MEDIUM VOLTAGE SOLUTIONS THAT ARE BUILT TO LAST

NHP’s medium voltage (MV) products and solutions include a range of switchgear manufactured in Belgium by its quality manufacturing partner Switchgear Company (SGC), transformers manufactured in Italy by Trafo Elettro, and customised kiosk solutions manufactured in Australia by NHP.

The MV switchgear is high quality and packed with safety features. The range consists of the DF-2 and DF-2+ air insulated panels and the DR-6 and DR6+ gas insulated RMUs.

NHP’s MV transformers include both cast resin and oil immersed types, which can be supplied enclosed or unenclosed. NHP can also customise kiosk solutions, including full MV/LV kiosks, outdoor enclosed MV switchgear substations and outdoor rated enclosed transformers.

Coupled with a local, experienced, customer centric team of MV experts, NHP excels at providing project solutions that focus on safety for people, reliability of product, availability of power, compliance to standards, and customisation of solutions to meet customer needs.

Features and benefits of NHP’s medium voltage range include:

♦ ‘Arc-Killer’ quenching system quenches an arcing fault in less than 50ms

♦ Visible earth switch and in line isolation

♦ Highest levels of safety when testing cables

♦ Cast resin transformers with arc mitigation by design which reduce the risk of fire

♦ No need to externally vent arc fault gasses

♦ Switchgear with a 50-year design life

♦ Modern vacuum switching and load break technology

♦ Proven performance

♦ Sets a new standard for reduced partial discharge

♦ Most advanced method in HV winding fabrication

♦ Environmental and climate class tested

NHP’s DF-2+ MV air insulated switchgear (AIS) panels feature a unique arc quenching system called the ‘Arc-Killer’, which can quench an arcing fault in less than 50ms. Such a fast arc fault clearance rate not only protects people from danger but also protects the switchgear panels from damage, ensuring maximum power availability.

Furthermore, the DF-2+ panels include a visual earth switch to provide maximum safety for electrical operators and maintenance staff. DF-2+ switchgear panels have achieved a substantial install base over the last ten years, becoming the product of choice in many applications including airports, water treatment plants, defence, mining, hospitals, food and beverage, manufacturing and many more.

The DF-2+’s modular design allows simple and custom-made combinations of MV cubicles to be created, which are suitable for primary and secondary MV applications. The combination of cubicles is unlimited, so very complex diagrams of distribution and transformer switchgear can be compiled through the endless spectrum of possibilities.

Most MV switchgear on the market today will offer an ‘A-FL’ internal arc classification. This means the ‘safe’ boundary to the front and lateral side of the panel is 300mm. Obviously for HV operators or maintenance staff, this is not a practical working distance.

However, DF-2+ panels have an internal arc classification (IAC) to category B, FLR 20kA 1 s. (F = frontal, L = lateral, R = rear) which provides a safe working boundary of 100mm. As a result, the operator is protected against the consequences of an arc, whether they stand in front of the switchboard, next to it or behind it, allowing a truly practical working distance.