Wuhan UHV specializes in producingseries resonance (also known as cable withstand voltage test equipment). Next, we will share with you the knowledge of series resonance withstand voltage test device.
Knowledge ofseries resonance withstand voltage test device
What is series resonance used for? The series resonance withstand voltage test device applies the principle of series resonance. By adjusting the output frequency of the variable frequency controller, the reactor inductance L and the sample capacitance C in the circuit undergo series resonance, and the resonance voltage is the voltage applied to the sample. The frequency conversion series resonance test device is widely used in industries such as power, metallurgy, petroleum, and chemical engineering. It is suitable for large capacity, high-voltage capacitive test samples, such as generators, power transformers, GIS and high cross-linking power cables, transformers, bushings, and other handover and preventive tests.
The frequency conversion series resonance test device is mainly designed for 6kV-500kV power transformers. GIS， Switch. Substation capacitive equipment such as busbars, bushings, transformers, 6kV-220kV high-voltage cross-linked cables, AC withstand voltage tests for motors, generators, etc. with export voltage below 20kV, and CVT boost verification tests for voltage levels of 35kV, 66kV, 110kV, 220kV, 330kV, and 500kV.
Series resonance vs. power frequency withstand voltage, meeting the withstand voltage test of large capacity test objects. The volume and weight are much smaller than power frequency withstand voltage, making it easy to carry
Series resonance VS ultra-low frequency is mainly aimed at cables of 10kV/35kV specifications. The series resonance withstand voltage test device can be applied to cables of 10/35/110/220kV specifications, main transformers, generators, etc, CVT, Switches, etc
The series resonance VS value is high, and the "DC withstand voltage" applied by the DC high-voltage generator is high; AC withstand voltage applied by series resonance
How to choose a suitable series resonant device, provide the following technical parameters
Power transformer: voltage level (such as 10/35/110kV specifications, etc.); Maximum capacity; Test nature (neutral point withstand voltage or full insulation withstand voltage) single relative electrical capacity
Power cables: voltage level (such as 10/35/110kV specifications, etc.); Maximum length, cross-sectional area
Generator, electric motor; Voltage level (export voltage or working voltage); Test voltage (maximum withstand voltage); Single phase electric capacity range (such as 0.2-0.55 μ F, etc.)
GIS: Voltage level (or working voltage); Test voltage; (Maximum withstand voltage value); Number of intervals
Switches, insulators PT、CT、 Insulation tools, busbars, voltage level (or working voltage); The highest withstand voltage value of the test voltage.
