Insulation material arc resistance tester

Insulation material arc resistance testerSelf editing interface

Ta - Flame application time

Intermittent time - the time it takes for the flame to return to the next automatic forward movement

Cycle times - i.e. number of flame applications

Experimental process description:

Process arc current/mA on-off time/second duration/second test duration/second

1/8-10 10 1/4s on/7 4s off 60 60

1/4-10 10 1/4s on/7/4s off 60 120

1/2-10 10 1/4s on/7/4s off 60 180

10 10 conductivity 60 240

20 20 conductive 60 300

30 30 conductive 60 360

40 40 conductive 60 420

Main technical requirements:

1. Input voltage: AC 220V

2. Output voltage: AC 0-20 KV;

3. Electrical capacity: 1.5 KVA

4. Test method: intermittent arc, continuous arc

5. Test current: 10MA-20MA-30MA-40MA optional

6. Test voltage control error: ≤ 2%

7. Arc on-off time error:<5ms

8. Test voltage continuously adjustable: 0-20 KV

9. Electrode specification: Stainless steel plate-shaped electrode 25.4mm * 12.7mm * 0.15mm

Tungsten steel electrode ￠ 2.4mm * 70mm

Electrode configuration angle 110 degrees

Electrode weight: 50G

10. Safety protection measures: (1) Overpressure protection

(2) Overcurrent protection

(3) Short circuit protection

(4) Security door opening protection

(5) Software misoperation protection

5. Parameter setting interface

(1) Clear Historical Data - Clicking Clear will clear all saved historical data

(2) The motor returns to turn off the gas - there are two options for "Yes" and "No" in the switching state

Select 'Yes', the system will turn off the gas at the same time as the motor returns, and you need to operate it before starting next time

On the interface, turn on the gas and ignite it. If you select 'No', the local light will remain on

(3) Motor start automatic ignition - there are two options for "Yes" and "No" in the switching state. Only when the motor returns to turn off the gas and selects "Yes", can "Yes" be selected to select the automatic point

If the ignition is on, the system will automatically turn on the gas ignition three times after pressing the start button, and then automatically start the burner.

operating steps

1. Horizontal method (set the flame application time to 30 seconds before starting the 30 second experiment)

(1) Draw two lines perpendicular to the long axis at 25mm and 100mm on one end of the pattern, at 25mm

Mark the other end so that the pattern is parallel to the vertical axis and clamped at a 45 degree angle to the horizontal axis.

(2) Turn on the power and press' stop 'to retract the main light to the far left.

(3) Press "Adjust" to move the BenSheng lamp to one end of the style, and loosen the BenSheng lamp bracket and style support

Lock the screw on the slider and adjust the distance between the BenSheng lamp and the style, so that the BenSheng lamp mouth is below the free end of the style. Use the "up" and "down" buttons to adjust the height of the style, so that the free end of the style is 10mm above the BenSheng lamp mouth. After the adjustment is completed, press the "stop" button to return the main light to its original position.

(4) Open the gas main valve on the gas path to allow gas to enter the equipment, press "Gas" and then

Adjust the "gas flow" and press "ignition" to light the Bunsen burner (due to the presence of air in the air duct during the first use, it is necessary to exhaust the air completely before ignition), and adjust the rolling nut at the bottom of the Bunsen burner to produce a 20mm high blue flame when the lamp tube is in a vertical position. Tilt the burner at a 45 degree angle.

(6) Press' Start 'to apply flame to the sample. The flame application time is over, and the main lamp will automatically retract. After stopping the flame application, if the sample continues to burn (including flame combustion or flameless combustion), when the flame is applied

When starting the timer, observe the burning situation of the pattern. When the flame burns to the 25mm mark, press the timer button to start counting the burning time. When the pattern continues to burn to the 100mm mark or goes out, press the timer button again. If the pattern does not burn to the 100mm mark, measure the burning length L from the 25mm mark to the end of burning (in millimeters).

When the self-supporting style burns, the non self-supporting style clip should be moved to the right; When the non self-supporting style burns, observe the burning situation of the style and gradually retract the style clip to the right.

