KYN61-40.5 (Z) armored removable AC metal-enclosed switchgear (hereinafter referred to as switchgear) is a three-phase AC 50Hz, rated voltage 40.5kV indoor complete power distribution device. It is used for receiving and distributing electric energy in power plants, substations and industrial and mining enterprises, and has functions such as control, protection and monitoring of circuits. It can also be used in places with frequent operations. This switchgear complies with standards such as GB3906-2006, GB/T11022-1999 and DL/T404-2007. KYN28A-12 armored removable metal-enclosed switchgear is suitable for 3.6-12kV three-phase AC 50Hz power grids, as a means of receiving and distributing electric energy, and controlling, monitoring and protecting circuits. It can be used for single busbar, single busbar segmented system or double busbar system. The switchgear complies with the requirements of 1EC298 "AC metal-enclosed switchgear and controlgear with rated voltage above 1kV and below 52kV", EC694 "Common terms for high-voltage switches and controlgear", my country's GB3906 (3-35kV AC metal-enclosed switchgear) and D1A04 "Ordering conditions for indoor AC high-voltage switchgear", Germany's DN.VDE0670 "AC switchgear with rated voltage above kV" and other standards. It also has a complete and reliable anti-misoperation function.