The water withstand voltage testing machine can test the insulation strength of the tested instruments or materials and other technical indicators. It is widely used in the withstand voltage testing of electrical equipment, electrical appliances, transformers, power lines, watt-hour meters, motors, power plugs, cables and so on. It is suitable for household appliances such as TV sets, fans, recorders, refrigerators, washing machines, microwave ovens, electric driers, and other appliances as well as instruments and instruments. The withstand voltage test of the whole machine has provided a test means for the implementation of the national safety standards, thus showing its importance. It has become an indispensable instrument and equipment for scientific research institutions, measurement and testing departments and electronic industry in the detection of electronic instruments and household appliances, which conforms to the "GB4706.1-2005" standard.

The instrument has beautiful appearance and easy operation. The output voltage is displayed by digital panel table, which is clear, intuitive and accurate. The whole machine has advanced technology, reasonable layout, high accuracy, good reliability, convenient maintenance and other advantages.

Test voltage:AC 0-10 (kV)

Voltage accuracy:0.5-10(kV)<5%

Leakage current range:AC 0-200 (mA)

Leakage Current Accuracy:AC 0.2~200(mA)<5%

Output waveform:50Hz sinusoidal waveform or DC

output power:3000VA

time control:Arbitrary Preset of Digital Display 1-9999(s)+5%

Display mode:5 inch color touch screen

Test discrimination:Acousto-optic Alarm for Qualified/Unqualified

Environmental requirements:

Relative humidity: <75%RH ambient temperature: 0℃~40℃

There is no strong electromagnetic interference source around.

No large amount of dust and corrosive gas;

Well ventilated

Static power consumption:Static Power Consumption <30VA

Weight:About 120kg

Volume:1050mm x 720mm x 1060MM

Power Supply:AC 380/220V+10%50Hz+5%

Working principle block diagram:

Figure 1: Electrical schematic diagram of high voltage part

Figure 2: Low Voltage Control Principle

Figure 3: Temperature control schematic diagram

Each part of the block diagram explains:

(1) Contactors: The electrical apparatus controls whether 220V/380V power supply is connected to the voltage regulator, thereby controlling the switch-on or cut-off of the output high voltage.

(2) Voltage regulator: It is mainly composed of a voltage regulator. The change of voltage is realized by the regulation of the voltage regulator.

(3) High-voltage transformer: adjust the voltage regulator twist, increase the input voltage of high-voltage transformer, and get high voltage from it. AC voltage output directly, DC voltage output at transformer secondary 0.707 taps after half-wave rectification filter.

(4) Current transformer: This part of the circuit converts the current flowing through the measured part into voltage, compares it with the reference voltage, and then outputs a detection signal to the controller.

(5) Controller: According to the signal from the current detector and the running and resetting button timer, it controls whether the contactor is connected and whether the alarm circuit is alarmed.

(6) Timer: After pressing the startup button, the output high voltage is connected, the timer starts to set time, and after the timing time arrives, the high voltage is disconnected through the control circuit, so as to achieve the purpose of timing test.

(7) Alarm: In the test process, when the leakage current exceeds the preset value of the leakage current, the buzzer and the over-leakage lamp are driven by the driving block to give out sound and light alarm, and the high voltage is automatically cut off.

(8) Temperature sensor 0-100 C.