What aspects should be paid attention to when measuring insulation equipment with a shake meter

1. First, check that the shake table is normal (that is, the short circuit shake is zero, and the separate shake is infinity), and the shake speed is 120 revolutions per minute;

2. Pay attention to safety and keep a distance from the live parts;

3. It is best to have two people when shaking the test, and the test clip leaves the equipment first, and then stops shaking.

4. Pay attention to the discharge after the telemetry!

You can buy an electric megohmmeter that doesn't need to be shaken and is easier to operate.

The main thing is to check the correct wiring, for example, when measuring the high-voltage insulation of the transformer, the high-voltage tail must be disconnected from the ground, otherwise the high-voltage coil will be burned.

Also known as a megohmmeter, a shake meter is used to test the insulation of wiring or electrical equipment. The usage methods and precautions are as follows:

First of all, choose a shake meter that is suitable for the voltage level of the tested element, and for lines or electrical equipment of 500V and below, a 500V or 1000V shake meter should be used. For lines or electrical equipment above 500V, a 1000V or 2500V shake meter should be used.

When testing the insulation of high-voltage equipment with a shake meter, it should be carried out by two people.

Before the measurement, the power supply of the line or electrical equipment to be tested must be completely disconnected, that is, it is not allowed to measure the insulation resistance with electricity. And it is necessary to find out that the line or electrical equipment is unmanned before it can be carried out.

The meter wire used for the shake must be an insulated wire, and it is not suitable to use a double-strand stranded insulated wire, and the end of the meter wire should have an insulating sheath; The line terminal "L" of the shake meter should be connected to the measured phase of the equipment, the ground terminal "E" should be connected to the non-measured phase of the equipment shell and the equipment, and the shield terminal "G" should be connected to the protective ring or the cable insulation sheath to reduce the error caused by the leakage current on the insulating surface to the measurement.

Before measuring, an open-circuit check should be carried out on the shake meter. When the "L" end and the "E" end of the shake table are not loaded, the pointer of the shake table should point to the "" When the L" end of the shake table is shorted with the "E" end, the pointer of the shake table should point to "0". Indicates that the shake table functions well and can be used.

The test line or electrical equipment must be grounded and discharged before the test. When testing the line, you must obtain the permission of the other party before proceeding.

When measuring, the speed of shaking the handle of the watch should be uniform for 120r min; After maintaining a stable speed for 1 min, take a reading to avoid the influence of the absorbed current.

Both hands must not touch both wires at the same time during the test.

After the test, the stitches should be removed first, and then the shaking table should be stopped. In order to prevent the electrical equipment from recharging the shake meter and causing damage to the shake meter.

In the event of lightning, it is strictly forbidden to test the insulation of the line.

The method is as follows: 1. Before use, the side of the shake table should be placed away from the magnetic field, and placed on the horizontal plane, not too tilted.

2. Fix the measuring wire of the shake meter to the two binding posts of the shake meter, and the two measuring wires are not divided into positive and negative, and then tighten the screws.

3. Clamp one measuring wire to the motor winding, and the other measuring wire to clamp the shell of the motor.

4. At this time, start to rotate the shake handle, about 120 revolutions per minute, and the reading core touches the rubber after the shake is stable.

5. Each pair of windings of the motor needs to be measured according to this method, if there is a group that does not meet the standard, the motor can not be used.

Precautions for use:

1. It cannot be used with electricity, and the electricity should be checked before measurement, and the insulation should be measured where the electricity is tested.

2. At the end of the measurement, the large capacitance equipment should be discharged.

3. Not all equipment can be measured when the equipment is powered off, such as frequency converters.

4. The table lines should not be twisted together, but should be separated.

5. During the shaking test, no one can work on the device under test.

6. It is forbidden to measure the insulation resistance during lightning or near high-voltage equipment, and can only be measured when the equipment is not charged and there is no induced electricity.

7. It is strictly forbidden to touch the watch by hand before it stops rotating or before the equipment under test is discharged. When removing the sutures, do not touch the metal part of the lead wire.

