Some standard content:
GB/T8349—2000
Cited standards
Usage conditions
Rated values
Technical requirements
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Requirements and Materials for Bidding of Metal-enclosed Busbars Appendix A (Standard Appendix)
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GB/T8349—2000
This standard is a revision of GB83491987 "Phase-isolated Enclosed Busbar" based on the development of metal-enclosed busbar technology at home and abroad in recent years.
This revision also summarizes the experience of my country's metal-enclosed busbars in design, manufacturing, installation and operation in combination with China's national conditions, and supplements and modifies the existing deficiencies based on the implementation of the original national standard GB8349—1987 "Phase-isolated Enclosed Busbar". In the revision work, the relevant advanced foreign standards were referred to in order to adapt to the needs of international trade, technical and economic exchanges as soon as possible and promote the leapfrog development of my country's national economy. The revision mainly has the following changes: The content related to the common box enclosed busbar has been added, and the standard name has also been changed to "Metal Enclosed Busbar". The scope of Chapter 1 and the referenced standards of Chapter 2 have been added. The current Chapter 3 replaces the original Chapter 1, the current Chapter 4 replaces the original Chapter 3, the current Chapter 5 replaces the original Chapter 2, and the current Chapters 6.78.9.10 replace the original Chapters 4.567 and 8. The original Chapters 9 and 10 have been deleted. The article numbers and contents of each chapter remain unchanged or are appropriately changed. This standard will replace GB8349-1987 from the date of implementation. Appendix A of this standard is the appendix of the standard. This standard was proposed by the Electric Power Department of the State Economic and Trade Commission and is under the jurisdiction of the Electric Power Machinery Bureau of the State Power Corporation. The main drafting unit of this standard: Beijing Electric Power Equipment Factory. The drafting organizations of this standard include China Electricity Council, Beijing Survey and Design Institute, and North China Electric Power Design Institute. The main drafters of this standard include Luo Jingan, Tong Qunlun, Wang Yulin, Ge Baoxiang, and Yang Zeli. ine
1 Scope
National Standard of the People's Republic of China
Metal-enclosed bus
Metal-enclosed bus
GB/T8349—2000
Replaces GB8349—1987
This standard specifies the types, technical parameters, structural performance, test methods, design and manufacturing, packaging and transportation methods, installation and operation requirements of metal-enclosed bus.
This standard applies to metal-enclosed bus with voltage of 35kV and below, current of 40000A and below, and frequency of 50Hz (or 60Hz). Metal-enclosed bus is mainly used for generator outgoing lines and other power transmission and distribution circuits to safely transmit electric energy. This standard does not apply to bus ducts.
2 Cited standards
The clauses contained in the following standards constitute the clauses of this standard by being referenced in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB156-1993 Standard voltage (neqIEC38: 1983) GB311.1-1997 Insulation coordination of high-voltage transmission and transformation equipment (neqIEC71-1: 1993) GB/T762-1996 Standard current (eqVIEC59: 1938) GB/T763-1990 Heat generation of AC high-voltage electrical appliances during long-term operation GB/T2706-1989 Dynamic thermal stability test method for AC high-voltage electrical appliances (neqIEC694: 1984) GB/T2900.19—1994 Electrical terminology High-voltage switchgear (neqIEC50) GB/T3190—1996 Chemical composition of deformed aluminum and aluminum alloys (neqISO209-1) GB4208—1993 Degrees of protection of enclosures (IP code) (eqvIEC529:1989) GB/T5231—1985 Processed copper—Chemical composition and product shape GB/T11021—1989
