Reference standard: GB50150-2006, DL / T849.6-2004 Introduction DBXZ family series resonant frequency series resonant test device is the use of the principle, the use of excitation transformer series resonant excitation circuit, inverter controller to adjust the output frequency to the loop inductance L and sample C series resonance, the resonant voltage is the voltage applied to the sample. Resonant frequency test equipment is widely used in electric power, metallurgy, petroleum, chemical industry, for large capacity, high voltage capacitive transfer test and preventive tests. DBXZ series frequency series resonant test device consists of variable frequency controller, excitation transformers, high-voltage reactors, high voltage divider and other components. Inverter controller is divided into two categories, 20KW and above the control desk, 20KW following portable box; it by the controller and filter. Frequency controller main role is to amplitude and frequency are constant 380V or 200V AC power into frequency sinusoidal amplitude and frequency adjustable sine wave. And provide power for the entire device. The role of the excitation frequency power transformer is the output voltage rises to the appropriate test voltage. Reactors L is an important component of the resonant circuit, when the power supply frequency is equal to 1 / (2π√LCX), it happened with the test CX series resonance. Series resonant frequency test equipment suitable for 10KV, 35KV, 110KV, 220KV, 500KV power cables polyhexene AC voltage test. Suitable for 60KV, 220KV, 500KV AC voltage withstand test of GIS. For large transformers, generators frequency voltage withstand test; power transformer sensing pressure test; earth resistance measurement. Features 1, the required power capacity is greatly reduced, the test is only required to test the capacity of the power supply 1 / Q. 2, small size, light weight, usually ordinary test device 1 / 3-1 / 5; 3, the resonant frequency modulation and power supply components using the most advanced Japanese imports of high-quality components, designed to be resonant filter circuit, can improve the output voltage waveform distortion, get a good sine wave, effectively prevent the misuse of harmonic peaks of the sample breakdown. 4, power inverter protection, good stability; possess with automatic (auto-tuning, automatic boost), full manual (manual tuning, manual boost) and semi-automatic (automatic tuning, manual boost and manual tuning, automatic liter pressure) of a variety of operating modes, you can switch back and use; easy to operate; with 220V or 380V single-phase power supply, convenient spot to take power. 5, configuration flexibility, and strong extensions. Resonance reactor using multi-mode only, modular combination of string can and can meet the test requirements of a variety of test items, and more convenient for field use. 6, large-screen LCD color touch LED and an external mouse is done directly set various parameters, test results can be saved, printed, upload, back check and so on. Technical parameters 1, ambient temperature: -10 ℃ ~ 45 ℃ 2, Humidity: ≤90% 3, Altitude: ≤3000m 4, Power input: 380V ± 10% three-phase or single-phase 220V ± 10% (10kW or less) , 50Hz 5, rated test capacity: 0 ~ 5000kVA 6, resonant voltage: 0 ~ 1000kV 7, frequency adjustment range: 20 ~ 300Hz 8, system measurement accuracy: 1.0 9, frequency adjustment resolution: 0.01Hz 10, instability : ≤0.05% 11, the output waveforms: sine 12, waveform distortion: ≤0.5% 13, the noise: ≤60dB 14, chokes Q: 30 ~ 9015, working system: full power output, continuous working time 60min