JB/T 7082-1993 Insulation dielectric withstand voltage test equipment
Some standard content:
1 Subject content and scope of application
Petroleum Industry Standardization Technical Committee
Mechanical Industry Standard of the People's Republic of China
Insulating medium withstand voltage test equipment
JB/T7082-1993
This standard specifies the basic parameters, technical requirements, test methods and inspection rules of insulating medium withstand voltage test equipment (hereinafter referred to as withstand voltage test equipment). Among them, withstand voltage test equipment refers to power frequency withstand voltage test equipment used to inspect the insulation performance of electrical products. This standard applies to withstand voltage test equipment with a maximum output voltage of 20kV and below and a frequency of 50Hz sine wave. 2 Reference standards
GB4793
Safety requirements for electronic measuring instruments
GB/T12501 Classification of protection against electric shock of electrical and electronic equipmentGB3100
GB3101
GB1002
GB2099
ZBY003
ZBY002
3 Terms
International System of Units and its application
Related General principles of quantity, unit and symbolPreferred number and priority number system
Type, basic parameters and dimensions of single-phase plugs and socketsTechnical conditions for single-phase and three-phase plugs and sockets
Soft cables (wires) for connecting polyvinyl fluoride insulated cables (wires) with rated voltage of 450/750V and belowGeneral technical conditions for packaging of instruments and meters
Basic environmental conditions and test methods for transportation and storage of instruments and meters3.1 The terms "voltage" and "current" in this standard refer to effective values. 3.2 Class 1 equipment
This class of equipment not only relies on basic insulation for protection against electric shock, but also includes an additional safety precaution, which is to connect the accessible conductive parts to the installed protective grounding terminal so that the accessible conductive parts will not become live bodies in the event of damage to the basic insulation.
4 Basic parameters
4.1 Power supply voltage, frequency and waveform of withstand voltage test equipment: Power supply voltage: AC 220V, tolerance ±10%; a.
Frequency: 50±1Hz;
Waveform: basic sine wave.
4.2 Maximum output voltage, frequency and waveform of withstand voltage test equipment, a.
The maximum output voltage of withstand voltage test equipment should try to adopt the priority number, see Table 1, its value is taken from the R\10 series in GB321, if necessary, special specifications can be adopted according to the test voltage range required by the user. Approved by the Ministry of Machinery Industry on October 8, 1993
Implementation of 1994-0101
Output voltage frequency: 50±1Hz
Output voltage waveform: basic sine wave.
JB/T70821993
4.3 The rated output current of the withstand voltage test equipment shall not be less than the short-circuit current value specified in the standards of the tested products, and the alarm current shall be less than the rated output current.
The withstand voltage test equipment shall have the function of arbitrarily setting the alarm current. The priority number of the alarm current setting value is taken from the R10/3 series in GB321, as shown below:
0.5, 1, 2, 5, 10, 20, 50, 100, 200mA. 4.4 The maximum output power nominal value of the withstand voltage test equipment is equal to the capacity of the step-up transformer, that is, the product of the maximum output voltage and the rated output current.
5 Technical requirements
5.1 General requirements
5.1.1 The withstand voltage test equipment shall be manufactured according to the drawings and technical documents approved by the prescribed procedures. The panel of the withstand voltage test equipment should have buttons and indicators for power on and high voltage on. The voltmeter should be placed in an obvious and easy-to-read position. The output terminals should clearly mark the high voltage end and the ground end. The output voltage should be able to be gradually adjusted from zero to the test voltage, and then gradually adjusted from the test voltage to zero. There should be an output voltage zero return interlock protection, that is, the voltage regulator does not return to zero and the test transformer cannot be connected. Only the one-second withstand voltage test for the production line allows the voltage zero return interlock protection to be released, and the voltage sudden increase method is adopted. If the test is passed, a "normal" signal should be sent; if the leakage current exceeds the set value, the high voltage should be automatically cut off immediately, accompanied by an "excess leakage" sound and light alarm. 5.1.2 The withstand voltage test equipment should be able to be used normally under the following environmental conditions: a. Ambient air temperature: 5~40℃; b. Atmospheric pressure: 70~J06kPa; c. Relative air humidity: 20%~80%. Note: The above provisions are the safe working environment conditions for instruments used indoors. The withstand voltage test equipment can sometimes withstand a temperature of 5~-10℃ without reducing its safety. 5.2 Appearance quality 5.2.1 The shell of the withstand voltage test equipment should have no obvious defects, and the coating of the shell should have no delamination and peeling. 5.2.2 The text symbols of various quantities and units on the panel of the withstand voltage test equipment should comply with the requirements of GB3100 and GB3101, and the printing or engraving should be clear and obvious and not easy to erase.
