FIELD: protective equipment.
SUBSTANCE: invention relates to the protection of control and measuring devices, such as energy metering devices. The protective locking mechanism contains the first mount, the second mount and the third mount for attaching the first mount to the second mount. The first mount contains a socket, the second mount contains a plate with a hole, the third mount is a seal containing a protruding element that enters the socket of the first structure and the hole in the plate of the second mount to connect the first mount with the second mount. The serial number (40) is provided on the second mount. The serial number is encrypted and placed in the code (43). The code is printed on the third mount.
EFFECT: offline check is provided to determine whether the seal belongs to this counter or to determine the change or substitution of the seal.
14 cl, 7 dwg
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