UL/CE Certified Products
UL 891 Low Voltage Switchboard
Product Overview
The UL 891 Low-Voltage Switchboard is engineered for reliable power distribution in commercial, industrial, and mission-critical facilities. Fully compliant with the U.S. National Electrical Code (NEC) and applicable safety standards across the United States and Canada, this standard rigorously defines the design, construction, and performance requirements for switchboards, ensuring superior reliability and safety when accommodating high current loads and withstanding severe short-circuit conditions. As a centralized main distribution assembly, the UL 891 Switchboard provides comprehensive power control and protection for downstream feeders, making it especially well-suited for power distribution for data center applications, where continuous availability, fault resilience, and system integrity are non-negotiable.
| Standards
• UL 891 Standard for Safety Switchboards
| Technical Specifications
The iWDS low-voltage switchgear manufactured by Shanghai Infraswin Energy complies with UL891, CSA22.2 NO.244, NEMA PB-2, and NEMA 1 enclosure standards. Circuit breakers use UL489- or UL1066-certified breakers.
| Features
- Compact size
- Easy installation with very short on-site installation time
- Tested to UL891 and certified for the U.S. and Canada
- Feeder current ratings: 100A, 150A, 250A, 400A, 600A, 800A, 1000A, and 1200A
- System voltages: 120/240, 208Y/120, and 480Y/277 AC
- Systems: 1Ø3W or 3Ø3W or 3Ø4W or 3Ø5W
- AC breaker frames can reach 65 kA at 690 VAC and 100 kA at 480 VAC without fuse components
- NEMA 1 protective enclosure
- Full-height add-on or standalone distribution section
- High-conductivity copper busbar provided
- Busbar interconnection between sections
- Independent feeder device up to 1200A
- Micrologic trip breakers used as main or feeder switches
- Ample space for breakers (single feeder cabinet up to 10 MCCB circuits; cabinet height up to 90 in / 2286 mm)
- Feeder compartment heights: 100A 6.9 in (177 mm); 150-250A 8.7 in (222 mm); 400-600A 10.5 in (267 mm); 800-1200A 12.2 in (311 mm)
- Continuous copper ground bus
| Incomer Cabinet Sizing
| No. | Rated Current | Poles | Width | Depth | Height |
|---|---|---|---|---|---|
| 1 | 1000A | 3P | 30" (762) | 26" (661) | 90" (2286) |
| 2 | 1600A | 3P | 30" (762) | 26" (661) | 90" (2286) |
| 3 | 2000A | 3P | 30" (762) | 26" (661) | 90" (2286) |
| 4 | 2500A | 3P | 30" (762) | 26" (661) | 90" (2286) |
| 5 | 3200A | 3P | 40" (1016) | 36" (915) | 90" (2286) |
| 6 | 4000A | 3P | 40" (1016) | 36" (915) | 90" (2286) |
| 7 | 5000A | 3P | 40" (1016) | 40" (1016) | 90" (2286) |
| Feeder Cabinet Sizing
| No. | Rated Current | Poles | Width | Depth | Height |
|---|---|---|---|---|---|
| 1 | 100A-630A | 3P | 30" (762) | 26" - 40" (661-1016) | 90" (2286) |
| 2 | 800A-1200A | 3P | 36" (915) | 26" - 40" (661-1016) | 90" (2286) |
| Foundation Opening Layout
| Incomer Cabinet Cutout Dimensions
| No. | Rated Current | A | B | C | D | E | F | J | K |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 1000A | 22.2" (565) | 24.2" (615) | 26" (661) | 26" (661) | 28.1" (715) | 30" (762) | 5.9" (150) | 18.7" (475) |
| 2 | 1600A | 22.2" (565) | 24.2" (615) | 26" (661) | 26" (661) | 28.1" (715) | 30" (762) | 5.9" (150) | 18.7" (475) |
| 3 | 2000A | 22.2" (565) | 24.2" (615) | 26" (661) | 26" (661) | 28.1" (715) | 30" (762) | 5.9" (150) | 18.7" (475) |
| 4 | 2500A | 22.2" (565) | 24.2" (615) | 26" (661) | 26" (661) | 28.1" (715) | 30" (762) | 5.9" (150) | 18.7" (475) |
| 5 | 3200A | 32.2" (819) | 34.2" (869) | 36" (915) | 36" (915) | 38.2" (969) | 40" (1016) | 15.9" (404) | 28.7" (729) |
| 6 | 4000A | 32.2" (819) | 34.2" (869) | 36" (915) | 36" (915) | 38.2" (969) | 40" (1016) | 15.9" (404) | 28.7" (729) |
| 7 | 5000A | 36.2" (920) | 38.2" (970) | 40" (1016) | 36" (915) | 38.2" (969) | 40" (1016) | 15.9" (404) | 28.7" (729) |
| Feeder Cabinet Cutout Dimensions
| No. | Rated Current | A | B | C | G | H | I | L | M |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 100A-630A | 22.2"-36.2" (565-920) | 24.2"-38.2" (615-970) | 26"-40" (661-1016) | 26" (661) | 28.1" (715) | 30" (762) | 14.8"-28.7" (375-730) | 4.9" (125) |
| 2 | 800A-1200A | 22.2"-36.2" (565-920) | 24.2"-38.2" (615-970) | 26"-40" (661-1016) | 32" (814) | 34.2" (869) | 36" (915) | 14.8"-28.7" (375-730) | 4.9" (125) |
| Certificate
Company Address
No. 720 Yuandong Road, Fengxian District, Shanghai, China
Phone/WeChat/WhatsApp
+86-19101772387