Usually do not monitor the transformer long-term overload operation, to prevent the oil temperature is too high and the switch to touch the heat, so that the spring pressure is reduced, the part is deformed or loose wiring screws, resulting in poor contact with the switch and arc burns.
Samples of transformer oil are routinely tested and unqualified persons are dealt with in a timely manner. Always check the transformer for oil leakage. Pay attention to the actual oil level in the oil pillow. Do not mistake it by false oil level indication. Otherwise, because the oil level is too low, the pressure regulator switch is exposed in the air and gets wet, reducing the dielectric strength.
Switching the no-load pressure regulating switch must be performed under the condition of power off. The operation should be carefully and carefully. When encountering the situation of the card shaft, do not forcibly pull the wrench to prevent damage to the shaft and the contacts. Use the bridge to measure the DC before and after the shift. Resistance, and make records, three-phase resistance should be balanced, the deviation should be within the allowable range. The resistance value after shifting should also be compared with previous records before shifting to confirm whether the position of the switch is normal and whether the contact is good. It is used as the voltage transformer calibration standard in the transformer error test. The YTC2130 self-boosting precision voltage transformer is mainly designed and manufactured to meet the actual needs of the primary power supply and production departments.
After the new transformer is operated for 2 years or after the pressure switch is replaced, the insulation resistance and DC resistance of the voltage regulator shall be measured with a megohmmeter and a bridge, and the upper oil temperature shall be measured at the same time for comparison. The accuracy of the measuring instrument should not be lower than 0.5. For transformers below 6300 kVA, the DC resistance deviation: should be less than 4% between phases; the line should be less than 2%.
Mini Excavator Final Drive
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You may call it a Mini Final Drive or a Mini Excavator Travel Motor With Gearbox, but no matter the name, when your Excavator Final Drive needs to be replaced, you can`t afford to have your machine down for long.
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