Electrical insulation Heat resistance evaluation and classification (eqvIEC85: 1984) GB/T14048.1—1993 General rules for low voltage switchgear and control equipment (eqvIEC947-1: 1988) GB/T16927.1—1997 High voltage test technology Part 1: General test requirements (egvIEC60-11989) High voltage test technology Part 2: Measurement system (eqvIEC60-2: 1994) GB/T169 27.2—1997
GB50150—1991
1Standard for acceptance test of electrical equipment for electrical installation engineering GB50260—1996Code for seismic design of power facilities 3 Definitions
The definitions of terms adopted in this standard, in addition to those specified in GB/T2900.19, are supplemented as follows: 3.1 Metal-enclosed bus A combination of conductors and insulation enclosed in a metal casing. 3.2 Isolated-phase bus A metal-enclosed bus with each phase having a separate metal casing and a gap between the casings of each phase. Approved by the State Administration of Quality and Technical Supervision on April 3, 2000, and implemented on December 1, 2000
GB/T 8349—2000
3.3 Non-continuous enclosure type isolated-phase bus Each phase enclosure is divided into several sections, the sections are insulated, and each section has only one grounding point. 3.4 Fully connected isolated-phase bus continuous enclosure type isolated-phase bus Each phase enclosure is electrically connected, and the three-phase enclosures are short-circuited and grounded at the beginning and end. 3.5 Naturally cooled isolated-phase bus self-cooled isolated-phase bus A naturally cooled isolated-phase bus with air as the medium. 3.6 Forced-cooled isolated-phase bus force-cooled isolated-phase bus A forced-cooled isolated-phase bus with air as the medium. 3.7 Micro-pressure air-charge isolated-phase bus A phase-isolated enclosed bus filled with micro-pressure gas in the shell. 3.8 Common enclosure bus A metal-enclosed bus whose three-phase bus conductors are enclosed in the same metal shell. 3.9 Non-segregated-phase common enclosure bus A common enclosure bus whose bus conductors are not separated by partitions. 3.10 Segregated-phase common enclosure bus A common enclosure bus whose bus conductors are separated by partitions. 4 Conditions of use 4.1 Normal conditions of use 4.1.1 The ambient air temperature is -40℃ to +40℃. The altitude does not exceed 1000m. Humidity of the village: the daily average value is not more than 95%, and the monthly average value is not more than 90%. 4.1.3
According to the requirements of GB50260, the earthquake fortification intensity is 8 degrees (the design basic earthquake acceleration value does not exceed 0.2g). 4.1.5
The wind pressure does not exceed 700Pa (equivalent to a wind speed of 34m/s). 4.1.6 The effects of condensation or rain, snow, sudden temperature changes and sunshine should be considered. The ice thickness is not more than 20.mm
The metal enclosed busbar should not contain corrosive gases and explosive dust. 4.1.8
4.2 Special use conditions
4.2.1 For metal enclosed busbars where the ambient air temperature is higher than 40℃, refer to the requirements of GB311.1, and the test voltage of its insulation in the dry state shall be the rated withstand voltage value specified in Table 1 of this standard multiplied by the temperature correction factor K, K.=1+0.0033(T-40)
Where.T-
Ambient air temperature, °C.
