NB/T 10286-2019Single-phase AC parameter voltage stabilizer (English PDF)

3.1 AC parameter regulator

An appliance that uses ferromagnetic resonance and uses the magnetic saturation characteristics of the resonance iron core to achieve a stable voltage.

3.2 Peak interference

Interference with a pulse width of microseconds and a peak value exceeding kilovolts.

3.3 Normal mode noise

Generated between the phase line and the neutral line inside the power grid, it has a wide frequency band, superimposed on the sine and transmitted along the transmission line. sound.

3.4 Fatal defect

Defects that can cause danger or unsafety to people who use, repair, or keep the product, and have a fatal impact on the basic functions of the product.

3.5 Serious defect

A defect that does not constitute a fatal defect, but can cause a malfunction or seriously reduce the performance of the product.

3.6 Minor defect

A defect that does not constitute a fatal or serious defect, but has a slight or almost no effect on the performance of the product.

5.1 Working conditions

Working conditions. divided into reference conditions, rated conditions and limit conditions. Their meaning and scope of application should conform to JB/T 9299-1999 Relevant explanations and regulations in 4.1.1.

5.2 Reference conditions and rated conditions

5.3 Performance characteristics

Performance characteristics are shown in Table 2.

Performance characteristics are divided into main performance characteristics and non-main performance characteristics according to the requirements of GB/T 6587-2012. This standard is based on IEC 60686 For the distinction of performance, in Table 2, the main performance characteristics are marked with a "*" symbol.

5.4 Environmental test requirements

The voltage stabilizer should be selected according to the requirements of GB/T 6587-2012 and the appropriate use conditions and transportation test level, and can pass GB/T 6587 -Requirements for temperature test, humidity test, vibration test, shock test and transportation test specified in 2012.

In the above tests, the inspection of the performance characteristics of the voltage stabilizer can be limited to the insulation resistance, the relative harmonic content, and the accuracy of the stable output voltage.

5.5 Reliability requirements

The reliability index of the power supply is expressed by the mean time between failures MTBF (m1), and m1 is not less than 30 000 h.

5.6 Appearance requirements

5.6.1 The power cord should be double-insulated, and the lead-out point of the power cord should have an insulating protective cover. The power cord should be connected so that its contacts are free from tension, The sheath is protected from wear. The yellow/green two-color protective core wire in the power cord should be correctly connected to the protective ground terminal, and should not be used for other purposes. Yellow/green color The connection of the protective grounding core wire should be such that when the power cord is accidentally broken, the break of the live core wire is before the protective grounding core wire. The power cord should not be exposed Copper, fracture phenomenon.

5.6.2 The power plug (seat) should meet the relevant regulations of GB/T 1002 and GB/T 2099.1.

5.6.3 The power switch should be able to operate normally and have sufficient breaking capacity.

5.6.4 The voltmeter and ammeter should be correctly indicated.

5.6.5 The paint surface film must be flat and smooth, with uniform color and firm paint layer. The main surface has no obvious defects such as paint flow, wrinkles and peeling, The plating layer of the electroplated parts should be smooth and dense, uniform in color, and free of spots, pinholes, bubbles, and peeling.

5.6.6 The product nameplate, logo and accompanying accessories and technical documents must be complete (see 8.1 and 8.2).

6.1 General requirements

According to the provisions of 6.1 of JB/T 9299-1999.

6.2 Inrush current

According to the provisions of 6.2 of JB/T 9299-1999.

6.3 Rated source current

According to the provisions of JB/T 9299-1999, 6.3.

6.4 Efficiency

According to the provisions of 6.4 in JB/T 9299-1999.

6.5 Source power factor

According to the provisions of JB/T 9299-1999, 6.5. This standard only takes the test results when fully loaded.

6.6 Relative harmonic content of source current

According to the provisions of 6.6 in JB/T 9299-1999. This standard only takes the test results when fully loaded.

6.7 No-load input power

According to the provisions of 6.7 of JB/T 9299-1999.

6.8 Stable output voltage accuracy

Refer to the test wiring method in 6.9 of JB/T 9299-199, and test according to the requirements of items 7 and 8 in the test list of appendix A, and the test results The difference between the output voltage and 220 V is compared with 220 V, which is the percentage of the stable output voltage accuracy.

6.9 Source frequency effect

According to the provisions of 6.10 in JB/T 9299-1999.

6.10 Temperature effect

According to the provisions of 6.11 in JB/T 9299-1999.

6.11 Random deviation

According to the provisions of 6.11.3.4 in JB/T 9299-1999.

6.12 Tolerance

Do not test separately.

The output voltage values obtained in the tests specified in this chapter should all fall within the tolerance band.

a) Stable output voltage accuracy (see 6.8);

b) Source frequency effect (see 6.9);

c) Temperature effect (see 6.10);

d) Random deviation (see 6.11);

e) Warm-up time (see 6.18);

f) The steady-state value of the output voltage obtained in the maximum overshoot amplitude test (see 6.14) should all fall within the tolerance band.

