Transformer Dielectric Loss Tester is a precision measuring instrument designed specifically for high-voltage power equipment, mainly used to evaluate the dielectric loss tangent (tan δ) and capacitance (Cx) of transformers, transformers, bushings, and other equipment. This device adopts advanced frequency conversion anti-interference technology, which can operate stably in complex electromagnetic environments, ensuring high accuracy and reliability of data. It is the core tool for insulation detection and preventive maintenance of power systems.

Core product features
Intelligent anti-interference technology
Using frequency conversion method (45Hz/55Hz/65Hz) to eliminate 50Hz power frequency interference, adapt to complex electromagnetic environments, and ensure data stability.
Support external voltage and standard capacitance (CN) measurement to meet diverse testing needs.
Multi functional integrated measurement
CVT self-excited method test: One wiring can simultaneously measure the C1 and C2 capacitance and dielectric loss values of the CVT, improving efficiency.
Multi channel testing: Supports synchronous measurement of four channels and can simultaneously test the dielectric loss values of four test samples (such as transformer three-phase bushings).
LCR measurement: It can perform high-precision measurements on inductance (L>20H), capacitance (Cx), and resistance (R>10k Ω).
Insulation resistance testing: supports the measurement of polarization index (PI), absorption ratio (DAR), and insulation resistance (IR).
Safety and Convenience Design
Reverse wiring low voltage shielding: When the CVT bus is grounded, the 10kV reverse wiring dielectric loss measurement (C11) can be completed without disconnecting the wire.
Overcurrent protection: automatically cuts off the output when the test sample is short circuited or broken down, protecting the safety of the equipment.
Integrated structure: Built in standard capacitors and high-voltage power supply, reducing on-site wiring complexity and making it easy to carry (host weight 25.75kg).
Intelligent operation
Chinese menu interaction: Large screen LCD display, intuitive operation interface, supports switching between Chinese and English.
Automated measurement: Microcomputer controlled full process measurement, one click data acquisition and calculation, no need for manual conversion.
Data management: Supports exporting 200 sets of test data from USB flash drives, and can be analyzed and reported through dedicated software

Technical Parameter
Usage conditions: -15 ℃ to 40 ℃; RH＜80%
Anti interference principle: frequency conversion method
Power supply: AC 220V ± 10%; Allow generator
High voltage output:
0.5kV to 10kV: every 0.1kV
Accuracy: 2%
Maximum current: 200mA
Capacity: 2000VA
Self excitation power supply: AC 0V ∽ 50V/40A
Single frequency: adjustable from 45.0Hz to 65.0Hz;
Dual frequency: 45.0HZ/55.0HZ 47.5HZ/52.5HZ; 55.0HZ/65.0HZ   57.5HZ/62.5HZ
Resolution: tg δ: 0.001%; Cx: 0.001pF
Accuracy: △ tg δ: ± (reading * 1.0%+0.040%); △ Cx: ± (reading * 1.0%+1.00PF)
Measurement range:
TG δ unlimited
Cx：15pF ＜ Cx ＜ 300nF；
10kV：Cx=(Cx1+Cx2+Cx3+Cx4)＜60 nF；
5kV：Cx=(Cx1+Cx2+Cx3+Cx4)＜150 nF；
1kV：Cx=(Cx1+Cx2+Cx3+Cx4)＜300 nF
CVT test: Cx=(Cx1+Cx2+Cx3+Cx4) ＜ 300 nF
LCR measurement range: inductance L>20H (2kV); Resistance R>10K Ω (2kV)
LCR measurement accuracy: 1%; Angle resolution: 0.01
CVT ratio range: 10-10000; Phase testing range: 0 ° to 359.999 °
CVT ratio accuracy: 1%; CVT ratio resolution: 0.01
Dimensions (Host) (mm): 40cm * 29cm * 33cm
Dimensions (Attachment) (mm): 45cm * 33cm * 15cm
Memory size: 200 sets support USB data storage
Weight (host): 25.75kg
Weight (accessory box): 33.44kg