LFD Low Frequency Heating Device
LFD
-
Advantages
- full automation;
- intelligent hardware;
- compact size;
- low power consumption;
- drying of transformer windings;
- windings overheating protection.
The LFD device is designed for heating and drying transformer windings. The principle of the device functioning is based on low-frequency electric currents through the transformer windings and heating these windings to a standard drying temperature of +75… +120°C. Due to the fact that when heated by low-frequency currents, the heat source is the winding itself and the heating comes from the inside, the removal of moisture from the thickness of the insulation proceeds faster and more completely in comparison with other heating methods.
The LFD device can be used in conjunction with the CMM thermal vacuum dryers to improve the drying oil-filled transformers efficiency. In this case during the drying of the transformer there are two simultaneous processes of direct heating of the windings of the disconnected transformer and the removal of moisture which was released from the windings into the oil.
If the oil is drained from the transformer, then it is effective to use the LFD device complete with BV or UVV or Mojave Heat units, which remove moisture released from the windings into the transformer tank.
The process lasts automatically after the windings warming up to a temperature of +75… +120°C until the amount of moisture in the oil becomes less than 10 g/t (ppm).
| № |
Parameter |
Value |
|
| 1 | Maximum input current (AC), А |
185 |
|
| 2 | Maximum output current (sinusoidal AC), A |
200 |
|
| 3 | Automatically controlled AC output voltage, V |
0-400 |
|
| 4 | Ambient temperature, °C |
0-40 |
|
| 5 | Relative humidity, % |
There must be no |
|
| 6 | Output frequency, Hz |
0.5-5 |
|
| 7 | Ingress Protection Rating |
IP 54, IK 09 |
|
| 8 | The power supply parameters |
Any options on |
|
| 9 | Dimensions, mm | length |
800 |
| width |
800 |
||
| height |
2000 |
||
| 10 | Weight, kg |
500 |
|
- full automation;
- intelligent hardware;
- compact size;
- low power consumption;
- drying of transformer windings;
- windings overheating protection.
Equipment configurations that are not included in this configurator can be implemented via a separate request to [email protected].
LFD GlobeCore device can be used for:
- drying of electricity network distribution transformers;
- drying of power transformers at electric power plants;
- drying of traction transformers in electric trains;
- drying of mining power transformers;
- drying of marine transformers;
- drying of electric oven transformers;
- drying of step-up transformers in wind power plants;
- drying of transformers for the oil and gas industry which are used in oil and gas production complexes to power the extra heavy-duty equipment;
- drying of transformers used in airports to power the lighting, navigation systems and other critical equipment;
- drying of transformers for irrigation systems used in the agricultural sector to power the pumps and other equipment in large outdoor areas;
- drying of transformers used in medical institutions to power the medical equipment that requires a stable power supply;
- drying of transformers used in railway signaling and communication systems to power the safety and communication systems on railways;
- drying of transformers used in the subway to power the underground electricity supply systems, including the lighting, ventilation systems and escalator drives;
- drying of seaport infrastructure transformers used to power the marine cranes, dock loaders, and other waterfront equipment;
- drying of transformers for water treatment plants that power the pumps, aeration systems, and other equipment used for water treatment;
- drying of transformers used in the chemical industry to power the equipment at the chemical factories producing a variety of chemical substances and materials;
- drying of transformers used to power the mining equipment, especially in underground settings where it is important to have a reliable and safe power supply;
- drying of transformers for lighting of large sports arenas which ensure powerful and reliable lighting for sporting events at night;
- drying of transformers used to power the traffic control systems, including the traffic lights, information boards, and other сomponents of the traffic infrastructure;
- drying of transformers used for power supply to hospitals and other medical institutions;
- drying of transformers used to power the data processing centers (data centers);
- drying of transformers used for power supply to military bases and national security facilities;
- drying of transformers used for power supply to emergency response systems and rescue services, including the fire-fighting stations, police stations, and emergency medical services;
- drying of transformers used for power supply to telecommunication towers and centers;
- drying of transformers used for power supply to banks and financial institutions.
Equipment configurations that are not included in this configurator can be implemented via a separate request to [email protected].