5.3 Maximum output power
The actual maximum output power of the withstand voltage test equipment shall not be less than 80% of the nominal value, and shall be assessed by load voltage drop, that is, after the rated load is connected, the voltage drop of the test voltage shall not be greater than 10%. 5.4 Electric shock protection
The withstand voltage test equipment shall have good electric shock protection measures and shall comply with the requirements of Class 1 equipment specified in GB12501. 5.4.1 The operating shafts of knobs, handles, etc. are not allowed to be energized. 5.4.2 The external knobs, handles, etc. of the components or assemblies used to control the power supply voltage shall be made of insulating materials. 5.4.3 The housing and components used for electric shock protection shall have sufficient mechanical strength. 5.4.4 Ventilation holes shall not be allowed above the live parts to prevent hanging metal foreign objects (such as necklaces) from entering the machine and contacting the live parts. 5.5 Accuracy level and allowable error
5.5.1 The output voltage accuracy level and allowable error shall comply with the provisions of Table 2. 94
Petroleum Industry Standardization Technical Committee CPSC Output voltage accuracy level
Allowable error%
JB/T 70821993
5.5.2 The output voltage reference error is expressed by formula (1): UU.
Where: Y——reference error, %,
U—high voltage output indication value, V;
U. Actual high voltage output value, V,
U.——Upper limit of high voltage output indication value, V. 5.5.3 The alarm current relative error is expressed by formula (2): 6
Where: -—alarm current relative error, %; A-alarm current nominal value, mA
A,—alarm current actual value, mA.
5.5.4 The alarm current allowable error shall comply with the provisions of Table 3. mA
Nominal value of alarm current
Allowable error%
5.5.5 The relative error of test voltage duration is expressed by formula (3)TT
Where: &-relative error of test voltage duration, %;T--nominal value of test voltage duration, $;T,--actual value of test voltage duration, S. ×100%
5.5.6 The allowable error of test voltage duration shall comply with the provisions of Table 4. Table 4
Test voltage duration 3
Allowable error, %
5.6 Leakage current
The leakage current value between each pole of the power supply of the withstand voltage test equipment and the accessible conductive parts shall not be greater than 5mA. 5.7 Insulation resistance
5.7.1 The insulation resistance between the power input terminal of the withstand voltage test equipment and the metal casing shall not be less than 20MO. 5.7.2 The insulation resistance between the high-voltage output terminal and the metal casing of the withstand voltage test equipment shall not be less than the calculated value of formula (4): [20+10(Um-1)]M0
Wherein: Ur——the maximum output voltage of the withstand voltage test equipment, kV5.8 Withstand voltage
The insulation should be able to withstand a test voltage with a basic sinusoidal waveform and a frequency of 50Hz for one minute. The test voltage value and the application location are shown in Table 5.
Test voltage application location
1. Between the power input terminal and the metal casing
2. Between the high-voltage output terminal and the metal outer casing
The maximum output voltage U... is 2~6kV
The maximum output voltage U... is 8~20kV
During the test, the leakage current should not exceed the limit value. 5.9 Grounding device
JB/T7082-1993
Test voltage
2U..+1-0.02U.
The accessible metal parts of the withstand voltage test equipment that are easily charged when the insulation fails must be permanently and reliably connected to the grounding terminal inside the instrument or the grounding pin of the instrument inlet socket, and meet the following requirements: 8. Threaded terminals should be used in grounding connections. b. There should be no danger of corrosion when all parts of the grounding terminal are in contact with the grounding copper conductor or other metal conductors. c.
The resistance value between the grounding terminal or grounding pin and the parts that need to be connected to it shall not be greater than 0.5α. d. The grounding terminal or grounding pin should be clearly marked with a permanent protective grounding symbol, and the symbol cannot be marked on detachable parts.
