Some standard content:
Verification Regulation of theDC Resdatipe Volt Ratio Box
JJG 531—1988
Verification Regulation of theDC Resdatipe Volt Ratio Box
JJG531-1988
This verification regulation was approved by the State Administration of Standardization on February 6, 1988 and will be enforced on January 1, 1989. Responsible unit: Shanghai Municipal Bureau of Standardization and Measurement Drafting unit: Shanghai Institute of Metrology The drafting unit is responsible for interpreting the technical provisions of this regulation. The main drafter of this regulation:
Yan Lihuang (Shanghai Institute of Design and Technology 54
Technical requirements change...
Verification conditions
Verification items
Verification methods first...
Wang Verification conclusion is the processing and verification period
Appendix Sectional double technical method
Appendix 2 Terms and definitions of DC resistance voltage divider 3 Format of the certificate (or notice)
Verification regulations for DC resistance voltage divider
This regulation is applicable to newly produced, in use and in processing with fixed density, rated input voltage upper limit less than ten or equal to 1.5kV, accuracy level. 05-1.1 The calibration of plastic DC voltage divider (hereinafter referred to as divider) This regulation does not apply to auxiliary equipment.
Technical requirements
1 Appearance and marking
1. The nameplate or outer cover of the voltage divider shall have the following marks: a. Product name, model, factory number, manufacturer name or trademark; b. Accuracy grade; E. Standard shift voltage ratio:
d. Rated voltage;
. Test voltage,
1. The voltage divider pin end shall have a clear and reliable use mark, Table 1
Confirmation characters, etc.
Complete cycle conditions
New version
20 ±2
1.3 The voltage divider should have a seal position
40 -7C
20 ±2
20 = 10
20 -15
Use environment
Light
*For careful shop
25- 75
25 ~ n
Chemical change
2 The accuracy of the voltage divider, such as calibration accuracy and relative humidity, use temperature sensitivity and relative sensitivity see Table 1, and use auxiliary input voltage see Table 2. Note: Accuracy level
Calibration accessories
Human voltage
Pa positioning +:
Prohibited certificate for use
0.1 times of the rated voltage and 11 times of the rated voltage
Note: When the voltage ratio method is used, the voltage standard of the version shall be in accordance with the quality of Article 1. G.5
3 Under the test environment conditions specified in Table 1 and Table 2, the basic error of the voltage ratio of the voltage divider shall not exceed 4%: 4 The insulator resistance of the divider
4.1 Determination of the residual insulation resistance of the line insulation resistance on the DC line! When the measured voltage is 500V, the line insulation resistance The voltage is greater than or equal to 1C0L:V, and the measuring voltage is 1000V.
4.2 Under the specified voltage, the insulation value measured at any point where the voltage divider circuit is not electrically connected to the level circuit shall not exceed the value specified in Table 3.
The test should be carried out between 1-2m of applied positive voltage. The voltage of the 5-voltage divider circuit is tested.
Silicon air level
D.COO5·O.OCJ
(1.602-.3.(
6.32- 0.:
angle continuous stroke drop small space
antagonism change 4 specified reference test bed is added between all connected voltage divider boxes and the same test ground terminal, the requirement is to withstand a real sense sinusoidal current voltage of 4565H, the test lasts for 1nin, especially the breakdown or discharge phenomenon of the voltage divider, the test voltage is 44
voltage divider, the test voltage is effective, the car
no mathematical
positive protection or sticky
[minute beat special external factors; 1 low test ton for [with]
pad and the symbol is
when determining the circuit insulation voltage (standard network voltage), the larger of the common mode voltage and the maximum standard voltage value should be used as the insulation voltage. The reference grounding package for trial use shall contain no metal parts which are not electrically connected to the line. If there are metal parts on the insulating outer casing, the metal box wrapped with the tested voltage divider box (with 2 balls left between the metal box and the terminal) shall be used as the reference grounding carbon.
