Free Partial Discharge Frequency Converter
Free Partial Discharge Frequency Converter is suitable for inductive pressure-resistant test, local discharge test and series resonant test. With the isolation of boost transformers, reactors, bureau putter, etc. to form a voltage standing test system.
Free Partial Discharge Frequency Converter adopts the principle of linear power amplification to convert the standard sine wave signal of variable frequency into a high-power Test Power Supply, the waveform distortion is small, and the local discharge is less than 10pC to meet the needs of local partial discharge voltage stand test.
Free Partial Discharge Frequency Converter is small in size and light in weight, and can be moved, suitable for field use.
Power supply has multiple protection measures such as lack of phase protection, under voltage protection, overvoltage protection, temperature protection, short circuit protection, overcurrent protection, power protection and so on. When any of the protective actions, the power supply immediately reduces the output voltage to 0 and disconnects the main circuit power supply at the same time, ensuring the safety of the test.
The controller and the power supply section are connected by fiber optic to ensure that the users are completely isolated from the high voltage.
Choose the fan and the heat sink with a large thermal area, and use a reasonable air duct design to ensure that the power supply at the rated power for a long time.
FEATURES
1. For voltage transformer induction voltage stand test and partial discharge test.
2. For power transformer induction voltage stand test and partial discharge test.
3. As a power supply for series resonant test equipment, it is used for voltage stand test and partial discharge test for high-voltage equipment such as circuit breaker, GIS, voltage transformer, current transformer, bushing, power cable and so on.
4. With the start and stop button, when the boost circuit appears abnormal, press the stop button, the system immediately back to zero, cut off the main circuit, protects the safety of the test person and the tested device.
5. The variable frequency power supply has manual mode, manual boost, automatic tuning,
Main Spec.:
| model | 331000 | 332500 | 334000 | 336000 | 338000 | 331600 |
| Capacity（KVA） | 100 | 250 | 400 | 600 | 800 | 1600 |
| Input | Voltage | 400V±15% 3phase 4wires or 3phase 5wires |
| Frequency | 45-65Hz |
| Power Factor | ≥0.90 |
| Output | Voltage | 0-690Vac |
| Frequency | 20-300Hz |
| Frequency Stability | ≤0.01%(0-100% when load are changing, output frequency are not changing ) |
| Partial discharge | ≤10pc |
| Load Stability | ≤3%(100% pure resistance load) |
| Overload Ability | 110% 1hour ,150% 10minutes |
| Wave Distortion | Pure sine wave，THD≤3% |
| Efficiency | ≥90%(100% loads) |
| Display | Input/output voltage/ frequency,3phase phase voltage/current,active power .working time.history error etc. |
| Control mode | IGBT/SPWM Pulse width adjustment mode |
| Protection Class | IP20 |
| Insulation Reactance | >2MΩ |
| Pressure endurance Insulation | 1800Vac/5Ma/1minute |
| Noise Level | 50dBA @1meter |
| Cooling Model | Converter:heat pipe cooling transformer:Compulsive fan cooling |
| Protection Function | The output power supply have perfect protection function of over voltage, over current, short circuit, converter overheat . Consider the different control of the ship's electricity load, when the output load capacity reach the set value,will alarm, so as to control the electricity load |
| Environment | -10℃~+50℃ and 0~90% |
| Indoor Dimension (W×L×H)mm | 1450*850*1880 | 1910*1160*1880 | 3100*830*2260 | 4100*830*2260 |
