Heterodyne Dielectric Loss Tester
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Safety Measures:
1. Before using this instrument, be sure to read this manual carefully.
2. Operators should have general knowledge of electrical equipment or instruments.
3. The instrument should avoid severe vibration.
4. The instrument must be reliably grounded to prevent electric shock hazards.
5. After the test, press the reset button, turn off the power switch, and strictly prohibit disassembling test cables or replacing oil samples while powered on.
Operating conditions: -15℃～40℃; RH＜80%
Power supply: AC 220V±10%, frequency unlimited
AC high voltage output: 400V～2200V ±2%, every 100V, 50VA
DC high voltage output: 200V～600V ±2%, every 50V
Temperature-controlled induction furnace: max power 500W
Temperature control range: <100℃
Temperature control error: ±0.5℃
Temperature measurement resolution: 0.1℃
Temperature control time: from room temperature to 90℃, less than 20min
Internal booster output capability
Output voltage Rated output current
5kv 7.5kv 10kv 100mA
1.5kv 2.25kv 3kv 300mA
0.5kv 0.75kv 1kv 500mA
Technical Specifications
1. Test ambient temperature: 10℃～30℃ (LCD screen should avoid prolonged sunlight)
2. Relative humidity: 20%～80%
3. Power supply: voltage: 220V±10%, frequency 50±1Hz
4. Dimensions: length*width*height=470mm*320mm*360mm
5. Weight: 18kg
6. Output power: 1.5KVA
7. Display resolution: 3 digits, 4 digits (internally all 6 digits)
8. Test methods: direct connection method, reverse connection method, external test voltage method
9. Measurement range: internal test voltage
Working Principle
The instrument's 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 stable 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 (tgδ) of the tested object.
The data acquisition circuit uses high-voltage stable devices entirely. The acquisition board and acquisition computer are completely floating and shielded by an iron box, and the instrument shell is grounded and shielded. In addition, anti-interference technologies such as optical data transmission, floating ground, large-area ground, single-point ground, and digital filtering are used. Combined with the computer processing data from hundreds of power grid cycles, the measurement results are stable, accurate, and reliable.
Note: The above information and technical parameters are compiled and released by Yangzhou Dary Electric Co., Ltd.
