Automatic Four-Channel Dielectric Loss Tester Product Introduction:
The Automatic Four-Channel Dielectric Loss Tester is used for on-site anti-interference dielectric loss measurement, or for precise dielectric loss measurement in the laboratory. The instrument has an integrated structure, built-in dielectric loss bridge, variable frequency power supply, test transformer, and standard capacitor, etc..It adopts variable frequency anti-interference and Fourier transform digital filtering technology, fully automatic intelligent measurement, and the measurement data is very stable under strong interference. The measurement results are displayed on a large screen LCD, and a built-in micro printer can print output.
Product Features of Automatic Four-Channel Dielectric Loss Tester:
◆ Variable Frequency Anti-Interference: Using variable frequency anti-interference technology, it can still measure accurately under 200% interference, and the test data is stable, suitable for on-site anti-interference dielectric loss tests.
◆ High-Precision Measurement: Using technologies such as frequency floating, digital waveform analysis, and bridge self-calibration, combined with a high-precision three-terminal standard capacitor, it achieves high-precision dielectric loss measurement, and the accuracy and stability of positive/reverse wiring measurement are * (excellent). The input resistance of all ranges of the instrument is less than 2Ω, eliminating the influence of additional capacitance of test leads. It can be externally connected to an oil cup for precise insulating oil dielectric loss tests, and can be externally connected to solid material measurement electrodes for precise insulating material dielectric loss tests.
◆ Strong Applicability: Automatically identifies 50Hz/60Hz system power supply, supports generator power supply, and can measure normally even with large frequency fluctuations. It has built-in series and parallel dielectric loss measurement models, fully compatible with calibration benches and dielectric loss standards, facilitating instrument verification.
◆ Multi-level safety protection to ensure personal and equipment safety
High-voltage protection: In case of short circuit, breakdown, or high-voltage current fluctuation of the test object, it can cut off the output at high speed in a short-circuit manner.
Low-voltage protection: In case of misconnection of 380V, power fluctuation, or sudden power outage, it activates protection and will not cause overvoltage.
Ground protection: When poor grounding causes dangerous voltage on the shell, it activates ground protection.
C V T: Four protection limits for high voltage and current, low voltage and current, will not damage equipment; mis-selection of menu will not output excitation voltage. No 10kV high-voltage output during CVT measurement.
Anti-misoperation: Two-level power switch; real-time monitoring of voltage and current; multiple key confirmations; clear distinction between high and low voltage terminals; slow voltage rise, rapid voltage reduction, audible and visual alarm.
Anti-"capacitive rise": When measuring large-capacity test objects, the "capacitive rise" effect of voltage increase may occur. The instrument can automatically track the output voltage to keep the test voltage constant.
Shock resistance: The instrument adopts a unique shock-resistant design, which can withstand strong vibration and bumping during long-distance transportation without damage.
High-voltage cable: It is a high-voltage resistant insulated wire that can be used on the ground.
◆ Powerful Functions
(1) It has multiple working modes: positive/reverse wiring, internal/external standard capacitor, internal/external high voltage, and an integrated structure. It can perform various conventional dielectric loss tests without any external auxiliary equipment.
(2) It has a four-channel positive wiring mode, convenient for transformer bushing dielectric loss tests.
(3) It has an external standard capacitor interface, automatically tracks the external test power frequency of 40Hz~70Hz, and supports power frequency power supply and series resonant power supply for large-capacity high-voltage dielectric loss tests.
(4) It has a loop poor contact discharge indication function to facilitate judging whether the wiring is reliable.
(5) It has CVT self-excitation method measurement function. C1/C2 can be measured simultaneously with one wiring, automatically compensating for the voltage division effect of bus grounding and standard capacitor, without changing wires or connecting any external accessories, and the high-voltage connecting wire can be dragged on the ground.
(6) It has CVT ratio function, which can measure CVT ratio, polarity, and phase error.
(7) It has reverse wiring low-voltage shielding function. Under the condition of 220kV CVT bus grounding, it can perform 10kV reverse wiring dielectric loss measurement on C11 without disassembling wires, and can measure both main and slave capacitors with one wiring.
(8) Chinese graphic menu, large screen backlit LCD display.
(9) Configured with thermal printer, printing data clearly and quickly, no noise.
(10) With calendar clock, can store 256 sets of measurement data.
(11) With computer interface. Through this interface, measurement, data processing, and report output can be achieved, and the internal measurement software of the instrument can also be upgraded.
