설명

KV-7500 Automatic dissipation factor and capacitance tester

Overviews

Transformer Capacitance and Tan-Delta Tester is a advanced, fully automatic device for on-site measurement of dielectric loss/dissipation factor(tgδ) and capacitance (Cx) in electrical equipment. It is ideal for use with transformers, insulating bushes, CT/PTs, Capacitors, MOAs, and similar devices.

Feature

• Adopts Fourier transform digital filtering technology for precise capacitance and dielectric loss measurements, enabling automatic and accurate results.
• Frequency conversion technology in the instrument eliminates 50Hz power frequency interference, ensuring reliable data in areas of strong electromagnetic interference.
• The full touch LCD is user-friendly, with a comprehensive graphical interface that makes the operation clear and simple, allowing operators to measure processes via touch without specialized training.
• Data storage is facilitated by a calendar chip and ample memory, allowing for immediate result saving, historical record viewing, and printout with current and logged times
• The instrument’s operation and easurement process is microprocessor-controlled, automating data measurement once the correct mode is selected.
• The integrated design includes a standard capacitor and high-voltage power supply, making field testing convenient and reducing on-site wiring.
• The instrument’s high accuracy fulfills the requirements for measuring oil dielectric loss, necessitating only a standard oil cup and tesing line.
• It features low-voltage shielding for reverse wiring, allowing for dielectric loss measurement of 110 kV reverse wiring under 220 kV CVT bus grounding without disconnection.
• It can conduct AC voltage withstand tests, useful for PT and CT secondary voltage endurance tests and 400V low voltage systems.
• The instrument recognizes external high-voltage power supply frequencies from 40Hz to 70Hz, accommodating large capacity and high voltage dielectric loss tests with power frequency or series resonant power supplies.
• It has a CVT test function, enabling self-excitation tests with four high/low voltage/current protection settings for safety.
• When testing CVTs, it automatically measures the capacitance and dielectric loss of C1 and C2, as well as the total values for the equipment.
• It includes a thermal printer for immediate report generation, with a built-in calendar and USB output for convenience.
• Grounding protection prevents high voltage output when grounding is insufficient or absent, and overcurrent protection safeguards the instrument against sample short-circuits or breakdowns.
• An electric shock protection feature immediately cuts off high voltage in case of operator contact, ensuring tester safety.

Technical Specifications: