Performance characteristics:
1. It has multiple working modes such as positive/reverse wiring, internal/external standard capacitance, internal/external high voltage, reverse wiring low-voltage shielding, CVT and transformation ratio. Can automatically distinguish capacitance, inductance, resistance type samples. Integrated structure, automatic and intelligent measurement, easy to use and carry.
2. It has normal measurement and precise measurement modes. The test speed of the precise measurement mode is slightly slower than that of the normal measurement mode. It is suitable for occasions where the field interference is particularly large, and the normal measurement mode is generally used on site.
3. Frequency conversion anti-interference, accurate measurement under 200% interference, stable test data, suitable for anti-interference dielectric loss test on site.
4. Using digital waveform analysis and bridge self-calibration technology, the accuracy and stability of the positive/reverse wiring are consistent, and the high-precision three-terminal standard capacitor is used to achieve high-precision dielectric loss measurement.
5. Built-in series and parallel dielectric loss measurement models, and can simulate the work of Xilin bridge and current comparator, which is convenient for instrument verification.
6. During CVT self-excitation measurement, the measuring line can be grounded, and C1/C2 can be measured at the same time during one connection. It can automatically compensate for the influence of busbar grounding and the partial voltage of standard capacitors without changing the line or connecting any accessories.
7. With reverse wiring low-voltage shielding function, when the 220kVCVT bus is grounded, 10kV reverse wiring dielectric loss measurement can be performed on C11 without disconnecting the wiring, and the capacitance and dielectric loss value of the lower shielding part can be measured at the same time.
8. With CVT ratio measurement function, it can measure CVT ratio, polarity and phase error.
9. Security measures
High-voltage protection: short-circuit, breakdown or high-voltage current fluctuations of the test product can cut off the output at high speed in a short-circuit mode.
Power supply protection: wrong connection of 380V, power supply fluctuation or sudden power failure, start protection, will not cause overvoltage.
Grounding protection: It has a grounding detection function, and the voltage cannot be boosted when it is not grounded. If the instrument is not grounded during the measurement, the grounding protection will be activated.
CVT protection: Four protection limits for high-voltage side voltage and current, low-voltage side voltage and current, will not damage the equipment; wrong menu selection will not output excitation voltage. There is no 10kV high voltage output during CVT measurement.
Misoperation prevention: two-level power switch; real-time monitoring of voltage and current; multiple keystrokes to confirm; terminal high/low voltage is distinct; slow boosting, rapid decompression, sound and light alarm.
Anti-"capacity rise": When measuring large-capacity samples, there will be a "capacity rise" effect of increased voltage. The instrument can automatically track the output voltage and keep the test voltage constant.
High-voltage cable: high-voltage resistant insulated wire, which can be used for mopping the ground
Technical index:
Dielectric loss (tgδ) measurement range: unlimited, with a resolution of 0.001%, automatic identification of three samples of capacitance, inductance and resistance.
Test current range: 10μA～5A
Capacitance (Cx) measuring range: internal connection method: 3pF～60000pF/10kV 60pF～1μF/0.5kV
External high voltage: 3pF～1.5μF/10kV 60pF～30μF/0.5kV
Internal booster output: 0.5～10kV Maximum output current: 200mA
Lifting and pressing method: continuous and smooth adjustment
Voltage accuracy: ±(1.0%×reading+10V)
Voltage resolution: 0.1V
Measurement accuracy: Cx: ±(reading×1%+1pF)
tgδ: ±(reading×1%+0.00040)
Anti-interference ability: frequency conversion anti-interference, the above accuracy can still be achieved under 200% interference
Resolution: up to 0.001pF, 4 significant digits
Test frequency: 45, 50, 55, 60, 65Hz single frequency
45/55Hz, 55/65Hz, 47.5/52.5Hz automatic double frequency conversion
Frequency accuracy: ±0.01Hz
High voltage applied externally: Maximum test current 5A for positive and negative wiring
CVT self-excitation method measurement: output voltage 3～50V, output current 3～30A
Simultaneous measurement of C1/C2, high voltage connection can be dragged to the ground
CVT transformation ratio measurement: transformation ratio measurement accuracy: ± reading×1% transformation ratio measurement range: 10～99999
Phase measurement accuracy: ±0.02° Phase measurement range: 0～359.99°
High voltage dielectric loss: support high voltage dielectric loss of frequency conversion and resonance power supply
Working power supply: 180V～270VAC, 50Hz/60Hz±1%, power supply from mains or generator
Ambient temperature: -10℃～50℃
Environmental humidity: <85%
No. 255, Shanpu Road, Hedong Industrial Park, Wuzhong Economic Development Zone, Suzhou City, Jiangsu Province
Tel：+86-512-67266386
Fax：+86-512-67167303
szhd@szhddq.com
WeChat public account
