By hvhipot 
The integrated transformer tester is designed for automatic testing of protection and metering CT/PT, which is suitable for laboratory and on-site testing. What should be done when a current transformer encounters a fault?
1. Handling of abnormal sound or overheating of the iron core.
During the operation of the current transformer, if the secondary circuit is open or overloaded, abnormal sound will be generated or the iron core will be overheated seriously. If the semiconductor paint surface is not evenly painted, it is easy to produce a louder sound. Therefore, if an abnormal sound or iron core overheating occurs during the operation of the current transformer, it is necessary to observe the actual situation of the side instrument in detail to find out the cause of the fault in time. If the transformer is abnormal due to a large load, the load needs to be appropriately reduced, and to ensure that it can meet the rated load requirements, and continue to observe the specific operation of the current transformer; if the secondary circuit causes the transformer to be abnormal , It is necessary to immediately stop the operation of the equipment; if the insulation damage causes the discharge problem, the current transformer needs to be replaced in time.
2. Handling of abnormal operation.
In the operation of current transformer, there may be open circuit, heating problems, loose bolts, weird sound and other problems. At this time, the staff need to take scientific and effective measures to deal with these problems, such as judging the current transformer When the secondary circuit is open, it is necessary to comprehensively consider the meter indication, sound, etc.; when detecting the heating of the current transformer, it can be tested by the test temperature wax. Especially when the check = secondary circuit is open, if there is a problem, the indication of the ammeter is “0”, and the energy meter is in a stopped state at this time, and then there is a buzzing sound, and then there will be an abnormality in the current transformer Sound, and then scorched a large number of terminal blocks. Once any of the above situations occurs during the operation of the current transformer, it is necessary to immediately stop the operation of the equipment.
3. Open the secondary circuit.
In the operation of current transformers, the secondary side high voltage phenomenon may be caused by the saturation of the magnetic flux in the iron core, which will cause the discharge phenomenon to occur at the open circuit point of the secondary circuit, and then the discharge sound or discharge spark phenomenon will occur. In addition, the loss of the iron core will increase due to the saturation of the magnetic flux and generate heat. In this case, peculiar smell and abnormal sound will be generated in the insulating material. At the same time, the abnormal phenomenon of the electric energy meter rotation speed is generally caused by the current transformer-the ammeter connected to the secondary side without indication or the indication fluctuation. Therefore, once an open circuit occurs on the secondary side of the current transformer during the operation of the transformer, it is necessary to stop the operation of the equipment in time and take effective measures to deal with it. First, there is no way to perform a power outage. It is necessary to reduce the primary load current as soon as possible, and connect the secondary circuit of the current transformer through the insulation I before the open circuit point to form a short circuit. After the fault is eliminated, the short circuit is removed.