Power transformer temperature is very important

In order to better ensure that the power transformer can operate without problems, several tests, temperature tests, and electric transformers are not everything is normal, and the temperature is high is very important. Technical standards specify that the high-level temperature cannot be high (ie tightening 55c).

The general power transformer is equipped with a special temperature measurement machine device with load determination. In order to better improve the utilization rate of the power transformer, reduce the efficiency of electricity, in the operation of the power transformer, try to measure the ability of the power transformer that is really responsible. The measurement is generally carried out at each season of power consumption in each season, and the clamp current is measured immediately. The amount of current is 70 to 80% of the rated current of the power transformer. When it is more than, it will be adjusted immediately. Work standard voltage measurement. Technical standards require that the standard voltage transition range should be within ± 5% of the rated voltage. 

If it exceeds this range, the distribution should be adjusted to make the current amount guarantee the specified scope. The alternator of the original coil AC voltage and the alternating customer of the uncapacity is generally measured. Ground resistance measurement. In order to better make the power transformer from starting to all normal operation conditions, try to perform the measurement of ground resistance, avoiding the aging of cable jacket and leading to safety production accidents.

When measurement, you must try to stop the power transformer to stop the power transformer, and measure the ground resistance value of the power transformer. If the measurement resistance is 70% higher than the previous measured value, when the ground is grounded, the low-voltage magnet coil can be used 500 Volve current. Some power transformers are grounded immediately, and some power transformers neutral dots are grounded, and the protection of the neutral point of the power transformer is mainly reflecting the ground common fault.

Situation 1: When the management system causes grounding common faults, the power transformer of neutral point should be installed in the maintenance of zero sequence current, which can be composed of 2 segments, and each of them has 2 deadlines, and the short-term posture is disconnected or pressed by segment The gate, narrowing the range of frequent fault damage, legity period gestures on the side of the cutting power transformer.

Case 2: When the management system causes ground common faults, the power transformer of the neutral point is broken, the grid zero sequence voltage is increased or parallel to vibrate the voltage, etc. Cable sheath. Therefore, the power transformer that is not grounded in the neutral point should be installed with zero-sequence voltage maintenance, or the clearance zero sequence current maintenance.