Eaton / Cutler-Hammer KD Series Circuit Breakers
The Eaton / Cutler-Hammer KD series is a K-Frame molded case circuit breaker rated for 800A frame size and 600VAC operation. KD breakers cover the 70A to 800A range for large motor protection, industrial distribution, and main switchboard applications.
Series Specifications
| Frame | K-Frame — 800A Frame |
|---|---|
| Amperage Range | 70A – 800A |
| Voltage | 600VAC |
| Poles | 2-Pole & 3-Pole |
| Interrupting Rating | 35kA @ 600V / 65kA @ 480V / 100kA @ 240V |
| Mounting | Bolt-On |
| Trip Type | Thermal Magnetic |
History and Replacement Context
The KD series originated with Cutler-Hammer and continued under the Eaton brand. The K-Frame 800A rating made it suitable for large industrial feeders and main distribution applications.
Typical Applications
- Large motor protection
- Industrial distribution
- Main switchboard applications
- Feeder circuit protection
- Industrial plant distribution
Available Catalog Numbers
- KD2300 — 300A, 2 pole, 600V
- KD2350 — 350A, 2 pole, 600V
- KD2400 — 400A, 2 pole, 600V
- KD3300 — 300A, 3 pole, 600V
- KD3350 — 350A, 3 pole, 600V
- KD3400 — 400A, 3 pole, 600V
- KD30400W — 400A, 3 pole, 600VAC
- KD3100 — 100A, 3 pole, 240VAC
- KD3125 — 125A, 3 pole, 240VAC
- KD3150 — 150A, 3 pole, 240VAC
- KD3175 — 175A, 3 pole, 240VAC
- KD3200 — 200A, 3 pole, 240VAC
- KD3225 — 225A, 3 pole, 240VAC
- KD3250 — 250A, 3 pole, 240VAC
- KD3300 — 300A, 3 pole, 240VAC
- KD3350 — 350A, 3 pole, 240VAC
- KD3400 — 400A, 3 pole, 240VAC
- KDB3100 — 100A, 3 pole, 600VAC
- KDB3125 — 125A, 3 pole, 600VAC
- KDB3150 — 150A, 3 pole, 600VAC