5.10 Internal structure and circuit connection
The internal structure and circuit connection of the withstand voltage test equipment shall meet the following requirements: The internal structure of the equipment should be designed and manufactured so that when any wire, screw, washer, spring and similar parts are loose or fall off, it should not a.
cause the accessible metal parts to be charged.
b. The strength of the connection of wires subject to mechanical stress should not rely solely on welding. Before welding, they should be tightened by other methods. c. The length of the screws used to fix the back cover, bottom plate, etc. should be limited to ensure that the creepage distance and electrical interruption between the accessible parts and the live parts meet the requirements of this standard.
d. The replaceable parts that determine the creepage distance and electrical interruption should be marked. The plastic wire used for internal connection should comply with the relevant provisions of GB5023.3. e.
It is not allowed to make internal connections between accessible parts and power circuits with neutral lines. f.
When the cover is opened during normal operation and the parts with a voltage of more than 1kV become accessible, the cover should be equipped with an electrical interlock, and the power should be cut off when opening. The cover and accessible parts should be marked with a red lightning symbol. 5.11 Power connection and power switch
5.11.1 Components directly connected to the grid power supply shall meet the following requirements; plugs and sockets connecting the grid power supply and the withstand voltage test equipment shall comply with the provisions of GB1002 and GB2099. a.
The flexible cable connecting the withstand voltage test equipment and the grid power supply shall meet the requirements of GB5023.3, among which the wire b.
core with yellow/green double-color marking is only allowed to be connected to the grounding terminal of the equipment and the grounding pin of the plug, and the length of the flexible cable shall not be less than 2.5m. The withstand voltage test equipment must be equipped with a power switch and shall meet the following requirements: 5.11.2
The power switch shall have sufficient breaking capacity. When the power switch is turned off, all components of the instrument and each pole of the power supply shall be disconnected, but the circuit of the protective grounding system shall not be cut off. b.
The on and off positions of the power switch shall be clearly marked, and signal lights shall not be used alone for indication. c.
5.12 Creepage distance and electrical clearance
The creepage distance and electrical clearance between the components of the withstand voltage test equipment shall comply with the provisions of Article 9.5.4 of GB4793. 6 Test method
6.1 Test conditions
6.1.1 The environmental conditions of the test shall meet the following requirements: 96
Ambient air temperature: 15~35℃;
b. Relative humidity: 45%~75%;
Atmospheric pressure: 86~106kPa.
6.1.2 The total uncertainty during the test is as follows: JB/T 7082~1993
The total uncertainty of the test caused by the standard instrument, auxiliary equipment and environmental conditions shall not exceed 1/3 of the allowable error of the test object. 6.2 Appearance inspection
Inspect by visual inspection.
The inspection results shall meet the requirements of Article 5.2. 6.3 Marking inspection
Inspect by visual inspection and the following test.
First, wipe the marking with a wet cloth soaked in water for 15 seconds, then wipe it with a cloth soaked in alcohol for 15 seconds. The marking should be easily recognizable. The inspection results should meet the requirements of Articles 5.2.2, 5.9d, 5.10d, 5.10g, 5.11.2c, and 8.1. 6.4 Electric shock protection inspection
Inspect by visual inspection and the finger touch test specified in Article 9.1 of GB4793. The inspection results should meet the requirements of Article 5.4.
6.5 Accuracy measurement and output power measurement
6.5.1 Output voltage accuracy measurement
6.5.1.1 The measurement circuit is shown in Figure 1.
～220V
AC regulated power supply
R—Load resistance
6.5.1.2 Requirements for measuring instruments and equipment;
K—Switch
NSTest withstand voltage test equipment
H—Voltage transformer
V-—AC voltmeter
The error caused by the voltage fluctuation of the AC regulated power supply should be less than 1/10 of the allowable error of the measured voltage. a.
The error of the voltage transformer shall not be greater than 1/10 of the allowable error of the measured voltage. b.
c. The error of the digital AC voltmeter shall not be greater than 1/4 of the allowable error of the measured voltage. Under the condition of ensuring accuracy, it is allowed to use a pointer-type AC voltmeter.
The R value is calculated according to formula (5):
Where: R—load resistance, kn;
U——maximum output voltage, kV;
P-—nominal value of maximum output power of test equipment, kVA. 6.5.1.3 Measurement steps
Zero position.
