compatibility points. Failure to verify this is a common project risk that can lead to physical fitment or protection coordination issues.
- Frame and Series Match: Confirm your panelboard accepts K-Frame, Series C breakers. Eaton has multiple frame sizes (J, K, L, F) and series (A, B, C) that are not interchangeable.
- Terminal Selection: This specific KW3400F model is sold without terminals. You must verify and procure the correct line and load side terminal kits for your specific bus bar configuration.
- Trip Setting Verification: Check your existing coordination study to determine the required thermal and magnetic trip settings. The adjustable dials on this breaker must be set to match your system’s protection curve.
- Get Expert Help: Unsure about your panel compatibility or terminal requirements? Contact our technical team today for a free verification check before ordering.