Summary. The insulation resistance of the telemetry low-voltage power cable should be 1000V megohmmeter, and the insulation resistance of the telemetry low-voltage power wire should be 500V megohmmeter.

When the telemetry insulation resistance of low-voltage power cable, how many volt rocker meters should be used?

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The insulation resistance of the telemetry low-voltage power cable should be 1000V megohmmeter, and the insulation resistance of the telemetry low-voltage power wire should be 500V megohmmeter.

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Precautions when using the shake meter.

1. The insulation of high-voltage equipment should be measured by two people.

2. The appropriate insulation resistance tester should be selected according to the different voltage levels of the equipment under test.

3. The wire used for measurement should use an insulated wire, and its end should have an insulating sleeve.

4. The single-strand wire should be connected separately between the shake meter and the equipment under test, and the surface of the line should be kept clean and dry to avoid errors caused by poor insulation between the lines.

5. When measuring insulation, the equipment under test must be disconnected from all aspects, and it must be verified that there is no voltage, and it can only be carried out after proving that the equipment is unmanned. Do not allow others to approach the device during the measurement.

6. Before and after measuring the insulation, the tested equipment must be discharged to the ground. The device under test must be disconnected from other power sources to protect the device and personal safety.

7. When the measurement line is not insulated, it should be carried out only after obtaining the permission of the other party.

8. When measuring insulation on a line with induced voltage (a double-circuit line erected on the same pole or a single-circuit with a parallel section to another line), the other circuit must be powered off at the same time before it can be carried out.

9. When measuring the insulation resistance near the live equipment, the surveyor and the position of the shake meter must be selected appropriately and keep a safe distance to avoid the shake meter lead or lead support from touching the live part. When moving the lead, attention must be paid to monitoring to prevent the staff from being electrocuted.

10. When shaking the test, the shake table is placed in a horizontal position, and the end button of the hail detection belt is not short-circuited between the end buttons when the shaker is rotated. When shaking the capacitor and cable, the wiring can only be disassembled when the crank is rotated, otherwise the reverse charging will damage the shake meter.

11. When shaking the handle, it should be accelerated from slow to fast, evenly accelerated to 120r min, and pay attention to prevent electric shock. During the shaking process, when the pointer has reached zero, it can no longer be shaken to prevent the coil in the watch from heating and damage.

12. In order to prevent the leakage of resistance on the surface of the equipment under test, the middle layer of the equipment under test (such as the inner layer insulation between the core of the cable shell) should be connected to the protective ring when using the shake meter.

13. It is forbidden to use the shake meter to measure in thunder and lightning weather or near equipment with high-voltage conductors.

The insulating shake meter is an instrument used to measure the dielectric strength of electrical equipment, and is an indispensable and important equipment in electrical safety testing.

When using an insulated shake meter, first of all, the installation of the equipment should be carried out, the shake meter should be installed on the electrical equipment, and then the measuring power supply should be connected to the vertical sun or to the shake meter, and the two ends of the connecting cable should be connected to the positive and negative poles of the power supply respectively, and then the adjustable insulation resistance of the shake meter should be placed between the measurement power supply and the electrical equipment.

Next, turn on the power switch of the insulated shake meter, adjust the starting current on the shake meter, adjust the current value to the required value, then adjust the voltage value of the measured power supply Kaison to the nominal voltage value, turn on the output switch of the measuring power supply, and the reading on the shake meter shows the insulation strength of the remaining equipment of the device.

The insulated shake meter is a test instrument used to test the high edge of the cavity of electrical equipment. The following is the use of the insulated shake table and precautions:

How to use:1The power to be tested is turned off and the grid is disconnected.

2.Connect the wiring between the insulating rocker and the round branch of the equipment under test with the cable.

3.Switch the insulated shaker to the appropriate test mode and adjust the test voltage.

4.Start the test and observe the change in the insulation resistance value.

Notes:1The equipment under test must be grounded before testing to prevent dangerous electrical breakdowns.

