Some standard content:
Verification Regulation ofHighYoltageCapacitance Bridge
JJ54631988
Verification Regulation ofHighYoltageCapacitance Bridge
JJG563-1988
The verification regulation ofhigh voltage capacitance bridge was approved by the state metrologist on May 13, 1968, and implemented on March 13, 1989. Responsible unit: National Charging Station
Drafting unit: National Commercial Voltage Metering Station
The drafting unit is responsible for the interpretation of the technical provisions of the regulation. The main initiators of this standard are: Wang Le'er (National Commercial Voltage Metering Station) Rong Jia Drafters: Jiang Le (Chijiashang Voltage Metering Station) Wang Shougang (National High Voltage Metering Station) Zhang Yun (Shanghai Luguang Instrument Factory) Contact: Technical requirements·Verification conditions·Verification methods·Verification result processing and verification cycle… Appendix 1 Principle and steps of calibrating high-voltage capacitor bridge by equal-power bridge method Appendix 2 Principle and steps of calibrating high-voltage capacitor bridge by voltage-controlled bridge method Appendix? Principle and steps of the high-voltage capacitor bridge verification by the current comparator method Principle of the high-voltage capacitor bridge verification by the current comparator method Principle of the high-voltage capacitor bridge verification by the current shunt method Appendix S
Principle of the high-voltage capacitor bridge verification by the standard consumption coupon method Appendix 6
Appendix
Examples of verification data processing
Verification procedures for high-voltage capacitor bridges
This regulation is applicable to the verification of high-voltage self-capacitors of the type and current comparison type manufactured by the manufacturer, after neutralization and ringing, under the condition of 1 version voltage. This regulation is not applicable to the verification of the circuit part of the high-voltage bridge used as the bridge. II. OverviewwwW.bzxz.Net
1 Working principle of high-voltage capacitor bridge
From the working principle, the high-voltage capacitor bridge is considered to be a device for measuring the ratio of power frequency current. When the high-frequency high-voltage string is connected to the capacitor and the effective equipment, a current component proportional to their capacitance and dielectric loss factor is generated. After the power-frequency current component is proportionally measured, the capacitance ratio and dielectric loss factor of the measured equipment relative to the high-frequency current path are obtained. 2 Classification of high-voltage self-capacitance bridges
2.1 Xilin type high-voltage capacitor bridge
This type of bridge is composed of a current ratio resistor: the current flowing through the reference current is connected in parallel with a capacitor to indicate potential balance.
2.2 Current ratio soft-controlled high-voltage bridge
This type of bridge is composed of a current ratio code and a current ratio winding of an ergometer. The ratio of the current flowing through the multi-phase circuit is assumed to be symmetrical. The magnetic potential balance is used. According to the shift ratio, this type of bridge can be divided into active and passive types. The two capacitor circuits directly shift the phase of the light source. An active one uses a resistor and capacitor element to shift the phase in quadrature. The magnetic potential synthesis method is used to achieve the required phase shift,
3 high voltage circuit components
3 work ratio zero proposal:
standard voltage capacitor
standard low voltage shunt:
standard current transformer
screen old circuit source regulator.
Three requirements
1 Accuracy of high voltage capacitor bridge
Before the national standard of high voltage self-piercing electrolysis bridge is issued, the accuracy level of high voltage self-piercing electrolysis capacitance ratio measurement is 0.001, 0.002, 0.005, 0.01, 0.02, 0.05, 0.1, 0.2, 1.5. 1, 2, 5,
Dielectric difference measurement accuracy variables are respectively 1.5: 1, 2, 5, 105 Basic error of high voltage capacitor bridge
5.1 The basic error of high voltage capacitor bridge can be expressed as: 518
5.2 The basic error of high voltage self-piercing electrolysis bridge can be expressed as: AX -
1, 0.1X0.521
5.3 The meaning of each symbol is:
-allowable absolute error of capacitance ratio:
-allowable absolute error of dielectric loss factor difference: A. The capacitance ratio measurement expressed as a fraction B. The dielectric loss factor difference measured with a fraction is the accuracy level X-capacitance ratio apparent value;
D. Dielectric loss factor difference measurement value:
-capacitance ratio range calibration value, which is the value of the ratio rounded off to one effective digit. 5.4 A two-way capacitance bridge with a built-in range extender is provided. The following table lists the calibration values for each pair of capacitance ratios. The accuracy level of the program is planned or expressed by the formula or table 6
For a commercial voltage-capacitive bridge equipped with an AC power supply, the insulation between the plug and the accessible metal parts of the bridge shell should be more than 10M, and it can withstand the 50H1.5kV upper string voltage test for 1min without breakdown: If the battery has a terminal directly connected to a high positive voltage, the insulation between the terminal and the accessible metal parts of the shell should be more than 10M, and it can withstand the 5Hz1.5kV upper string voltage test for 1min without breakdown. Under the conditions of use, operation and storage specified by the manufacturer, the lightning bridge meets the requirements of the original accuracy level for 2 years.
