TDN series water-cooled resistance welding transformer has the advantages of high welding efficiency, large output current, fast speed, firm weldment and low welding cost. It is suitable for the welding of a variety of materials, such as aluminum alloy, aluminum and other materials with fast heat conduction and poor weldability. In addition, the welding quality of galvanized sheet and ordinary multi-layer sheet is much higher than that of power frequency welder. It is a welding transformer specially designed for spot welding machine, seam welding machine, flash welding machine, projection welding machine, roll welding machine, automatic welding machine, collision welding machine, butt welding machine, DC welding machine, etc. This series of transformer is different from arc welding machine transformer, but close to low-voltage high current transformer. It is divided into two series: single alternating current (DC) and three-phase rectification. This series of products is characterized by high primary voltage, low secondary voltage and large instantaneous output current, and the secondary adopts water cooling, which has the advantages of high welding efficiency, fast speed, firm weldment and low welding cost; Our company can carefully design the required temporary load rate according to the customer's requirements.

Features:

1. The current is large and the voltage is low. The commonly used welding current is 2000 ~ 40000a. Because the resistance of weldment and welding circuit are within the order of micro ohm, the secondary voltage of transformer is not high, so water circulation cooling is adopted.

2. The power is large and adjustable. Due to the large welding current, the capacity of water-cooled resistance welding transformers is greater than 25KVA, and the number of turns of primary winding is changed to change the welding power. A high-power controllable and control box is installed on the power side to realize the functions of stepless adjustment of welding time and welding current.

3. The operation is discontinuous and there is no no no-load operation. Generally, the switch of resistance welding transformer is placed between the primary winding and the power line. Before connecting the primary winding to the power grid, the weldment has been pressed in the weldment, the welding circuit has been closed, and once the power supply is connected, the transformer will operate under load, so there is generally no no-load state (except flash butt welding). During welding, it is generally not necessary to turn on the power supply for the procedures of weldment loading and unloading, clamping, welding position movement and pre pressing, forging and rest in the welding cycle. Therefore, the power on working time of resistance welding transformer is intermittent.

Technical parameter

Number of phases: single phase / three phase

Capacity: tdn-25kva ~ 1600KVA

Input voltage: single phase 220V / 380V / 440, three-phase 380V

Output voltage: 1 ~ 30V, etc. (customizable)

Frequency: 50 / 60Hz

Temporary load rate: 20% - 100%

Insulation class: Class F

Insulation resistance: ≥ 50m Ω

Temperature rise: 60K

Electrical strength: power frequency sinusoidal voltage 3000V for 1 minute without breakdown and flashover

Ambient temperature: - 20 ℃ ~ + 50 ℃

Altitude: ＜ 1000M

Relative humidity: ＜ 90%

Cooling mode: water cooling

Workplace: no corrosive gas and conductive dust

Note: the installation site is free of gas vapor, chemical deposition, dust, dirt, other explosive and corrosive gases and conductive dust that seriously affect transformer insulation

Use environment

1. Altitude below 2000m;

2. The ambient temperature shall not exceed 40 ℃;

3. The relative humidity shall not exceed 90%;

4. Places without violent vibration and shock vibration;

5. The ambient air shall not contain harmful gas, combustible gas or dust that corrodes metal and destroys insulation. During use, the transformer shall not be eroded by water, rain and snow;

6. The supply voltage shall not exceed 10% of the nominal voltage.

Product quality assurance and service guarantee of the company:

 Before leaving the factory, each product is fully inspected in strict accordance with the national standard to ensure that the factory pass rate is 100%, and all products are guaranteed for one year（ (except for special customer requirements)