制御トランスの焼損の原因は？

今日の機械産業では、ほぼすべての工作機械に 制御トランス. The role of the 制御トランス is often used as the local lighting power supply, signal lamp or indicator power supply for machinery and equipment, and can also be used as the control circuit power supply in electrical equipment. However, when using the 制御トランス, many people may encounter the problem of the 制御トランス being burnt out. In general, what causes the 制御トランス to burn out?

(1) The overloaded use of the 制御トランス transformer causes the temperature rise to be too large, which has exceeded the temperature resistance level of the insulating material, thereby burning the transformer.

(2) 1 次コイルと 2 次コイルの巻線間の絶縁が損傷または経年劣化し、巻線間が短絡し、局部的な過熱により焼損する。

(3) リード線の溶接部は仮想溶接であり、接触抵抗が大きく、局所的な電流密度が高く、電線まで溶断することができます。

(4) 鉄心に貫通穴付きボルトがある場合、ボルトは少なくとも片側から鉄心まで絶縁されている必要があります。そうしないと、磁気短絡が発生すると、ボルトが赤く焼けます。

The above 4 points are the main reasons why the 制御トランス is prone to burn out! After we understand these 4 factors, when we need to use the 制御トランス, we can avoid the 制御トランス with a little attention. burnt condition.

Response measures to 制御トランス burnout:

(1) For the 制御トランス to be burned out due to overload, it is required to replace a 制御トランス with a larger capacity. The power rating of the applied 制御トランス must be greater than that of the driven appliance.

(2) The cause of the circuit failure causes the short circuit of the low-voltage control circuit, which makes the secondary coil current of the 制御トランス too large, which exceeds the rated current of the transformer and burns the machine tool 制御トランス. In this regard, the current limit insurance can be added in front of the transformer for protection.

(3) It is usually necessary to check the insulation of the line. When the insulation of the 制御トランス is found to be damaged or aged, the transformer should be replaced in time to avoid leakage and short circuit.

(4) 過電流を避けるために、機械の回転部分に詰まりがないかどうかを確認します。