This standard specifies the type and size, technical requirements, test methods, inspection rules, packaging and marking of wall bushings for electrostatic precipitators (hereinafter referred to as bushings). This standard is applicable to bushings for electrostatic precipitators with rated DC voltages of 72, 80, 100KV and operating temperatures not exceeding 250°C, and the installation site is not more than 1000m above sea level. JB/T 5909.4-1991 Porcelain insulator wall bushings for electrostatic precipitators JB/T5909.4-1991 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
Porcelain Insulators for Electrostatic Precipitators
Wall Bushings
Subject Content and Scope of Application
JB/T5909.4—91
This standard specifies the type and size, technical requirements, test methods, inspection rules, packaging and marking of wall bushings for electrostatic precipitators (hereinafter referred to as bushings).
This standard applies to bushings for electrostatic precipitators with rated DC voltages of 72, 80, and 100 kV and operating temperatures not exceeding 250°C, and the installation site is not more than 1000 m above sea level.
Reference standards
GB775.1~775.3
JB3384
JB/Z94wwW.bzxz.Net
3 Types and dimensions
Technical conditions for high-voltage insulator porcelain parts
Test methods for insulators
Electrical terminology insulators
Sampling methods for high-voltage insulators
Insulator product packaging
3.1 The bushing shall be manufactured according to the drawings approved by the prescribed procedures. Its type and main dimensions shall comply with the provisions of Figure 1, Figure 2 and Table 1. Figure 1
Approved by the Ministry of Machinery and Electronics Industry on December 25, 1991, 14
Implemented on October 1, 1992
JT-07201C
JT-08001C
JT-10001C
The bushing model is indicated as follows:
4 Technical requirements
JB/T5909.491
Table 1 Main dimensions of bushing
Code for working temperature of 250℃
Product design serial number: Use two Arabic numerals to indicate the rated DC voltage, kV
Bushing for electrostatic precipitator
4.1 The appearance quality of the bushing shall comply with the corresponding provisions of GB772. 4.2 The power frequency breakdown voltage of the bushing wall thickness shall not be lower than the corresponding provisions of GB772. d
6—,10
4.3 The profile of the casing should be homogeneous and dense, and there should be no penetration after the porosity test. The pressure during the porosity test should be no less than 20MPa, and the product of pressure and time should be no less than 180MPa·h. 4.4 The casing should be able to withstand three rapid temperature changes without damage, and its test temperature difference should comply with the relevant provisions of GB772. 4.5 The casing should be glued with special high-temperature resistant adhesives, and the exposed surface of the accessories should have a protective layer. 4.6 The casing should be able to withstand a 5-minute power frequency spark voltage test without breakdown, damage or abnormal heating. Its test voltage value should comply with the relevant provisions of GB772.
4.7 The casing temperature voltage tolerance test, the casing is not damaged during the test, and the test temperature and voltage are shown in Table 2. When the power AC voltage is used instead of the DC voltage for the test, the voltage value should be equivalent. Table 2 Bushing test degree and voltage
Rated DC voltage
DC test voltage at room temperature
DC test voltage at 250℃
5 Test method
5.1 Power frequency spark voltage test
JB/T5909.491
The power frequency spark voltage test of bushing shall be carried out in accordance with the provisions of GB775.2. 5.2 Temperature cycle test
The temperature cycle test of bushing shall be carried out in accordance with the provisions of GB775.1. 5.3 Porosity test
The porosity test of bushing shall be carried out in accordance with the provisions of GB775.1. 5.4 Power frequency breakdown voltage test of wall thickness
The power frequency breakdown voltage test of bushing wall thickness shall be carried out in accordance with the provisions of GB775.2. 5.5 Temperature and voltage withstand test
Install the clean sample on a test machine with a thermostat, and apply voltage to the conductive rod of the sample. During the flange grounding test, the thermostat power supply should be turned on. When the test temperature in the box reaches the standard value, keep the temperature constant for 40 minutes, turn off the thermostat power supply, and then apply voltage to the standard value for 1 minute. The bushing should not flash over. 6 Inspection rules
6.1 The bushing shall be inspected and accepted by the technical inspection department of the manufacturer. The manufacturer shall ensure that all delivered bushings meet the requirements of this standard. 6.2 According to the inspection rules specified in this standard, the user has the right to inspect whether the quality and indicators of the bushing meet the requirements of this standard. 6.3 The bushing shall be inspected and accepted by batch. The bushings of the same model made by the same process method shall be counted as one batch, and the quantity of each batch shall not exceed 100.