JB/T 70821993
Without load, switch K, disconnect, connect the line, set the voltage regulator to zero position, turn on the power, adjust the pointer of the high-voltage output indicator instrument to gradually increase the output voltage, align the pointer of the high-voltage output indicator instrument with the scale line with digital markings, and quickly read the voltage indication UAvM on the digital AC b.
voltmeter. www.bzxz.net
c, measure the output voltage from small to large, and then from large to small. d. Calculate the actual value of the output high voltage according to formula (6): U, = KUA
Where: K-voltage transformer ratio;
Uav-digital AC voltage representation value, V. e. Calculate the reference error of the high voltage output according to formula (1), and find the graduation lines of the maximum positive and negative errors (6)
Connect the load, turn on the switch K, and measure again at the graduation lines of the maximum positive and negative errors and the full-scale line to calculate the reference error f.
6.5.1.4 The reference error shall comply with the provisions of Article 5.5.1. 6.5.1.5 If there are two output voltage ranges, measure the accuracy separately. 6.5.2 Alarm current accuracy measurement
6.5.2.1 The measurement circuit is shown in Figure 2.
～220V
一AC regulated power supply
K, switch
6.5.2.2 Requirements for measuring instruments and equipment
Tested withstand voltage test equipment
R-negative resistor
A——AC ammeter
一adjustable resistor
The error of the digital AC ammeter should be less than 1/4 of the allowable error of the measured current, and its minimum resolution is 1/10 of the allowable error. Under the condition of ensuring accuracy, pointer-type AC ammeter is allowed. 6.5.2.3 Measurement steps
a. Turn on the switch Ks to short-circuit the resistor R. The R value is the same as that in Article 6.5.1.2. R' is an adjustable resistor, set to the maximum value, and the R' resistance value is calculated according to formula (7):
R'=1000V
Where; Ax-nominal value of the alarm current to be measured, mA. (kn)
b. When the output voltage rises to nearly 1000V, gradually reduce the resistance of the variable resistor R' and observe the current reading on the AC digital ammeter at the same time. When R' is reduced to the point where a voltage breakdown alarm sounds, quickly read the indicated value on the AC digital ammeter, which is the actual value of the alarm current. Under the condition of ensuring accuracy, R' can also be adjusted without adjusting, and the output voltage can be adjusted to reach the alarm. C. Repeat the measurement three times for each nominal value. The relative error of each measurement result is calculated according to formula (2). All should comply with the provisions of Article 5.5.4. When the data is given, take the average of the three results. d. Disconnect switch K, and measure the maximum nominal value of the alarm current again. At this time, gradually increase the output voltage to make the test equipment 98
JB/T7082—1993
emit a breakdown alarm. Quickly read the indicated value of the AC current. Measure three times in succession. The results should comply with the requirements of Article 5.5.4. 6.5.3 Measurement of the accuracy of the withstand voltage test duration. 6.5.3.1 Requirements for measuring equipment
Hand-held electronic stopwatch with a resolution of 0.01s. When the accuracy of the test duration is required to be higher, a digital millisecond meter should be used. 6.5.3.2 Measurement steps:
a. Press the electronic stopwatch while removing the timing button. When you hear and see the sound and light signal that the test time has reached, press the stopwatch again. This time is the actual value of the withstand voltage test duration. Repeat the measurement three times, calculate the relative error of the duration according to formula (3), and each time it should meet the requirements of Article 5.5.6. When the data is given, take the average of the three measurement results. 6.5.4 Load voltage drop assessment for output power measurement. 6.5.4.1 The measurement circuit is shown in Figure 1.
6.5.4.2 The requirements for the instruments and equipment used for measurement are the same as those in Article 6.5.1.2. 6.5.4.3 Measurement steps
Do not connect the load, switch K, disconnect, the output voltage of the tester rises to the maximum value, and the AC voltage value is UAv. According to formula (6), the actual value of the output voltage at this time is:
The output voltage adjustment disk of the tester remains unchanged, and switch K is turned on. At this time, the reading of the digital voltmeter is U\AvM. b.
Calculate the relative value of voltage drop according to formula (8): c.
UU'M×100% ..
β is not greater than 10%, which meets the requirements of Article 5.3. 6.6 Leakage current measurement
The measurement circuit is shown in Figure 3.
Figure 3 Leakage current measurement device of Class 1 safety instrument directly connected to the protective grounding terminal 1-Accessible conductive parts
2-Grid power supply
3-Conversion switch
The equipment should be placed on an insulating pad and powered by a high-voltage transformer so that the equipment can work at the highest output voltage. +*（8）
Measure the leakage current value between each pole of the power supply and the accessible conductive parts in turn, and the measurement results should meet the requirements of Article 5.6. 6.7 Insulation resistance measurement
6.7.1 The measurement circuit is shown in Figure 4.
～220V
MO-—megohmmeter
JB/T7082—1993
Tested withstand voltage test equipment
6.7.2 Use a DC 500V or DC 1000V megohmmeter for measurement. 6.7.3 The measurement steps are as follows:
Measurement switch
Connect one end of the megohmmeter test terminal to the test equipment housing or the ground terminal, and the other end to the power input line (phase line and neutral line connected together), 8.