(1)
4.2.2 For the insulation of metal-enclosed busbars used at altitudes above 1000m but not exceeding 4000m, refer to the requirements of GB311.1. For every 100m increase in altitude, the insulation strength decreases by about 1%; when tested at altitudes not higher than 1000m, the test voltage shall be the rated withstand voltage specified in Table 1 of this standard multiplied by the altitude correction factor Ka. K,- 1.1 - H X10-
Where, H is the altitude of the metal-enclosed busbar installation site, m. 4.2.3 Under other special conditions of use, the design and application of the metal-enclosed busbar shall be agreed upon by the supplier and the buyer. 5 Rated value
5.1 Rated voltage
According to the provisions of GB156, the rated voltage of metal-enclosed busbar is: 2
GB/T8349—2000
1, 3.15, 6.3, 10.5, (13.8), 15.75, (18), 20, (24), 35kV. 5.2 Rated current
The rated current of different types of metal-enclosed busbars is as follows according to the requirements of GB/T762. 5.2.1 Generator main circuit isolated phase enclosed busbar The rated current of the generator main circuit isolated phase enclosed busbar is: 3150, 4000, 5000, 6300, 8000, 10000, 12500, 16000, 20000, 25000, 31500, 40000A. Note: According to actual needs, other current levels can be appropriately selected after consultation between the supply and demand parties. 5.2.2 Generator branch circuit phase-separated enclosed bus The rated current of the generator branch circuit phase-separated enclosed bus is: 630, 800, 1000, 1250, 1600, 2000, 2500, 3150, 4000A. 5.2.3 Common box enclosed bus
The rated current of the common box enclosed bus is:
1000, 1250, 1600, 2000, 2500, 3150, 4000, 5000, 6300A. 5.3 Rated frequency
The rated frequency of the metal enclosed bus is 50Hz (or 60Hz). 5.4 Insulation level
The insulation level of the metal enclosed bus is specified in Table 1 with reference to the requirements of GB311.1 and GB/T14048.1. Insulation level of metal enclosed busbar
Insulation level
Rated voltage
(effective value)
Maximum voltage
(effective value)
5.5 Dynamic and thermal stability of metal enclosed busbar
The dynamic and thermal stability current of metal enclosed busbar is shown in Table 2. Rated 1min power frequency withstand voltage
(effective value)
(effective value)
Rated lightning impulse
Strike withstand voltage
(peak value)
Generator main circuit phase-separated
Enclosed busbar
Generator branch circuit
Phase-separated enclosed busbar
Phase-separated common box enclosed busbar
Non-phase-separated common box enclosed busbar
GB/T 8349—2000
Table 2 Dynamic and thermal stability current of closed busbar
Rated current
effective value
3150~40000
630~4000
1000~6300
1000~6300
Dynamic stability current
(peak value)
125, 160, 200, 250,
3 15, 400, 500, 630
200, 250, 315, 400,
500, 630, 800
40, 63, 80, 100, 125, 160
63, 80, 100, 125, 160
Thermal stability current
(2s) (effective value)
50, 63, 80, 100,
125, 1 60, 200, 250
80, 100, 125, 160,
200, 250, 315
16, 25, 31.5, 40, 50, 63
25, 31.5, 40, 50, 63
After the metal-enclosed busbar is subjected to the dynamic and thermal stability current specified in Table 2, there shall be no mechanical damage that affects the normal operation of the product, such as obvious deformation of the busbar conductor, hardware, casing, support and other parts and components, and reduction in insulation performance of insulators, bushings and other insulating components due to damage (if there is a dispute, it can be judged by the corresponding insulation performance test results); there shall be no joint welding or burns that affect normal operation (if there is a dispute, it shall be judged that the temperature rise under rated current shall not be greater than half of the specified value) 5.6 Allowable temperature and temperature rise of various parts of the metal-enclosed busbar When the metal-enclosed busbar is operating under normal conditions, the temperature and temperature rise of various parts shall comply with the requirements of Table 3. Table 3 Temperature and allowable value of temperature rise of the hottest point of metal-enclosed busbar Parts of metal-enclosed busbar
Conductor fastened with bolts
Contact surface of casing
Casing support structure
Insulating parts
Maximum allowable temperature, °C
Determined by the type of insulating material
According to GB/T11021 (see Table 4)
Maximum allowable temperature rise, K
Note: The contact surface of the conductor or casing fastened with bolts of metal-enclosed busbar shall not be composed of different metals or metal coatings. For forced-cooled phase-separated enclosed busbars, the manufacturer shall provide the rated continuous operating current values of each part of the busbar under the conditions of allowable temperature and temperature rise, forced cooling and natural cooling. Table 4 Permissible temperature of insulating materials
Heat resistance grade of insulating materials
5.7 Product model representation
Maximum permissible temperature
GB/T8349——2000
II FMIB
Characteristic generation
Cooling method
Micro positive pressure
Fast saturation reactor
ICoexistence of micro positive pressure and fast saturation reactor
Rated current (A)
Rated voltage (kV)
Metal enclosed busbar
Natural cooling
Forced cooling
Local cooling
Fully connected phase-separated
Unconnected phase-separated
Non-phase-separated common box
Phase-separated common box
Example: QLFM-20/25000-ZI represents a fully connected phase-separated metal enclosed busbar with a rated voltage of 20kV, a rated current of 25000A, natural cooling and micro positive pressure.