6.4 The inspection of the bushing is divided into individual inspection, sampling inspection and type test. 6.4.1 Inspection one by one
Inspection one by one shall be carried out in accordance with the provisions of Table 3. If any of the requirements specified in Table 3 are not met, the bushing is unqualifiedTable 3 Inspection content one by one
Inspection item number
6.4.2 Sampling inspection
Inspection item name
Appearance inspection
Dimension inspection
Work amountSpark voltage test
Inspection requirements
Article 4.1 of this standard
Article 3.1 of this standard
Article 4.6 of this standard
Inspection method
Article 5.1 of this standard
Sampling inspectionAfter passing the inspection one by one, randomly select 2 specimens and conduct the inspection in accordance with the provisions of Table 4. The piece-rate secondary sampling plan is adopted. The sampling rules and judgment procedures shall comply with the provisions of JB3384. Table 4
Sampling inspection items
Inspection item number
Inspection item name
Temperature cycle test
Porosity test
Inspection requirements
Article 4.4 of this standard
Article 4.3 of this standard
Number of samples
Porcelain after the first inspection
One piece for each sample
Inspection method
Article 5.2 of this standard
Article 5.3 of this standard
If one sample does not meet any of the requirements specified in Table 4 during the inspection, double the number of samples should be drawn from the same batch of products for re-inspection. If there is still one sample that does not meet any of the requirements in Table 4, the batch of porcelain bushings is unqualified. 16
6.4.3 Type test
JB/T5909.4-91
When a new product is finalized or the product structure is modified, or the raw material formula and process method are changed, a type test must be carried out. The number of specimens for the type test shall not be less than 4, and the test shall be carried out according to the provisions of Table 5 after each test is qualified. Table 5 Type test content
Test item serial number
Test item name
Temperature cycle test
Temperature voltage withstand test
Wall thickness Power frequency breakdown voltage
Porosity test
Test requirements
Article 4.4 of this standard
Article 4.7 of this standard
Article 4.2 of this standard
Article 4.3 of this standard
Number of specimens
After the 2nd to 3rd tests
of the porcelain blocks, take one
for each specimen. When performing the type test, if one does not meet any of the requirements in Table 5, the type test shall fail. 7
Packaging and marking
Test method
Article 5.2 of this standard
Article 5.5 of this standard
Article 5.4 of this standard
Article 5.3 of this standard
7.1 The casing should be packed in wooden boxes and ensure that it will not be damaged due to poor packaging during transportation. Its packaging should comply with the provisions of JB/Z94. The packaging box should be marked with:
Manufacturer name;
Casing model:
Number of casings;
Total weight of the packaging box;
e. "Handle with care", "Porcelain parts" and other words or indication marks. 7.2 The casing porcelain parts should have clear and firm manufacturer's trademarks and manufacturing years. 7.3 Each batch of delivered bushings shall be accompanied by a product certificate, which shall have the seal of the manufacturer's technical inspection department and additional instructions:
This standard was proposed and managed by Zhuji Electrostatic Precipitator Research Institute. This standard was drafted by Jiujiang Electric Porcelain Factory. The main drafters of this standard were Qiu Yunchi and Zhang Hua. 17
People's Republic of China
Mechanical Industry Standard
Porcelain Insulator for Electrostatic Precipitator
JB/T5909.1~5909.4~-91
Published and distributed by the Mechanical Standardization Research Institute of the Ministry of Machinery and Electronics Industry (P.O. Box 8144, Beijing 100081)
Copyright reserved
Reproduction prohibited
Printed by Printing Factory, Qinghe County, Hebei Province
Format 880×1230
First edition in February 1992
Sheet 1
Word count 34000
First printing in February 1992
Print number 00.001~1000
Price 2.40 yuan
No. 0499
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