The resistance value reading on the megohmmeter should meet the requirements of Article 5.7.1. b. Switch the megohmmeter test terminal connected to the power input line to the high-voltage output terminal of the tester, and the measurement result should meet the requirements of Article 5.7.2. Note: The terminal connected to the ground terminal in the test equipment must be disconnected first before testing. 6.8 Withstand voltage test
6.8.1 The measurement circuit is shown in Figure 5.
BZNS—Standard withstand voltage test equipment
6.8.2 Standard withstand voltage test equipment shall meet the following requirements: a.
Test voltage accuracy ±2.5%;
Alarm current 5mA, allowable error ±10%; K
Test voltage duration 1min, allowable error ±5%. 6.8.3 Test steps are as follows
Alarm current value of standard withstand voltage test equipment 5mA; a.
Test withstand voltage test equipment
Measurement switch
First test between the power input terminal and the shell, the applied voltage starts from no more than half of the full value of the test voltage, and then quickly b.
Increase to the full value and last for 1min, then quickly reduce to less than half the value, and then disconnect the power supply. Then test between the high voltage output terminal and the shell. .
The test results shall meet the requirements of Article 5.8.
Note: The terminal connected to the ground terminal in the test equipment must be disconnected before testing. Semiconductor devices that may be damaged can be open-circuited, short-circuited or replaced with simulated 100
objects during the test.
Inspection of grounding device
Inspect by visual inspection and the following methods.
JB/T7082—1993
The resistance value between the accessible metal parts and the protective grounding terminal is measured by the following method: When a single-phase alternating current of 25A is passed, the voltage drop across the resistor should not exceed 12.5V. At this time, the corresponding resistance value is not greater than 0.5a. The inspection result should meet the requirements of Article 5.9.
6.10 Inspection of internal structure and circuit connection
Inspect by visual inspection and manual test.
The inspection result should meet the requirements of Article 5.10. 6.11 Inspection of power connection and power switch
Inspect by visual inspection, manual test and measuring tools.
The inspection results shall meet the requirements of Article 5.11. 6.12 The creepage distance and electrical clearance shall be measured in accordance with the method specified in Article 9.5.4 of GB4793. The measurement results shall meet the requirements of Article 5.12. 7 Inspection rules
7.1 Each withstand voltage test equipment must pass the factory inspection items specified in Article 7.3 before leaving the factory, and a product certificate shall be attached. 7.2 Type inspection shall be carried out in any of the following situations. a. When the trial production of a new product is completed;
When changes in design or process may cause changes in certain performance; b.
When the factory inspection results have an unacceptable deviation from the previous type inspection results; c.
Regular sampling of products.
7.3 The items listed in this standard are type inspection items. The tests are carried out in the following order, and those marked with "*" are factory inspection items. Appearance inspection*
Marking inspection*
Electric shock protection inspection
Accuracy measurement (including output voltage, alarm current, test time)Output power measurement
Leakage current measurement
Insulation resistance measurement*
Withstand voltage test*
Grounding device inspection
Internal structure and circuit connection inspection
Power connection and power switch inspection
Creep distance and electrical inter-ohm measurement
7.4 The inspection shall be carried out on a prototype in the order specified in Article 7.3, and all of them shall pass. 9
Marking, packaging, transportation, storage
8.1 The withstand voltage test equipment shall be marked with the following items: Product name;
Product model:
Maximum output voltage;
Maximum output power;
Manufacturer name or trademark,
Factory number.
Petroleum Industry Standardization Technical and Safety Committee CFSC
JB/T7082—1993
8.2 Each withstand voltage test equipment shall be accompanied by the following documents when leaving the factory: 8.2.1 Product certificate
8.2.2 Instruction manual
8.3 The packaging, transportation and storage of withstand voltage test equipment shall comply with the relevant provisions of ZBY003 and ZBY002. 9
Warranty period
If the user follows the provisions of the instruction manual, and is properly packaged, transported, stored and used, within one year from the date of shipment, including 6 months from the date of use, if the damage or malfunction occurs due to poor manufacturing quality, the manufacturer shall repair or replace it for the user free of charge.
