LA/LH Mission Critical Circuit Breakers
This is a legacy product
Discontinued
Overview
Features
The LA High Magnetic Withstand Circuit Breaker utilizes higher magnetic trip levels and trips at 18–20× the handle rating. The LA high magnetic withstand circuit breaker allows the downstream branch circuit breaker which is upstream from the fault and nearest to the fault to clear the fault.
The LA/LH mission critical circuit breakers deliver high-magnetic withstand capabilities in the simplicity of a basic thermal-magnetic breaker design. Fixed settings designed to deliver tested coordination levels take the guess work out of installation and maintenance. Fully-coordinated systems are possible downstream of Square D brand transformers from 15 kVA to 225 kVA when the LA or LH mission critical circuit breaker is applied with the QO(B) family of branch breakers.
Features
Ratings
- UL489 listed
- CSA certified
- Voltage: dual-rated for 480 Y/277 V and 208 Y/120 V
- Handle Ratings: 200 A – 400 A
- Selective coordination rating: Reference Appendix B in Data Bulletin 0100DB0501 Short Circuit Selective Coordination for Low Voltage Circuit Breakers for a full listing
Available configurations
- I-Line panel construction
- Main breaker in NQ and NF panel construction
- Unit mount for OEM users
Cost-effective alternative to electronic circuit breakers
Factory preset magnetics take the guesswork out of breaker adjustments
Easy customization with the most commonly used accessories available for factory or field installation, including shunt trips, under voltage, auxiliary switches, bell alarm and terminations
Product Details:
Standard Interrupting
LAL34200MC - 200A, AC Mag. level hold 3400A trip 4000A
LAL34225MC - 225A, AC Mag. level hold 3825A trip 4500A
LAL34250MC - 250A, AC Mag. level hold 4250A trip 5000A
LAL34400MC - 400A, AC Mag. level hold 6000A trip 7200A
High Interrupting
LHL34200MC - 200A, AC Mag. level hold 3400A trip 4000A
LHL34225MC - 225A, AC Mag. level hold 3825A trip 4500A
LHL34250MC - 250A, AC Mag. level hold 4250A trip 5000A
LHL34400MC - 200A, AC Mag. level hold 6000A trip 7200A
The LA/LH mission critical circuit breakers deliver high-magnetic withstand capabilities in the simplicity of a basic thermal-magnetic breaker design. Fixed settings designed to deliver tested coordination levels take the guess work out of installation and maintenance. Fully-coordinated systems are possible downstream of Square D brand transformers from 15 kVA to 225 kVA when the LA or LH mission critical circuit breaker is applied with the QO(B) family of branch breakers.
Features
Ratings
- UL489 listed
- CSA certified
- Voltage: dual-rated for 480 Y/277 V and 208 Y/120 V
- Handle Ratings: 200 A – 400 A
- Selective coordination rating: Reference Appendix B in Data Bulletin 0100DB0501 Short Circuit Selective Coordination for Low Voltage Circuit Breakers for a full listing
Available configurations
- I-Line panel construction
- Main breaker in NQ and NF panel construction
- Unit mount for OEM users
Cost-effective alternative to electronic circuit breakers
Factory preset magnetics take the guesswork out of breaker adjustments
Easy customization with the most commonly used accessories available for factory or field installation, including shunt trips, under voltage, auxiliary switches, bell alarm and terminations
Product Details:
Standard Interrupting
LAL34200MC - 200A, AC Mag. level hold 3400A trip 4000A
LAL34225MC - 225A, AC Mag. level hold 3825A trip 4500A
LAL34250MC - 250A, AC Mag. level hold 4250A trip 5000A
LAL34400MC - 400A, AC Mag. level hold 6000A trip 7200A
High Interrupting
LHL34200MC - 200A, AC Mag. level hold 3400A trip 4000A
LHL34225MC - 225A, AC Mag. level hold 3825A trip 4500A
LHL34250MC - 250A, AC Mag. level hold 4250A trip 5000A
LHL34400MC - 200A, AC Mag. level hold 6000A trip 7200A
Applications
- Emergency Power Systems
- Commercial Buildings
- Industrial Buildings
- Selective Coordination
- Healthcare Facilities
- Data Centers