Legrand strengthens high-efficiency UPS offering

Electrical Power & Protection

March 2026 Electrical Power & Protection

Legrand SA’s next-generation Keor DK single-phase uninterruptible power supply (UPS) has been designed to deliver high levels of power continuity, efficiency, and operational flexibility in technical and infrastructure installations where consistent power quality is essential. The Keor DK range, with ratings from 1 to 20 kVA, is available in both tower and rack versions. For flexibility, it operates with VRLA or lithium batteries.

This energy-efficient system has been developed around high-frequency PWM and online double-conversion technology. The design provides continuous isolation between the mains supply and connected loads, ensuring stable output during disturbances like voltage fluctuations, transients and outages. A unity output power factor (kVA = kW) enables full real power availability, while advanced AC-AC technology achieves an efficiency of up to 96%, rising to 98% in advanced Eco Mode. These features contribute to lower operating costs, reduced energy losses and minimal environmental impact.

Keor DK offers users maximum adaptability for safe installation and dependable performance in different electrical infrastructures. Smaller models up to 10 kVA feature a convertible rack or tower design, while higher-capacity versions are available in 48 cm rack configurations up to 20 kVA. Multiple input and output wiring options allow the system to accommodate single- or three-phase supplies, depending on site requirements.

For user-friendly operation, a colour touchscreen interface with an integrated gravity sensor allows automatic screen rotation to suit specific requirements. Communication and monitoring capabilities include USB, RS232, and network interfaces, while embedded dry contacts and emergency power-off functionality integrates easily into other site safety and control systems. Parallel operation is supported on selected models, enabling redundancy or capacity expansion where higher availability is required.

Battery flexibility is another key design advantage. The Keor DK range is available with both VRLA and lithium battery technologies, with internal and external battery cabinet options.

High-capacity internal chargers enable faster recharge times. This is particularly important in applications where rapid recovery after power events is critical. The Keor DK system is also compatible with generators, ensuring continuity during extended outages.

In line with Legrand’s global sustainability strategy, this UPS system has been developed using eco-design principles focused on efficiency, durability and recyclability. Environmental product declarations and lifecycle assessments form part of the company’s product development process. The Legrand team offers technical assistance, commissioning, testing, and maintenance services throughout southern Africa to ensure operational continuity, reliability, safety and extended service life in every system .

In addition, the online site configurator www.ups.legrand.com assists with the selection of the correct UPS, by providing easy power selection and calculation of the necessary back-up time required.

For more information contact Legrand SA, +27 11 444 7971, [email protected], www.legrand.co.za

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Electrical Power & Protection

Legrand strengthens high-efficiency UPS offering

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