6 Technical requirements
6.1 Materials
The conductor of the metal-enclosed busbar should be made of 1060 grade aluminum or T2 grade copper, and meet the requirements of GB/T3190 or GB/T5231.
6.2 Common types of isolated phase-enclosed busbars
The shell of the isolated phase-enclosed busbar is usually fully connected. 6.3 Cooling method
The cooling method of the isolated phase-enclosed busbar can be natural cooling or forced cooling. 6.4 Anti-resonance
Metal-enclosed busbars should avoid resonance.
6.5 Grounding
6.5.1 The shell of the metal-enclosed busbar and the metal parts of the supporting structure should be reliably grounded. 6.5.2 The shell of the fully connected isolated phase-enclosed busbar can be grounded at one or more points through a short-circuit board. When single-point grounding is used, a reliable grounding point must be set on one of the short-circuit boards; when multi-point grounding is used, a reliable grounding point can be set at each but at least one of the short-circuit boards.
6.5.3 Each segmented shell of the non-connected phase-isolated enclosed busbar must have and is only allowed to have one point of grounding. 6.5.4 There must be a reliable electrical connection between the sections of the shell of the common box enclosed busbar, and at least one section of the shell should be reliably grounded. 6.5.5 When the busbar passes through a short-circuit current, the induced voltage of the shell should not exceed 24V. 6.5.6 The grounding wire should have a sufficient cross-section and be able to pass the short-circuit current. 6.6 Temperature measuring device
Temperature measuring devices for monitoring the temperature of the conductor, joints and shell can be set at the joints or other parts of the metal enclosed busbar that are prone to overheating. 6.7 Installation of reactors
Fast-saturation reactors can be installed in the shell circuit of the fully connected phase-isolated enclosed busbar. 6.8 Shell protection level
GB/T8349—2000
The shell protection level is selected according to the requirements of GB4208. Generally, the isolated phase enclosed busbar is IP54. The common box enclosed busbar is determined by the supply and demand parties.
6.9 Inflating pressure and air leakage rate
The shell of the micro-positive pressure inflated phase-separated enclosed busbar is filled with dry purified air at a pressure of 300Pa2500Pa, and its air leakage rate shall not exceed 6% of the volume of the shell per hour.
7 Structure
7.1 General requirements
The structure of the metal-enclosed busbar should be convenient for installation, operation, inspection, commissioning and maintenance. 7.2 Shell support method
The structure of the metal-enclosed busbar should be able to be arranged on the floor or bracket, and can also be suspended on the beam or frame. 7.3 Insulator support method
One or more insulators are allowed to support the same section of each phase conductor, but the insulation and mechanical strength requirements must be met. 7.4 Conductor insulation treatment
The surface of the busbar conductor can be dipped or coated with insulating materials. 7.5 Connection between conductors and casing of metal-enclosed busbar 7.5.1 Connection of conductors
7.5.1.1 The connection between conductors of each manufacturing section can be welded or bolted, and the connection with the equipment should be bolted. 7.5.1.2
For conductors with a current equal to or greater than 3000A, the conductive contact surface of the bolted connection should be silver-plated. 7.5. 1.3
When the conductors are bolted, the fasteners of the conductors with a current less than or equal to 3000A can be ordinary carbon steel, and the fasteners of the conductors with a current greater than 30boA should be non-magnetic materials. 7.5.2 Connection of casing
The sections of the casing of the fully connected phase-separated enclosed busbar can be welded or detachably connected, and the sections of the non-connected phase-separated enclosed busbar casing should be insulated and sealed.
