Product Overview
SAI provides a comprehensive portfolio of low voltage switchgear solutions engineered and manufactured to meet stringent NEMA and UL standards. Designed for maximum flexibility, SAI switchgear can be configured with circuit breakers, protective relays, metering, and control components from all major industry‑leading manufacturers. Each freestanding switchgear lineup features fully segregated, metal‑enclosed compartments that isolate breakers, busbars, and cable termination sections enhancing safety, reliability, and ease of maintenance across commercial, industrial, and utility applications.
Technical Specifications
- Voltage: Up to 1000V
- Ampacity: Up to 10,000A
- Short Circuit Rating: Up to 100kA
- Breakers: UL 1066 Draw out
- Agency Listing: UL1558, cUL and ANSI
- Access: Front and Rear
- Seismic Information: IBC 2015 and CBC 2016 certified and tested
- Cable Entry: Top or bottom
Benefits
UL1558 is the recognized safety and performance standard for low voltage metal-enclosed switchgear used in critical power distribution systems. Switchgear built to UL 1558 specifications delivers enhanced reliability, safety, and scalability for demanding electrical environments.
Superior Safety and Arc Mitigation
UL1558 switchgear features metal‑enclosed construction with fully isolated compartments for circuit breakers, bus systems, and cable terminations. This sectionalized design helps:
- Reduce exposure to live components
- Improve containment of electrical faults
- Support arc‑resistant designs (when specified)
This makes UL1558 ideal for facilities where personnel safety and system integrity are top priorities.
High Fault Withstand and Performance Ratings
UL1558 switchgear supports high short‑circuit withstand ratings, commonly up to 100 kAIC, making it well‑suited for large electrical infrastructures with high available fault currents.
Its robust bus bracing and enclosure design ensure long‑term mechanical and electrical performance under extreme operating conditions.
Custom Configurations and System Flexibility
Unlike more compact switchboard solutions, UL1558 switchgear offers:
- Custom lineup lengths
- Multiple breaker frame sizes
- Integration of protective relays, metering, controls, and communications
- Compatibility with breakers from leading manufacturers
This flexibility allows engineers to design application‑specific power distribution systems without compromise.
Enhanced Maintainability and Serviceability
With fully compartmentalized construction, UL1558 switchgear allows:
- Safer maintenance while adjacent sections remain energized
- Easier troubleshooting and component replacement
- Reduced downtime for critical operations
This results in lower lifecycle costs and improved system availability.
Compliance with Codes and Industry Requirements
UL1558 switchgear is engineered to comply with:
- UL and NEMA standards
This simplifies approvals for projects requiring code‑compliant electrical distribution equipment.