I. YD2000Series Resonance Withstand Voltage Test Complete EquipmentApplication Scope
The variable frequency series resonance complete test equipment operates on the principle of series resonance, using an excitation transformer to excite the series resonance circuit. By adjusting the output frequency of the variable frequency controller, the reactor inductance L in the circuit and the test object capacitance C achieve series resonance, and the resonance voltage is the voltage applied to the test object. The variable frequency resonance test equipment is widely used in industries such as electric power, metallurgy, petroleum, and chemical, and is suitable for acceptance and preventive tests of capacitive test objects with large capacity and high voltage.
Strategically visionary Shanghai Xuji expanded its business into the water industry, beginning cooperation with the global centrifuge manufacturer - Germany's Westfalia Centrifuge Company. In just four years, the Maige Group achieved a leap from zero to prominence in the field of sludge solid-liquid separation. Since 2003, Shanghai Xuji has maintained a leading market share, reaching 30%, becoming China's leading supplier of imported centrifuge dewatering equipment.
Suitable for AC withstand voltage tests of 10KV, 35KV, 110KV, 220KV, and 500KV cross-linked polyethylene power cables.
Suitable for AC withstand voltage tests of 66KV, 110KV, 220KV, 500KV, and GIS.
Suitable for power frequency withstand voltage tests of large generator sets and power transformers.
Suitable for induced withstand voltage tests of power transformers.
II. YD2000Series Resonance Withstand Voltage Test Complete EquipmentMain Performance Indicators and Features
2.1 Main Technical Indicators
(1) Operating temperature range: -10~45℃
(2) Operating humidity range: ≤90%
(3) Altitude: ≤1000m
(4) Power supply voltage: 380V±10%, three-phase or 220V±10%, single-phase (10KW and below)
50/60Hz
(5) Power supply capacity: 0-100KW
(6) Rated output voltage: 0-500KV
(7) Rated output capacity: 0-200KVA
(8) Operating frequency range: 30-300Hz (frequency range can also be widened according to user requirements)
(9) Frequency adjustment resolution: 0.02Hz; Instability ≤0.05%
(10) Noise: ≤60dB
(11) System measurement accuracy: Class 1
(12) Output waveform: sine wave, waveform distortion rate ≤1%
(13) Reactor Q value: 30-120
(14) The system has fully automatic protection for IGBT, overvoltage, overcurrent, test object flashover, etc.
2.2 Main Features
2.2.1 Small size, light weight, suitable for on-site use
The variable frequency controller integrates voltage regulation, frequency adjustment, control, and protection functions, eliminating the need for bulky voltage regulators, and is easy to operate with intuitive readings. Due to the high Q value of the system (30-120), it effectively solves the constraints of insufficient power supply capacity on on-site tests. When the voltage level is high, the reactor adopts a multi-stage or stacked structure, which is convenient for transportation and on-site installation.
2.2.2 High installation reliability
The variable frequency device adopts advanced design concepts, high-quality IGBTs, and drive circuits, resulting in low output waveform distortion, good frequency output stability, and excellent IGBT, overcurrent, overvoltage (protection values can be manually set as needed), and discharge protection functions, ensuring the safety of equipment and personnel. When the test object discharges or breaks down, due to the destruction of the resonance condition, the short-circuit current is small, only 1/Q of the test object's test current, avoiding damage to the test object caused by breakdown.
2.2.3 Good test equivalence
Using AC voltage close to power frequency (30Hz-300Hz) as the test power supply, it is very close to the 50Hz/60Hz power frequency in both equivalence and consistency, ensuring the reliability and authenticity of test results.
III. YD2000Series Resonance Withstand Voltage Test Complete EquipmentWorking Principle and System Configuration 3.1 Working Principle
