1. Noise inspection of high and low voltage switchgear:

運行狀態(tài)下的配電變壓器，通常會發(fā)出“嗡嗡”聲，這一聲音具有均勻、輕微的特點。而當聲響發(fā)生變化，則說明配電變壓器產(chǎn)生了一定故障。因此，在對配電變壓器進行日常維護和管理的過程中，對其噪聲進行檢查是關鍵途徑之一。

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.

檢查方法為：應用絕緣拉桿，將其一段牢固頂在配電變壓器上，從另一端聽取配電變壓器發(fā)出的聲響，對是否存在雜音進行判斷。如果此時聽到了“噼啪”聲，則說明配電變壓器運行過程中，產(chǎn)生了擊穿鐵芯的故障；如果所聽到的噪聲非常沉重，且聲音偏大，則說明配電變壓器處于負荷電流過大的運行狀態(tài)下；如果噪聲聲調(diào)較高，同時伴有尖銳的聲響，則說明配電變壓器的鐵芯處于過飽和狀態(tài)，且電源電壓相對較高。

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.對高低壓開關柜油位、油溫以及油色進行檢查：

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

在對配電變壓器的運行狀態(tài)進行檢查的過程中，油位、油溫以及油色是內(nèi)容之一。配電變壓器運行中，通常會散發(fā)一定的熱量，如果工作電流在流經(jīng)線圈時相對較大，將增加發(fā)熱量，此時會導致油溫不斷上升。正常運行狀態(tài)下的配電變壓器，高油溫通常在85～95攝氏度，如果在實際檢查工作中發(fā)現(xiàn)油溫超過這一限值，則說明配電變壓器內(nèi)部發(fā)熱加劇，應及時展開停機修理。

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.

而正常運行狀態(tài)下的配電變壓器，其油位通常在1/4～3/4之間，如果油位異常，很可能是漏油導致的。因此，工作人員必須及時對設備進行檢查；正常運行狀態(tài)下的配電變壓器，油色為淺黃色，在一段時間的運行后會轉(zhuǎn)變成淺紅色，如果顏色加深，說明設備產(chǎn)生了氧化和老化問題。

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.