GB 13398-1992 General technical conditions for insulating rods for live work
Some standard content:
National Standard of the People's Republic of China
General technich conditions of Insulating poles for liveworking GB13398-92
This standard adopts the international standard IEC855 (1985) "Foam-filled insulation for live working" Tubes and solid insulating rods. 1 Subject content and scope of application
This standard specifies the classification, technical requirements, test methods and inspection rules of insulating rods for live work (hereinafter referred to as insulating rods). This standard applies to edge poles used for live work on 10~500kV AC high-voltage electrical equipment in areas with an altitude of 1000m and below.
The insulating rod in this standard refers to an operating rod made of insulating materials such as hollow insulating tubes, foam-filled insulating tubes, and epoxy insulating laminates (hereinafter referred to as hollow tubes, filled tubes, and insulating plates respectively). Support rods and pull (suspended) rods. For insulating poles intended to be used at altitudes higher than 1000m but not exceeding 4000m, the test voltage shall be corrected according to the test voltage specified in this standard multiplied by the altitude correction coefficient K, and the shortest effective insulation length shall be in accordance with this standard The specified minimum effective insulation length is multiplied by K to make an approximate correction.
K,-
where: H—the altitude of the installation site, m. 2 Reference standards
GB311 High voltage test technology and insulation coordination 1
1. 1-×10
GB1304 General test methods for electrical insulation thermosetting laminates GB2900.19 Electrical terminology high Voltage test technology and insulation coordination GB5129.5 Epoxy laminated glass cloth board
GB5130 Electrical insulation laminate test method GB5131.2 Epoxy laminated glass cloth pipe
GB5132 Electrical insulation laminated pipe test Method 3 Terminology
This standard uses the following terms:
Operating lever - refers to an insulated tool made of insulating materials, the operator holds the end of the tool during operation, and touches the live body with the front end to operate.
Support rod refers to an insulated tool made of insulating materials, with its two ends fixed on the live body and the ground body (or frame, tower) respectively during operation to safely and reliably support the load of the live body. Pull (suspender) rod refers to an insulated tool made of insulating materials, connected to the traction tool during operation, and capable of safely and reliably bearing the load of the live body.
The State Bureau of Technical Supervision approved the implementation on 1992-10-01 on 1992-02-19
GB13398-92
The shortest effective insulation length of the insulating rod - refers to the maximum length that can withstand the highest temperature during operation Operating overvoltage level, the length of the shortest insulating part to ensure the safety of people and equipment,
The nouns and terminology used in the electrical test part of this standard comply with GB2900.19. 4 Classification and Technical Requirements
Insulation Rods are divided into three categories: operating rods, support rods and pull (hanging) rods according to their uses and operating methods. 4.1 Operating rod
4.1.1 General requirements for structure
The joints of the operating rod should be fixed insulated joints, and the joint connections should be tight and firm. The inner and outer surfaces and ends of the operating rod made of hollow tubes must be treated with moisture, and plugs are used to seal both ends of the hollow tube to prevent the inner surface from getting damp and dirty. The joints fixed on the operating rod should be made of materials with higher specific strength. For metal joints, the length should not exceed 100mm, and the ends and edges should be processed into arc shapes.
The total length of the operating rod is determined by the sum of the shortest effective insulation length, the length of the end metal joint and the length of the handheld part. The length of each part should comply with the provisions of Table 1.
Table 1
rated voltage
kv(rms)
10
35
63
110||tt ||220
330
500
4.1.2 Electrical properties
Minimum effective insulation length
m
0. 70|| tt||0.90
1.00
1.30
2.10
3.20
4.10
End metal joint length
No Greater than
m
0.10
0.10
0.10
0.10
0.10
0.10
0.10| |tt||The electrical performance of the 10~220kV voltage level operating lever should comply with the requirements in Table 2. 4.1.2.1
Table 2
rated voltage
kV(rms)
10
35
63
110
220
4.1.2.2
Distance between test electrodes
m
0.40
0.60
0. 70| |tt||1. 00
1.80
Power frequency flashover breakdown voltage
not less than
kV(r·m·s)
120 | | tt | | 180 | | tt | | 210 | | tt | | 300 | The length of the handheld part
is not less than
m
0. 60
0.60
0.60
0.70
0. 90
1.00
1. 00
1min power frequency withstand voltage
kV(r·m·s)
100
150
175
250
450
rated voltage
kv(rm:s)
330
500|| tt||4.1.3
Mechanical properties
GB13398—92
Table 3
Distance between test electrodes
m
2.80| |tt||3.70
The mechanical properties of the operating lever should comply with the requirements in Table 4. Load type
Table 4
5min power frequency withstand voltage
kV(rm-s)
420
640
Allowable load Value
Nominal diameter of operating rod
mm
28 and below
Bending moment.N·m
Tensile force, N||tt| |Twisting moment, N·m
4.2 Support rods and tension (hanging) rods
4.2.1 General requirements for structures
Not less than
Not less than||tt ||Not less than
90
600
30
more than 28
110
Operating impulse withstand voltage
kV(peak)
900
1175
Minimum failure load value
Nominal diameter of operating rod
mm
28 and below| | tt | , filling tube (hereinafter referred to as insulating tube) and insulating plate connection should be firm and flexible and convenient to use.
