Eaton 843PMURF LV Unipak Capacitor Bank - UL Listed
Part Number: 843PMURF
Quick Summary
The Eaton 843PMURF LV Unipak capacitor bank is designed to improve power factor in three-phase, 480 V industrial distributions. Operators commonly face motor inefficiency, voltage drop, and utility penalties when PF drifts. UL Listed and CSA Certified protection, along with a rugged NEMA enclosure and clear neon fuse indicators, help meet safety and reliability requirements. In practice, this unit supports fast reactive power correction in low-voltage systems, delivering measurable efficiency gains and reduced demand charges. Secondary benefits include robust fault indication, comprehensive fusing, and compatibility with A1 frame installations. This makes it suitable for light to moderate industrial applications, including packaging, manufacturing lines, and process controls, with minimal tuning.
Product Information
Extended Description
843PMURF Eaton: Eaton LV Unipak capacitor bank, UNIPAK, Low Voltage Fixed Capacitor Banks, 9.6A, 480V, Three-phase, 8 kVAR, Protected, Neon red blown-fuse indicating lights, Three midget-type fuses, A1 Frame
Product Name
Eaton LV Unipak capacitor bank
Catalog Number
843PMURF
UPC
782116058624
Product Length/Depth
5.254 in
Product Height
17.3 in
Product Width
8.5 in
Product Weight
20 lb
Warranty
Eaton Selling Policy 25-000, one (1) year from the date of installation of the Product or eighteen (18) months from the date of shipment of the Product, whichever occurs first.
Certifications
UL Listed CSA Certified
Catalog Notes
Multiply the 240V kVAR rating by 0.75 to calculate the kVAR value at 208V.
Type
UNIPAK
Amperage Rating
9.60A
Fuse type
Three midget-type fuses with 100,000 ampere interrupting capacity
Phase
Three-phase
Product Category
Low Voltage Fixed Capacitor Banks
Voltage rating
480 V
Enclosure
NEMA 1, NEMA 3R
Enclosure material
14 gauge steel finished with durable powder coat finish
Frame size
A1
Indicators
Red, neon blown-fuse indicating lights are protected by transparent weatherproof guard
Protection
Three fuses, three lights
Rating
8 kVAR
The 843PMURF delivers 8 kVAR of reactive power at 480 V with a 9.60 A operating current, enabling rapid PF correction for three-phase feeders. This results in reduced utility penalties, less voltage drop along feeders, and smoother motor starts that extend bearing life in pumps, fans, and conveyors. The bank fits neatly into switchgear enclosures and control panels, offering a compact A1 frame that supports scalable layouts in new builds and upgrades. Robust protection starts with three midget-type fuses rated at 100,000 AIC and neon fuse indicators, improving fault visibility and minimizing unscheduled downtime. The NEMA 1/NEMA 3R enclosure options provide durable indoor and outdoor installation, while 14-gauge steel and powder coating maximize corrosion resistance in harsh environments. Catalog notes aid planning when voltage conditions shift between 240, 208, and 480 V, facilitating straightforward PF strategy expansion. Finally, UL Listed and CSA Certified compliance underpins quality, with Eaton’s one-year warranty reinforcing long-term support and predictable maintenance.
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FAQs
Begin with confirming a compatible A1 frame mounting within a panel or switchgear enclosure rated for 480 V three-phase service. Connect to the three-phase bus, ensuring correct phasing and proper alignment with the enclosure’s NEMA rating (1 or 3R as configured). Install the three midget-type fuses and verify neon indicator lights. Follow the included Eaton specification sheet for wiring diagrams, torque specs, and safety clearance. After installation, test the PF correction with a power quality meter to confirm stable operation and no overcurrent conditions.
The unit provides 8 kVAR of reactive power at 480 V with a 9.60 A amperage rating. This enables significant PF correction on typical three-phase loads such as pumps, fans, and conveyors, reducing voltage drop and improving motor efficiency. The three fuses offer protective redundancy with a 100,000 AIC rating, while the neon indicators aid quick fault detection. Use this bank where steady PF improvement and reliable protection are required in industrial facilities.
Yes, it is designed for three-phase, low-voltage applications and provides reactive power support to improve PF in motor-driven systems. For harmonic-rich environments, pair it with appropriate harmonic mitigation strategies and ensure the enclosure and wiring are sized for the anticipated inrush and current levels. The A1 frame and NEMA-rated enclosure support integration with standard switchgear and motor control centers used in manufacturing and process industries.
The 843PMURF is UL Listed and CSA Certified, underscoring safety and field reliability. It offers NEMA 1 and NEMA 3R enclosure options, providing indoor and outdoor protection, respectively. These certifications and ratings help meet electrical codes and procurement requirements for industrial facilities, reduce risk during audits, and support maintenance planning with clearly defined safety features and indicators.
Maintenance is minimized by a robust fuse-and-indicator design and a durable steel enclosure, with Eaton’s one-year warranty (per policy 25-000) supporting long-term reliability. ROI comes from improved power factor, reduced demand charges, and extended motor life due to smoother starts. The product’s scalable A1 frame and UNIPAK family compatibility simplify future upgrades and expansion without redistributing existing hardware.