2) appearance quality: 1. All fasteners are fastened and the insulation parts are intact; 2. No rust, damage or multi-point grounding of metal parts; 3. The windings are intact, non-denaturing, non-displacement, non-damage, no debris inside, and the surface is smooth without cracks; 4. The distance between leads and connecting conductors and ground conforms to relevant national standards. The surface of naked conductor is free from damage, burr and sharp Angle, and the welding is good; 5. The ground part has obvious marks and is equipped with standard nuts and bolts.

 

1. The fan motor and conductor are well insulated, the insulation resistance is greater than 0.5 megohm, and the over-current protection is intact; 2. The fan blade has no crack, no degeneration and no stuck resistance in rotation; 3. When the fan is running, there is no abnormal vibration, no abnormal noise, and no abnormal heating of the motor.

 

4) temperature controller: the temperature display is normal, and it will be displayed once every 2~3 seconds, and the temperature value of each phase can be automatically displayed; 2. Can automatically display the highest temperature value and phase sequence, can quickly switch display and lock display and memory display of the highest temperature value; 3. When the temperature is greater than or the setting value of the start and stop of the hell fan, the fan can be controlled to start and stop, and the status indicator light is displayed; 4. When the temperature is greater than the alarm setting value, the over-temperature sound-light alarm can be carried out. At the same time, the tripping alarm light is on, the tripping output contact is closed and the tripping control circuit is connected; 5. When the PT transformer and the lead of the transformer are broken or short circuit, the fault light is on, the alarm output contact is closed and the fault processing circuit is connected; 6. The temperature controller shall be free from the interference of surrounding electromagnetic fields; 7. The temperature controller is installed in a reasonable position for observation and maintenance.

 

5) protection device: the installation of power distribution device shall meet the design requirements, and the opening of cabinets and net doors shall not affect each other; 2. Tight wire connection, clear and correct phase color representation; 3. The phase and ground distance of the charged part conform to relevant design standards; 4. Solid and reliable grounding part; 5. The fuse of the temperature controller should have sufficient breaking capacity, and double power supply can be used if necessary; 6. Equipment name and safety warning signs shall be marked for cabinets, net doors and barriers.

 

1. Complete transformer handover test records; 2. The transformer is charged for 24 hours without any abnormality; 3. The transformer tap switch meets the operation requirements; 4. Put all protective devices into operation for 5 no-load closing times, no less than 10 minutes for the first time, no abnormality; 5. Check the temperature controller and its temperature indication is consistent with the actual temperature; 6. The fan starts and stops automatically normally, without abnormal noise and temperature rise.

Baoding zhongyi electric material manufacturing co., LTD is a professional manufacturer of transformer for baoding transformer factory. It has professional production equipment, hoisting, tooling and testing equipment, and has established a perfect quality management system.

 

Main products of the company: baoding dry type transformer, baoding box type transformer, baoding oil immersed transformer, baoding high and low voltage complete sets of equipment. I companies to follow "detail decides success or failure, honesty molded the future" of the enterprise purpose, adhere to "quality measuring market, seek development by innovation, to management for efficiency" business philosophy, to make my company's products are widely used in power plant, chemical, construction, mining, metallurgy, rail transportation and other industries, to meet the needs of various users, my company rely on superior product quality, thoughtful service, won the trust of our customers.