What are the emergency treatment methods for an open-circuited Power Current Transformer?

1. Stop related operations immediately
Once the secondary side of the Power Current Transformer is found to be open-circuited, all ongoing operations related to the secondary circuit of the transformer, such as replacing the ammeter and removing the wires, should be stopped immediately to prevent further expansion of the danger due to improper operation.
2. Short-circuit the secondary circuit
Use insulating tools, such as insulated wires and short-circuit pieces, to short-circuit the secondary winding of the Power Current Transformer as soon as possible. When short-circuiting, attention should be paid to the reliability of the short-circuit and ensure that the short-circuit parts are in good contact to prevent dangerous situations such as arcs during the short-circuit process. In general, the two terminals of the secondary winding can be short-circuited directly with a short-circuit piece or a wire so that the secondary current can form a path through the short-circuit circuit, thereby limiting the induced electromotive force at both ends of the secondary winding and avoiding the generation of high voltage.
3. Check and handle the open circuit point
After short-circuiting the secondary circuit, the secondary circuit can be checked to find the open circuit point. The open circuit point may be caused by loose terminals, broken wires, poor contact, etc. If the terminal is loose, tighten it with a tool; if the wire is broken, replace the damaged wire and ensure that the connection is firm. When handling the open circuit point, it must be done with the secondary circuit short-circuited. After the handling is completed, remove the short-circuit device.
4. Monitor the status of the equipment
During the emergency treatment process and after the treatment is completed, closely monitor the operating status of the Power Current Transformer and related equipment, including the temperature, sound, secondary current and other parameters of the transformer, as well as the working conditions of the measuring instruments and relay protection devices connected to it. If the equipment is found to be abnormal, such as the transformer temperature is too high, the measuring instrument shows abnormality, etc., further measures should be taken in time, such as reducing the load, checking the insulation of the equipment, etc., to ensure the safe operation of the equipment.
5. Notify professionals
While carrying out emergency treatment, relevant professional technicians or power maintenance personnel should be notified in time to inform them of the open circuit on the secondary side of the Power Current Transformer and the emergency measures that have been taken. After the professional arrives at the site, he can conduct a comprehensive inspection and test of the equipment, assess the degree of damage to the equipment, and determine whether further repairs or replacements are needed.
6. Record and report
The open circuit situation on the secondary side of the Power Current Transformer, the emergency treatment process, and the status changes of related equipment shall be recorded in detail, including the time, location, treatment method, equipment parameter changes, etc. These records will help to analyze and summarize the cause of the accident later, and also provide a reference for the maintenance and management of the equipment. In accordance with relevant regulations and requirements, the incident shall be reported to the superior competent department or power dispatching center in a timely manner.