1. Noise inspection of high and low voltage switchgear:

运行状态下的配电变压器，通常会发出“嗡嗡”声，这一声音具有均匀、轻微的特点。而当声响发生变化，则说明配电变压器产生了一定故障。因此，在对配电变压器进行日常维护和管理的过程中，对其噪声进行检查是关键途径之一。

The distribution transformer in operation usually makes a "buzzing" sound, which is uniform and slight. When the sound changes, it indicates that the distribution transformer has a certain fault. Therefore, in the process of daily maintenance and management of distribution transformer, checking its noise is one of the key ways.

检查方法为：应用绝缘拉杆，将其一段牢固顶在配电变压器上，从另一端听取配电变压器发出的声响，对是否存在杂音进行判断。如果此时听到了“噼啪”声，则说明配电变压器运行过程中，产生了击穿铁芯的故障；如果所听到的噪声非常沉重，且声音偏大，则说明配电变压器处于负荷电流过大的运行状态下；如果噪声声调较高，同时伴有尖锐的声响，则说明配电变压器的铁芯处于过饱和状态，且电源电压相对较高。

The inspection method is as follows: apply an insulating pull rod, firmly push one section of it on the distribution transformer, listen to the sound from the distribution transformer from the other end, and judge whether there is noise. If the "crackle" sound is heard at this time, it indicates that the core breakdown fault occurs during the operation of the distribution transformer; If the noise heard is very heavy and loud, it indicates that the distribution transformer is in the operation state of excessive load current; If the noise tone is high and accompanied by a sharp sound, it indicates that the iron core of the distribution transformer is in an oversaturated state and the power supply voltage is relatively high.

2.对高低压开关柜油位、油温以及油色进行检查：

2. Comprehensively check the oil level, oil temperature and oil color of high and low voltage switchgear:

在对配电变压器的运行状态进行检查的过程中，油位、油温以及油色是内容之一。配电变压器运行中，通常会散发一定的热量，如果工作电流在流经线圈时相对较大，将增加发热量，此时会导致油温不断上升。正常运行状态下的配电变压器，高油温通常在85～95摄氏度，如果在实际检查工作中发现油温超过这一限值，则说明配电变压器内部发热加剧，应及时展开停机修理。

In the process of checking the operation state of distribution transformer, oil level, oil temperature and oil color are one of the contents. During the operation of distribution transformer, it usually emits some heat. If the working current is relatively large when flowing through the coil, it will increase the calorific value, which will lead to the continuous rise of oil temperature. For the distribution transformer under normal operation, the high oil temperature is usually 85 ~ 95 ℃. If the oil temperature exceeds this limit in the actual inspection, it indicates that the internal heating of the distribution transformer is intensified, and the shutdown and repair shall be carried out in time.

而正常运行状态下的配电变压器，其油位通常在1/4～3/4之间，如果油位异常，很可能是漏油导致的。因此，工作人员必须及时对设备进行检查；正常运行状态下的配电变压器，油色为浅黄色，在一段时间的运行后会转变成浅红色，如果颜色加深，说明设备产生了氧化和老化问题。

The oil level of distribution transformer under normal operation is usually between 1 / 4 and 3 / 4. If the oil level is abnormal, it is likely to be caused by oil leakage. Therefore, the staff must inspect the equipment in time; The oil color of distribution transformer under normal operation is light yellow and will change to light red after a period of operation. If the color is deepened, it indicates that the equipment has oxidation and aging problems.