Wuhan GDMK Electric Co., Ltd.

OVERVIEW:

Many power systems, railway systems, large-scale petrochemical plants and enterprises have a lot of electrical equipment whose internal insulation are mostly oil-filled insulation type, and therefore, test on insulating oil dielectric strength is common and necessary. To meet the needs of the market, we have developed and produced a series of insulating oil dielectric strength testers according to national standard GB/T507-2002, industry standard DL429.9-91 and the latest Electric Power Industry Standard DL/T846.7-2004 by ourselves. This instrument, by using a single-chip microcomputer as the core, can operate in full automation with high accuracy, greatly improving work efficiency and reducing the labor intensity of workers. Moreover, it is small in size and convenient to carry.

MAJOR TECHNICAL INDICATORS:

1. Output voltage: 0~100KV (optional)

2. Voltage distortion rate: <3%

3. Voltage raising speed: 0.5~5 KV/S (adjustable)

4. Standing time: 15min (adjustable)

5. Boosting interval: 5 min (adjustable)

6.Boosting frequency: 1~9 time(s) (optional)

7. Booster capacity: 1.5KVA

8.Measuring accuracy: ±3%

9. Supply voltage: AC220V±10%

                             50Hz±1 Hz

10. Power: 200W

11.Applicable temperature: 0?~45?

12.Applicable humidity: <75%RH

13. Overall dimension: 465×385×425

Functional characteristics:

1. With a microprocessor, automatically fulfill the withstand voltage test for oil circulation with a range of 0~80KV (including boosting, maintaining, mixing, standing, calculation, printing and other operations).

2. Display by large-screen LCD and prompt by Chinese menu.

3. Simple operation. The machine will automatically complete the withstand voltage test on one cup of sample oil after simple setting by the operator. Breakdown voltage value of 1 to 6 times and recurrent times will be automatically saved. After the test, the thermal printer will print each breakdown voltage value and average value.

4. Power-down preservation. It can save 100 tested results and displaying current ambient temperature and humidity.

5. Adopt a single-chip microcomputer to boost the voltage at an even speed. The voltage is accurate at 50HZ, ensuring the whole process easy for control.

6. Equipped with over-voltage, over-current and limit protections to ensure the safety of operators.

7. With the function of displaying the measured temperature and system clock.

8. Communicate with computer with a standard RS232 interface.

Common Fault Clearances:

? Power light off, screen display off

? Check the plugging of power plug.

? Check the condition of the protector tube inside the power plug.

? Check the socket electricity.

? No punch through oil cup

? Check inserting of connectors on circuit board.

? Check contacting of cap high-voltage switch.

? Check attracting of high-voltage contacts.

? Check break of high-voltage line.

? Light display contrast

? Adjust the potentiometer on the circuit board.

? Printer failure

? Check plugging of printer power line.

? Check plugging of printer data line.