Large-scale high-voltage motor winding on-site drying method
A high-voltage motor and drying method technology, which is applied to electric components, manufacturing motor generators, electrical components, etc., can solve the problems of reduced winding insulation resistance, long maintenance period, affecting production, etc., so as to shorten the construction period, reduce maintenance costs, The effect of reducing drying time
Inactive Publication Date: 2018-04-13
马鞍山马钢电气修造有限公司
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[0002] After long-term operation and storage, insulation aging or moisture absorption, the winding insulation resistance of the motor decreases. When it is lower than the minimum start-up standard, it must be dried to eliminate the moisture in the insulation structure of the motor. In the past, it was dismantled from the site and sent to a professional repair unit to disintegrate and enter the drying room. Drying method, this method has the problems of long maintenance period and high cost, which seriously affects production
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[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0020] A method for on-site drying of large-scale high-voltage motor windings, said method comprising the following steps:
[0021] Step 1: Prepare the equipment and materials used before drying. The equipment and materials used include a three-phase power transformer, three cables and an infrared point thermometer. The three-phase power transformer is about 500kVA;
[0022] Step 2: Detect the insulation resistance of the stator winding of the motor. If the insulat...
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The invention discloses a large-scale high-voltage motor winding on-site drying method. The drying method comprises the following steps of preparing equipment and materials for use before drying; detecting the insulating resistance of a motor stator winding; selecting section specifications of corresponding cables; blocking a motor rotor, if the motor is a synchronous motor, enabling a rotor exciting winding to be short circuited, and if the motor is a winding type motor, enabling a rotor winding to be short circuited; and enabling a three-phase alternating current circuit to be connected to athree-phase winding of the motor, ensuring the current in the winding to be about 50% of a rated current, and detecting the winding temperature. By virtue of the onsite three-phase low-voltage powersupply, the three-phase alternating current is connected to the motor stator winding, and the stator and the rotor generates energy consumption and eddy current to heat the winding to discharge moisture in the winding; and therefore, by virtue of the method, the motor drying time is greatly shortened, manpower and material cost generated by disintegration and drying of the special overhaul unit can be avoided, the drying speed is greatly improved, the construction period is effectively shortened and the overhaul cost is lowered, and a relatively high popularization value is achieved.
Description
technical field [0001] The invention belongs to the field of electrical equipment maintenance, and in particular relates to a method for on-site drying of large-scale high-voltage motor windings. Background technique [0002] After long-term operation and storage, insulation aging or moisture absorption, the winding insulation resistance of the motor decreases. When it is lower than the minimum start-up standard, it must be dried to eliminate the moisture in the insulation structure of the motor. In the past, it was dismantled from the site and sent to a professional repair unit to disintegrate and enter the drying room. Drying method, this method has the problems of long maintenance period and high cost, which seriously affects production. Contents of the invention [0003] The purpose of the present invention is to overcome the above problems in the prior art, and provide a method for on-site drying of large-scale high-voltage motor windings. The stator and rotor generat...
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Login to View More IPC IPC(8): H02K15/12
CPCH02K15/12
Inventor孙晓忠付吉祥宋远国
Owner马鞍山马钢电气修造有限公司