2.Electrical safety standards and operating procedures should be strictly adhered to during the test to prevent electric shock and other dangerous events.

3.During the test, attention should be paid to the working status of the insulated shake meter, and the test voltage and test mode of the branch sensitive should be adjusted in time to ensure that the test results are accurate and reliable.

4.After the test, the test circuit should be disconnected in time, and the tested equipment should be restored to normal working state.

When measuring the insulation resistance of electrical equipment, an insulation tester should be used. This is an instrument specifically used to measure the insulation resistance of electrical equipment, and is often referred to as an insulation resistance tester or multimeter. It can accurately measure the insulation resistance value in the electrical equipment of ZEN Beido, and the measurement results can be visually reflected through the display or pointer.

The insulation tester can be used to detect and evaluate the insulation condition of electrical equipment in time, and find hidden dangers and defects, so as to avoid safety accidents caused by insulation failure. At the same time, the following points need to be paid attention to when using the insulation tester for measurement:

The tester should be calibrated before measurement to ensure the accuracy of the measurement results.

When measuring, turn off the power of electrical equipment and isolate the part to be measured from other power sources and equipment to avoid measurement errors.

When taking measurements on high-voltage electrical equipment, insulated gloves and shoes should be worn and operated in strict accordance with the relevant operating procedures and safety standards.

In short, the selection of appropriate insulation tester and operation in accordance with the correct operating procedures and safety standards can effectively ensure the insulation safety of electrical equipment and ensure that the quasi-slag of the measurement results is reliable.

1. The shake table needs to be operated by a two-chain Qi Xian person wearing insulated gloves;

2. Select the appropriate range: for lines or electrical equipment of 500 volts and below, a 500 volt or 1000 volt shake meter should be used, and a 1000 volt or 2500 volt shake meter should be used for lines or shed imitation electrical equipment above 500 volts;

3. Wiring: G is the shielded wire, L is the measured phase, E is grounding;

4. Calibrating the table: shaking the table to open the circuit, and the short circuit is zero;

5. Disconnect the connected power supply and check the power;

6. When measuring, the speed of shaking the handle of the watch is 120 revolutions per minute; Hold a steady speed for 1 minute to read to avoid the effects of the absorbed current;

7. After the test, remove the thread first, and then stop shaking the shake meter to prevent the capacitive electrical equipment from recharging the shake meter and causing damage to the shake meter;

8. Discharge: Remove the ground wire used in the measurement from the shake meter and short circuit the equipment under test.

How to measure the insulation resistance of electrical equipment and what should be paid attention to in the measurement?

How to measure the insulation resistance of electrical equipment and what should be paid attention to in the measurement? 1. The power supply must be cut off first. For equipment with large capacitance (capacitors, transformers, motors, cable lines, etc.), it must be discharged first.

2. The megohmmeter should be placed in a horizontal position, before the wiring, shake the megohmmeter to see if the pointer is at the "" place, and then short circuit the two binding posts of "L" and "E", and slowly shake the megohmmeter to see if the pointer is at the "0" place. For semiconductor megohmmeters, it is not advisable to use short circuit calibration. 3. The lead wire of the megohmmeter cable fault tester should be made of multi-strand flexible wire, and it should have good insulation.

4. It is forbidden to measure the double-return overhead lines and bus bars that cannot be completely cut off, when the induced voltage of the tested circuit exceeds 12V, or when the overhead lines and overhead lines connected to the overhead lines are generated during thunderstorms. 5. When measuring the insulation resistance of capacitors, cables, large-capacity transformers and electrical mechanisms, the object on the side should have a certain charging time, the larger the capacitance, the longer the charging time should be, generally based on the reading measured after the megohmmeter rotates for one minute. 6. When measuring insulation, the megohmmeter should be kept at the rated speed, which is generally 120r min.

When the capacitance of the device under test is large, in order to avoid the pointer swinging, the speed can be increased to 130r. The surface of the device under test should be wiped clean without dirt, so as not to miss the accuracy of the measurement.