Electrical Power & Protection

Legrand’s solutions for power ­outages

October 2017 Electrical Power & Protection

Legrand’s power solutions ensure continuity of service and protection of electrical equipment during planned and unexpected power outages. These modular systems include cast resin transformers, with low electromagnetic emission, busbar trunking systems, enclosures for power switchgear and controlgear assemblies, as well as uninterruptible power supply (UPS) units. All solutions encompass the latest technology for energy efficiency, quality of power supply, optimum safety and enhanced aesthetics.

The busbar trunking systems (25 A–6300 A) comply with international IEC 61439-6 standards and have minimum overall dimensions to provide flexibility in all areas of an installation, including confined spaces. Resin busbars, with an IP68 index protection rating, are suitable for high-power outdoor projects.

Aluminium or copper busbars and cast resin transformers are equipped with various accessories to provide maximum versatility for any type of power application, including zones which are subjected to high thermal stress and where equipment is sensitive to electromagnetic interferences.

Safety features and efficiency

Safety is important in the design of all Legrand components. The absence of fuel masses in the 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.

The 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 range of 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 kV and secondary rated voltage on request.

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. 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.

Enclosures and cabinets

Legrand’s range of XL³ modular power distribution enclosures complies with international IEC 61439 standards to guarantee reliability and total protection of the installation.

These cabinets and enclosures – for sites between 160 A and 6300 A – provide solutions adapted to meet exact site power distribution needs in industrial, commercial and residential environments. Each model in this range includes a selection of sizes, versions and equipment. Metallic or plastic enclosures are available with index protection ratings between IP30 and IP55 and short circuit resistance from 20 kA to 110 kA.

This flexible power distribution system, which can be adapted at any time, includes either standard or optimised distribution. Standard distribution allows the user to choose busbars and their supports, with a personal configuration for efficient power distribution.

The optimised distribution system eliminates the need to create special connections upstream and ensures time savings during installation by being able to connect appliances on pre-equipped units.

Legrand’s UPS systems ensure 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%. The range, which goes up to 800 kVA, comprises modular and conventional

systems to guarantee superior performance, service continuity and energy efficiency to critical loads.

For more information contact Legrand SA, +27 (0)11 444 7971, legrand.south-africa@legrand.co.za, www.legrand.co.za


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