7.5.2.2 The metal-enclosed busbar casing and the equipment casing should be detachably connected. 7.5.2.3
Except for special requirements, the shell of the isolated phase enclosed busbar and the equipment shell should be insulated and vibration-isolated. The shell sections of the common box enclosed busbar can be connected by welding or detachable connection. 7.6 Compensation device
Metal enclosed busbars with a straight section longer than 20m, different foundation connection sections and equipment connection points should be equipped with compensation devices for thermal expansion and contraction or foundation settlement. The conductors should be braided copper braids or thin aluminum or copper laminated expansion joints, and the shell should be rubber expansion sleeves, aluminum filter tubes or other connection methods.
7.7 Anti-hydrogen measures
Hydrogen discharge holes should be set on the terminal box of the hydrogen-cooled generator, and sealed hydrogen isolation measures should be taken at the connection between the terminal box and the isolated phase enclosed busbar. 7.8 Anti-condensation
Anti-condensation devices can be set at appropriate locations of metal enclosed busbars. For naturally cooled isolated phase enclosed busbars, sealed insulating sleeves or other measures should be taken at the indoor and outdoor wall penetration points to prevent condensation caused by indoor and outdoor air convection in the shell.
7.9 Fire prevention
When the metal enclosed busbar passes through the fireproof partition wall or floor, the shell should be equipped with a fireproof partition or sealed with fireproof materials to prevent the spread of smoke and fire.
7.10 Welding of conductor and shell
7.10.1 The welding of conductor and shell should adopt inert gas shielded arc welding. 7.10.2 The cross section of the conductor and shell weld should not be less than 1.25 times the cross section of the welded metal. 6
GB/T8349—2000
7.10.3 The weld is not allowed to have cracks, burn-through, weld pits, weld nodules, etc. The length of the weld that is not penetrated shall not exceed 10% of the weld length, and the depth shall not exceed 5% of the thickness of the welded metal.
7.10.4 The weld shall be inspected and qualified by X-ray or ultrasonic flaw detection. The sampling inspection length of the conductor and expansion joint shall not be less than 25% of the weld length, and the outer shell shall not be less than 10% of the weld length. 7.11 Surface treatment
7.11.1 The inner surface of the shell and the outer surface of the conductor of the metal enclosed busbar shall be painted with matte black paint, and the outer surface of the shell shall be painted with light-colored paint. 7.11.2 The supporting steel components of the shell shall be painted or hot-dip galvanized. 7.12 Forced air-cooled phase-isolated enclosed busbar 7.12.1 The connection between the forced air cooling device and the phase-isolated enclosed busbar shall be equipped with insulation and vibration isolation devices. 7.12.2
The forced air cooling system can be a circulating, open or a compound cooling system with both. 7.12.3
The busbar and cooling system should be equipped with devices to monitor parameters such as the temperature of the conductor and shell, the inlet and outlet air temperature of the cooler, and the air flow rate.
1 To prevent charged particles generated by a busbar phase-to-ground fault from entering another phase with the cooling air, an ion elimination device should be installed at the air duct between the phases of the casing to filter out the charged particles to avoid expanding the short-circuit accident. 7.12.4
8.1 The tests of metal-enclosed busbars are divided into type tests, factory tests and field tests. 8.2 Type tests
8.2.1 Type tests must be carried out in any of the following situations: a) When a new product is being trial-produced;
b) When there are major changes in the design, process, or materials of the product, which are sufficient to cause significant changes in product performance; c) When the factory test results are significantly different from the previous type test results. 8.2.2 Test items
a) Insulation resistance measurement;
b) Rated 1min power frequency dry withstand voltage test;c) Rated 1min power frequency wet withstand voltage test;d) Rated lightning impulse withstand voltage test;e) Temperature rise test;
f) Dynamic and thermal stability test;
g) Water spray test;
h) Air sealing test;
i) Shell protection grade test.
