Product parameters:
No partial discharge variable frequency power supply can be used for AC withstand voltage testing and partial discharge testing of all electrical equipment. By using an excitation transformer to excite a series or parallel resonant circuit, and adjusting the output frequency of the variable frequency power supply, the reactor inductance L and the sample capacitance C in the circuit resonate, and the resonant voltage is the voltage applied to the sample. Or directly output to the primary of the transformer through an intermediate transformer for induction withstand voltage testing.
Technical parameters:
Rated input voltage | Three phase AC 380V ± 10%, 50Hz |
Rated output power | Single phase 100kW |
Output frequency range | 20Hz～300Hz， Continuing Adjust |
Rated output voltage | 0～350V， Continuing Adjust |
Output current | 0～285A， Continuing Adjust |
Frequency instability | ≤0.05% |
Voltage instability | ≤1.0% |
Nonlinear distortion degree | ≤1% |
Partial discharge capacity | ≤ 10pC (measured on the high voltage side of the boost converter) |
Feature:
1. The equivalence of the experiment is good. The output of this device is a sine wave with low waveform distortion. The waveform distortion rate is less than 3%, which is different from other types of variable frequency power supply devices (other types of variable frequency power supply devices output square waves, which are shaped into sine waves). So, during the testing process, this device does not need to measure peak values.
2. By using fiber optic control, the high and low voltage control circuits are completely isolated.
3. Small size, light weight, flexible handling, very suitable for on-site use.
4. The operation is simple and convenient, the wiring is simple, and it can improve work efficiency by 50% (compared to the generator set method).
5. Safe and reliable, this device integrates multiple protections. Including: discharge breakdown protection, overvoltage setting protection, output short circuit protection, startup zero position protection, bridge arm amplification circuit protection, power curve protection, etc. When any type of protection occurs, the device immediately disconnects the test voltage output, cuts off the main circuit power supply, and ensures the safety of the test personnel, test subjects, and test system
6. The signal source in this device is generated by a dedicated chip and controlled by a microcomputer. The output frequency is highly stable and can reach 0.01Hz.
7. The variable frequency output voltage is controlled by TI's high-speed microcomputer, and the instability of the output voltage is less than 1%.
Routine maintenance:
1. Try to avoid prolonged operation of the variable frequency power supply device under severe detuning conditions.
2. Regularly check the internal wiring and screw fastening of each contact of the frequency conversion cabinet device to prevent loosening.
3 . This device should be stored in a dry, clean area that is not easily exposed to rain. When not in use, cover with a dust cover to prevent dust from entering the cabinet through the air duct.
4 . During transportation, the frequency conversion cabinet is secured with specialized straps to prevent loosening and slipping.
5. The display screen of the control box should not be exposed to direct sunlight. The control box should have anti vibration measures during transportation.
6. The connectors in the device are prone to damage and should be used carefully to prevent blockage by dirt.
7. When using fiber optic cables, be careful to prevent them from bending, twisting, or squeezing; And stay away from sources of fire. When using the plug, align it with the positioning notch and do not apply too much force. After use, the fiber optic cable should be properly stored and placed in an appropriate location to prevent moisture.
