What factors will affect the test results in the Variable Frequency AC Resonant Test Systeme withstand voltage test
12
04-2024
What factors will affect the test results in the Variable Frequency AC Resonant Test Systeme withstand voltage test
There are the following related factors that affect the Variable Frequency AC Resonant Test System withstand voltage test:
1.Under resonant conditions,XL=XC,the impedance of the circuit decreases and decreases
Resistance to the circuit.Namely,Zr=R
2.Under resonant conditions,the current in the circuit increases as the impedance of the circuit decreases.That is,Ir=V/Zr=V/R
3.As a result,due to the increase in resonant current Ir,the power consumption of the circuit also increases.Pr=I2Rr
4.Under resonant conditions,the circuit draws a very large current,or it can be said that it draws a relatively large current.Therefore,the voltage drop at both ends of the inductor Lie(VL=IXL=Ix2πfrL)and the capacitor Cie(VC=IXC=IxI/2πfrC)will also be very large.
5.The influence of high-voltage leads
When conducting AC withstand voltage tests on a single electrical equipment,due to the small capacitance of the test product,the influence of high-voltage wires on the test is minimal.When conducting AC withstand voltage tests on outdoor distribution equipment as a whole,the installation height of the equipment increases with the increase of voltage level.The higher the voltage,the longer the high-voltage lead.Generally,the longer the high-voltage lead,the higher the corona loss and the equivalent resistance of the circuit.The stray capacitance formed by the stray capacitance is connected in parallel with the measured capacitance,resulting in a decrease in the resonant frequency of the circuit and a decrease in the q value.At the same time,the interference of the surrounding electromagnetic field increases,resulting in a decrease in q value.Therefore,when conducting AC withstand voltage tests on high-voltage electrical equipment,it is advisable to use high-voltage leads of corrugated pipes as much as possible.
6.The impact of weather
Under high humidity conditions,the corona loss of the leads greatly increases,the interference of the surrounding electromagnetic field increases,and the q value decreases.When the circuit temperature is high,the equivalent resistance of the circuit greatly increases,thereby reducing the Q value.
7.The impact of experimental time
As the test time prolongs,the equipment is heated,the equivalent resistance increases,and the q value also shows a downward trend.This phenomenon is very significant on hot days,and the equipment usually needs 30 minutes of rest to continue using.
1.Under resonant conditions,XL=XC,the impedance of the circuit decreases and decreases
Resistance to the circuit.Namely,Zr=R
2.Under resonant conditions,the current in the circuit increases as the impedance of the circuit decreases.That is,Ir=V/Zr=V/R
3.As a result,due to the increase in resonant current Ir,the power consumption of the circuit also increases.Pr=I2Rr
4.Under resonant conditions,the circuit draws a very large current,or it can be said that it draws a relatively large current.Therefore,the voltage drop at both ends of the inductor Lie(VL=IXL=Ix2πfrL)and the capacitor Cie(VC=IXC=IxI/2πfrC)will also be very large.
5.The influence of high-voltage leads
When conducting AC withstand voltage tests on a single electrical equipment,due to the small capacitance of the test product,the influence of high-voltage wires on the test is minimal.When conducting AC withstand voltage tests on outdoor distribution equipment as a whole,the installation height of the equipment increases with the increase of voltage level.The higher the voltage,the longer the high-voltage lead.Generally,the longer the high-voltage lead,the higher the corona loss and the equivalent resistance of the circuit.The stray capacitance formed by the stray capacitance is connected in parallel with the measured capacitance,resulting in a decrease in the resonant frequency of the circuit and a decrease in the q value.At the same time,the interference of the surrounding electromagnetic field increases,resulting in a decrease in q value.Therefore,when conducting AC withstand voltage tests on high-voltage electrical equipment,it is advisable to use high-voltage leads of corrugated pipes as much as possible.
6.The impact of weather
Under high humidity conditions,the corona loss of the leads greatly increases,the interference of the surrounding electromagnetic field increases,and the q value decreases.When the circuit temperature is high,the equivalent resistance of the circuit greatly increases,thereby reducing the Q value.
7.The impact of experimental time
As the test time prolongs,the equipment is heated,the equivalent resistance increases,and the q value also shows a downward trend.This phenomenon is very significant on hot days,and the equipment usually needs 30 minutes of rest to continue using.
