Siemens HND N-Frame Hi-Break Circuit Breakers
The Siemens HND series is an N-Frame 1200A Hi-Break molded case circuit breaker rated for 600V and 85kA interrupting capacity at 480V. Available in 3-pole configuration from 400A to 1200A for large commercial and industrial main breaker applications.
Series Specifications
| Frame | N-Frame 1200A Hi-Break — 1200A Frame |
|---|---|
| Amperage Range | 400A – 1200A |
| Voltage | 600VAC |
| Poles | 3-Pole |
| Interrupting Rating | 85kA @ 480V |
| Mounting | Bolt-On |
| Trip Type | Electronic Trip |
History and Replacement Context
The Siemens HND Hi-Break series provides higher interrupting capacity than the standard ND frame for main breaker applications in high-fault industrial environments.
Typical Applications
- Large commercial main breakers
- Industrial switchboard mains
- Large feeder protection
- Service entrance equipment