What are the causes of damage to the pre-charged resistor? You can find the engineers of Zenithsun pre-charging resistor manufacturer to consult!

Pre-charge resistance only allows a short period of time to flow a small current, continuous pre-charge process, or in the operating state of the pre-charge circuit through the rated load current, will cause the pre-charge resistor heat generation is too large and burned, so the pre-charge resistance damage may be:

1. Large fluctuation of incoming grid voltage during standby state, resulting in bus voltage fluctuation, leading to continuous pre-charging process, there is a constant current flow on the pre-charging resistor, which causes damage due to heat generation for a long period of time;.

2. Frequent power-up and power-down of the equipment, or in the case of under-voltage has been reported, frequent multiple reset start-up, the pre-charge resistor continues to work, and damage caused by heat for a long time;.

3. Multiple AC/AC devices share a common braking unit, resulting in a common bus. When any one of them is powered up first, it is equivalent to a set of charging resistors charging multiple capacitor banks, which will cause the pre-charge current to be too large; 4.

4. Pre-charging resistor through the load current: book-type equipment, pre-charging relay is damaged, the coil is not closed after energisation, the pre-charging resistor is still working when the equipment is running; or mounted cabinet-type equipment, the thyristor triggering fault occurs under the running state, the load current flows through the pre-charging circuit.

Looking for zenithsun precharge resistor manufacturers, directly to you to design high quality precharge resistor.