This part specifies the test methods and test procedures for routine tests, type tests and special tests of contact voltage regulators and contact automatic voltage regulators. JB/T 7070.1-2002 Test Guidelines for Voltage Regulators Part 1: Test Guidelines for Contact Voltage Regulators and Contact Automatic Voltage Regulators JB/T7070.1-2002 Standard download decompression password: www.bzxz.net

ICS29.180
Machinery Industry Standard of the People's Republic of China
JB/T7070.1—2002
Replaces JB/T7070.1-1993
Test guide for regulators
Part 1: Test guide for variable regulators and automatic variable regulators2002-07-16 Issued
2002-12-01 Implementation
The State Economic and Trade Commission of the People's Republic of China Issued Foreword,
Normative references
3. Terms and definitions,
General requirements for tests.
Test items and test procedures
General inspection,
Inspection purpose
6.2 Inspection method.
Winding resistance measurement test
Test purpose ,
7.2 Test method
8 Power frequency withstand voltage test,
8.1 Test purpose.
8.2 Test method..
Induction withstand voltage test,
Test purpose.
Test method
Repeated insulation test
Operating mechanism (control mode and operating mechanism) test 11
11.1 Test purpose
11.2 Test method,
12 No-load test
12.1 Test purpose ..
12.2 Test method.
13 Load test.
13.1 Test purpose..
13.2 Test method,
14 Output voltage asymmetry determination test
14.1 Test purpose
Test method
15 Output voltage characteristic test
15.1 Test purpose,
15.2 Test method
16 Output voltage waveform distortion rate determination test16.1 Test purpose,| |tt||16.2 Test method,
Voltage regulation time measurement test
JB/T7070.1—2002
JB/T7070.1—2002
17.1 Test purpose
17.2 Test method
18 Maximum voltage drop measurement test
18.1 Test purpose
18.2 Test method
19 Brush spark measurement test
19.1 Test purpose,
19. 2 Test methods,
20 Voltage stabilization accuracy test
20.1 Test purpose
20.2 Test method.
21 Braking performance test
21.1 Test purpose
21.2 Test method
22 Reaction time determination test
22.1 Test purpose
22.2 Test method
23 Running stability test
23.1 Test purpose
23.2 Test method|| tt||24 Temperature rise test.
24.1 Test purpose.
24.2 Test method..
25 Overload capacity test
25.1 Test purpose,
25.2 Test method.
26 Sound level measurement test
26.1 Test purpose.
Test method,
Life test
Test purpose.
Test method,
Wiring method for insulation resistance measurement test
Power frequency withstand voltage test circuit
Inductive withstand voltage test circuit.
No-load output voltage range measurement test circuitNo-load current measurement test circuit,
No-load loss measurement test circuit..
Load test circuit (1)
Load test circuit (2)
Output voltage asymmetry measurement test circuitOutput voltage characteristic test circuit,
Maximum voltage drop measurement test circuit
Figure 12 Brush spark measurement test circuit
Figure 13 Voltage regulation accuracy Determination test circuit
Figure 14 Overload capacity test circuit...
Table 1 Test items and test procedures
JB/T7070.12002
JB/T7070.1-2002
JB/T7070 "Guidelines for voltage regulator test" is issued in parts and is intended to be divided into 3 parts: - Part 1: Test guidelines for contact voltage regulators and contact automatic voltage regulators: - Part 2: Test guidelines for induction voltage regulators and induction automatic voltage regulators: - Part 3: Test guidelines for magnetic voltage regulators. This part is the first part of JB/T7070.
This part is a revision of JB/T7070.1-1993 "Guidelines for voltage regulator test Part 1 Test guidelines for contact and contact automatic voltage regulators".
