KYN61-40.5 armored removable AC metal-enclosed switchgear is an indoor complete set of power distribution equipment with three-phase AC 50Hz and rated voltage 40.5kV. It is used for power plant, small and medium-sized generator power transmission, power distribution of industrial and mining enterprises, and secondary substations of power systems, power transmission, and large high-voltage motor starting, etc., for control, protection, and monitoring. It has the interlock function to prevent the push-pull circuit breaker handcart with load, prevent the circuit breaker from being switched on and off by mistake, and to prevent the grounding switch from being switched on by mistake when the power is on.