The shortest effective insulation length of support poles and tension (hanging) rods shall comply with the provisions of Table 5. The total length of support poles shall be determined by the shortest effective insulation length. Determined by the sum of the length of the fixed part and the length of the movable part. The total length of the pull (suspender) rod is determined by the sum of the shortest effective insulation length and the length of the fixed part. The length of each part should comply with the provisions of Table 5: Table 5
rated voltage
kV(r+ m*s)
10
35
63
110
220
330
500||tt| |4.2.2 Electrical properties
Minimum effective insulation length
0.40
0.60
0.70
1.00
1.80
2.80
3.70
Strut
0.60
0.60
0.70
0.70
0.80
0.80
0.80
fixed part length, m
pull (hanging) rod
0.20
0.20
0.20 | The electrical performance requirements of the operating lever are the same. 4.2.3 Mechanical properties
Length of active part of strut
m
0.50
0.60
0.60
0.60
0.60 | | tt | | 0.60 | | tt | | 0.60 | Certainly.
Strut
Classification level
1kN level
3kN level
5kN level
GB13398-92
Table 6
Allowable load
kN
1. 00
3.00
5.00
Failure load
not less than kN| | tt | Gauge table 7
pull (hanging) rod
classification level
10kN level
30kN level
50kN level
5 test methods
5.1 Appearance inspection, dimensional inspection and insulation material test 5.1.1 Appearance inspection
Allowable load
kv
10.0
30.0
50.0 | | tt | Check whether the sample is smooth, whether there are bubbles, wrinkles or cracks, whether the bond between the fiberglass cloth and the resin is intact, whether the connection between the rod segments is firm, etc. 5.1.2 Dimensional inspection
Use a measuring tape to measure whether the size of each sample meets the requirements in Table 1 or Table 5 of Chapter 4. 5.1.3 Insulating material test
The test of the insulating material used to make the insulating rod shall be carried out in accordance with the provisions of Appendix A. 5.2 Electrical test
High-voltage electrical test shall be carried out in accordance with the provisions of GB311. 5.2.1 Power frequency flashover breakdown voltage test
Use a single conductor with a diameter of not less than 30mm as the analog conductor. Voltage equalizing balls (or equalizing rings) should be installed at both ends of the analog conductor, with a diameter of not less than 200mm. The distance between the pressure equalizing ball and the test sample shall not be less than 1.5m. The test specimen is hung vertically.
The high-voltage test electrode of the test sample is arranged at the uppermost end of the insulating part of the test sample. The fitting on the top of the test sample can also be used as a high-voltage test electrode. The distance (test length) between the high-voltage test electrode and the ground electrode is as specified in Table 2 and Table 3 respectively. If there are metal parts between the two test electrodes, the distance between the two test electrodes should be added to this value. The total length of the metal part. The distance between the ground electrode and the ground should be no less than 1m. The ground electrode and high-voltage test electrode (when there is no hardware) are wrapped with metal foil or wires with a width of 50mm. During the test, first slowly increase the voltage to 75% of the test voltage value, and then continue to increase the voltage at a voltage increase rate of 2% per second until the test product flashover or breakdown occurs, and record the test voltage value at this time. The flashover breakdown voltage value of each test sample should meet the requirements in Table 2. 5.2.2 Power frequency withstand voltage test
The pretreatment and test layout of the test sample before the power frequency withstand voltage test are the same as those specified in 5.2.1. When testing multiple samples at the same time, the test layout is shown in Figure 1. The distance d between the samples should not be less than 500mm. ≥1000mm
GB13398-92
Figure 1 Power frequency withstand voltage and operation withstand voltage test wiring Figure 1 High voltage lead; 2-Analog wire, ≥30mm3-Voltage equalizing ball, D=200~300mm ; 4--Test specimen, the distance between specimens is d≥500mm: 5. Lower test electrode; 6-Insulating rod with ground lead voltage level of 10~220kV, apply the rated power frequency withstand voltage value specified in Table 2 between the two electrodes , pressurization time lmin.
For insulating rods with a voltage level of 330~500kV, apply the rated power frequency withstand voltage value specified in Table 3 between the two electrodes for 5 minutes.
During the test, each sample should not have flashover or breakdown. After the test, the sample should have no traces of discharge or burns, and should not generate heat. 5.2.3 Operational impact withstand voltage test
For insulating rods intended to be used on 330 and 500kV AC electrical equipment, in addition to the 5-minute power frequency withstand voltage test, an operating impact withstand voltage test must also be conducted.
The test voltage waveform adopts +250/250.0us standard operating shock wave. For each test sample, apply the rated operating impulse withstand voltage specified in Table 3 15 times between the test electrodes. The test sample should not suffer from flashover or breakdown, nor should there be any other damage.
