A kind of multi-lightning current action load test method of surge protector
A surge protector and load test technology, applied in the direction of instruments, measuring electricity, measuring electrical variables, etc., can solve the problem of not being able to simulate the effect of lightning strikes, failing to achieve overvoltage protection, and not considering the accumulation of electric power and thermal effects of multi-pulse currents, etc. problem, to achieve the practical effect of the experimental method
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[0031] according to figure 1 Content, the surge protector multiple lightning current operating load test method of the present invention, the method includes the following steps:
[0032] Step 1: Record that the ambient air pressure in the laboratory is 102kPa, the temperature is 25°C, and the relative humidity is 45%. Select 20 pieces of low-voltage MOV valves for Class I surge protectors as test samples, the model is LS40K275QE7PK2, and its 8 / 20μs The nominal discharge current of the impulse current wave is 20kA, the maximum pulse discharge current (Iimp) of 10 / 350μs is 6500A, the length is 37.5mm, the width is 39mm, the height is 11.6mm, and the maximum continuous working voltage is 275V.
[0033] Step 2: Measure the residual pressure and The method of DC reference voltage, measuring the residual voltage (Ur) of the valve under the nominal discharge current is 1090V, the DC reference voltage (UDC1mA) when the DC reference current is 1mA is 418V, the freewheeling peak value...
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