The shear pin signal device CJX-9 is also called as annunciator. It is made of brittle polyhexene material and is divided into two types: normally open and normally closed. The normally closed shear pin signal device needs to be matched with the shear pin signal device, while the normally open type does not require a shear pin signal device.

The shear pin annunciator CJX-9 is installed in the shear pin hole of the turbine guide vane, and when the shear pin is cut, an electrical signal is emitted. The main purpose of the shear pin is to cut off the mechanical connection between the water turbine generator set and the water turbine in emergency situations, thereby preventing the operation of the water turbine generator set. For example, in the event of a generator set malfunction or other emergency situation, the operator can trigger the shear pin to quickly stop the generator set from rotating to prevent further damage or danger.

It should be noted that the shear pin of a hydropower station is an emergency safety device and should only be used in emergency situations. When operating or maintaining hydropower station equipment, operators must follow relevant safety regulations and procedures, and only personnel who have received appropriate training and authorization can operate the hydropower station shear pin. This can ensure the correct use of the shear pin and prevent unnecessary accidents or damage from occurring.