Siemens HLD L-Frame Hi-Break Circuit Breakers
The Siemens HLD series is an L-Frame 600A Hi-Break molded case circuit breaker rated for 600V and 65kA interrupting capacity at 480V. Available in 3-pole configuration from 125A to 600A for large commercial and industrial feeder protection.
Series Specifications
| Frame | L-Frame 600A Hi-Break — 600A Frame |
|---|---|
| Amperage Range | 125A – 600A |
| Voltage | 600VAC |
| Poles | 3-Pole |
| Interrupting Rating | 65kA @ 480V |
| Mounting | Bolt-On |
| Trip Type | Thermal Magnetic |
History and Replacement Context
The Siemens HLD Hi-Break series provides higher interrupting capacity than the standard LD frame for large feeder applications in high-fault environments.
Typical Applications
- Large commercial feeder circuits
- Industrial distribution
- Motor control center mains
- Switchboard feeders