address:No.10, Lane 669, Min Ta Road, Songjiang District, Shanghai, China
phone:189-1713-2726
email:qianghaibin@sh-yhcd.com
Water-cooled transformers are suitable for situations where the heat dissipation environment is poor. There are two types of water-cooled transformers. One is an internal circulation product integrating water and electricity, which uses hollow wires as water pipe cooling devices for cooling; the other uses a water-electricity separated external circulation cooling method, in which the waterway does not pass through the winding, the water and the electricity does not affect each other, and the heat of the winding and the core is absorbed indirectly through the cooling plate. Water-cooled transformers are mainly used in high-power DC power supplies and high-power electric furnaces in electrolytic plating. They are one of the important components of AC equipment. For conventional transformer products with poor heat dissipation conditions, water-cooled structures can also be used.
1. Cooling Method: water cooling, the working pressure of the waterway is 0.15 ~ 0.2MPa, and water flow rate is 16L/min
2. Insulation Class: F
3. Overload Requirements: overload 5% (long-term operation), overload 10% (30min), overload 50% (10s)
4. Temperature Rise: The temperature rise of the coil, magnetic core is less than 100℃
5. Withstand Voltage: core-winding, winding-bracket, bracket-core, AC 3500V/50Hz/10mA, 1 minute
6. Insulation Resistance: core-winding, winding-bracket, bracket-core, >10MΩ (DC 1000V)
7. Noise: ≤65dB (at 1 meter)
8. Protection Class: IP00
9. Storage Temperature: -40 ~ +70℃
10. Operation Environment: -30 ~ +55℃, use with derated values when above 50℃
11. Working Altitude: rated current when below 1000 meters, and rated current derated by 1% for every 100 meters when above 1000 meters
12. There must be a water source for cooling at application site. There must be no mechanical impurities in the cooling water, and the hardness should not exceed 10 units
13. When the transformer is put into operation, the water must not be cut off, the inlet water temperature must not exceed 33°C, and the outlet water temperature must not exceed 45°C
1. All materials used in the waterway are stainless steel, which has high strength, corrosion resistance and a service life of more than 20 years
2. The connection of water pipes and joints adopts a strong locking structure to ensure that the cooling medium does not leak, and the maximum working pressure is 10bar
3. The water pipe is 8mm O.D. and 6mm I.D. the flow rate can reach 19L/min, and the heat dissipation efficiency is high
4. The waterway is series structure, with four inlets and four outlets, and then each is connected to a main water joint. The joints are stainless steel pipe threads with sizes G3/8, G1/2, G1/4 or customized non-standard threads
1. Plate water-cooled transformer
The water-cooled heat sink is placed in the coil of the plate water-cooled transformer. The heat generated by the transformer is conducted through the heat sink and then exported through the water medium to reduce the temperature rise. The transformer separates water and electricity, so there is no leakage current. Our company have produced water-cooled transformers with load currents of 1000 ~ 25000A and voltage levels below 10kV. They are widely used in electrical equipment for wind power generation, high-power rectification, high-power electric heating.
2. Tubular water-cooled transformer
The winding is made of hollow copper tubes, and the heat generated by copper loss is dissipated through the heat-conducting medium (pure water or mixed liquid) in the copper tube. The thermal contact between the heat-conducting medium and the heating conductor is good, the thermal conductivity is high, and the winding can withstand large currents. The load current is 1000 ~ 25000A, the voltage level is within 100V, and it is widely used in industrial equipment for smelting and induction heating.
VDE0550
