Wuhu salted duck food package installed voltage transformer melt fuse

Wuhu salted duck food package installed voltage transformer melt fuse; When the melt of the vacuum packed electromechanical pressure transformer is blown out, it can be shown as abnormal in normal power transmission. In 10kV and 35kV networks, the three relative voltmeters of the insulation monitoring device may also have corresponding instructions.

(1) wuhu salted duck food package installed voltage transformer melt fuse; For the packaging machine, when the voltage transformer fuse is fused with one phase melt, the indication of one relative voltmeter of the fuse is reduced, and the indication of two relative voltmeters of the non-fuse is normal. The voltage between one phase of fuse and the other two phases is reduced, and the voltage between two phases of fuse is normal. If the grounding signal appears, it is the first phase of the primary side fuse of the voltage transformer. If no grounding signal appears, it is the first phase of the secondary side fuse of the voltage transformer.

(2) wuhu salted duck food package installed voltage transformer melt fuse; When the full-automatic vacuum packed electromechanical voltage transformer fuse is fused with two-phase melt, the indication of the two relative voltmeters of the fused one is very small or close to zero, and the indication of the non-fused one is normal. The voltage of the two phases of the fuse is zero, and the voltage of the other two phases is reduced, but not zero. If the grounding signal appears, it is the two-phase fuse of the primary side fuse of the voltage transformer. If the grounding signal does not appear, it is the two-phase fuse of the secondary side fuse of the voltage transformer.

Wuhu salted duck food package installed voltage transformer melt fuse; When it is found that the hv fuse is blown out, the cause should be carefully identified, and the replacement can only be carried out after confirming that there is no problem. If the low-voltage fuse is fused, the fuse melt of the same capacity and specification should be replaced immediately. Before melt replacement, the relevant protection should be removed. After melt replacement and normal operation, the protection out of use should be put into operation again.

Wuhu salted duck food package installed voltage transformer melt fuse; The common causes of voltage transformer fuse failure include:

1. Single-phase grounding occurs when the neutral point of the high voltage side is grounded.

2. The bus is put into high-voltage capacitor without load.

3. The power consumed by the measuring instrument connected to the secondary side exceeds the rated capacity of the potential transformer or the secondary winding is short-circuited.

In case of lightning strike, inductive lightning flows through the high-voltage side fuse and enters the ground through the neutral point of the voltage transformer, causing the high-voltage side fuse to fuse.

(3) wuhu salted duck food package installed voltage transformer melt fuse; For air-controlled vacuum packing machine and box packing machine, when lightning strikes single-phase grounding in the circuit, the voltage transformer may have a primary side fuse fuse due to its bad excitation characteristics. When the fuse on the high voltage side is blown out, the disconnecting switch on the high voltage side should be pulled open and the fuse on the low voltage side should be checked to see if it is blown out at the same time. If the fuse on the low voltage side has also been blown out, the fault may occur in the secondary circuit. The high and low voltage side fuse can be replaced before trial operation. If the low-voltage side fuse is fused again, the cause should be found out before replacement. If the low-voltage side fuse is not fused, the voltage transformer itself should be checked. The insulation of the transformer can be measured. When the insulation is normal, the fuse can be replaced and the transformer can be put into operation. Note that when checking the high and low voltage fuses, appropriate measures should be taken to prevent the protection device from misoperating.