UL 891

Name: "UL 891"
Rating: 5 (702 reviews)

SKU: 860734286X

Model: FP-LSB

Product Details

Product Specification

Type	Main Incoming Switchboard Feeder Switchboard Distribution Switchboard Service Entrance Switchboard Metering Switchboard Generator Switchboard Automatic Transfer Switchboard	Model	FP-LSB
Params	1. Model Range & Access Configurations The product portfolio consists of four models with differentiated access designs. FP-LSB1-I and FP-LSB1-G provide mainly front access; FP-LSB2-I is designed for rear-only access; FP-LSB2-G supports both front and rear access for flexible operation and maintenance. 2. Current Ratings of Switching Devices For main circuit devices, the ACB rating covers 800–4000 A for the LSB1 series and 800–6000 A for the LSB2 series; the main MCCB is rated 800–1200 A and is only available on the FP-LSB1-I model. For feeder circuit devices, the ACB follows the same rating range as the main circuit, while feeder MCCBs cover 800–1200 A on FP-LSB1-I, and 100–1200 A on both FP-LSB1-G and FP-LSB2-G. 3. Electrical Performance All models deliver a short-circuit withstand current of up to 100 kA at 480 V. The main busbar ampacity (lug type) reaches up to 4000 A for the LSB1 series and up to 6000 A for the LSB2 series. The rated operating voltage for the full product line is up to 480 V. 4. Installation Flexibility All configurations support both top and bottom cable entry, adapting to various on-site wiring requirements. 5. Enclosure Width Specifications For MCCB frames (800–1200AF), the enclosure width is 26 inches for FP-LSB1-I, and 42/50 inches for FP-LSB1-G and FP-LSB2-G. For ACB_D frames (800–1600AF), the width measures 26 inches for FP-LSB1-I, 42/50 inches for FP-LSB1-G, 32 inches for FP-LSB2-I, and 42/50 inches for FP-LSB2-G.	Material	Enclosure High-strength galvanized steel or cold-rolled steel, with a durable protective coating for mechanical strength and corrosion resistance. Busbars High-conductivity copper or aluminum busbars, sized according to rated current and short-circuit requirements. Circuit Breakers & Switching Components UL-listed circuit breakers, switches and protective devices selected according to system configuration and electrical ratings. Insulation Components High-performance insulating materials, including molded insulation components, barriers and supports. Cable & Terminal Components Copper or aluminum terminals, lugs and cable connection components suitable for the specified current rating. Internal Structural Components Reinforced steel mounting structures, barriers, supports and partitions designed for reliable mechanical and electrical performance.
Applicable Industry	Data Centers Commercial Buildings Industrial Facilities Healthcare Facilities Infrastructure Projects Renewable Energy Solar PV、Wind Power Oil & Gas Utilities Critical Facilities

Feature

01 | UL 891 Compliance Designed and manufactured to meet the applicable requirements of UL 891 for low-voltage switchboards. 02 | High Current Capacity Available with configurations tailored to project-specific voltage, current and short-circuit withstand requirements. 03 | Robust Busbar System High-conductivity copper or aluminum busbars provide reliable current distribution and optimized thermal performance. 04 | Flexible Configuration Main breakers, feeder breakers, metering sections, distribution sections and other functional units can be configured according to project requirements. 05 | Enhanced Safety Internal barriers, insulation systems and properly coordinated protection devices help improve operator and equipment safety. 06 | High Short-Circuit Withstand Reinforced busbar supports and structural components are designed to withstand mechanical and thermal stresses under specified fault conditions. 07 | Easy Maintenance Front-accessible components and clearly organized internal layouts facilitate inspection, maintenance and component replacement. 08 | Application Flexibility Suitable for commercial, industrial, data center, renewable energy and infrastructure power distribution systems.

UL891