Some standard content:
Withstanding Voltage Tester Trial Verification Regulation
JJG 795—1992
Withstanding Voltage Tester Trial Verification Regulation
Verification Regulation ef
Withstanding Vabtage JJG755-1992 This verification procedure was approved by the State Technical Inspection Bureau on June 18, 1992, and was implemented on May 1, 1993. The original unit: Sichuan Provincial Standard Measurement and Testing Bureau The reform unit: Chengdu Metrology Testing Institute The technical provisions of the procedure are the units responsible for the interpretation of the main drafters of this regulation: Chen Ju (Chengdu Metrology Testing Institute) Chen Yannan (Chengdu Metrology Testing Institute, co-drafters: Wang Rongjia (Chengdu Balance Instrument Factory) Li Xuanman (Chengdu Instrument Factory) Wang Xinglu (Chengdu Daping Instrument Factory) Technical requirements Lan, Verification parts...
4 Verification date
5 Verification method
6 Verification result processing and verification period
Appendix 1 Format of the back of the verification certificate of the withstand voltage tester 2 Format of the verification record of the withstand voltage tester
Trial verification procedures for withstand voltage testers
Technical procedures apply to the verification of pointer-type or digital withstand voltage testers (called untested devices) produced, used and statically handled by the ten parts. Its output voltage is an AC voltage below 100V. The withstand voltage tester is an instrument for testing the withstand voltage of various low-voltage electrical appliances. The instrument can adjust the AC (or current) test voltage and the specified breakdown (protection) current required by the tester: when the test voltage reaches the specified value under the required test voltage, the tester will automatically or passively cut off the test voltage: "- If the breakdown current exceeds the set breakdown (protection) current, the output voltage will be automatically cut off and the current will be automatically cut off at the same time." 1.1 The pre-voltage tester shall have the following marks: specification, lead, manufacturer's name, factory number, manufacturing date, rated voltage and nominal capacity. 1.2 The newly produced electrical tester shall have the mark of its production license. 1.3 The withstand voltage tester shall have obvious electrical output mark and other necessary marks to ensure correct use. 1.4 Withstand voltage tester 1.5 The withstand voltage tester shall be equipped with a clear grounding device and anti-melting device. 1. There shall be no other defects that may cause errors and affect the safety of personnel. 2
2.1 The insulation resistance of the withstand voltage output device to the machine shall not be less than M2.2 The power supply shall not be less than 2M. 3.1 The output voltage is divided into multiple parts, which can be adjusted to the required scale value within each period. 3.2 The output voltage is DC voltage or AC voltage: AC voltage should be the actual stop wave, and its distortion should not exceed 5%: DC voltage coefficient should not exceed 5% 1.3 The error of the output voltage indication shall not exceed 5%. 4 Breakdown current setting error
The actual current value when the alarm is triggered or the output voltage is automatically cut off should be less than the set breakdown current! 5%: 5 Capacitor
51 The maximum output current of the withstand voltage tester under the rated input voltage is not less than 25A, 5.2 The actual output capacity of the withstand voltage tester shall not be less than 90% of the nominal capacity, 6 Time automatic tax system error
The actual value of the withstand voltage tester time automatic control shall not exceed the set signal + 5%, 762
50 Absolute power group
2500V Hong Kong except mountain danger agriculture
Lost the test (or the device:
Distortion meter
Three verification cases
State absolute training
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.3 The whole inspection system should be placed in an environment without obvious vibration and impact. 8 Insulation gloves and good grounding wires should be equipped to ensure the safety of the inspection personnel. See Table 1 for the inspection items. 10 See Table 2 for the inspection items. "○" in the table indicates inspection: \x" indicates exemption from inspection. 2
Inspection items
indicates the real world
system effect
medium voltage indicator
high voltage current error | |tt||Timely design
Convenient
5 Verification method
11 Carry out appearance inspection according to the key points of 1-1 of this regulation. Among them, those that do not meet the requirements of 1.2 to 1.6 will not be subject to the F-step verification
12 Insulation
12.1 Disconnect the ground terminal of the high-voltage terminal from the shell. 12.2 The insulation resistance of the high-voltage user terminal to the light is verified by a 25IV insulation resistor: the insulation resistance of the power terminal to the machine is verified by a 5 12.3 Reconnect the high voltage output terminal and ground it. 12.4 If the result does not meet any of the requirements in 2.2 to 2.3, do not proceed. 13.1 Voltage test according to the distortion of AC output voltage 13.2 Set the voltage withstand tester to AC state, open the voltage reducer according to Figure 1, and connect the current meter and the distortion tester.
