Safety interlock device and safety interlock system

Abstract

Embodiments of the present application provide a safety interlock device and a safety interlock system. The safety interlock device is installed in a lock box corresponding to a high-voltage cabinet; the high-voltage cabinet includes a switch module and is connected to at least one high-voltage load through a control circuit, and the high-voltage The key corresponding to the cabinet is the only key to open the at least one high-voltage load; the device includes: a connecting piece, a keyhole unit and a locking component; the communication component and the locking component are respectively connected to the control circuit; when the above key is located in the keyhole unit, The connecting component is used to connect the control circuit; when the control circuit is connected and the switch module is in the closed state, the locking component is used to lock the key; when the lock hole unit is empty, the connecting component is used to disconnect the control circuit, and the locking component is used to to unlock the key. Compared with the prior art, the present application can realize the interlock protection between the high-voltage switchgear and the high-voltage load, and ensure the safety of the staff when they need to maintain and inspect the high-voltage load.

Description

technical field [0001] The present application relates to the field of electric power technology, in particular, to a safety interlock device and a safety interlock system. Background technique [0002] Shore container cranes (referred to as quay cranes or suspension bridges) are professional equipment specially used for loading and unloading container ships at container terminals. They are generally installed on the shore of port terminals. The high-voltage equipment on the quayside crane equipment includes at least high-voltage switchgear and transformers. The high-voltage switchgear can provide power for the transformer when it is closed. The high-voltage switchgear and the transformer have their own locks for the door or the cover. The door lock can only be opened with a special key, so that the staff can check and check the high-voltage equipment. maintenance, and can prevent non-staff from opening the cabinet door. [0003] The above independent self-locking method ha...

AI Technical Summary

Problems solved by technology

[0003] The above independent self-locking method has the following disadvantages: when the high-voltage switchgear is in the state of closed power supply, since there is no interlock protection device installed between the high-voltage switchgear and the transformer, if the staff opens the transformer cabinet door with a key to check and During maintenance, since there may be high voltage in the intermediate circuit of the transformer, the staff may operate with power on, which brings potential safety hazards to the staff

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