8 screen release regulator and industrial zero position
and the independent circuit regulator used in conjunction with the mutual bridge, no matter it is manual adjustment or automatic adjustment, when adjusted to the equilibrium state specified by the bridge, the change in the measured value caused by the bridge is significantly less than the 10% allowable error of the bridge and the industrial frequency zero position that the bridge can use. Its high-order suppression ratio and cross-control coefficient are two frequency indicators. For the dielectric loss factor of grade .5, it should be less than 10.5, and for 1 microsecond less than 40%, the actual value should be no less than 3dB. The time of the power frequency zeroing instrument is less than 4s: the zeroing degree of the vehicle should meet the following requirements: when the bridge is within the specified working range, if the bridge is adjusted by a deflection equivalent to 1/10 of the allowable error: the deflection of the instrument is not less than 1rm
The zeroing instrument is powered on with a power supply voltage: 31r.in, and the zero drift of the measurement result should be less than 10% of the allowable error.
9 Appearance & Marking
The appearance of the capacitor bridge and the matching transformer should be completed, and the conversion should be completed! The switch and terminal markings should be clear and complete, the connectors should be in good contact, the switch should be flexible and accurate, the high-voltage bridge should have model, name, original line diagram, shift, schedule, accuracy level, working current range and factory maintenance marks, high-voltage capacitors should have year, dielectric overvoltage factor, factory number and other marks, three verification conditions
18 environment and power supply conditions
the layout of the inspection institute should be The unit of the test voltage is V, the unit of the test voltage is A. The error caused by the external influence is 1. Or when the polarity of the test voltage is changed, the difference between the previous and next indications is 5. When the test voltage is higher than the current lead, the allowable error is 5. When the test voltage is higher than the current lead, the test conditions in Table 1 should be met. Table 1
High-voltage bridge protection
Annual agent
2, 5, 10
Environmental product spot
ac :0
Electricity period modulus
Electricity voltage technical and commercial safety system certification
Before the light check, the test and analysis and verification equipment should be valid for more than 24 hours under the specified environmental conditions shown in Table 1. II
Specify the types, names, uses, accuracy levels and other technical parameters of the standard solutions used in the verification of various equipment, engraved in Table 2, Table 2
Sensitive valley clearing data
Reactance ratio meter
Many intentions and benefits of the day
Gas monitoring certificate
Offshore gas protection electric control camera
Capacitance conversion
Gas production and sales
Standard oil electrical frost
Precision electric diagram model
Marking resistance
Lake! Fan Contains
X: UI~5
X:0.0C1-S
X: 3.01-5
D:3.3--10
X: :--5
D:05-10
In the court
Beijing shooting situation national effect
#5×10 4
1x10-3
No.×10
Note: The core element shows the ratio measurement, the table must be slightly more than the internal effect measurement, the accuracy of the film to make the car A, the points show the capacitance rate of the test is correct, the national measurement market level reading standard month time full see:
people pressure k, the voltage nytov
time Henry
is 11-
11.2 The power frequency used during the calibration should meet the requirements of Article 8, 11.3 The current used for the calibration should not be less than the minimum working current specified under the electric correction. 1.4 The temperature and humidity meter used during the calibration shall have an error less than 1/5 of the allowable variation of the battery in Table 1. The calibration is to measure the T frequency meter on the day of the calibration. The allowable change range is 012. The structure of the standard should be checked in accordance with the requirements of this specification. All the switches should be not less than 10% of the full stroke. 1. The marked grounding terminal outside the bridge body should be grounded separately. The new or repaired electric cup shall be tested according to Article 5 of this specification. It is better to use the electric correction in the middle. It is better to use the meter with a voltage of 500V or above. The insulation voltage is qualified and the first level can be withstand voltage test. If the power bridge has defects in the performance of the single sound meter, it should be repaired and returned for calibration. Four calibration items and calibration methods
13 The calibration of high-voltage capacitors can adopt the overall calibration method or the component calibration method. The whole-piece calibration method is to open a high-frequency current with a ratio difference as the bridge discharge object under the condition of the bridge set, so as to determine the measurement error of the electric correction. The indirect component calibration method is to decompose the proportioner and phase shifter of the output bridge into independent components, and then determine their tolerances according to the calibration procedures or measurement methods of the relevant components. After the tolerances are integrated. The AC bridge or other local calibration instruments used for subsequent calibration or measurement of components should ensure that the measurement error of the measured component is not less than 1/5 of the permissible error of the measured current. After calibration, you should also select a point at the beginning, middle and larger part of each range for supplementary calibration.
