1. Noise inspection of high and low voltage switchgear:

運(yùn)行狀態(tài)下的配電變壓器，通常會(huì)發(fā)出“嗡嗡”聲，這一聲音具有均勻、輕微的特點(diǎn)。而當(dāng)聲響發(fā)生變化，則說(shuō)明配電變壓器產(chǎn)生了一定故障。因此，在對(duì)配電變壓器進(jìn)行日常維護(hù)和管理的過(guò)程中，對(duì)其噪聲進(jìn)行檢查是關(guān)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(yīng)用絕緣拉桿，將其一段牢固頂在配電變壓器上，從另一端聽(tīng)取配電變壓器發(fā)出的聲響，對(duì)是否存在雜音進(jìn)行判斷。如果此時(shí)聽(tīng)到了“噼啪”聲，則說(shuō)明配電變壓器運(yùn)行過(guò)程中，產(chǎn)生了擊穿鐵芯的故障；如果所聽(tīng)到的噪聲非常沉重，且聲音偏大，則說(shuō)明配電變壓器處于負(fù)荷電流過(guò)大的運(yùn)行狀態(tài)下；如果噪聲聲調(diào)較高，同時(shí)伴有尖銳的聲響，則說(shuō)明配電變壓器的鐵芯處于過(guò)飽和狀態(tài)，且電源電壓相對(duì)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(duì)高低壓開關(guān)柜油位、油溫以及油色進(jìn)行檢查：

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

在對(duì)配電變壓器的運(yùn)行狀態(tài)進(jìn)行檢查的過(guò)程中，油位、油溫以及油色是內(nèi)容之一。配電變壓器運(yùn)行中，通常會(huì)散發(fā)一定的熱量，如果工作電流在流經(jīng)線圈時(shí)相對(duì)較大，將增加發(fā)熱量，此時(shí)會(huì)導(dǎo)致油溫不斷上升。正常運(yùn)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(shí)際檢查工作中發(fā)現(xiàn)油溫超過(guò)這一限值，則說(shuō)明配電變壓器內(nèi)部發(fā)熱加劇，應(yīng)及時(shí)展開停機(jī)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(yùn)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(dǎo)致的。因此，工作人員必須及時(shí)對(duì)設(shè)備進(jìn)行檢查；正常運(yùn)行狀態(tài)下的配電變壓器，油色為淺黃色，在一段時(shí)間的運(yùn)行后會(huì)轉(zhuǎn)變成淺紅色，如果顏色加深，說(shuō)明設(shè)備產(chǎn)生了氧化和老化問(wèn)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.