What is high voltage electrical test equipment and what are the high voltage test items?

The equipment used for the test of high-voltage electrical equipment includes: mass loss measuring instrument, capacitance and inductance detector, transformer comprehensive tester, DC high-voltage generator, megohmmeter, arrester resistive current tester, switch mechanical characteristics tester, AC-DC dual-purpose voltage divider, underground lead conduction tester, relay protection test device, loop resistance meter, clamp phase meter, DC resistance tester, insulation resistance tester, test transformer, ground network comprehensive tester, meter calibrator, triple frequency voltage generator, Current transformer error analyzer, high current generator, etc.

Product parameters 1, technical conditions.

1) Power supply: AC220V 10%, 50Hz 1%2) Output voltage indication accuracy: level 1.

3) Output current indication accuracy: 1 level.

4) Ripple Coefficient:

5) Output voltage indication accuracy: 1 stage, with latching.

2. Conditions of use.

1) Relative humidity: no more than 85% at 25, no condensation.

2) Working mode: 30 minutes of intermittent use.

3) Ambient temperature: - 10 40

4) Altitude: below 1500m.

Model: ZGF-60, 2ZGF-120, 2ZGF-200, 2ZGF-300, 3ZGF-300 5, output rated voltage (kv), 60120200300300 output rated current (mA), 22235, output rated power (W), 1202404009001500

The equipment for conducting experiments on high-voltage electrical appliances includes type experiments and factory experiments.

There are many varieties of DC booster instrument, power frequency voltage and high voltage generator, etc., and the test equipment is selected according to the test product.

There are many high-voltage test equipment products, including series resonance, power frequency withstand voltage, no partial discharge, straight high frequency, impulse voltage generator, insulation safety equipment and other equipment.

Sanxin Power is committed to the research and development and production of high-voltage test equipment, Sanxin Power has a wide range of products, the main products include: high-current temperature rise device, series resonance withstand voltage device, motor test bench, transformer test bench, impulse voltage generator, DC high voltage generator, relay protection tester, non-partial discharge test system, DC resistance tester, etc.

1. Transformer transformer, the specific test items are:

1. Measurement of transformer insulation resistance (before withstand voltage test) with 2500V shake meter.

Measurement. 2. For the measurement of DC resistance of transformer, the DC resistance rapid tester is used to measure the high-voltage side and low-voltage side of the transformer respectively.

3. The position of each tap changer of the transformer.

Variable ratio test. (Measurement error 5%-1%)

4. Transformer oil.

(This item is averaged 5 times.)

5. Transformer withstand voltage test (required to suppress the power frequency voltage of 30kv, 1 minute).

6. The transformer test cycle is once a year.

2: Power cable test, specific projects are:

1. Measurement of insulation resistance. It is performed before the DC withstand voltage test. Phase insulation, use 2500V shake meter shake for 1 minute.

2. The test of power frequency voltage, the test voltage is 28kV, every 10kV is recorded, it rises to 28kV, the pressurization time is 15min, no breakdown, and the leakage current is less than 50 UA.

3. The test cycle is once a year.

Three: electrical equipment test: specific items are: (high-voltage switchgear).

1. Insulation resistance measurement (including busbar, circuit breaker, transformer insulator.

Measurement of phases and ground. ）

2. Withstand voltage test. (Including busbar, transformer, circuit breaker, insulator, busbar, insulator 42kV, 1 minute, circuit breaker, transformer, 28kV, 1 minute).

3. Circuit breaker characteristics test and circuit breaker withstand voltage test. (Power frequency withstand voltage 28kV; 1 minute).

4. The test cycle is once a year.

Four: relay debugging: specific projects are:

1. Check whether the mechanical parts such as turntables, gears, and contacts are in good condition.

2. Carry out starting current, fixed value current, and tripping.

The setting of current and quick-break current should be recorded. (The relay action error is not more than 5%)

3. Carry out the circuit breaker tripping test at fixed value. (Splitting and closing, tripping).

4. The test cycle is once a year.

Five: grounding electrode grounding resistance.

Measurement: Measured with a special shake meter, the resistance value is below 4, and the test cycle is once a year. (The grounding resistance is not greater than 4 for power failure).

Six: Protective equipment test: specific items are:

High-voltage insulating gloves, insulating boots, brake rods, and high-voltage electroscope tests, with a cycle of once a year.