14 The calibration error mainly includes the calibration equipment error and the calibration method error. Regardless of the calibration method used, the uncertainty of the calibration result should be less than 1/3 of the allowable error of the bridge. 15 Overall calibration of high voltage bridge capacitance ratio measurement accuracy 15.1 Calibration of capacitance ratio measurement accuracy 15.1.1 When calibrating the capacitance ratio measurement accuracy of high voltage bridges, the number of points D on the loss factor dial is D<0, where A The capacitance ratio of this quantity is measured and the accuracy level is indicated. A
15.1.2 For the fast current, this range should be calibrated point by point. The calibration point selection is recommended to be carried out in accordance with Table 3 series. The calibration points are ×100: ×1000 and ×1U. The basic range of the current comparator is calibrated. If the calibration point selection is carried out in accordance with Table 4 series, it is allowed to only calibrate the first island point by point. If the point selection method can guarantee the first three points, it is considered to be calibrated point by point. If the point selection method can guarantee the first three points, it is recommended to calibrate the first three points. If each indication of the three dials (10 may not be included) is within the calibration point, then the appropriate reduction of the calibration point is allowed.
For the calibration of non-basic range, the selection point of the range can be referred to, and it is also allowed to be calibrated by selecting one point for each of the initial part, middle part and the last part of each dial range: Table 3
Standard Shubiben
Bridge indication
054.n184R8.2
Note: Total 10 points are added,
7427 23
Electric indication
Standard forest handicap
Electric change group
Note: H is compared with the change relationship
0.222 222
0.586 69E
1).44 4H14
The capacitance ratio can be measured accurately by the force method. The accuracy level of the correction can be determined by referring to Table 5. The various verification methods listed in Table 5 are introduced in the comparison, and the calculation formula is given. 15.2 Verification of the accuracy of the dielectric difference measurement When verifying the accuracy of the high-voltage narrow bridge dielectric difference measurement, the capacitance ratio point should have a non-zero indication, and consider the relationship between the capacitance ratio value and the dielectric loss factor indication. This relationship is listed in Table 6. 5
Two-way
D.C01 -0.02
Equal power frequency, electrical comparison instrument, 0.05 -5
suffer from the problem of flow into the component, the market is lacking in transportation,
according to the yuan piece inspection, the standard resistance test is not used for the nine-screen induction potential of the power plant: the exciting 6
and other types of electrical beauty
sexuality method
according to the voltage conduction
zhonglian equivalent
and the quality number
institute type
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wind north relatively post
and other power electrical property management, capacitor light replacement method,
current ratio instrument method
and other power electrician, busy replacement method:
current soil relatively instrument sales, standard use resistance method
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15.2.2 The basic range of dielectric loss factor measurement is calibrated point by point: The starting point of the calibration is 0.5 to 2 levels 1×10-+, and the calibration points are only allowed to be completed to 1×10622:5 and 10-110. During the calibration, the rectification coefficient and the stop coefficient shall be determined according to the type of the tested bridge and the calibration method. 15.2.4 In general, it is allowed to be slightly reduced to approximately the starting point of each range for non-H dielectric loss factor measurement. Select a point in the front part of the tested bridge for calibration: 15.2.5 The method for calibrating the measurement accuracy of the dielectric loss factor difference can refer to Table 8 and the bridge grade shall be selected: Their principles and calculation formulas are introduced in the first recording. Table 8
2, 5, 13
Current control method
Nanometer method
Transmitting control method,
Low-voltage
Public
High-voltage
Nanometer method
Abstract voltage
Standard key energy consumption core
Generation: The above test results are not used. 1. Energy-saving electrical analysis, five-test result processing and test cycle
16. When the whole test high-voltage capacitor needs to be measured and the bridge capacitance ratio needs to be measured and the accuracy is high, the maximum error of the electric car is calculated as follows: 16.1
AX = X
D = - - D
The whole book determines the accuracy of the measurement of the dielectric loss factor difference of the capacitor bridge. The corrected measurement error is calculated according to the following formula
16.3 The meaning of each line number
Absolute error of electrical ratio;
Ax - x-cx.k.