8.2.3 Test method
a) Insulation resistance measurement
According to the requirements of GB50150, the insulation resistance between the metal enclosed bus conductor (phase) to the conductor (phase) and the conductor (phase) to the shell (ground) should be measured, and the value should not be less than 100M2. When measuring insulation resistance, the voltage level of the megohmmeter shall be implemented as follows: when the rated voltage of the metal-enclosed busbar is 1000V, a 1000V megohmmeter shall be used; when the rated voltage of the metal-enclosed busbar is 3000V or above, a 2500V megohmmeter shall be used. b) Rated 1min power frequency dry withstand voltage test The rated 1min power frequency dry withstand voltage test shall be carried out in accordance with the requirements of GB/T16927.1 and GB/T16927.2. The test voltage value is shown in Table 1 of 5.4 of this standard.
c) Rated 1min power frequency wet withstand voltage test The rated 1min power frequency wet withstand voltage test shall be carried out in accordance with the requirements of GB/T16927.1 and GB/T16927.2. The test voltage value is shown in Table 1 of 5.4 of this standard.
d) Rated lightning impulse withstand voltage test
GB/T 8349—2000
The rated lightning impulse withstand voltage test shall be carried out in accordance with the requirements of GB/T16927.1 and GB/T16927.2. The test voltage value is shown in Table 1 of 5.4 of this standard. bZxz.net
e) Temperature rise test
According to the requirements of GB/T763, the metal enclosed busbar is passed with the rated current. After its temperature stabilizes, the temperature and temperature rise of each part shall not exceed the values specified in Tables 3 and 4 of this standard.
f Dynamic thermal stability test
According to the requirements of GB/T2706, the metal enclosed busbar shall be able to withstand the dynamic and thermal stability currents specified in Table 2 of this standard. g) Water spray test
The outer surface of the typical test section of the metal-enclosed busbar (including welds, various connections of the shell, insulator installation holes, inspection holes, etc.) is subjected to an artificial water spray test. During the test, a hose with a diameter of 2.5 cm is used to spray water from a direction at an angle of 45° to the horizontal plane through a nozzle 3m away from the shell. The water pressure is maintained at 1.1MPa. After continuous spraying on both sides along the length of the busbar for 5 minutes, there should be no trace of water ingress inside the shell. h) Air tightness test
The shell is filled with compressed air with a pressure of 1500Pa (equivalent to 150mmH0). At the same time, soapy water is used to check the shell welds and other assembly connection sealing surfaces on the shell. It is qualified when there are no obvious bubbles (leakage points). i) Shell protection level test
It is carried out in accordance with the requirements of GB4208.
8.3 Factory test
8.3.1 Requirements
Each set of metal enclosed busbars must be subjected to factory test before leaving the factory, and can only leave the factory after passing the test8.3.2 Test items
a) Inspection of overall dimensions and appearance quality; b) Insulation resistance measurement;
c) Rated 1min power frequency dry withstand voltage test; d) For phase-separated enclosed busbars inflated with slight positive pressure, an airtight test shall be carried out8.3.3 Test methods
a) Inspection of overall dimensions and appearance quality
The overall dimensions and appearance quality of metal enclosed busbars shall be inspected and meet the requirements of the design drawings and this standard. b) Insulation resistance measurement
Perform in accordance with the requirements of a) in 8.2.3 of this standard. c) Rated 1min power frequency dry withstand voltage test shall be carried out in accordance with the requirements of b) in 8.2.3 of this standard. d Airtightness test
Test each section before leaving the factory according to the requirements of h) in 8.2.3 of this standard. 8.4 Field test
8.4.1 Requirements
Field test shall be carried out after the metal enclosed busbar is installed and before it is connected to the generator, transformer and other equipment, and the voltage transformer and other equipment shall be disconnected during the test.
