Parameters of intelligent dielectric loss tester

Parameters of intelligent dielectric loss tester

Product Introduction:

The dielectric loss tester is used for on-site anti-interference dielectric loss measurement or laboratory precision dielectric loss measurement. The instrument is an integrated structure with built-in dielectric bridge, variable frequency power supply, test transformer, and standard capacitor. Adopting frequency conversion anti-interference and Fourier transform digital filtering technology, the measurement is fully automated and intelligent, and the measurement data is very stable under strong interference. The measurement results are displayed on a large LCD screen and come with a built-in micro printer for printing and output.

Working Principle:

The instrument measurement circuit includes a standard circuit and a test circuit, as shown in Figure 3.

The standard circuit consists of a built-in high-voltage stability standard capacitor and a standard resistor network. The computer collects the current amplitude and phase difference of the standard circuit and the test circuit in real time, and calculates the capacitance value (CX) and dielectric loss (tg δ) of the tested product.

All data acquisition circuits use high-voltage stabilizing devices, and the acquisition board and acquisition computer are shielded by an iron box floating in the air, while the instrument casing is grounded and shielded; In addition, anti-interference technologies such as optical data, floating ground, large-area ground, single point ground, and digital filtering were used. In addition, the computer processed data from hundreds of power grid cycles, making the measurement results stable, accurate, and reliable.

Technical Indicators:

1. Measurement of dielectric loss and capacitance

Accuracy: Cx: ± (reading x 1%+1pF)

tgδ: ± (reading x 1%+0.00040)

Anti interference indicators: Variable frequency anti-interferenceCan still achieve the above accuracy under 200% interference

Range of capacitance: Apply high pressure internally: 3pF~60000pF/10kV 60pF~1.2μF/0.5kV

External high voltage: 3pF~1.5 μ F/10kV 60pF~30 μ F/0.5kV

resolution： 0.001pF，4 significant digits

Range of TG δ： Unlimited, resolution0.001%, automatic identification of three types of test samples: capacitor, inductor, and resistor.

Test current range: 10 μ A~5A

Apply high pressure internally: Set voltage range: 0.5~10kV

Output current: 200mA

Boosting and lowering method: Continuous smooth adjustment

Voltage accuracy: ± (1.5% x reading+10V)

Voltage resolution: 1V

Test frequency: 45~65HzInteger frequency

49/51Hz、45/55HzAutomatic dual frequency conversion

Frequency accuracy: ±0.01Hz

External high pressure: Test current 5A during positive wiring/40~70Hz

Test current 10kV during reverse wiring / 5A /40~70Hz

CVT self-excited low-voltage output: output voltage 3~50V, output current 3~30A

Measurement time: about30s，Related to the measurement method

2. Other indicators

Input power supply: 180V~270VAC，50Hz/60Hz±1%Powered by mains electricity or generators

Computer interface:Standard RS232 interface

printer:bring your ownMicro thermal printer

Ambient temperature -10℃~50℃

Relative humidity: <90%，No condensation

Parameters of intelligent dielectric loss tester