High-Voltage Insulation Resistance Tester

I. Overview

This series of instruments can measure the insulation strength and other technical indicators of the tested equipment or materials. It is widely used for voltage withstand tests of electrical equipment, appliances, transformers, power cables, electricity meters, motors, power outlets, and cable wires. It is also suitable for voltage withstand tests of household appliances such as televisions, fans, tape recorders, refrigerators, washing machines, microwave ovens, and hair dryers, as well as for electronic integrated machines such as instruments and meters. It provides testing methods for the implementation of national safety standards, thereby highlighting its importance. It has become an indispensable instrument and equipment for scientific research institutions, metrology testing departments, and the electronics industry for testing electronic instruments and household appliances, in compliance with the GB4706.1 standard.

This series of instruments boasts an aesthetically pleasing design and user-friendly operation. The output voltage is clearly displayed on a digital panel, ensuring accuracy, clarity, and intuitiveness. The entire unit features advanced technology, logical layout, and advantages such as high accuracy, reliability, and ease of maintenance.

Section II: Key Technical Indicators and Parameters

Test Voltage AC: 0～5 (kV)

Voltage Accuracy: 0.5～5 (kV) ≤ ±5%

Leakage Current Range: AC: 0～20 (mA)

Leakage Current Accuracy: AC: 0.2～20 (mA) ≤ ±5%

Output a 50Hz sine wave or DC waveform

Transformer Power: 300VA

Time Control: Digital display 1-99 (s) ±5%, manual control ∞, any preset

Display Mode: Test Voltage, Leakage Current, and Time Fully Displayed

Test Results: Pass/Fail - Non-passing with Audio-Visual Alarm

Relative Humidity: ≤75%RH, Environmental Temperature: 0℃～40℃

No strong electromagnetic field interference sources nearby; no large amounts of dust and corrosive gases; good ventilation.

Approx. 25 kg

Volume: 320×255×175

AC Power: 220V ±10%, 50Hz ±5%

III. Working Principle

Relay: This electrical device controls whether the 220V power is connected to the regulator, thereby controlling the connection or disconnection of the high-voltage output.

(2) Voltage Regulator: Primarily composed of a voltage reducer, the change in voltage is achieved through the regulation of this reducer.

(3) High Voltage Transformer: By adjusting the voltage regulator knob, the input voltage of the high voltage transformer is increased, from which high voltage is obtained. Direct AC voltage output

(4) Current Detector: This section of the circuit converts the current passing through the item being measured into voltage, compares it with a reference voltage, and then outputs a detection signal to the controller.

(5) Controller: Based on signals from the current sensor and the start, reset button, and timer, controls the relay's connection and whether the alarm circuit triggers an alarm.

(6) Timer: After pressing the start button, the output high voltage is connected, and the timer begins to countdown. Once the timer reaches the set time, the control circuit disconnects the high voltage, thereby achieving the purpose of timed testing.

(7) Alarm: During the testing process, when the leakage current exceeds the preset leakage current, the driver block activates the buzzer and the over-leakage indicator to emit an audible and visual alarm, simultaneously cutting off the high voltage.