Compared with JB/T7070.11993, the main changes of this part are as follows: The writing format of this part complies with GB/T1.1-2000 "Guidelines for Standardization Work Part 1: Structure and Writing Rules of Standards"; Test methods for operating mechanism, sound level measurement, voltage stabilization accuracy, braking performance, voltage regulation time, reaction time and running stability are added:
The temperature rise test method is changed to the provisions of JB/T8749: - The original standard life test method of "the brush rotates back and forth 10,000 times at a speed of 0.125r/s in the entire voltage regulation range" is changed to "the brush rotates 10,000m at a speed of 0.125r/s within the setting range" to make it more reasonable; general appearance inspection stipulates specific inspection contents. This part replaces JB/T7070.1-1993. This part is proposed by the China Machinery Industry Federation. This part is under the jurisdiction of the National Technical Committee for Transformer Standardization. This part was drafted by: Shenyang Transformer Research Institute, Shanghai Voltage Regulator Factory, Shanghai Senpu Electric Research Institute, Boshan Voltage Regulator Factory. The main drafters of this part are: Huang Peina, Xu Kaiping, Song Xiping. This part was first issued in 1993, and this is the first revision. I
1 Scope
Guidelines for testing voltage regulators
JB/T7070.1--2002
Part 1: Guidelines for testing contact voltage regulators and contact automatic voltage regulators
This part specifies the test methods and test procedures for routine tests, type tests and special tests of contact voltage regulators and contact automatic voltage regulators. This part is applicable to dry self-cooling contact voltage regulators (hereinafter referred to as voltage regulators) and contact automatic voltage regulators (hereinafter referred to as automatic voltage regulators) with a voltage level of 500V and below, a rated frequency of 50Hz, continuous operation, and stepless adjustment. 2 Normative references
The clauses in the following documents become the clauses of this part through reference in this part of JB/T 7070. For all dated references, all subsequent amendments (excluding errata) or revisions are not applicable to this part. However, parties to agreements based on this part are encouraged to study whether the latest versions of these documents can be used. For all undated references, the latest versions are applicable to this part. GB/T19001-1994 Quality system design, development, production, installation and service quality assurance model (idtISO9001:1994)
JB/T8749-1998 General technical requirements for voltage regulators JB/T10089-2001
Contact automatic voltage regulator
JB/T10091-2001 Contact voltage regulator
3 Terms and definitions
The terms and definitions established in JB/T8749, JB/T10089 and JB/T10091 apply to this standard. 4 General requirements for tests
4.1 The test should be carried out at any ambient temperature between 10℃ and 40℃. 4.2 The relative humidity is below 90%.
4.3 There is no significant difference between the temperature of the test piece and the ambient temperature. 4.4 The test site should have separate working grounding and protective grounding. 4.5 Unless otherwise agreed between the manufacturer and the user, all tests shall be conducted at the manufacturer. 4.6 During the test, all external components and devices that may affect the operation of the voltage regulator or automatic voltage regulator shall be installed in the specified position. 4.71
Except for the insulation test, all performance tests shall be based on the rated conditions (unless otherwise specified). 4.8 The test measurement system shall ensure accuracy in accordance with the requirements of GB/T19001. 4.9 There shall be no gas or medium that seriously affects the insulation of the voltage regulator (automatic voltage regulator) at the test site. 4.10 There shall be no severe vibration at the test site.
4.11 When the test measurement data needs to be corrected to the reference temperature, the reference temperature of the voltage regulator (automatic voltage regulator) shall be 20K higher than the winding temperature rise limit under the corresponding insulation heat resistance grade. 4.12 The voltage regulator (automatic voltage regulator) that needs to be type tested can be randomly selected from the batch of products, and the number of units selected is generally not less than 2. After the test, if one unit fails in one item, it should be returned for retesting. If the retest still fails, the batch of products is considered unqualified and can only be produced after the defects are eliminated and the test is qualified.
4.13 The test shall use electrical measuring instruments and meters with an accuracy of not less than 0.5 (except insulation resistance meter, point thermometer, and 5V range low voltage meter). JB/T7070.1—2002
Test items and test procedures
Tests are divided into routine tests, type tests and special tests. Routine tests should be carried out on each product before it leaves the factory; type tests should be carried out on new products or when there are major changes in the structure, process or materials of the product; special tests should be carried out to verify the special performance of the product or when the user makes requirements in the agreement. Products that require type tests and special tests must first undergo routine tests. The test items and test procedures for routine tests, type tests and special tests are shown in Table 1. Table 1 Test items and test procedures
Test items
General (appearance) inspection
Winding resistance measurement test
Power frequency withstand voltage test
Induction withstand voltage test
Actuating mechanism (control mode and operating mechanism) test
Air cutting test
Load test
Output voltage asymmetry measurement test
Output voltage characteristic test
Output voltage waveform distortion rate measurement test
Voltage regulation time measurement test
Maximum voltage drop measurement test
Brush spark measurement test
Voltage regulation accuracy measurement test
Braking performance test
Reaction time measurement
Operation stability test
Temperature rise test
Overload capacity test
Sound level measurement test
Life test
General inspection
Inspection purpose
Inspect the appearance of the test piece for obvious defects. Inspection method
Voltage regulator
Routine test
Routine test
Routine test
Type test
Routine test
Routine test
Routine test
Type test
Type test
Type test
Type test
Type test
Special test
Special test
Test type
Automatic voltage regulator
Routine test
Routine test
Example Tests
Type test
Routine test
Routine test
Routine test
Routine test
Type test
Routine test
Routine test
Type test
Routine test
Type test
Special test
Special test
Special test
For products with unit capacity below 5kV
, a comprehensive inspection of the raw materials, parts, and external components of the test product can be carried out in advance, and their performance should meet the requirements of the corresponding standards or technical conditions. A comprehensive inspection of the entire machine and accessories of the test product should be carried out, and the lead wires and terminals, grounding terminals, shell protection level, surface quality, etc. of the test product should be correct and intact, and meet the requirements of its own quality and the matching of the entire machine. 2
Winding resistance measurement test
7.1 Test purpose
JB/T7070.1—2002
Check whether the wire specifications and process used in the coil meet the requirements; check the quality of wire welding; record the DC resistance of the winding to facilitate the calculation of electrical performance.
