The use of RC absorber
RC absorber connected to the circuit breaker outlet of the current transformer and the protection of the lower side of the electrical equipment between the side, the closer to the protected equipment, the better the effect. See wiring diagram for details. It is recommended that the RC absorber should be installed on the line side of the circuit breaker if the RC absorber is not installed in the previous stage. Capacitor capacity of the RC capacitor is 100 ~ 10000KW, the capacity of the protection transformer is 100 ~ 45000KVA, and the capacity of the protection capacitor is 1000 ~ 10000Kvar.
Schematic drawing of the RC absorber
The Use and Maintenance of Resistive Capacitance Absorber
The RC absorber is a maintenance-free device and must be discharged sufficiently after discharge or inspection, until it is exhausted, or it may endanger personal safety. RC absorber must do a preventive test every year, pressure test can be used in any one of the frequency or DC, the test voltage and acceptance test the same. With the bridge to measure the capacitor (not including the resistance) capacitance and tanδ value of whether there is a change in order to determine whether to continue to run, while the test data should be recorded in order to compare with the factory data. The factory is ready to provide consulting services. Practice has proved that the occurrence of accidents are not required in accordance with the requirements of this preventive test, resulting in particular emphasis must be implemented.
Fault Judgment Method of Resistive Capacitance Absorber
Resistor capacitance before the operation of the capacitor with a higher precision measurement of the capacitor part of the RC absorber capacitor value and tanδ value. When doing a prophylactic test, the capacitance and tan delta should be measured with the same bridge and compared with the previous measurement to see if there is any change. If 40.5KV product capacity increased by 2.5%, 7.2KV and 12KV capacitance increased by 5% or more, indicating that the capacitor internal failure should be replaced. Measured tanδ value increased significantly, should also be replaced. Conditional, can also do pressure test, can be used in frequency voltage or DC voltage in any one of its pressure test and acceptance of the same test does not appear flashover or breakdown, they continue to run, Otherwise it must be replaced.