3. Verification conditions
Determine the environmental conditions for the voltage divider box
See Table 1 for the accuracy levels of the voltage divider box, the temperature and humidity ratios of the verification values. 2. The terminal voltage and line insulation voltage tests of the voltage divider box shall be carried out in the following specified environmental conditions: 15-35:
Relative Accuracy: [45~75]%:
Light water, freezing, flooding, waterlogging, radiation, etc. The total uncertainty of the voltage divider calibration is as follows: The total uncertainty caused by the processor, key equipment and environmental conditions shall not exceed 1/3 of the error of the voltage divider being tested
8 The main equipment for calibrating the voltage divider is:
. Standard voltage divider, standard DC potentiometer, standard DC generator and DC digital meter:, comparison instrument (current differential meter) and current detector, etc.: 567
center, insulation voltage measuring position:
d. Line insulation voltage test bench (Gaule test bench); e. Voltage source: f. Conductor. The accuracy of the voltage divider box should be as specified in Table 5, so the accuracy of the voltage divider box should not be less than 6. The current specification is: (or DC voltage) standard DC voltage level meter (): commercial voltage input is not more than 10G, and the average voltage is less than 0. 1\standard DC monthly voltage generator accuracy level is not less than 71
calibration device hip recording single degree (to the relative change caused by the rotation) less than this lower than 8 see the standard. Public hospital
standard direct hospital positive level
lan: special government power generator output mutual current output in the AC equipment chain end sound to the direct building potential whole meter (into a direct proof digital positive effect! Read the receiving piece recognition, not more than the basic error of the test point Wen Ge fraud 1/non-table
missing inspection box accuracy recognition
relative change also
deflection effect
1× I0-
1×10
Social: 13
1×t0 5
The error caused by the comparison device in the specified device should not exceed the requirements of Table 9, Table 9
The error caused by the direct current low difference meter should not exceed 1215 of the allowable reference error of the test box
The error caused by the inductance of the wire compensator and the connecting wire should not exceed 1/5 of the allowable basic error of the tested voltage transformer. The error caused by the surrounding environment should not exceed 1710 of the allowable basic error of the tested voltage transformer. The error caused by other reasons should not exceed 120% of the allowable error of the insulation resistance tester. Under the condition that the total uncertainty of the test is not exceeded, other error allocation methods can be used. 18
The error requirement for measuring insulation resistance is:
4. Measurement error 20:
b, measuring voltage 500V=10%, 000V±10%, 588
20 The requirements of the commercial test bench for the test line are:, with sufficient power efficiency, the verification method is to empty the two transmission ends of the high-voltage test closure (i.e. flat road), the voltage is raised to 5% of the test voltage, and then connect the voltage divider to be tested: observe the power supply voltage drop, the voltage drop is less than 10% of the voltage, then the high-voltage test closure is considered to have a certain transmission rate: b. Test voltage error ±2.5%;
e. After the relay action current becomes 5mA, the output current of the high voltage: d, the power supply frequency is 45.-65Fz;
: The output voltage can be adjusted continuously,
3 Verification items
21 Verification items of the voltage divider are specified in the table..Table 10
factory
appearance and line defect
continuous current limit
test typical
according to the specified purpose
about
basic adjustment type
four verification methods
newton
specification
32 verification voltage divider box, measurement adopts docking method; 1. Door 1 level and above The voltage divider can also be checked and verified by the electric method. When ensuring that the voltage divider is not twisted, the total allowable value is not certain. The lower the verification method, the lower the allowable value is. The verification data is subject to the method introduced in this program. The preheating time of the voltage divider should be preheated for half an hour at the maximum rated voltage before inspection. Or the time specified by the manufacturer should be heated. 21. Inspection of appearance and circuits. 24.! For newly produced voltage dividers, they must meet the requirements of the first service of this regulation. 212 For voltage dividers in use and after maintenance, it is allowed to have appearance defects that do not affect performance and operating safety. 24.3 Use ohmmeter to check the internal electrical components and circuits of the voltage divider box to see if there is short circuit or open circuit. 24.4 Check whether the metal parts of the voltage divider box and the terminals are in contact with each other. After checking the appearance and circuits, place the voltage divider box under the environmental conditions specified in Section 6.2 for 24 hours, measure the common insulation resistance, and conduct a line insulation voltage test. 25.1 Perform measurement according to the requirements specified in Section 4.1. 25.2 Short-circuit all the terminals of the voltage divider box and use the measuring instrument to measure the insulation voltage. The measuring end is connected to the voltage dividing line. If there is no voltage connection at any point in the line, the voltage value of the voltage measuring instrument should be read after 1 to 2 minutes of a small electric signal: 26 Line insulation voltage test
26.1 Short-circuit all the cable ends of the voltage dividing box, connect one end of the test bench to the voltage dividing box line, connect it to the reference ground terminal of the trial, and increase the voltage continuously by 10V per second until the voltage reaches the specified test voltage. If the voltage is not broken or altered, the line insulation voltage test is considered qualified. 589
The test should be carried out in accordance with the relevant safety regulations. After the insulation voltage test is completed, the voltage dividing box should be tested under the test environment conditions specified in Table 1 for 2 hours until it is stable, and then tested for an average of one month. 27.1.2 Adjust the commercial potential compensation resistor Rw of the conductor compensator to make the measured error less than 1/15 of the measured error, the conductor compensator can be removed. 27.1.3 Adjust the low potential compensation resistor Rw of the conductor compensator to make the measured error less than 1/15 of the measured error, the compensator can be removed.
