Today, more technology, Dongguan Hui Deng workers to share a "six high-frequency transformer self-protection mode", so that more high-frequency transformer transformer manufacturers produce correct, first let's understand the work of the high-frequency transformer in a more dangerous when the environment, usually using self-protection, not the normal working condition are mainly high-frequency transformer overload, over-current external short circuit caused by a short circuit caused by external grounding the neutral point of over-voltage, reducing the oil spill caused by tank temperature or cooling system failure caused by elevation. In addition, large-capacity high-frequency transformer, due to its higher rated operating flux density, flux density is proportional to the voltage frequency ratio, running at over-voltage or low frequency, may cause over-excitation transformer failure. For the above, here Hui Yue Technology summarizes the high-frequency transformer protection generally use the following six ways:
One, overload protection: overload protection symmetry, acts only on the signal.
Second, gas protection: protect high-frequency transformer oil to reduce internal short circuit and malfunction.
Third, over-excitation protection: protect high-frequency transformer over-excitation does not exceed the limit allowed.
Four, zero sequence current protection: protect large ground current system of external single-phase ground short circuit.
Five, over-current protection: external phase short circuit protection, and as a gas protection and differential protection (or current protection) backup protection.
Six, differential protection, current protection: protection of each phase short circuit phase to ground short-circuit systems and large ground currents between Windings transformer winding or lead.
In which the protective effect of high-frequency transformer tank of gas to protect the internal reaction of various faults and oil decreased. 0.8MVA and high-frequency transformer oil over and above the 0.4MVA workshop and oil-immersed transformers, gas protection should be installed. When a fault in the fuel tank of gas or oil to produce a slight decrease in the signal should be instantaneous action; When a large amount of gas, you should disconnect the transformer action on each side of the circuit breaker. Oil-immersed transformers with load regulator regulating device should also install gas protection. More Hui Yue Technology technical articles, please continue to focus on: core plastic bag automatic assembly machine