1.3.6kv 6kv 7.2kv 10.5kv 21kv 22kv 33kv is the prompt 2.a block system, must match the electromagnetism lock. Speciication:1.Product name: Indoor high voltage charged display device2.Composed of three sensors and display(through lead connection)3.It is applied to certain indoor high volt electric equipment of rated frequency 50Hz and rated volt below 40.5KV4.By this device, it could indicate charged condition in circuit, besides, it can be coordinate operated with electromagnetic lock,which realizes forced lockout of switch handle and controlled by one high volt signal5.Its circuit system is standalone and not interfered one another.Just needing the high volt circuit electrified,even if display circuit and latching circuit arise fault simultaneously,the electromagnetic lock still stay in locking state,which could prevent from mishandle or entering into charged spacing 

High voltage electric charge display device in switchgear