27,1.4 At G, the inspection current meter is zeroed (i.e., the high and low positions are balanced!), and then the difference between the voltage output of the inspection voltage divider and the standard voltage divider is measured.
27.1.5 The voltage ratio of the inspection voltage divider is calculated as follows:
Where: Kx
-the actual voltage ratio of the general inspection voltage divider:
the nominal voltage ratio of the standard voltage divider.
| Voltage ratio method
In the figure: 1. Check:
, 2. Check the voltage (V):
, 3. Check the voltage (V):
, 4. Check the voltage (V):
, 5. Check the voltage (V):
, 6. Check the voltage (V):
, 7. Check the voltage (V):
, 8. Check the voltage (V):
, 10. Check the voltage (V):
, 11. Check the voltage (V):
, 27. 2.1 The original circuit of the voltage ratio method is shown in Figure 2. In the schematic diagram of the voltage ratio method, Y is the voltage of the voltage divider (V): 1V is the voltage of the voltage divider. The error caused by the lead resistance at the end of the voltage divider should be less than 1/5 of the allowable basic error of the voltage divider under test. The error caused by the lead resistance at the high end of the voltage divider should be less than 1/15 of the allowable basic error of the voltage divider under test. Verification steps 27.2.2 Measure the voltage of the standard DC generator, and use the rated value as the input voltage of the controlled voltage divider: Use a standard DC potentiometer (or a current digital mutual induction) to measure the output voltage Uxe of the voltage divider under test. 27,2.3 The voltage divider under test The ratio of pressure and other parameters to benzene is calculated as follows: Ks-www.bzxz.net
5. Processing of calibration results and calibration cycle
28. Calculate the K value according to the selected calibration method and formula, and if necessary, return the correction value of the standard receiver. The data of the calibration results of the concentration analyzer shall be rounded to 1/10 of the allowable basic concentration difference, and the rounding rule shall be used in the calculation.
19. Determine whether the concentration analyzer is qualified or unqualified based on the calibration results of the control items. Determine whether the concentration analyzer is qualified or unqualified based on the calibration results of the control items. Once the rounded results are used, the calibration results notification card shall be issued with the following regulations: 4
.0005-0.02 level
0.05~0.1 line
Numbers are given;
No data are generally given,
31. The calibration results are qualified or unqualified. Issue of calibration certificate for produced pressure boxes: unqualified pressure boxes will be notified by the relevant calibration station, and the unqualified items will be noted in the calibration result report: 32. For the pressure boxes delivered for inspection (including pressure boxes without the calibration certificate from the previous year and those after processing), the calibration certificate shall not be used for inspection and the old ones will not be graded; the calibration certificate shall indicate the basic error of the pressure boxes. Due to the annual stability, the box will not be graded after special verification.
33. For the pressure boxes that have passed the calibration for three consecutive years, one of the following situations shall be handled: for the pressure boxes with data, no calibration certificate shall be issued and the grade shall be given; for the pressure boxes with data, if the annual change is less than the allowable error, a calibration certificate shall be issued and the grade shall be given; c. For the pressure boxes with monthly data, if the change is larger than the allowable basic error, a calibration certificate shall be issued and the grade shall be given. The calibration cycle is shortened to half a vehicle.
34 For the pressure dividers in use that fail the calibration results, they may be downgraded to the next level according to the requirements of the pressure user, but they must still be used in accordance with the service requirements of the next level. A calibration certificate shall be issued and the downgraded level shall be indicated on the calibration certificate. 35 For the pressure dividers produced before the promulgation of this regulation and imported from abroad as much as possible (not included in the acceptance inspection in item 11), the results shall be determined based on the observed characteristics and graded according to the technical requirements of this regulation, but the existing accuracy level shall not be exceeded. The calibration certificate or calibration result notification shall indicate the calibration temperature and relative humidity, and the total accuracy of the calibration data shall also be indicated.