Absolute error of the dielectric loss factor difference:
Capacitance ratio indication;
C—Individual dielectric loss factor indication;
Cr, Dx
Ca, Ds
Cke Ds
Cset Ps
The capacitance and dielectric loss factor value connected to the terminal: The output capacitance and dielectric loss factor value connected to the C terminal: The equivalent capacitance and dielectric loss factor value connected to the C terminal: The equivalent capacitance and dielectric loss factor value connected to the (S terminal: The zero value of the individual loss factor,
K.-…Correction coefficient, refer to Table 6 to select the
termination system, refer to Table 7 to select,
Item 4 above is determined, and the measurement difference is calculated, and then the allowable error is reduced by 10. With the bridge and the parts, the calculated value shall prevail.
17 Evaluation of the test results
17.1 Overall test, the tested circuit is tested according to the procedure in the first 15 If the error of the selected measuring point does not exceed the basic error range specified in Article 5, the range will be qualified. 623
17.2 According to the component verification date, the component shall be verified or tested according to Article 12. If the component error does not exceed the error range specified in the relevant technical conditions, and the overall verification supplemented by Article 17.1 is also qualified, the range will be qualified.
17.3 The accuracy level is determined by the actual error of the individual process. 19 Verification certificate
18.1 The name, manufacturer, model number and factory code of the high-voltage electrical component to be tested shall be stated on the verification certificate.
1.2 For high-voltage positive capacitance bridges with a capacitance ratio measurement accuracy index less than 1, the calibration certificate can be listed as having been inspected. In general, only the calibration results can be given. 1 For commercial-voltage capacitance bridges that have passed the calibration, a calibration certificate will be issued. The calibration results of the calibration process will be listed on the certificate.
2 If the basic range fails the calibration, it should be repaired. If it still fails after the calibration, it can meet all the technical requirements and error range of the level after downgrading, then it is allowed to be downgraded to that level for use, and a certificate for that level will be issued. The non-downgrading situation should be noted on the certificate.
2 Calibration period: Generally, it shall not exceed 2 years. For high-voltage bridges that are used frequently, the calibration period should be appropriately shortened. Appendix 1 Principle and steps of equal power bridge method for testing high voltage bridge 1 Principle circuit
Equal power bridge, standard bilateral transformer ratio, named because of its equal power measurement capability: Use equal power bridge method to test high voltage capacitors The circuit diagram of bridge capacitance ratio is shown in the figure. NE
In the figure: T1-voltage regulator:
T test transformer
1VT1kV single-disk inductive rectifier
C: C——standard air capacitor:
QS—tested capacitor.
2 Test the commercial bridge receiving potential at Cx and ground terminals. Select C2=10UWpF, connect Cx and Cx terminals, connect CCs terminals, and make the bridge or the [: measurement of the 624
column, and set the bridge indication value to be within X, and D. Then and C, exchange, set the other bridge reading is X, profit D, Ga-1I Xgxa fDi, pe-xo-D.
