Generator set find out how to avoid wet generator set in humid climate:

1.負(fù)載單調(diào)方法：

1. Load monotonic method:

假設(shè)表面只潮濕，負(fù)載單調(diào)可以單調(diào)。單調(diào)時(shí)，發(fā)電機(jī)組可以在50%的額定電流負(fù)載下工作。 然后將額定電流增加65%、85%和100%。每個(gè)階段的負(fù)荷為4到5小時(shí)。 每個(gè)繞組的絕緣電阻應(yīng)在單調(diào)過(guò)程中及時(shí)檢測(cè)。絕緣電阻值滿足要求后，可間歇單調(diào)，一般檢測(cè)發(fā)電機(jī)組。

Assuming that the surface is only wet, the load can be monotonous. When monotonous, the generator set can work under 50% of the rated current load. Then increase the rated current by 65%, 85% and 100%. The load of each stage is 4 to 5 hours. The insulation resistance of each winding shall be timely detected in the monotonous process. After the insulation resistance value meets the requirements, the generator unit can be inspected intermittently and monotonously.

2.冷操作方法：

2. Cold operation method:

在AVR當(dāng)電源線斷開(kāi)時(shí)，長(zhǎng)期放置在灰塵或潮濕環(huán)境中的發(fā)電機(jī)組可擱置約10分鐘。這可能足以單調(diào)繞組表面，并將絕緣電阻提高到1兆歐元以上。 該設(shè)備可恢復(fù)正常運(yùn)行。

In AVR, when the power line is disconnected, the generator set that has been placed in the dust or humid environment for a long time can be set aside for about 10 minutes. This may be sufficient to monotone the winding surface and increase the insulation resistance to more than 1 trillion euros. The equipment can resume normal operation.

3，熱風(fēng)法：

3. Hot air method:

拆下發(fā)電機(jī)組的所有蓋板，排出濕空氣。用吹風(fēng)機(jī)從發(fā)電機(jī)組進(jìn)氣口吹入。請(qǐng)注意，熱源和繞組應(yīng)至少保持300mm，控制繞組的表面溫度，避免過(guò)熱和絕緣損壞。繞組表面溫度不得超過(guò)855°C，入口不得超過(guò)90°C,連續(xù)吹氣半小時(shí)，記錄絕緣電阻值。當(dāng)值大于指定值時(shí)，單調(diào)過(guò)程完成。取下吹風(fēng)機(jī)，蓋上所有蓋子，再試一次。

Remove all covers of the generator set and discharge the wet air. Blow in from the air inlet of the generator set with a blower. Please note that the heat source and winding shall be kept at least 300mm, and the surface temperature of the winding shall be controlled to avoid overheating and insulation damage. The winding surface temperature shall not exceed 855 ° C and the inlet temperature shall not exceed 90 ° C. the air shall be continuously blown for half an hour and the insulation resistance value shall be recorded. When the value is greater than the specified value, the monotonic process is completed. Remove the hair dryer, cover all the covers, and try again.

四、短路電流單調(diào)：

4、 Short circuit current monotonous:

一是機(jī)組機(jī)電設(shè)備安全工作，確保發(fā)電機(jī)組安全工作。發(fā)電機(jī)組的輸出端通過(guò)短路片短路，所使用的短路片應(yīng)能機(jī)組的額定電流。斷開(kāi)AVR并切換到外部0~24V調(diào)度直流電源電壓，使定子每相電流達(dá)到額定電流的50-70%。每30分鐘停止一次，切斷外部激勵(lì)電源，檢查并記錄絕緣電阻值。假設(shè)絕緣電阻值大于規(guī)定值，則可以移除外部直流電源，并且可以重新銜接并重新調(diào)試AVR。發(fā)電機(jī)組可以在額定速度下工作，但速度應(yīng)保持穩(wěn)定，以避免溫度不穩(wěn)定。

First, the safety work of the electromechanical equipment of the unit shall ensure the safe work of the generator unit. The output end of the generator set is short circuited through the short-circuit piece, and the short-circuit piece used shall be able to meet the rated current of the unit. Disconnect the AVR and switch to the external 0 ~ 24V dispatching DC power supply voltage to make the stator current of each phase reach 50-70% of the rated current. Stop once every 30 minutes, cut off the external excitation power, check and record the insulation resistance value. Assuming that the insulation resistance value is greater than the specified value, the external DC power supply can be removed, and the AVR can be re connected and re commissioned. The generator set can work at the rated speed, but the speed shall be stable to avoid temperature instability.

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