Note: If the burning front crosses the 100m mark, record the time t required for burning from the 25mm mark to the 100mm mark. At this time, the burning length is 75mm; If the combustion front is not burned

At 100mm, the distance from the burnt length of 25mm to the extinguishing point. Grading symbol. The combustion performance of materials can be divided into the following four levels based on their combustion behavior after ignition (symbol FH represents horizontal combustion): FH -1: After removing the ignition source, the flame extinguishes immediately or the burning front does not reach the 25mm mark; FH-2: After moving the ignition source, the combustion front crosses the 25mm mark but does not reach the 100mm mark. In FH-2 grade, the burning length should be written in the classification mark, such as FH-2-70mm, FH-3: after removing the ignition source, the burning front should cross the 100mm mark. For samples with a thickness of 3 to 13mm, the burning rate should not exceed 40 mm/min; For specimens with a thickness less than 3 mm, the combustion rate shall not exceed 75 mm/min. In FH-3 level, the linear combustion rate should be written into the classification mark, such as FH-3-30 mm/min, FH-4: except for the linear combustion rate being greater than the specified value, everything else is the same as FH-3 level. The combustion rate should also be included in the classification mark, such as the FH vertical method

(1) Press the "Adjust Position" button to move the BenSheng lamp to one end of the style, adjust the distance between the BenSheng lamp and the style, so that the BenSheng lamp mouth is below the free end of the style. Use the "Up" and "Down" buttons to adjust the height of the style, so that the free end of the style is 10mm above the BenSheng lamp mouth. After the adjustment is completed, press the "stop" button to return the main light to its original position.

(2) Open the gas main valve on the gas path to allow gas to enter the equipment, press "Gas" and then

Adjust the "gas flow" and press "ignition" to light the Bunsen burner (due to the presence of air in the air duct during the first use, it is necessary to exhaust the air completely before ignition), and adjust the rolling nut at the bottom of the Bunsen burner to produce a 20mm high blue flame when the lamp tube is in a vertical position. Tilt the burner at a 45 degree angle.

(3) Press' Start 'to move the BenSheng lamp to the bottom of the pattern, apply flame to the pattern, and when the flame application time ends (10S), the BenSheng lamp will automatically retract, and' T1 'will start timing,

(4) When the flame on the pattern goes out, press "timer" T1 to stop the timer, restart the Bunsei lamp, apply the flame again for 10 seconds, and start timing T2 when the Bunsei lamp retracts again

(5) When the pattern goes out again, press the "timer" button to stop timing T2 and start timing T3

(6) When the flameless combustion ends, press the "timer" button to stop timing T3

(7) Observe the burning situation of the sample, whether there are any droplets igniting the bottom layer, and whether the flame has spread to the sample holder

(8) Repeat each step of this section until a set of styles is completed.

(9) Assessment of results:

According to the table below, the combustion performance of the material is classified into three levels: 94V-0, 94V-1, and 94V-2

Note: △ indicates that the material cannot be classified by vertical method, and its combustion performance should be evaluated by horizontal method

classification.

3. Self editing

After completing several repeated flame applications, T1 starts timing. When the flame combustion stops, press the "timing" button to stop timing T1 and start timing T2. When the flameless combustion ends, press the "timing" button again to stop timing T2.

Other operations are the same as horizontal and vertical tests

Use of 50W flame calibration device: Hang the sensor as shown in the diagram, apply flame to the copper head when the temperature is below 50 degrees. When the temperature rises to 100 degrees, the time relay will automatically start timing. When the temperature rises to 700 degrees, the time relay will automatically stop timing. If the time displayed on the time relay is 44S ± 2S, the flame can be used for testing. If it is not within this time range, adjust the size and intensity of the flame, and recalibrate until the time is within 44S ± 2S.

Insulation material arc resistance testerDear user:

Please be aware that the following items may be involved while using the instrument:

1、 Please read the relevant standards and equipment manual before using the device!

2、 The instrument should have a grounding wire when using the specified voltage.

3、 When testing samples, certain materials may release toxic and harmful gases. It is recommended that the testing be conducted in a fume hood and proper human protection measures should be taken.

4、 It is strictly prohibited to connect any other gas that does not match the device!!! When using gas sources such as liquefied gas, natural gas, and coal gas, there should be no air leakage at each pipeline interface, and the ventilation pipe should be replaced in a timely manner if it is aging.

5、 Flammable and explosive materials other than those required for testing are strictly prohibited in the laboratory!

6、 During the experiment, operators are not allowed to leave the testing site.

7、 During the experiment, experimenters should be careful to prevent burns caused by high temperatures!

8、 Computer controlled devices should be protected against virus invasion.

9、 The laboratory needs to be equipped with fire-fighting equipment.

10、 At the end of the experiment, all power and gas sources should be turned off.

11、 After the experiment is completed, please be sure to clean up any residual or dripping materials from the experiment! To prevent accidents caused by the accumulation of residues or drips!