Cast resin transformers

10 November 2010 Power Electronics / Power Management

Legrand manufactures a range of energy saving, cast resin transformers designed for the distribution of electrical power, energy co-generation, rectification and traction.

These transformers are used in diverse industries, including the mines and petrochemical sectors, warehousing, data centres, hotels and hospitals, as well as retail and commercial environments.

The transformers, which are manufactured by a Legrand subsidiary, EdM, feature non-flammable insulation liquids, self-extinguishing materials exempt of toxic gas emissions, reduced noise levels and low electromagnetic emissions. The units meet stringent international quality and safety specifications for installation in any environment, including severe conditions. 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 and primary rated voltage up to 36 kV.

Unlike oil transformers, these cast resin units can be installed inside buildings and do not require additional building structures. Rubber inserts alleviate the transmission of vibrations between core and windings, also reducing operating noise levels and absorbing thermal expansion of components. Sockets on the MV side adapt the primary voltage to the mains, which can be set with the transformer switched off. Class F insulating material, at 155°C allows for a temperature rise of 100°C and the epoxy resin insulation means low maintenance. The carriage of these units, which allow

safe movement, is pre-equipped for the mounting of IP reinforced enclosures.

Accessories include thermal sensors or thermistors, electronic units for temperature control and forced ventilation systems to increase transformer power in temporary overloads or at high environmental temperatures. Legrand can also supply MV terminations for plug-in connections, surge arrester kits and anti-vibrating supports. Protective enclosures, available with different degrees of protection – IP21, IP31 and IP23 – protect transformers from external environmental impacts and people from the risk of direct contact.

For more information contact Legrand, +27 (0)11 444 7971, [email protected], www.legrand.co.za

Further reading:

ABB’s Mission to Zero drives South Africa’s energy transition
ABB Electrification Products Power Electronics / Power Management
ABB Electrification is charting a bold path towards a net-zero future with its Mission to Zero programme, a blueprint that combines energy efficiency, electrification, and digital innovation to accelerate the transition to clean energy.

Read more...

---

Energy harvesting using a battery-less IoT system
NuVision Electronics Editor's Choice Power Electronics / Power Management
Energy Harvesting plays an essential role in the foundation of ambient IoT, a new generation of ultra-low power connected devices that operate by drawing energy from their environment instead of relying on traditional batteries.

Read more...

---

Driving power, defining performance
Future Electronics Power Electronics / Power Management
Vishay’s portfolio of inductors, current sense resistors, and MOSFETs provides a comprehensive solution for intelligent power management.

Read more...

---

Battery simulator module simplifies BMS testing
Test Dynamics Power Electronics / Power Management
The PXI/PXIe solution from Pickering Interfaces offers a scalable, modular design for faster development cycles, lower total cost of ownership, and improved safety.

Read more...

---

DC PSU: The cornerstone for efficient solar-storage systems
Vepac Electronics Power Electronics / Power Management
PV energy storage systems are evolving and DC power supplies, with their technical characteristics that are naturally compatible with new energy, have become a key carrier for improving system energy efficiency.

Read more...

---

Why local manufacturing, maintenance and support are key to the success of South Africa’s energy future
Power Electronics / Power Management
Although new renewable generation capacity is being developed, the current transmission infrastructure may not fully support the connection of these sources to the national grid or adequately deliver power to areas of high demand.

Read more...

---

Converter power modules for 48 V networks
Altron Arrow Power Electronics / Power Management
The economic and quality-of-life benefits of electrification is driving the adoption of HV to 48 V DC-DC conversion across many markets with 48 V power modules becoming more common.

Read more...

---

The importance of power integrity
Spectrum Concepts Power Electronics / Power Management
[Sponsored] Behind every high-speed system lies the need for power integrity. Without it, even the cleanest signal paths become compromised.

Read more...

---

Precise multi-vital sign monitoring
Future Electronics Power Electronics / Power Management
The AS7058 by ams OSRAM is an integrated multi-vital sign monitoring device, which provides a complete photoplethysmogram, electrocardiogram, body impedance sensor, and electrodermal activity sensor.

Read more...

---

Automotive battery diagnostics tester
Comtest Power Electronics / Power Management
Midtronics’ MVT handheld battery tester is a revolutionary tool, powered by MDX-AI, which is set to redefine the standards of battery diagnostics and testing in the automotive industry.

Read more...

---