Seven: lightning arrester.

Breakdown voltage test, the test cycle of the original valve arrester is once every 1 year. Now it is changed to zinc oxide arrester, and the test period is once a year, (test items are 1 mA reference voltage test and 75% reference voltage leakage current measurement.) ）

There are many levels of high voltage, so let's give you an experimental project that needs to be done for 10kV electrical equipment.

10 thousand volt electrical equipment test project.

1. Circuit breaker.

1. Characteristic test (time, synchronous, action voltage, bounce time, stroke).

2. Loop resistance.

3. Vacuum degree (when vacuum circuit breaker, it is generally not replaced by fracture withstand pressure, because the test equipment is not mature).

4. AC withstand voltage.

5. Insulation test.

Equipment used: circuit breaker characteristic tester, loop resistance tester, vacuum tester, insulation resistance tester, AC and DC withstand voltage device.

2. Current transformer.

1. Converter ratio test (error).

2. Voltammetry characteristics.

3. Polarity. 4. Insulation test.

5. Angular difference ratio test (measurement).

6. AC withstand voltage.

Equipment: transformer comprehensive tester, insulation resistance tester, AC and DC withstand voltage device, angular difference ratio tester.

3. Voltage transformer.

1. DC resistance.

2. Insulation resistance.

3. Variable ratio test.

4. Withstand pressure. Equipment: Single-arm bridge, DC resistance tester, insulation resistance tester, ratio tester (voltage), AC and DC withstand voltage device.

Fourth, lightning arrester.

1. Leakage current.

Voltage in milliampere.

3. Insulation test.

Instruments used: DC high voltage generator, lightning arrester tester, insulation resistance tester.

5. Other equipment (porcelain bottles, wall casings, wirings, isolation switches).

1. Insulation resistance.

2. AC withstand voltage.

3. Nuclear phase instrument (line).

4. Loop resistance (isolation switch).

Instruments used: loop resistance, AC and DC withstand voltage device, insulation resistance tester.

1. Test transformers, including DC high-voltage generators and AC high-voltage generators, are used for withstand voltage tests, leakage current tests, etc.

2. Voltage regulator, which is used to adjust the voltage of the test equipment.

3. Shake the meter to measure the insulation resistance.

4. Grounding resistance measuring instrument is used to measure the grounding resistance of lightning arresters, grounding grids, etc.

5. Bridge, commonly used is single-arm bridge and double-arm bridge, side DC resistance, double ratio bridge mainly measures the resistance below 10 ohms, which can be accurate to six decimal places.

6. Discharge ball gap, used in cable fault detection.

7. There are also insulating oil power-saving strength testers, transformer ratio testers, etc., a lot.

The function of high-voltage test equipment: to test the dielectric strength of power equipment and power materials under the specified voltage, and test the insulation performance of the tested product.

The equipment high-voltage test is an important measure and method to test the technical indicators of substation equipment, because of its strong technical and professional nature, and the test voltage is high in the test process, so it is dangerous and destructive.

The high-voltage test auxiliary system of substation equipment of Wuhan Edian Company is based on many years of practical experience in high-voltage test, and realizes the safety and quality of high-voltage test by standardizing, rationalizing and scientificizing the test steps of substation equipment.

At the same time, the relevant test data are stored in the database, which is of great reference value for the high-voltage test work, and realizes the safety, standardization, standardization and orderliness of the test work of substation equipment. The system can be widely used in the high-voltage test field of various power plants and power supply enterprises.

Dear, I am glad to answer for you: can the high-voltage electrician test certificate do high-voltage? A:

Pro, you can high-voltage test electrician certificate is mainly engaged in 3 kinds, high-voltage electrical test, 2 times installation and commissioning and cable test, which belongs to the special type of electrician network operation license. The electrician's network access operation license is divided into three categories: low voltage, high voltage and special. Those who have obtained the low-voltage electrician's network access operation license can be engaged in low-voltage operations such as electrical installation, maintenance, and operation of voltage levels below 1,000 volts.

Those who have obtained the high-voltage electrician's network access operation license can be engaged in electrical installation, maintenance, operation and other operations of all voltage levels. Those who have obtained a special type of electrician's network access operation permit can engage in special operations such as electrical testing, secondary installation and commissioning, and cable operation on the power receiving device or power transmission device. The high-voltage electrician certificate belongs to the special operation certificate in the electrician certificate.