8.4.2 Test items
a) Insulation resistance measurement;
b) Rated 1min power frequency dry withstand voltage test; c) The outdoor part of the naturally cooled phase-separated enclosed busbar shall be subjected to water spray test; 8
GB/T8349—2000
d) The phase-separated enclosed busbar with slight positive pressure inflation shall be subjected to air sealing test. 8.4.3 Test method
a) Insulation resistance measurement
According to the requirements of GB50150, the insulation resistance between the metal-enclosed busbar conductor (phase) and the conductor (phase) and the shell (ground) shall be measured. For the phase-separated enclosed busbar, its value shall not be less than 50MQ; for the common box enclosed busbar, its value shall not be less than 10MQ. When measuring the insulation resistance, the voltage level of the megohmmeter shall be implemented in accordance with the following provisions: when the rated voltage of the metal-enclosed busbar is 1000V, a 1000V megohmmeter shall be used; when the rated voltage of the metal-enclosed busbar is 3000V and above, a 2500V megohmmeter shall be used. b) The rated 1min power frequency dry withstand voltage test shall be carried out in accordance with the requirements of GB/T16927.1 and GB/T16927.2, and the test voltage value shall be 75% of the power frequency withstand voltage value specified in Table 1 of this standard.
c) Water spray test
It shall be carried out in accordance with the requirements of g) in 8.2.3 of this standard. d) Gas sealing test
It shall be carried out in accordance with the requirements of h) in 8.2.3 of this standard. 9 Equipment supporting metal-enclosed busbars
9.1 The supporting equipment of metal-enclosed busbars may include current transformers, voltage transformers, high-voltage fuses, lightning arresters, neutral arc suppression coils or grounding transformers, etc.
9.2 The phase-separated enclosed busbars with slight positive pressure inflation shall also include inflation equipment. 9.3 The phase-separated enclosed busbars with forced cooling shall also include equipment such as fans, air coolers, air filters, and deionization devices. 9.4 Voltage transformers, high-voltage fuses, lightning arresters, neutral point equipment, etc. shall be installed in the cabinet and connected to the metal-enclosed busbars through insulating sleeves or partitions to prevent the faults in the cabinet from affecting the busbars. 10 Bidding, marking, packaging, transportation and purchase and storage 10.1 Bidding
The requirements and materials for bidding are shown in Appendix A (Appendix to the standard). 10.2 Nameplate
10.2.1 The nameplate should be installed in a conspicuous position on the metal-enclosed busbar casing near the generator in the factory. 10.2.2 The nameplate content includes:
a) Model;
b) Name;
c) Rated voltage;
d) Rated current;
e) Rated frequency:
f) Dynamic stability current;
g) Thermal stability current;
h) Manufacturing unit;
i) Factory number;
j) Manufacturing year and month;
k) Product standard number.
10.3 Each section casing should be marked with its segment unit and phase number when leaving the factory for easy installation. 10.4 Metal-enclosed busbars should be properly packed and fixed in accordance with the design when leaving the factory to prevent sliding and damage during transportation. The following markings should be on the packaging box: a) Product name and model; b) Contract number; c) Manufacturer name and address; d) Receiving unit and destination; e) Gross weight and net weight; f) Packing box size; GB/T8349—2000 g) Precautions: "Handle with care", "Prevent moisture", "Prevent collision", "Do not invert", etc. 10.5 Metal-enclosed busbars should be stored in a dry, ventilated warehouse without corrosive substances. If stored for a long time, check at least once every six months and deal with any problems in a timely manner.
10.6 When the metal enclosed busbar leaves the factory, the following documents shall be carried along with it: a) product certificate;
factory test report;
installation drawing;
installation, operation and maintenance instructions;
e) packing list;
f) packing list.
Tizw.nhei
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