Dry-type step-up transformer 630KVA380v690v tunnel step-up transformation
A brief description of the booster transformer for tunnel construction
The tunnel transformer can solve the problem that the voltage of the power grid is lower than 300v or even lower, the line is too long and the voltage is too low, and too many equipments cause all equipment to fail to start and use normally. Using a voltage booster can increase the voltage to 380-450v, and use electricity. The device starts and works normally. It is especially suitable for places where the voltage is too low, such as factories, mines, roads, railways, tunnels, bridges, irrigation, and air conditioning.
Characteristics and advantages of step-up transformers for tunnel construction:
1. It can solve the problem that the low-voltage grid voltage (300V-380V) equipment cannot operate normally due to the high-voltage grid being too low (less than 10KV) during peak power consumption.
2. This product can solve the problem that the voltage of the high-voltage power grid is normal, and the output of the transformer cannot reach above 380V, but the equipment cannot operate normally due to the long low-voltage line (within 5000 meters).
3. Due to the excessive number of electrical equipment used by this product, the operating voltage is too low, which cannot meet the requirements for starting and operating all equipment.
4. This product can save about 40-50% of the cost compared with generating electricity with a generator set.
5. Voltage stabilizers generally have higher requirements for the working environment, mainly because the integrated circuit of the device requires a better working environment and is easy to be damaged; the carbon brush responds slowly and cannot meet the startup requirements for the instantaneous startup high voltage; the purchase cost Slightly higher than this product, the mission life is shorter, and the maintenance cost is higher. This product can solve the instant high-pressure start, the purchase cost and maintenance cost are lower, and the installation is simple and the use environment is not demanding, the volume is small, and it is convenient for mobile operations.
technical parameter
| Output waveform distortion |
No distortion (compared with input waveform) |
| Voltage variation rate |
≤1.5% |
| Output waveform distortion |
No distortion (compared with input waveform) |
| Insulation class |
F-level, H-level, HC-level are available (normally H-level) temperature resistance 180 degrees |
| Work efficiency |
Self-coupling type＞99% induction type (isolated type)＞95% |
| Output voltage accuracy |
±1% |
| Applicable frequency |
50/60HZ |
| Connection method |
Y/Y, A/YOx YO/A, isolation, auto-coupling (optional) |
| Overload capacity |
Allow more than 1.2 times the rated load to work for 4 hours (long-term full load possible) |
| noise |
W35dB (within one meter) |
| Heat up |
<60°C |
| Insulation resistance |
N150MQ |
| Dielectric strength |
3000VAC/lmin |
| Design life |
50 years |
| working environment |
Temperature: -20~+45°C Humidity: W95%RH non-condensing |
| workplace |
No corrosive gas and conductive dust |
| Safety standard |
Product symbol VDE0550, IEC439, JB5555, GB226 and other national standards |
| cooling method |
Dry/air-cooled |
Type selection of step-up transformer for tunnel construction
1. The user's voltage status requires the user to check the no-load voltage value and the load voltage value.
2. The distance between the transformer and the electrical equipment The user needs to actually measure the distance between the user’s transformer and the electrical equipment.
3. The condition of the user's cable The user needs to check the condition of the cable used by himself. Generally, the total power of the equipment must be matched.
4. Start the total power of the equipment The user should check the total power of the equipment used by himself.
Based on the above information, the user can choose the corresponding model product or propose a customization.
Applicable sites for tunnel construction step-up transformers
1. Ambient temperature: -20~85
2. Relative humidity: ≤90%;
3. The installation site should be free of gases, vapors, chemical deposits, dust, dirt and other corrosive agents that seriously affect the insulation of the equipment quality;
4. There should be no severe vibration or bumps in the installation site;
