Structural Composition Of Withstand Voltage Tester

1. Boost part
It is composed of a voltage regulating transformer, a step-up transformer and a power on and off switch for the step-up part.
The 220V voltage is added to the voltage regulating transformer through the switch on and off, and the output of the voltage regulating transformer is connected to the step-up transformer. Users only need to adjust the voltage regulator to control the output voltage of the step-up transformer.
2. Control part
Composed of current sampling, time circuit and alarm circuit. When the control part receives the start signal, the instrument immediately connects the power supply of the booster part. When the measured circuit current exceeds the set value and an audible and visual alarm is issued, immediately cut off the power supply of the booster circuit. Cut off the power supply of the boost circuit after receiving a reset or time-out signal.
3. Display circuit
The display shows the output voltage value of the step-up transformer. Display the current value of the current sampling part, and the time value of the time circuit is generally a countdown.
4. Program-controlled pressure tester
The above is the structural composition of the traditional withstand voltage tester. With the rapid development of electronic technology and single chip, computer technology; the program-controlled withstand voltage tester has also developed rapidly in recent years. The difference between the program-controlled withstand voltage tester and the traditional withstand voltage tester is mainly the boosting part. The high-voltage boost of the program-controlled voltage withstand instrument is not adjusted by the voltage regulator through the mains, but a 50Hz or 60Hz sine wave signal is generated through the control of the single-chip computer, and then amplified and boosted by the power amplifier circuit, and the output voltage value is also controlled by the single-chip computer. It is controlled by a chip computer, and the other parts of the principle are not much different from the traditional voltage withstand instrument.