Additional remarks:
This standard is proposed and managed by the Shanghai Electric Tool Research Institute of the Ministry of Machinery Industry. This standard is drafted by the Shanghai Electric Tool Research Institute of the Ministry of Machinery Industry. The drafter of this standard is Li Meifen.1 The measurement circuit is shown in Figure 4.
～220V
MO-—megohmmeter
JB/T7082—1993
Tested withstand voltage test equipment
6.7.2 Use a DC 500V or DC 1000V megohmmeter for measurement. 6.7.3 The measurement steps are as follows:
Measurement switch
Connect one end of the megohmmeter test terminal to the test equipment housing or the ground terminal, and the other end to the power input line (phase line and neutral line connected together), 8.
The resistance value reading on the megohmmeter should meet the requirements of Article 5.7.1. b. Switch the megohmmeter test terminal connected to the power input line to the high-voltage output terminal of the tester, and the measurement result should meet the requirements of Article 5.7.2. Note: The terminal connected to the ground terminal in the test equipment must be disconnected before testing. 6.8 Withstand voltage test
6.8.1 The measuring circuit is shown in Figure 5.
BZNS—Standard withstand voltage test equipment
6.8.2 The standard withstand voltage test equipment shall meet the following requirements: a.
Test voltage accuracy ±2.5%;
Alarm current 5mA, allowable error ±10%; K
Test voltage duration 1min, allowable error ±5%. 6.8.3 The test steps are as follows
Alarm current value of standard withstand voltage test equipment 5mA; a.
Test withstand voltage test equipment
Measurement switch
First test between the power input terminal and the shell, the applied voltage starts from no more than half of the full value of the test voltage, and then quickly b.
Increase to the full value and last for 1min, then quickly reduce to less than half the value, and then disconnect the power supply. Then test between the high voltage output terminal and the shell. .
The test results shall meet the requirements of Article 5.8.
Note: The terminals connected to the grounding terminal in the test equipment must be disconnected before testing. Semiconductor devices that may be damaged can be open-circuited, short-circuited or replaced with simulated 100
objects during the test.
Inspection of grounding device
Inspect by visual inspection and the following methods.
JB/T7082—1993
The resistance value between the accessible metal parts and the protective grounding terminal is measured by the following method: When a single-phase alternating current of 25A is passed, the voltage drop across the resistor should not exceed 12.5V. At this time, the corresponding resistance value is not greater than 0.5a. The inspection results shall meet the requirements of Article 5.9.
6.10 Inspection of internal structure and circuit connection
Inspect by visual inspection and manual test.
The inspection results shall meet the requirements of Article 5.10. 6.11 Inspection of power connection and power switch
Inspect by visual inspection, manual test and measuring tools.
The inspection results shall meet the requirements of Article 5.11. 6.12 The creepage distance and electrical clearance shall be measured in accordance with the method specified in Article 9.5.4 of GB4793. The measurement results shall meet the requirements of Article 5.12. 7 Inspection rules
7.1 Each withstand voltage test equipment must pass the factory inspection items specified in Article 7.3 before leaving the factory, and a product certificate shall be attached. 7.2 Type inspection shall be carried out in any of the following situations. a. When the trial production of a new product is completed;
When changes in design or process may cause changes in certain performance; b.
When there is an unacceptable deviation between the factory inspection results and the previous type inspection results; c.
Regular sampling of products.
7.3 The items listed in this standard are type inspection items. The tests are carried out in the following order. The items marked with "*" are factory inspection items. Appearance inspection*
Marking inspection*
Electric shock protection inspection
Accuracy measurement (including output voltage, alarm current, test time)Output power measurement
Leakage current measurement
Insulation resistance measurement*
Withstand voltage test*
Grounding device inspection
Internal structure and circuit connection inspection
Power connection and power switch inspection
Creep distance and electrical clearance measurement
7.4 The inspections shall be carried out on a prototype in the order specified in Article 7.3, and all of them shall pass. 9
Marking, packaging, transportation, storage
8.1 The withstand voltage test equipment shall be marked with the following items: product name;
Product model:
Maximum output voltage;
Maximum output power;
Manufacturer name or trademark,
Factory number.