6.13 Relative harmonic content

According to the provisions of 6.14 in JB/T 9299-1999.

6.14 Maximum upshoot amplitude (marked in the form of effective value)

According to the provisions of 6.15 in JB/T 9299-1999.

6.15 Total recovery time

According to the provisions of 6.16 in JB/T 9299-1999.

6.16 Connect and pass

According to the provisions of 6.17 in JB/T 9299-1999.

6.17 Turn-on total recovery time

According to the provisions of 6.18 in JB/T 9299-1999.

6.18 Warm-up time

According to the provisions of 6.19 in JB/T 9299-1999.

6.19 Indication error

According to the provisions of 6.22 in JB/T 9299-1999.

6.20 Input terminal to frame capacitance

According to the provisions of 6.23 in JB/T 9299-1999. This standard only specifies the capacitance of the input terminal to the frame.

6.21 Audio noise

Audio noise is carried out in a standard anechoic room according to the regulations of SJ 2488-1984. Measure front, back, left, right, top at 1 m from the sample surface The sound level of the unit, the measurement result should be the average of the corrected sound level values in 5 directions. Do it once for empty and full load, and take the maximum value as the test The results of the test.

6.22 Isolation voltage

According to the provisions of 6.25 in JB/T 9299-1999. This standard specifies that the test voltage is applied between the input terminal and the output terminal.

During the period, the test voltage is 900 V, slowly applied from zero to the specified value for 1 min, there should be no flashover and breakdown.

6.23 Insulation resistance, insulation test voltage, leakage current

Do 3 basic safety tests according to GB/T 6587-2012. This standard stipulates that the tidal insulation resistance is >=2 Mohm, and the tidal insulation test voltage is 1 250 V, 1 min.

6.24 Spike suppression

Wire as shown in Figure 1. In order to protect the measuring instrument, if the capacity is above 5 kVA, it is specified that the sample only carries a 3 kW resistive load. Close K1 and K2.

Adjust B1 to make V1=200 V, and set the spike generator to 2 kVpp/2.5 µS/180°/44 ohm output. Read the output of the tested sample from the memory oscilloscope The peak value of the end spike signal.

6.25 Normal mode noise rejection ratio test

Connect according to Figure 2, close K1K2, adjust B1 to make V1=220 V, and continuously change the output frequency of the function generator every octave from 10 kHZ to 2 MHZ Record the readings of the CB1 and CB2 field strength meters respectively. After the test, calculate the normal mode noise rejection ratio NMRR value according to formula (1).

6.26 Overload capacity

In addition to the load, other quantities are the reference conditions, that is, the tolerance G0 increases the load, that is, adjust RL to make the output current equal to 1.2 of the rated output current (If it exceeds the range of the ammeter, a current transformer needs to be connected). After 20 minutes, there is no smoke or burning smell from the tested regulator.

6.27 Output short circuit protection characteristics

When the input voltage of the tested regulator is 220 V, add a standard rated resistance load, and measure the rated input current I1 at this time. followed by The load is short-circuited, keep the input voltage at 220 V, and then measure the input current I1 at this time to be short. Substitute the data into the formula I1 short/I1 and calculate its result As a result, it should be I1 short/I1< 2.5. After the short circuit is disconnected, the regulator can automatically resume normal operation. When testing, if the range of the ammeter is limited, add Connect the current transformer.

6.28 Environmental test

6.28.1 In the environmental grouping, the series of parameter regulators are group II instruments and level 2 flow conditions.

6.28.2 The parameter regulator specified in this standard shall be subjected to temperature test in accordance with 5.9.1 of GB/T 6587-2012.

6.28.3 The parameter regulator specified in this standard shall be subjected to humidity test in accordance with 5.9.2 of GB/T 6587-2012.

6.28.4 The parameter stabilizer specified in this standard shall be subjected to vibration test in accordance with 5.9.3 of GB/T 6587-2012.

6.28.5 The parameter regulator specified in this standard shall be subjected to an impact test in accordance with the provisions of 5.9.4 in GB/T 6587-2012.

6.28.6 The parameter stabilizer specified in this standard shall be tested for transportation according to the level 2 circulation conditions specified in 5.10 of GB/T 6587-2012.

6.28.7 The test items during temperature test and humidity test are as follows. […]

6.29 Reliability test

6.29.1 This test shall be carried out in accordance with the provisions of GB/T 11463-1989, with a fixed-time fixed number tail test plan selected. Lower limit of MTBF assumption Value = 30 000 h. The optimal number of samples randomly selected for reliability test meets the requirements of Table 11 in GB/T 11463-1989.

6.29.2 Reliability test shall be conducted every 2 years. Reliability qualification test shall be conducted for the capacity below 1 kVA, and the reliability test shall be conducted for the capacity greater than 1 kVA.

Reliability field test. The serialized products of the same principle, the same process, and different specifications are allowed to select only 1 to 2 specifications as representative to be reliable Sex test.