37 The given period of the sub-box is generally not allowed to be tested for one year. Appendix 1 Sub-acid docking method
1 The segmented docking method is carried out in accordance with Figure 1 (a) and Figure 1-16) in sequence. 1 After the sub-box under test is charged with the highest rated voltage and powered on for half an hour, it is calibrated in descending order according to the voltage ratio. 3.1 Adjust the commercial potential compensation resistance of the conductor compensator to make the G test point zero. When the error caused by the conductor resistance is less than 1/15 of the allowable basic error of the test voltage divider, the conductor compensator can be omitted. 3.2 Adjust the low potential compensation resistance of the conductor compensator to make the test point zero. When the error caused by the conductor resistance is less than 1/15 of the allowable basic error of the test voltage divider, the conductor compensator can be omitted. 3.3 When the G and G galvanometers indicate the high and low potentials, measure the output voltage of the test object and the standard voltage divider. 2.591||t t||Figure 1-1 The voltage divider box is connected in sections to achieve the function
In the figure, G:: The current meter can be removed during the season (the lead light): the core
R, convenient
—make up V:
[n—standard voltage rise sensitive output voltage (V);
x—sensitive control voltage divider for external section transmission (V); a standard voltage divider (there is a voltage divider for the energy group to increase the energy): a voltage divider box (the current difference needs to be exposed in the whole line): Y—normal input voltage (V).
3.4 The voltage ratio of the voltage divider is calculated by the following formula:
Kx -Ex
Wu Zhong: Kx
Replace the actual user of the voltage divider section
Any 1-1 voltage divider section principle
Standard voltage divider range nominal voltage of the section
Figure, 4K—compensation voltage positive "V), V—provided sliding voltage divider grid output voltage ratio
4 Segment docking method (Figure 1-1b) test step 4, 1 adjust the high potential compensation resistor R of the conductor compensator, so that the G galvanometer points.
1V): sensitive voltage divider output voltage (Vx boost requires rated voltage main (Vm= Um); other lines between medical 1.1 (a): When the fast difference caused by the conductor resistance is less than 115 of the allowed basic card recognition difference of the tested sub-box, no line compensation is required, 4.2 Adjust the low potential compensation resistor R of the conductor compensator to 0. When the error caused by the conductor voltage is less than 1/15 of the allowable error of the tested voltage divider, the conductor compensation chip is not required. 4.3 At (1, (check the low and high potential balance of the meter), measure the voltage difference between the tested voltage divider and the standard voltage divider. Then use the following formula to prove: Kr=Kull+ Ux!
In the composition: Kx-
The actual voltage of the voltage test box:
The standard voltage of the standard box.
5The voltage ratio of the voltage divider to be tested is calculated as follows: Kx=Ax
The above is the verification method of the single-section docking method: Appendix 2 Nomenclature and Definitions of DC Resistor Voltage Dividers 1 DC Voltage Divider Box (formerly known as Voltage Divider Box) (3)
A device composed of a fixed ratio resistor network that provides input and output voltages of equal power, with the input and output voltages between a pair of terminals. The voltage divider can have one or more ratios. The latter type can be divided into a fixed output type (Figure 2-1 (a)) or a fixed output type: Figure 2-1 (b) ia
: It can be used with a direct value potentiometer to forget the maximum range of the amplifier. o
Insert 0
2, set the voltage
minimum or the three values of the voltage in the nameplate of the transformer. 3 Standard voltage ratio
The ratio of the input voltage to the rated output voltage 4 Actual voltage ratio
The ratio of the applied input voltage to the open transmission voltage, the line station is like the medium voltage (nominal line voltage) 5
Figure 2-1
In order to prevent the high voltage from being recorded to the ground by the voltage divider box, the voltage divider is designed from the insulation point of view: the voltage of the line can be different from the instantaneous positive voltage (standard voltage). 6. The additional equipment necessary to make the voltage divider box accurately and safely measure the maximum voltage. 8. The static electricity is low and the leakage current is prevented from affecting the measurement station. |An external shell or layer, it is not affected by external static electricity. 9 basic value
In order to determine the accuracy of the voltage divider, the core value of each ratio is the nominal voltage.
The difference between the nominal value and the point value is measured by the error expressed as a ratio of the standard value
The error is the quotient obtained by the standard value.
It can be expressed as a percentage of a few million volts. Indicated by. 12 Basic error
The error of a measuring instrument under specified working conditions. Note: (1) “Normal working conditions” refers to the micro-working conditions specified in the calibration procedure, (2) Basic error
13 Accuracy grade
Grade or level divided according to the accuracy of the measuring instrument. 14 Verification conditions
The provisions of the calibration procedures on the metrological standards, control equipment and environmental conditions used. 15 Verification cycle
The interval between two consecutive calibrations of a measuring instrument. 16 Verification certificate
The document certifying the accuracy of a measuring instrument,
Verification notice
The document proving that the measuring instrument has failed the calibration. 18 Stability means that within the specified working conditions, certain properties of the measuring instrument remain unchanged over time. 19 Sensitivity means that the measuring instrument has a small reaction to changes in the measured quantity. Given a given measured value, the sensitivity S of the measuring instrument is expressed as the quotient of the increase in the measured variable and the corresponding increase in the measured volume: S=
Formula: -||tt| ...
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