Petroleum Industry Standardization Technical Safety Committee CFSC
JB/T7082—1993
8.2 Each withstand voltage test equipment shall be accompanied by the following documents when leaving the factory:8.2.1Product certificate
8.2.2Instruction manual
8.3The packaging, transportation and storage of withstand voltage test equipment shall comply with the relevant provisions of ZBY003 and ZBY002. 9
Warranty period
If the user follows the instructions for use, and is properly packaged, transported, stored and used, the manufacturer shall repair or replace the product free of charge within one year from the date of shipment, including six months from the date of use, if the product is damaged or malfunctions due to poor manufacturing quality.
Additional notes:
This standard was proposed and managed by the Shanghai Electric Tool Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Shanghai Electric Tool Research Institute of the Ministry of Machinery Industry. The drafter of this standard is Li Meifen.1 The measurement circuit is shown in Figure 4.
～220V
MO-—megohmmeter
JB/T7082—1993
Tested withstand voltage test equipment
6.7.2 Use a DC 500V or DC 1000V megohmmeter for measurement. 6.7.3 The measurement steps are as follows:
Measurement switch
Connect one end of the megohmmeter test terminal to the test equipment housing or the ground terminal, and the other end to the power input line (phase line and neutral line connected together), 8.
The resistance value reading on the megohmmeter should meet the requirements of Article 5.7.1. b. Switch the megohmmeter test terminal connected to the power input line to the high-voltage output terminal of the tester, and the measurement result should meet the requirements of Article 5.7.2. Note: The terminal connected to the ground terminal in the test equipment must be disconnected before testing. 6.8 Withstand voltage test
6.8.1 The measuring circuit is shown in Figure 5.
BZNS—Standard withstand voltage test equipment
6.8.2 The standard withstand voltage test equipment shall meet the following requirements: a.
Test voltage accuracy ±2.5%;
Alarm current 5mA, allowable error ±10%; K
Test voltage duration 1min, allowable error ±5%. 6.8.3 The test steps are as follows
Alarm current value of standard withstand voltage test equipment 5mA; a.
Test withstand voltage test equipment
Measurement switch
First test between the power input terminal and the shell, the applied voltage starts from no more than half of the full value of the test voltage, and then quickly b.
Increase to the full value and last for 1min, then quickly reduce to less than half the value, and then disconnect the power supply. Then test between the high voltage output terminal and the shell. .
The test results shall meet the requirements of Article 5.8.
Note: The terminals connected to the grounding terminal in the test equipment must be disconnected before testing. Semiconductor devices that may be damaged can be open-circuited, short-circuited or replaced with simulated 100
objects during the test.
Inspection of grounding device
Inspect by visual inspection and the following methods.
JB/T7082—1993
The resistance value between the accessible metal parts and the protective grounding terminal is measured by the following method: When a single-phase alternating current of 25A is passed, the voltage drop across the resistor should not exceed 12.5V. At this time, the corresponding resistance value is not greater than 0.5a. The inspection results shall meet the requirements of Article 5.9.
6.10 Inspection of internal structure and circuit connection
Inspect by visual inspection and manual test.
The inspection results shall meet the requirements of Article 5.10. 6.11 Inspection of power connection and power switch
Inspect by visual inspection, manual test and measuring tools.
The inspection results shall meet the requirements of Article 5.11. 6.12 The creepage distance and electrical clearance shall be measured in accordance with the method specified in Article 9.5.4 of GB4793. The measurement results shall meet the requirements of Article 5.12. 7 Inspection rules
7.1 Each withstand voltage test equipment must pass the factory inspection items specified in Article 7.3 before leaving the factory, and a product certificate shall be attached. 7.2 Type inspection shall be carried out in any of the following situations. a. When the trial production of a new product is completed;
When changes in design or process may cause changes in certain performance; b.
When there is an unacceptable deviation between the factory inspection results and the previous type inspection results; c.
Regular sampling of products.
7.3 The items listed in this standard are type inspection items. The tests are carried out in the following order. The items marked with "*" are factory inspection items. Appearance inspection*
Marking inspection*
Electric shock protection inspection
Accuracy measurement (including output voltage, alarm current, test time)Output power measurement
Leakage current measurement
Insulation resistance measurement*
Withstand voltage test*
Grounding device inspection
Internal structure and circuit connection inspection
Power connection and power switch inspection
Creep distance and electrical clearance measurement
7.4 The inspections shall be carried out on a prototype in the order specified in Article 7.3, and all of them shall pass. 9
Marking, packaging, transportation, storage
8.1 The withstand voltage test equipment shall be marked with the following items: product name;
Product model:
Maximum output voltage;
Maximum output power;
Manufacturer name or trademark,
Factory number.
