Sabre ring main units are designed for secondary distribution networks up to 24kV. The range is an ideal solution for indoor/outdoor compact substations and is available in non-extensible, extensible and modular formats to suit various application requirements. Ring Main Units (RMU s) and Medium Voltage (MV) Switchgear are crucial in MV power distribution. Globally, they each hold about half the market share. These monitoring solutions track critical parameters including partial discharge activity, contact. As a new type of power supply main line, Busways truncking has been widely used in power distribution design and a lot of tall buildings and large workshops. The installed base of SafeLink CB is more than 10000 switchgears in more than 20 countries all over the world.