Figure! True Qing Qian Line People
1 Voltage withstand test position: 2 one electric five
3—distortion meter; 4—distortion meter
2 Measure ripple coefficient against specification
1—withstand voltage microsphere: 2—power supply voltage: 3—difference phase difference: 4—small ripple
13.2 Turn on the power supply, adjust the voltage to the provisional value. At the same time, adjust the input voltage of the distortion meter to within the allowable input voltage range,
13.3 Test the distortion and record the distortion value. If it meets the requirements of 3.2, the voltage tester will output the ripple coefficient of the three-phase DC voltage tester 14.! After the withstand voltage tester is switched to the DC state, connect the distorsion meter and the oscilloscope according to the 2nd order. 14.2 Turn on the power supply, adjust the input voltage to the specified value, and use the oscilloscope to measure the peak-to-peak value of the return voltage. 14.3 At the same time, record the reading of the oscilloscope and the peak-to-peak value of the effective oscilloscope on the instrument. 14.4 Calculate the ripple factor ≤%
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or the peak-to-peak value of the medium V ripple voltage
V-DC voltmeter reading according to the following formula.
15 The output voltage indication value of the electric measuring instrument is set to the difference ()
5. Measure the difference between the voltage range of each box and the measured voltage range of the withstand voltage. The following points are selected by adding or reducing the test points according to 500V: 300V and above: 000V. Including-reporting the need to increase the inspection point
15,2 The accuracy rate of the electrostatic voltmeter used is obtained by combining the following formula with the selection of the range: 754
The indication of the test point of the withstand voltage test is: The accuracy level of the medium voltage single range of the withstand voltage test: The range of the electrostatic meter:
The accuracy level of the electrostatic voltmeter. 15.3 The voltage difference is verified by the reverse connection method according to Figure 5.
15.4 The voltage withstand test must be carried out at the test points specified in 15.1: Test twice in the same way, and take the average value as the test value. 15.5 Record the voltage indication and the static voltage measurement value of each test point of the tester. Calculate the output error of each test point according to the following formula.
Output voltage indication value:
- The measured value of the static voltage meter.
Main line
1 - receiving + auxiliary test. 1—night electricity + clothes 15.6 according to the formula (3! A calculation to get the transmission three indications said that the school should be full of the scale 3.3 more requirements. 15.7 withstand the test standard, the indication setting prohibits the connection to use the distributor as shown in 4 to stop the voltage reduction book to reach the test. Any distributor reduces the voltage medical
a withstand ratio; 2—: voltage
16 breakdown current error
16.1 According to Figure 5 to connect the measurement compensation.
money: the breakdown current connection line of the country
voltage test instrument 2--current safety control: 3—electric material (2)
16.2. For the test of the AC and DC output, the AC and DC output errors shall be measured respectively.
16.3 The setting value of the breakdown current shall be set in the order from small to large. And the milliampere resistance in Figure 5 shall be matched with the measured breakdown current range.
16.4 Set the resistance value of the switch box to the maximum value, start the power-on period, adjust the output voltage to between 500V-1000V, 16.5 Slowly adjust the value of the resistance box from large to small, the DC test instrument shall sound an alarm or cut off the output circuit, and record the current value reached. Repeat the brush test for many times and take half the average value. Calculate the set error S of this current according to the following formula:
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wherein is the average daily breakdown voltage of the optical beam:
—the agreed value of the breakdown voltage.
16./Calculate the set error of the optical beam by formula (4); it should meet the requirements of Article 4, 17. The withstand voltage test only requires
17.1 Select the good delay value according to the following formula and connect the circuit according to Figure 5. R
VGeneral rated voltage
Read the figure 6
1 Voltage: Three-board resistance:
3-Post and telecommunications: 4-Ah meter
Vrx x to
Set the withstand voltage tester to 17.2
5m, and then gradually increase the voltage, and the voltage tester should be able to detect the device.
17.3 Select the negative resistance according to the formula, and measure the voltage in reverse according to Figure 6.
Rated input voltage:
Nominal capacity.
1.4 Turn on the withstand voltage tester, then gradually increase the output voltage to a fixed value, record the readings of the electrostatic voltmeter and the milliammeter, and calculate the output voltage according to the formula, which should meet the requirements of Section 5.2. - VxI
Output—the reading of the voltage meter:
I——the reading of the safety meter.
18 Time automatic control error
18.1 Set the time control of the withstand voltage tester to the automatic mode, and then set the control time from small to large. 18.2 Turn on the output voltage of the withstand voltage tester to 5V, and then turn off the output voltage. (7)
18.3 Turn on the output voltage, select the indicator. When the output voltage is first opened to 500V, start timing, and stop timing when the test state stop signal appears. Test three times in a row and record the time readings, collect the average value and calculate the time setting error S according to the following formula.
Where—the control time setting value;
T is the half-mean value of the control time.