7.2 Test method
7.2.1 When measuring resistance, the ambient temperature during measurement should be recorded, and the thermometer should be placed parallel to the measured winding at a distance of 1m. 7.2.2 The winding resistance is measured by the bridge method. When the measured resistance is 11α or less, a double-arm bridge is used for measurement. When the measured resistance is above 11Q, a single-arm bridge is used for measurement.
7.2.3 When measuring the resistance of a winding with a large inductance, the power switch should be turned on first, the circuit resistance should be estimated, and the galvanometer should be installed after it stabilizes to ensure accurate measurement. The galvanometer should be disconnected before the power is disconnected to prevent the back electromotive force from damaging the galvanometer and the bridge. 7.2.4 When measuring resistance, its contact resistance should be minimized as much as possible, that is, the resistance of the connecting wire used for measurement should be reduced. 7.2.5 In order to have a comparative value, the measured resistance is converted to the resistance value at 75℃. 8 Power frequency withstand voltage test
8.1 Test purpose
To assess the withstand voltage strength of the main insulation of the test product and the control system under power frequency voltage. Before the test product is subjected to power frequency withstand voltage, the insulation resistance must be measured. Only after it meets the relevant standards can the power frequency withstand voltage test be carried out. The insulation resistance is only used as a reference during power frequency withstand voltage and is not assessed. 8.2 Test method
8.2.1 Insulation resistance measurement method:
The test position is the part of the winding to the shell and the part to the ground that the human body may contact. a)
The reference value of the insulation resistance measurement should not be less than 10MQ. b)
The wiring method of the test is shown in a) and b of Figure 1). Use an insulation resistance meter with a 500V indication limit of not less than 500MQ. Rotate the insulation resistance meter evenly, and the speed shall be in accordance with the instrument manual.
The judgment of whether the insulation resistance is qualified shall be in accordance with JB/T10089 or JB/T10091. Insulation resistance meter
a) Single phase
Insulation resistance meter
b) Three phase
Figure 1 Wiring method for insulation resistance measurement test JB/T7070.1—2002www.bzxz.net
8.2.2 The power frequency withstand voltage test circuit is shown in Figure 2. Figure 2 Power frequency withstand voltage test circuit
8.2.3 The shell of the test piece and the parts related to safety shall be reliably grounded. 8.2.4 The test shall be conducted with a single-phase AC voltage of any appropriate frequency not less than 80% of the rated frequency (preferably between 45Hz and 50Hz), with a waveform as close to a sine wave as possible (the two half-waves are exactly the same, and the ratio of the peak value to the RMS value is equal to V2 ± 0.7%, or the RMS value of each harmonic is less than 5% of the RMS value of the fundamental wave). 8.2.5 The capacity of the power frequency high-voltage test transformer shall not be less than 0.5kVA per kilovolt. 8.2.6 The test voltage shall be the peak value of the measured voltage divided by V2 (i.e. the RMS value). 8.2.7 The test shall start from no more than 1/3 of the specified test voltage, and shall be coordinated with the measurement and added to the specified test voltage as soon as possible. After the test time is reached, the voltage shall be quickly reduced to less than 1/3 of the specified test voltage, and then the power supply shall be cut off. 8.2.8 The specified test voltage value should be applied between the tested winding and the grounding terminal (before the test, all terminals of other windings and the core, clamps, etc. should be connected together and grounded) for 60s. 8.2.9 Carefully observe the indicating instruments and test equipment. If the voltmeter pointer suddenly drops, the ammeter pointer suddenly rises, and intermittent corona sounds can be heard, it means that the insulation has been broken down. The power supply should be cut off immediately: if the test current is stable and the test voltage does not drop suddenly, the test is qualified.
