Resin ceramic power frequency voltage breakdown tester

Resin ceramic power frequency voltage breakdown testerOvercurrent protection device: Cut off the power supply within 0.01 seconds when the sample breaks down

Operating environment: The instrument can operate stably at a temperature of 15-30 ℃ and a relative humidity of 0-85%.

Experimental environment: Temperature between 15 ° C and 25 ° C, relative humidity between 60% and 70%.

Power supply: The instrument can operate stably at a single-phase AC voltage of 220V ± 10% and a frequency of 50Hz ± 1%. The configuration includes various power lines, grounding wires, and signal cables required for the normal operation of the instrument

Software Description:

During the testing process of this device, the test curve can be dynamically drawn, and the test curve can be overlaid with multiple colors for comparison

2. The experimental data can be edited and modified, making it flexible and applicable

3. Experimental conditions and test results can be stored as data

4. The validity of curve data in a set of experiments can be manually selected

5. The experimental result data can be imported into EXECL

6. The software operation interface allows operators to operate freely and has a more user-friendly interface.

Setting instructions

Testing unit: The name of the unit that conducts testing and inspection on the material.

Test method: Choose between "AC test" or "DC test", and remove the short-circuit rod when conducting the DC test.

Test method: "breakdown", "withstand voltage", and "gradient withstand voltage" tests can be conducted.

Test personnel: Enter the name of the testing personnel.

Test temperature: Enter the test temperature.

Test humidity: Input the test humidity.

Electrode shape: Input electrode shape.

Electrode size: Input electrode size.

Peak voltage drop: used to determine whether a material has broken down, and a momentary drop in voltage exceeding this value is considered breakdown.

Stop current judgment: used to determine the low current during breakdown, exceeding this current is considered breakdown.

Initial voltage: used for withstand voltage and gradient withstand voltage tests, where the voltage is raised at the beginning of the test.

Resin ceramic power frequency voltage breakdown testerSafety instructions for the use of high-voltage equipment:

The voltage test above 100kV is conducted in a high-voltage shielding room, and the operator operates outside the shielding room When the experimental operation door is opened, the high-voltage power input of the equipment is cut off There is no output voltage on the high voltage side. The distance between the high-voltage electrode of the 150KV testing equipment and the shielding chamber wall is greater than 650mm, so there is no danger even if people touch the box wall during the test.

The equipment should be equipped with a separate protective grounding wire. Grounding protection is mainly used to reduce the strong electromagnetic interference caused by the breakdown of the sample to the surrounding area. It can also prevent the computer from losing control.

The circuit of the test equipment is equipped with multiple protection measures, mainly including overcurrent protection, voltage loss protection, leakage protection, short circuit protection, DC test discharge alarm, etc.

Level 6 high-voltage safety power-off control:

① Main power switch

② High voltage power-off switch (key switch)

③ Voltage regulator reset switch

④ Test box door safety switch

⑤ High voltage transformer input side current limiting circuit breaker

⑥ Leakage protection switch

In ASTM standards, these electrodes are the most commonly used or referenced. It is not recommended to use electrodes for materials other than flat materials, except for Type 5 electrodes. Other electrodes used by ASTM or electrodes recognized by both the buyer and seller but not listed in this table are also suitable for evaluating the measured materials.

B electrodes are usually made of brass or stainless steel. Reference should be made to the standards for controlling the tested material to determine its suitability.

The surface of the C electrode should be polished and any debris left from the previous test should be removed.

Refer to appropriate standards to determine the load force of the installed upper electrode. Unless otherwise specified, the upper electrode should weigh 50 ± 2g.

Refer to appropriate standards to determine gradients with appropriate spacing.

FIEC publication 243-1 provides type 6 electrodes for determining flat plate materials. For the concentricity of electrodes, they are not as important as Type 1 and Type 2 electrodes.

As long as the inner diameter of the circular edge of the test sample is greater than 15mm, other diameters can also be used.

The H7 electrode, as described in Note G, is given in IEC Publication 243-1 and should be measured parallel to the surface

ASTM D149-2009 Test Method for Dielectric Breakdown Voltage

6.1.3 According to 12.2, the control of the variable low-voltage source can change the pressure of the power supply, so that the synthesized test voltage is smooth, uniform, without excess or transient. Under no circumstances should the peak voltage exceed 1.48 times the effective value of the displayed voltage. Motor driven controllers are more suitable for fast testing (see 12.2.1) or slow testing (see 12.2.3).

6.1.4 Install a disconnect device on the power supply that can operate within three cycles. This device disconnects the voltage source equipment from the power supply equipment to protect the voltage source from the impact of sample breakdown causing equipment overload. If a continuous current is maintained after rupture, it will cause unnecessary combustion of the test sample, pitting corrosion of the electrode, and contamination of the liquid environmental medium.

6.1.5 The circuit breaker equipment should have detection elements located on the secondary boosting transformer that can adjust the current, so as to adjust and arrange according to the properties of the test sample to detect the test current. Set up detection components to cope with the breakdown current of the test sample defined in 12.3.

6.1.6 The current setting has a significant impact on the test results. The setting should be high enough to prevent transient voltage, such as partial discharge, from passing through the circuit breaker. If it is not high enough, it will break through the excessively burned test sample and cause damage to the electrodes. The optimized current setting may not be applicable to all test samples, depending on the specific usage of the material and the purpose of the test. It is necessary to test the given test samples with multiple current settings. The electrode region has a significant impact on the selection of current settings.

6.1.7 The current sensing element of the test sample should be located at the front end of the step-up transformer. Calibrate the current detection scale according to the test sample current.