18.4 The time setting error S shall meet the requirements of Article 6: 2 x.100%
VI. Processing and verification results
19 During the adjustment, the measured data and the calculated results shall be recorded in the format of the appendix. (8)
20 The original data shall be adjusted first. After adjustment, they shall be listed in the verification certificate or verification result notice as the verification result. The adjustment result shall be made by the four-in-five method so that the final error of the verification result is not greater than one tenth of the allowable error
21 According to the technical requirements of 1 to 6, the obtained standard results shall be compared to determine whether the electronic measuring instrument is qualified: 2 After the static three-stage test, it shall be recalibrated before it can be used. 23. The certificate of withstand voltage test shall be issued according to the inspection method. If there is any problem, the inspection result shall be issued. 24. The original record sheet and the format of the inspection certificate (on the back) shall be copied. 25. The inspection cycle of the electric bed test is one year. Each time the inspection is submitted, the previous inspection certificate shall be brought along. Appendix 1. Format of the back of the withstand voltage test certificate Temperature change: , External resistance: 2. Insulation resistance: , Power terminal to machine resistance: , Commercial terminal to machine resistance: 3. Output voltage distortion (AC): , Output voltage distortion coefficient {C): , 4. Capacity: t||Additional, current correction value (mA):
Electric positioning
Electric blast correction
VI. Electric stop correction value (V):
After the display
VII. Time correction value (:
Beam treatment position
Humidity:
Settings
Unit
Terminal:
Environmental conditions: Temporary||tt ||Vehicle number
Such as inspection station:
Appendix 7 Voltage withstand test position calibration record set type calibration record table (1)
Calibration record table (2)
Insulation switch: Guoheng constant for machine standard,
High voltage screen for machine casing:
, Input voltage loss degree (AC):
Output voltage liquid coefficient (1X)
4. Loading quantity: nominal capacity
actual measured capacity
, mains load current
change position
, time control
actual measured position
immediate correct position
fast correct release
thank you ()
reading charge (%)
t, voltage indication: kV)
calibration record sheet (3)
restore some100%
VI. Processing and verification of verification results
19. Record the measured data and calculation results in the format of the appendix during the adjustment. (8)
20. The original data must be adjusted first. After adjustment, it shall be listed in the verification certificate or verification result notice as the verification result. The adjustment result shall be made by the four-in-five method so that the final error of the verification result is not greater than one tenth of the allowable error
21. According to the technical requirements of 1~6, compare with the obtained standard results to determine whether the electronic measuring instrument is qualified: 2. After the adjustment, the three-stage test shall be recalibrated before it can be used. 23. The certificate of withstand voltage test shall be issued according to the inspection method. If there is any problem, the inspection result shall be issued. 24. The original record sheet and the format of the inspection certificate (on the back) shall be copied. 25. The inspection cycle of the electric bed test is one year. Each time the inspection is submitted, the previous inspection certificate shall be brought along. Appendix 1. Format of the back of the withstand voltage test certificate Temperature change: , External resistance: 2. Insulation resistance: , Power terminal to machine resistance: , Commercial terminal to machine resistance: 3. Output voltage distortion (AC): , Output voltage distortion coefficient {C): , 4. Capacity: t||Additional, current correction value (mA):
Electric positioning
Electric blast correction
VI. Electric stop correction value (V):
After the display
VII. Time correction value (:
Beam treatment position
Humidity:
Settings
Unit
Terminal:
Environmental conditions: Temporary||tt ||Vehicle number
Such as inspection station:
Appendix 7 Voltage withstand test position calibration record set type calibration record table (1)
Calibration record table (2)
Insulation switch: Guoheng constant for machine standard,
High voltage screen for machine casing:
, Input voltage loss degree (AC):
Output voltage liquid coefficient (1X)
4. Loading quantity: nominal capacity
actual measured capacity
, mains load current
change position
, time control
actual measured position
immediate correct position
fast correct release
thank you ()
reading charge (%)
t, voltage indication: kV)
calibration record sheet (3)
restore some100%
VI. Processing and verification of verification results
19. Record the measured data and calculation results in the format of the appendix during the adjustment. (8)
20. The original data must be adjusted first. After adjustment, it shall be listed in the verification certificate or verification result notice as the verification result. The adjustment result shall be made by the four-in-five method so that the final error of the verification result is not greater than one tenth of the allowable error
21. According to the technical requirements of 1~6, compare with the obtained standard results to determine whether the electronic measuring instrument is qualified: 2. After the adjustment, the three-stage test shall be recalibrated before it can be used. 23. The certificate of withstand voltage test shall be issued according to the inspection method. If there is any problem, the inspection result shall be issued. 24. The original record sheet and the format of the inspection certificate (on the back) shall be copied. 25. The inspection cycle of the electric bed test is one year. Each time the inspection is submitted, the previous inspection certificate shall be brought along. Appendix 1. Format of the back of the withstand voltage test certificate Temperature change: , External resistance: 2. Insulation resistance: , Power terminal to machine resistance: , Commercial terminal to machine resistance: 3. Output voltage distortion (AC): , Output voltage distortion coefficient {C): , 4. Capacity: t||Additional, current correction value (mA):
Electric positioning
Electric blast correction
VI. Electric stop correction value (V):
After the display
VII. Time correction value (:
Beam treatment position
Humidity:
Settings
Unit
Terminal:
Environmental conditions: Temporary||tt ||Vehicle number
Such as inspection station:
Appendix 7 Voltage withstand test position calibration record set type calibration record table (1)
Calibration record table (2)
Insulation switch: Guoheng constant for machine standard,
High voltage screen for machine casing:
, Input voltage loss degree (AC):
Output voltage liquid coefficient (1X)
4. Loading quantity: nominal capacity
actual measured capacity
, mains load current
change position
, time control
actual measured position
immediate correct position
fast correct release
thank you ()
reading charge (%)
t, voltage indication: kV)
calibration record sheet (3)
restore some
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