5.3 Mechanical Test
Based on the actual stress conditions during operation, the insulating rods should be subjected to bending, twisting, tensile or compression tests respectively. The operating rod shall be subjected to bending, twisting and tensile tests, the support rod shall be subjected to compression test, and the tension (hanging) rod shall be subjected to tensile test. 5.3.1 Bending test
Conduct a bending test on the sample according to the layout in Figure 2. During the test, place the operating rod on the pulleys at both ends, and add a load in the middle until the specified value or until failure.
5.3.2 Torsion test
GB13398-92
Tube or rod diameter
nim
10 ~16
32||tt ||3951,51~64,64~77
The distance between the two brackets
mm
500
1500
2000
a .Test assembly drawing
AA
b.Bracket details
Figure 2 bending test diagram
When performing a twist test on the operating rod, fix the hand-held end of the operating rod , apply torque at the other end 2m away from the fixed point until the specified value or until failure.
5.3.3 Tensile test
When performing a tensile test on the sample, use clamps to fix both ends of the insulating part of the sample and the other end 2m away from it (fixing method See Figure 3), and be connected in series with the traction equipment and test equipment in a straight line, and then apply the pulling force until the specified value or until failure. 5.3.4 Compression test
The length of the specimen for the compression test on the strut is 2.0m. During the test, as shown in Figure 4, fix the strut firmly and apply a load on the free end of the strut in the axial direction. until the specified value or until failure. GB13398—92
a: Use elastic collets to tighten the insulating tube
Z227
b. Use a tapered chuck to tighten the insulating tube
c. End casting resin
Figure 3 Example of fixing method of insulating rod in tensile test Figure 1 - Tested insulating tube; 2 - Resin: 3 - Screw water
(a) Vertical press for material processing Test
Figure 4
Q
The strut is assembled into a working shape for tool testing
(b)
Strut compression test diagram||tt| |6 Inspection Rules
6.1 Inspection Items
The inspection items for various tests are specified in Table 8. Inspection items
Insulation material test
Appearance and dimensional inspection
Power frequency flashover breakdown voltage test
Power frequency withstand voltage test
Electrical test| |tt||Operational impact pressure test
Bend test
Mechanical test
Torsion test
Tensile test
Compression test
6.2 Insulating material test
GB13398-92
Table 8
The test of insulating materials shall be carried out in accordance with the provisions of Appendix A. 6.3 Type inspection
Test method
Appendix A of this standard
Article 5.1 of this standard
Article 5.2.1 of this standard
Article 5.2.2 of this standard
Article 5.2.3 of this standard
Article 5.3.1 of this standard
Article 5.3.2 of this standardbzxz.net
Article 5.3.3 of this standard
Standard 5.4.4 items
Inspection classification
Type inspection
V
V
V
V
V||tt| |V
>
V
Factory inspection
Sampling inspection
Sampling inspection
Sampling inspection
Sampling inspection
The manufacturer shall conduct type inspection on the products before finalization according to the technical conditions specified in Chapter 4 of this standard; if the manufacturing process of the insulating rod or the materials used change so as to affect the performance of the product, the type inspection shall be carried out again: in the insulation If there are no changes in the manufacturing process and materials used of the pole, the type inspection should be re-inspected every 5 years. Type inspection shall be carried out according to the inspection items specified in Article 6.1 and the test methods specified in Chapter 5. Three test specimens are used for each inspection item, and each test specimen should meet the technical conditions specified in Chapter 4. 6.4 Factory inspection
6.4.1 Appearance and dimensional inspection
All products leaving the factory should be inspected for appearance and size one by one. 6.4.2 Power frequency withstand voltage test and operating impact withstand voltage test All products leaving the factory shall be subjected to power frequency withstand voltage test or operating impact withstand voltage test according to the technical conditions specified in Table 2 and Table 3. 6.4.3 Mechanical test
For the batch of insulating rods leaving the factory, the mechanical properties should be randomly tested. 5 insulating rods should be randomly selected from a batch of products and subjected to mechanical testing according to the load specified in Table 8. The following time is 1min. After unloading, if the sample has no damage, local cracks, or permanent deformation, the sample has passed the mechanical test and is qualified. If all 5 sample samples have passed the factory mechanical test, the batch of products is deemed to have passed the sampling. Inspection, its mechanical properties meet the specified requirements. If any unqualified products are detected through testing among the sampled samples, the batch of products shall be mechanically tested one by one in accordance with the requirements of Table 9.
operate
operate
pole
support
pole
pull
hang
pole|| tt||Nominal outer diameter
mm
1kN level
3kN level
5kN level
10kN level
30kN level|| tt||50kN grade
Trial
Product
28 and below
Above 28
Logo, packaging, storage
7.1 mark| |tt||GB13398—92
Table 9
Tensile test
Test load
kN
1.50
1.50||tt ||25.0
75.0
125.0
Each insulating rod shipped from the factory should have a permanent and obvious mark: the name and specifications of the insulating rod;
Manufacturer name;
Color marking (see Figure 5);
Model number (including main features);
Manufacturing date.
Model
o
Factory name
Compression test
Test load
kN
2.50
7.50
12.50
Figure 5 Schematic diagram of insulating pole mark
7.2 Acceptance
Bending test
Test load
N·m||tt ||225
275
Torsion test
Test load
N·m
75
75
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