Automatic Anti-Interference Dielectric Loss Tester
Overview:
The Automatic Anti-Interference Dielectric Loss Tester is an intelligent instrument for measuring the dielectric loss tangent (tgδ) and capacitance (Cx). It can measure the dielectric loss tangent (tgδ) and capacitance (Cx) of various insulating materials, insulating bushings, power cables, capacitors, transformers, and other high-voltage equipment on-site under power frequency high voltage. The instrument is an integrated structure with built-in standard capacitor and step-up power supply. It is small in size, light in weight, and easy to carry. It has the advantages of simple operation, automatic measurement, direct reading, no conversion, high accuracy, and strong anti-interference capability. It can also be used with external power supply and standard capacitors of various high-voltage levels produced by our factory to measure high-voltage dielectric loss.
Main Features:
1. Automatic and Simple: Simple wiring (two wires for normal connection, one wire for reverse connection), all cables have grounding shielding, so they can be used on the ground. The measurement voltage rises and falls slowly, fully automatic measurement, results are read directly without conversion.
2. Multiple Measurement Modes: Can select normal/reverse wiring, internal/external standard capacitor, and internal/external test voltage for measurement. Normal wiring can measure high-voltage dielectric loss.
3. Shock Resistance: The instrument can withstand strong vibration and bumping during long-distance transportation without damage.
4. Strong Anti-Interference Capability: Adopts automatic tracking interference compensation circuit, combining vector operation method with phase-shifting method to effectively eliminate the influence of strong electric field interference on measurement. Suitable for on-site testing of power stations up to 500kV and below.
5. CVT Measurement: Unique self-excitation method for measuring CVT, no additional equipment needed, can complete measurement of non-detachable CVT. One-time wiring (three cables, no need to change wires), one measurement process (about 1 minute), two final measurement results (dielectric loss and capacitance of C1 and C2). The measurement process is displayed in Chinese, and can monitor the self-excitation current value and test voltage (high voltage) in real time. It can eliminate the influence of leads on the test, and the measurement results are accurate and reliable.
6. Safety Measures:
(1) High Voltage Protection: In case of short circuit, breakdown, or high voltage current fluctuation of the test object, the high voltage output can be quickly cut off.
(2) CVT Protection: Set the overcurrent point of the self-excitation voltage. Once the set current value is exceeded, the instrument automatically exits the measurement without damaging the equipment.
(3) Grounding Detection: The instrument has a grounding detection function. If not grounded, the voltage cannot be increased for measurement.
(4) Misoperation Prevention: Designed to prevent misoperation, can identify common wiring errors and provide safety alarms.
(5) Anti-"Capacitance Rise": When measuring large-capacity test objects, the "capacitance rise" effect may cause voltage increase. The instrument can automatically track the output voltage to maintain a constant test voltage.
7. VFD Display: Uses a novel large-screen VFD dot matrix display, which can display clearly in both severe winter and hot summer. Full Chinese operation menu, with operation prompts and various warning messages, intuitive and clear, no need to consult the manual for operation.
8. The instrument is equipped with a micro printer to print out measurement results and status in Chinese.
9. RS232: The instrument has an RS232 interface, which can be connected to a computer for convenient data statistics, processing, and storage