High-voltage electrical tests cannot be performed. Electricians have three certificates: special operation certificate, electrician network access operation license, and professional qualification certificate.

1. Special operation certificate: type of operation: electrician (commonly known as operation certificate, employment certificate), classification:

High-voltage operation and maintenance operations, high-voltage installation and repair operations, low-voltage electrical work, installation, maintenance, power generation, and power distribution. Since 2010, the old version of the special operation certificate (IC card) sample has been changed to the new version of the special operation certificate of the People's Republic of China with the second-generation ID card-like IC card, and the review is the first instance in three years, and the special operation operation certificate is renewed once every 6 years. 2. Electrician network access operation permit:

After having this certificate, it means that you have become a real electrician, and the scope of responsibility is "before the electrical equipment", such as: power station - > substation (transmission station) - in-plant (community) substation - > transformer - > switchgear. Classification:

The electrician's network access operation license is divided into three categories: low voltage, high voltage and special. I hope mine can help you, if you have any questions you can contact me at any time, I will reply to you as soon as possible.

The difference between the high-noise ruler piezoelectrician certificate and the bridge wax gas test certificate is as follows: the high-voltage electrician certificate is issued by the state, and it is a necessary certificate for high-voltage power system maintenance and technical management. Whereas, the electrical test certificate is a test organized by the unit or organization itself to evaluate the electrical skills of electricians.

The high-voltage electrician certificate can only be obtained after certain examinations and training, and has a certain degree of professionalism and authority. The electrical test certificate can be organized by any unit or organization itself, and there are no statutory examination standards and requirements. The high-voltage electrician certificate mainly examines the ability of electricians in terms of safety awareness, safe operation skills, electrical knowledge, etc., and is an important guarantee to ensure the safe operation of the power system.

On the other hand, the electrical test certificate pays more attention to the electrician's practical operation skills and the ability to solve practical problems. The high-voltage electrician's certificate generally needs to be reviewed and updated regularly to ensure that the electrician's skill level is up to date. Electrical test verification, on the other hand, does not have similar requirements and is usually only carried out at specific times and occasions.

Precautions during the operation of power frequency withstand voltage test.

1. In the process of pressure boost or withstand voltage test, if the following abnormal conditions are found.

The voltage and ammeter pointers swing a lot.

The test product makes an abnormal noise.

If it is found that the insulation is scorched or smoking, the voltage should be lowered immediately, the power supply should be cut off, the test should be stopped and the cause should be identified.

2. For the test of large-scale equipment, the airlift test of the test transformer should be carried out first, that is, the voltage should be boosted to the test voltage when the test product is not connected, so as to calibrate the indication accuracy of the instrument and adjust the ball spacing of the discharge ball gap.

3. The test personnel should do a good job in the division of responsibilities, set the safety distance of the test site, carefully check the grounding of the tested product and the test transformer, and have a special person to monitor the safety and observe the status of the tested product.

4. The main parts of the tested product should be cleaned and kept absolutely dry, so as not to damage the tested product and bring the error of the test value.

5. When doing the withstand voltage test, the boost speed should not be too fast [Industrial Electrical Appliance Network-CNELC], and prevent sudden pressurization, such as the sudden closing of the voltage regulator when it is not at the zero position, nor can it be suddenly cut off, and it should generally be opened when the voltage regulator drops to the zero position.

Precautions during the operation of the DC leak test.

1. For large-capacity samples (capacitors, ultra-long cables, etc.) during the test, the voltage should be slowly boosted to prevent the charging current of the tested product from being too large and burning out the microampere meter.

2. The test personnel should do a good job in the division of responsibilities, set the safety distance of the test site, carefully check the grounding of the tested product and the test transformer, and have a special person to monitor the safety and observe the state of the tested product.

3. During the test, the tested product, micro-ampere meter and test device should be closely monitored, and the voltage should be lowered immediately, the power supply should be cut off, and the cause should be found out once flashing, breakdown and other phenomena occur.

4. Before the test of the tested product, all external connections should be removed, and fully discharged, and the main parts should be cleaned and kept absolutely dry, so as not to damage the tested product and bring the error of the test value.