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The power must flow

Legrand’s power solutions ensure protection of electrical equipment and continuity of service during planned and unexpected power outages.

“These modular systems include certified low emission (CLE) cast resin transformers, busbar trunkings, enclosures for power switchgear and controlgear assemblies, as well as uninterruptible power supply (UPS) units,” states Marc Naidoo, projects and technical co-ordinator, Legrand SA. “An important advantage of selecting Legrand components for efficient, safe and flexible power distribution, is the immediate integration between the company’s busbar trunking systems, cast resin transformers and XL³ cabinets.”

Legrand’s environmentally friendly, dry type cast resin transformers, transfer electrical power between two different voltage systems at the same frequency, with low environmental impact. These HV/LV transformers offer significant savings on electricity costs and can reduce electricity consumption by up to 20% during off-peak activity.

The absence of flammable insulation liquids, the use of self-extinguishing materials exempt of toxic gas emissions, reduced noise levels and low electromagnetic emissions, ensure enhanced environmental protection in all installations.

Legrand’s standard distribution transformers have rated power between 100 and 3150 kVA, primary rated voltage up to 36 kV and secondary rated voltage up to 433 V. Special transformers have rated power up to 20 000 kVA, primary rated voltage up to 36 kVA and secondary rated voltage on request.

Unlike oil transformers, these cast resin units, with reduced overall size dimensions, can be installed inside buildings and do not require additional building structures. This means optimum flexibility in any environment. Because no cooling fluids are necessary, maintenance costs are minimised.

For climate conditions these transformers can withstand severe conditions – E2 – environmental class, C2 – climatic class, F1-fire-behaviour class. Legrand transformers are enhanced by pre-fabricated busbar trunking systems, which provide synergy for a direct connection.

These busbar trunking systems, with minimum overall dimensions, provide flexibility in all areas of an installation, including confined spaces. Aluminium or copper busbars and cast resin transformers are equipped with various accessories to provide maximum versatility for any type of power application, including areas which are subjected to high thermal stress and where equipment is sensitive to electromagnetic interferences.

Safety is important in the design of all Legrand components. The absence of fuel masses in Legrand’s cast resin transformers is combined with a low fire load typical of busbars. This feature increases the intrinsic safety of a building against the propagation of a possible fire. This fire retardant range is tested for fire resistance according to DIN 4102-09 and EN 1366-3 standards.

The connections of high power busbar line elements have reliable mechanical interlocks for easy installation. This design eliminates errors and prevents potential dangers which can occur with conventional systems when starting up the system.

There are other critical Legrand devices for optimum protection, reliable distribution and effective service continuity in the event of a mains power failure. These include DMX³ air circuit breakers, DMX³ MCCB’s, supply inverters, isolating switches and XL³ enclosures for sites between 160 A and 6 300 A. XL³ distribution enclosures comply with every part of the standard IEC 61439 to guarantee reliability and total protection of the installation.

Legrand’s UPS system also ensures continuity of service, in terms of power and back up time. Optimum sizing of power stages, the latest electronic components and thorough testing of each unit, ensure dependability and safety of the new system. High performance batteries and an efficient charging system have extended battery life by up to 50%.

This UPS system encompasses three ranges – the Modular series for a power supply up to 120 kVA, the Conventional series up to 10 kVA and the Line Interactive series, which is a UPS system up to 3 kVA.

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