Petroleum Industry Standardization Technical Safety Committee CFSC
JB/T7082—1993
8.2 Each withstand voltage test equipment shall be accompanied by the following documents when leaving the factory:8.2.1Product certificate
8.2.2Instruction manual
8.3The packaging, transportation and storage of withstand voltage test equipment shall comply with the relevant provisions of ZBY003 and ZBY002. 9
Warranty period
If the user follows the instructions for use, and is properly packaged, transported, stored and used, the manufacturer shall repair or replace the product free of charge within one year from the date of shipment, including six months from the date of use, if the product is damaged or malfunctions due to poor manufacturing quality.
Additional notes:
This standard was proposed and managed by the Shanghai Electric Tool Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Shanghai Electric Tool Research Institute of the Ministry of Machinery Industry. The drafter of this standard is Li Meifen.
Periodic random testing of products.
7.3 The items listed in this standard are type inspection items. The tests are carried out in the following order. The items marked with "*" are factory inspection items. Appearance inspection*
Marking inspection*
Electric shock protection inspection
Accuracy measurement (including output voltage, alarm current, test time)Output power measurement
Leakage current measurement
Insulation resistance measurement*
Withstand voltage test*
Grounding device inspection
Internal structure and circuit connection inspection
Power connection and power switch inspection
Creep distance and electrical clearance measurement
7.4 The inspections shall be carried out on a prototype in the order specified in Article 7.3, and all of them shall pass. 9
Marking, packaging, transportation, storage
8.1 The withstand voltage test equipment shall be marked with the following items: product name;
Product model:
Maximum output voltage;
Maximum output power;
Manufacturer name or trademark,
Factory number.
Petroleum Industry Standardization Technical Safety Committee CFSC
JB/T7082—1993
8.2 Each withstand voltage test equipment shall be accompanied by the following documents when leaving the factory:8.2.1Product certificate
8.2.2Instruction manual
8.3The packaging, transportation and storage of withstand voltage test equipment shall comply with the relevant provisions of ZBY003 and ZBY002. 9
Warranty period
If the user follows the instructions for use, and is properly packaged, transported, stored and used, the manufacturer shall repair or replace the product free of charge within one year from the date of shipment, including six months from the date of use, if the product is damaged or does not work properly due to poor manufacturing quality.
Additional instructions:
This standard was proposed and managed by the Shanghai Electric Tool Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Shanghai Electric Tool Research Institute of the Ministry of Machinery Industry. The drafter of this standard is Li Meifen.
Periodic random testing of products.
7.3 The items listed in this standard are type inspection items. The tests are carried out in the following order. The items marked with "*" are factory inspection items. Appearance inspection*
Marking inspection*
Electric shock protection inspection
Accuracy measurement (including output voltage, alarm current, test time)Output power measurement
Leakage current measurement
Insulation resistance measurement*
Withstand voltage test*
Grounding device inspection
Internal structure and circuit connection inspection
Power connection and power switch inspection
Creep distance and electrical clearance measurement
7.4 The inspections shall be carried out on a prototype in the order specified in Article 7.3, and all of them shall pass. 9
Marking, packaging, transportation, storage
8.1 The withstand voltage test equipment shall be marked with the following items: product name;
Product model:
Maximum output voltage;
Maximum output power;
Manufacturer name or trademark,
Factory number.
Petroleum Industry Standardization Technical Safety Committee CFSC
JB/T7082—1993
8.2 Each withstand voltage test equipment shall be accompanied by the following documents when leaving the factory:8.2.1Product certificate
8.2.2Instruction manual
8.3The packaging, transportation and storage of withstand voltage test equipment shall comply with the relevant provisions of ZBY003 and ZBY002. 9
Warranty period
If the user follows the instructions for use, and is properly packaged, transported, stored and used, the manufacturer shall repair or replace the product free of charge within one year from the date of shipment, including six months from the date of use, if the product is damaged or malfunctions due to poor manufacturing quality.
Additional notes:
This standard was proposed and managed by the Shanghai Electric Tool Research Institute of the Ministry of Machinery Industry. This standard was drafted by the Shanghai Electric Tool Research Institute of the Ministry of Machinery Industry. The drafter of this standard is Li Meifen.
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