6.30 Visual inspection

The visual inspection shall be carried out according to the following requirements without power supply.

a) The power cord should be double insulated. The lead out of the power cord should have an insulating protective cover. The connection of the power cord should protect the contact point from tension, The sheath is protected from wear. The yellow/green two-color protective grounding core wire in the power cord should be correctly connected to the protective grounding terminal, and nothing else is allowed use. The yellow/green two-color protective grounding core wire should be connected so that when the power cord is accidentally broken, the break of the charged core wire is before the protective core wire.

The power cord should not be exposed to copper or broken.

b) The power plug (seat) must comply with the relevant regulations of GB/T 1002 and GB/T 2099.1.

c) Check whether the action of the power switch is normal and whether it has sufficient breaking capacity.

d) Check whether the indication of the voltmeter and ammeter is correct.

e) Check whether the paint surface film and the plating layer of electroplated parts meet the requirements of 5.6.5.

f) Check whether the product nameplate, logo and accompanying accessories and technical documents are complete (see 8.1 and 8.2).

7.1 Inspection classification

Product inspection is divided into factory inspection (or routine test), type test and unpacking inspection.

7.2 Factory inspection

The factory inspection is carried out by the quality inspection department of the manufacturer for each product produced one by one, and the ordering party has the right to send personnel to participate in the factory inspection. test The instruments, meters and equipment used shall be within the verification period of the measuring instruments.

7.3 Type test

In one of the following cases, type test should be carried out.

a) At the time of finalization and appraisal of newly designed products;

b) During normal production, at least once a year;

c) When the production is stopped for a long time and is put into production again;

d) There are major changes in the design structure, production process, equipment, main components and raw materials, and production sites, which may affect product performance Time;

e) When the national quality supervision agency puts forward a requirement for type testing.

7.4 Unpacking inspection

Performed during product creation and superior inspection

7.5 Inspection items

The inspection items are shown in Table 3.

7.6 Defect classification

Defect classification is shown in Table 4.

7.8 Judgment rules

7.8.1 Batch quality notation

7.8.1.2 Number of product defects per hundred units

7.8.1.1 The number of unqualified products per 100 units

7.8.2 Judgment rules for factory inspection

The number of unqualified products per hundred units shall not exceed 5, and the number of defects per hundred units shall not exceed 20.Fatal defects are not allowed. Be If the batch is judged as qualified, the unqualified products in the batch will be eliminated, repaired into qualified products, and the whole batch will be accepted. For batches judged as non-conforming products, the whole batch will be returned Go back to the production unit, find out the reason, rework everything, and re-inspect.

7.8.3 Judgment rules for type inspection

7.8.3.1 Type inspection (not including reliability test)

During the inspection process (not including reliability inspection), a maximum of 3 defects are allowed, but fatal defects are not allowed.

Is unqualified. After the defect occurs, repair is allowed. If the same defect occurs repeatedly after repair, the type inspection shall be judged as unqualified.

When the type inspection is unqualified, all products shall be fully analyzed, and measures shall be taken to re-sample samples for the second Sub-type test. If the second type test is still judged as unqualified, the production shall be stopped and the factory inspection and type test shall be conducted.

Special research and analysis of grid items, after taking improvement measures, re-examination and inspection of unqualified items can resume production, factory inspection and type test Test.

Products that have undergone type testing should be replaced with components that may affect their performance, and can only be allowed to leave the factory after passing the inspection.

7.8.3.2 Reliability test

According to 6.29 and GB/T 11463-1989 regulations.

The samples that have undergone reliability testing should be replaced with components that are at the end of their life and (or) close to the end, and only after they pass the inspection Factory as qualified products.

7.8.4 Unpacking inspection judgment rules

The number of product defects per hundred units shall not be greater than 20, and fatal defects are not allowed.

8.1 Logo

8.1.1 The product should have a nameplate and be firmly installed in an obvious location. The type and size of the nameplate should meet the requirements of GB/T 13306. Inside the nameplate The content includes at least the following items.

a) The name of the manufacturer (can also be marked on the regulator panel);

b) Product name, model specification;

c) Factory number and date;

d) Output specifications. output voltage, current, capacity, frequency, phase number;

e) Input specifications. input voltage range, frequency, phase number;

f) Each input and output terminal should be marked with "phase wire", "neutral wire" and "ground wire";

g) Environmental adaptation group.

8.1.2 The packaging mark shall be implemented in accordance with the relevant regulations of GB/T 191. The following contents should be clearly marked outside the packing box.

a) Product name, model specification;

b) The number of products;

c) Gross weight of the packing box (kg);

d) Packing box size. length×width×height (mm);

e) The name of the manufacturer;

f) Date of manufacture;

g) It should be marked with precautions. such as "precision instrument", "handle with care", "do not invert", "upward", "moisture-proof", etc., Or the corresponding icon sign.

8.2 Packaging

The packaging requirements of the voltage stabilizer should meet the requirements of GB/T 13384. The following documents should be included in the packing box. -1 copy of packing list (including product accessories list); -1 copy of the certificate;

--1 copy of instruction manual.

8.3 Transportation and storage

The transportation and storage requirements of the voltage stabilizer should meet the requirements of JB/T 9329.