Then select the required ratio according to the specification 15.1. When the duty ratio is K, the added self-generated voltage is times the heart: set the bridge reading at this time and D, then Ce=x-iD
According to the scale 16.1, the bridge reading difference can be calculated: AXX-FXu
When the larger ratio is tested, it can be selected, 10000F, heart = 1000F, use /10 voltage ratio and convex bridge 1:1 ratio gear to measure, repeat the above steps after heating,
The inductive voltage divider needs to be proportional to the front. The rate error is E1, then formula (3! and (4) can be written as AX=X-KX,-KXse
AD=D-Du+8
1Test (and (s end without the ten-ground potential high-voltage lead electrolysis step shadow (5:
Use the second step to grab the speed number of the electrolysis type 3, 3/, 3, 3 right, 3/5, 3/4 ratio, just need to add the positive term in formula (4), that is,
+1-,1R4 (0)
AD-DD-(X-1
13183)
Then select a switch box with accuracy not less than B/10 and time constant not more than 10-, connect it in series on the C side, preset resistance value R=R4, and then repeat the above steps to determine the difference of 3/2, 31. When a larger ratio is specified, refer to the relevant content of case 2. The preset resistance value of the switch box is R=R4. The bridge under test does not have the ability to measure negative loss. When the negative loss factor is not greater than 1-, the resistance method under the voltage case can be used to set the additional data: 5 The equal-power bridge method is not applicable to the bridge without shielding potential [QS 1), Appendix 2 Principle and steps of low-voltage conductor method for calibrating high-voltage electric bridge 1 The method of low-voltage conductor is a new calibration method designed according to the theory of electric sinking. The original circuit is shown in the figure. In the figure: T voltage regulating circuit:
xian whole transformer!
ikV single-disk inductive divider:
1V five-disk inductive divider:
H—T frequency meter;
R—1.83n cup standard voltage:
Cit——[C00pF standard air capacitor; whole voltage capacitor bridge,
assuming that the voltage is at C, then the commercial voltage of C, the voltage t is at R The high potential range. The impedance of the x and C terminals to the ground is, and 2, the current of the x and C terminals is and: then -
HR11RZ
tiaRG,
R+2,) GT
Formula [1 shows that both the Western special bridge and the current comparator bridge can be used for low-voltage correction. The only difference is the zero position static positive value. 2 fixed step rate
Set L-[Use the test bridge in the measurement center of Figure 2, and set the current display values to Xc and Ln. After the heat is connected from the process 15.2 The preset dielectric loss factor value is set at the selected point. When the number changes from 111-6 mm to 17-3, the preset value of the quality loss factor changes from 10-* to 1, and the preset value during the inspection is Ds, the bridge indication is × and, according to the specification 1t., 2, the calculation results are
AX-XK,X
3 low-temperature abnormality bridge suitable for shielding potential (such as S1), Appendix 3 Principles and steps of the electric passenger rotation method for verifying high-voltage electric cellar bridge [Electric through transposition) GT
Formula [1] shows that both the current comparator bridge and the current comparator bridge can be used for low-voltage correction. The only difference is the size of the zero-position static positive value. Set the L-[ test bridge at the center of the measurement in Figure 2, and set the current readings to Xc and Ln. After the hot connection is made, select the point from the program 15.2 to set the preset dielectric loss factor value. When the signal is from 111-6 mm to 17-3, the preset value of the quality loss specification changes from 10-* to 1, and the preset value is Ds, the bridge indication is × and, according to the specification 1t., 2, it is calculated that
AX-XK,X
3 is suitable for the shielding potential of the library bridge (such as S1), Appendix 3 The principle and steps of the electric passenger rotation method to calibrate the high-voltage bridge) GT
Formula [1] shows that both the current comparator bridge and the current comparator bridge can be used for low-voltage correction. The only difference is the size of the zero-position static positive value. Set the L-[ test bridge at the center of the measurement in Figure 2, and set the current readings to Xc and Ln. After the hot connection is made, select the point from the program 15.2 to set the preset dielectric loss factor value. When the signal is from 111-6 mm to 17-3, the preset value of the quality loss specification changes from 10-* to 1, and the preset value is Ds, the bridge indication is × and, according to the specification 1t., 2, it is calculated that
AX-XK,X
3 is suitable for the shielding potential of the library bridge (such as S1), Appendix 3 The principle and steps of the electric passenger rotation method to calibrate the high-voltage bridge
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