8.2.10 For automatic voltage regulators, the printed circuit board with electronic components should be removed. 9 Inductive withstand voltage test
9.1 Test purpose
The inductive withstand voltage test (frequency double voltage test) is to assess the electrical strength of the insulation between turns, layers, sections and phases of the voltage regulator. 9.2 Test method
9.2.1 Usually, twice the rated input AC voltage with twice the frequency is applied to the input end of the voltage regulator (automatic voltage regulator). Its waveform should be as close to a sine wave as possible, and its brush and winding contact surface are separated by an insulating plate (thickness not less than 0.5mm). 9.2.2 See Figure 3 for the test circuit.
100Hz3
Figure 3 Induction withstand voltage test circuit
9.2.3 The test voltage should be the peak value of the measured voltage divided by 2 (i.e. the root mean square value) dx
9.2.4 The test should start from no more than 1/3 of the specified test voltage, and should be coordinated with the measurement and added to the specified test voltage as soon as possible. After the test time is reached, the voltage should be quickly reduced to less than 1/3 of the specified test voltage, and then the power supply should be cut off. 9.2.5 When the frequency of the test voltage is equal to or close to 2 times the rated frequency, the time for applying the specified test voltage should be 60s. When the frequency of the test voltage exceeds 2 times the rated frequency, the test time T shall be 4
but not less than 15s.
9.2.6 During the test, there shall be no abnormal phenomena such as sudden increase of current, smoke between turns, partial burning of windings, etc. 10 Repeated insulation test
JB/T7070.1—2002
When the voltage regulator (automatic voltage regulator) is subjected to repeated insulation test after leaving the factory, the test voltage shall be reduced to 85% of the original value (unless otherwise agreed), but it must be conditioned that the insulation has not changed during this period. The test method shall be in accordance with the provisions of Chapter 8 and Chapter 9 of this standard. 11 Operating mechanism (control method and operating mechanism) test 11.1 Test purpose
Verify whether the performance of the manual, electric and automatic adjustment parts of the test product is good. 11.2 Test method
When the voltage regulator is not powered on, through manual back and forth adjustment, the transmission mechanism should rotate flexibly and evenly. When adjusted to the extreme position, the limit switch should be able to operate accurately.
When the voltage regulator is in no-load operation, the voltage regulator should be able to increase or decrease the voltage in the direction indicated on the label through electric adjustment. When the voltage rises to the maximum value or drops to the minimum value, the limit switch should be able to immediately cut off the power supply of the servo motor. Make the automatic voltage regulator in no-load, stable voltage operation state. When the input voltage increases or decreases within the specified range, the output voltage should be able to automatically adjust to the rated value of the stable voltage accuracy range. 12 No-load test
12.1 Test purpose
Measure the output voltage range, no-load current, no-load loss and loss variation, and verify whether they meet the standard requirements. 12.2 Test method
Usually, unit measurement is adopted. The output end of the voltage regulator (automatic voltage regulator) is open, and the rated input voltage of the rated frequency is applied to the input end. 12.2.1 Output voltage range measurement test
Perform according to the test circuit in Figure 4. It is allowed to short-circuit the current coil of the ammeter and power meter. Figure 4 No-load output voltage range measurement test circuit 12.2.2 No-load current measurement test
Perform according to the test circuits in Figures 5 and 6.
Figure 5 No-load current measurement test circuit
JB/T7070.1—2002
12.2.3 No-load loss measurement test
Perform according to the test circuits in Figures 5 and 6
12.2.4 No-load loss variation measurement test Figure 6 No-load loss measurement test circuit
Perform according to the test circuits in Figures 5 and 6. Slide (roll) the test brush back and forth once in the entire voltage regulation range at a speed of 0.125r/s (tolerance ±30%), read the maximum no-load loss value and the minimum no-load loss value, and the difference is the loss variation. 13 Load test
13.1 Test purpose
Measure the load loss of the test product to verify whether it meets the requirements of the relevant standards. 13.2 Test method
13.2.1 Adjust the brush position of the voltage regulator to 2 rated voltage (the automatic voltage regulator is adjusted to 90% of the rated voltage), short-circuit the output end, connect an adjustable power supply to the input end, adjust it to the rated current at the output end, and measure the load loss. 13.2.2 See Figures 7 and 8 for the test circuit.
Load test circuit (1)
3 Load test circuit (2)
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