GB 50170-1992 Specification for the construction and acceptance of rotating electrical machines for electrical installation projects
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Engineering Construction Standard Full Text Information System
National Standard of the People's Republic of China
50170—92
Electrical Installation Engineering
Code of construction and acceptance of rotating electrical machines
Erection works of electrical installationsCode of construction and acceptance of electricrotatingmachineryConstruction Standard
1992—12—26
1993-07-01
State Bureau of Technical Supervision
Ministry of Construction of the People's Republic of China
Engineering Construction Standard Full-text Information System
Jointly Issued
Engineering Construction Standard Full-text Information System
National Standard of the People's Republic of China
Electrical Installation Engineering
Construction and Acceptance Specification for Rotating Electric Machines
GB50170—82
Editor Department: Ministry of Energy of the People's Republic of ChinaApproval Department: Ministry of Construction of the People's Republic of ChinaEffective Date: July 1, 1993
Engineering Construction Standard Full-text Information System
Engineering Construction Standard Full-text Information System
About Issuing the National Standard "Construction and Acceptance Specification for Rotating Electric Machines for Electrical Installation Engineering Notice on the Acceptance of Five National Standards Including "Construction and Acceptance Specifications"
Construction Standard [1992] No. 911
According to the requirements of the State Planning Commission's Letter of Bidding (1987) No. 78 and the Ministry of Construction's (88) Construction Standard No. 25, five standards including "Construction and Acceptance Specifications for Rotating Electrical Machines in Electrical Installation Engineering" jointly formulated by the Ministry of Energy and relevant departments have been reviewed by relevant departments and are now approved as mandatory national standards, namely "Construction and Acceptance Specifications for Rotating Electrical Machines in Electrical Installation Engineering" GB50170-92, "Construction and Acceptance Specifications for Panels, Cabinets and Secondary Circuit Connections in Electrical Installation Engineering" GB50171-92, "Construction and Acceptance Specifications for Storage Batteries in Electrical Installation Engineering" GB50172-92, "Construction and Acceptance Specifications for Cable Lines in Electrical Installation Engineering" GB50168-92 and "Construction and Acceptance Specifications for Grounding Devices in Electrical Installation Engineering" GB50169-92, for implementation on July 1, 1993. The third chapter of the original "Electrical Installation Engineering Construction and Acceptance Specifications" on rotating machines, the fourth chapter on panels, cabinets and secondary circuit connections, the fifth chapter on batteries, the eleventh chapter on cable lines and the fifteenth chapter on grounding devices are abolished at the same time. This standard is managed by the Ministry of Energy, and the specific interpretation and other work is the responsibility of the Ministry of Energy's Electric Power Construction Research Institute. The publication and distribution is organized by the Ministry of Construction's Standards and Norms Research Institute. Ministry of Construction of the People's Republic of China
December 16, 1992
Engineering Construction Standards Full Text Information System
Engineering Construction Standards Full Text Information System
Revision Notes
This standard is edited by the former Ministry of Water Resources and Electric Power in accordance with the requirements of the State Planning Commission's Bidding Letter (1987) No. 78 and the Ministry of Construction's (88) Construction Standards No. 25. It is specifically compiled by the Ministry of Energy's Electric Power Construction Research Institute in conjunction with relevant units. During the revision process, the specification group conducted extensive investigations and studies, carefully summarized the experience since the implementation of the original specification, absorbed some scientific research results, and widely solicited opinions from relevant units across the country. Finally, our department reviewed and finalized the draft together with relevant departments. This specification is divided into four chapters and one appendix. The main contents of this revision are: the scope of application of the specification has been expanded: the content of installation, construction and test acceptance of large generators has been supplemented; stricter regulations have been made on the airtightness test of hydrogen-cooled motors, and the requirements for hydrogen quality and hydrogen leakage of hydrogen-cooled motors have been added; revisions have been made to the storage, custody and lifting of rotors of large motors, the water quality of water-cooled motors, and the installation inspection of cast rotors.
If you find any deficiencies in the implementation of this specification, please send your opinions and relevant materials directly to the Electric Power Construction Research Institute of the Ministry of Energy, the management unit of this specification (Beijing Liangxiang, Postal Code: 102401), for reference in future revisions. Energy
December 1990
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Chapter 1
Chapter 2
Steam Turbine Generator and Phase Regulator
Section 1
Section 2
Section 3
Section 4
Section 5
Section 6
Section 7
Chapter 3
Section 1bzxz.net
Section 2
Section 3
Chapter 4
General Provisions
Coo5oecoe Core
Storage, Transportation and Lifting
Installation of Stator and Rotor
Installation of Collector Rings and Brushes
Hydrogen-Cooled Motor
Water-cooled motor
Business ticket
General provisions
*******
Storage and lifting
Inspection and installation
Project handover and acceptance
Terms used in this specification
Additional explanation
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Engineering construction standard full text information system
Chapter 1 General
Article 1.0.1 This specification is formulated to ensure the construction quality of rotating motor installation projects, promote the improvement of engineering construction technology level, and ensure the safe operation of rotating motors. Article 1.0.2 This specification applies to the construction and acceptance of steam turbine generators, phase regulators and motor installation projects in rotating motors. It is not applicable to the construction and acceptance of hydro-turbine generators.
Article 1.0.3 The installation of rotating electrical machines shall be carried out in accordance with the approved design. Article 1.0.4 The transportation and storage of rotating electrical machines shall comply with the provisions of this specification. When there are special requirements for the product, it shall also comply with the provisions of the product technical documents. Article 1.0.5 The storage requirements for equipment before installation shall be one year or less. When long-term storage is required, it shall comply with the special provisions for equipment storage. Article 1.0.6 The equipment and instruments used shall comply with the provisions of the current national technical standards and shall have a certificate of conformity. The equipment shall have a nameplate. Article 1.0.7 After the equipment and instruments arrive at the site, they shall be inspected and accepted within the prescribed period and shall meet the following requirements:
1. The packaging and sealing shall be in good condition.
2. Unpacking inspection and inventory, the specifications shall meet the design requirements, and the accessories and spare parts shall be complete.
3. The technical documents of the product shall be complete.
Fourth, according to the requirements of this specification, the appearance inspection is qualified. Article 1.0.8 The safety and technical measures in construction shall comply with the provisions of this specification and the current relevant safety and technical standards and technical documents of the product. For important construction items or processes, safety and technical measures should be formulated in advance. Article 1.0.9 The construction of building projects related to the installation of rotating electrical machines shall comply with the following requirements:
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
1. The construction quality of buildings and structures related to the installation of rotating electrical machines shall comply with the relevant provisions of the current national construction and acceptance specifications for building projects. 2. Before the equipment is installed, the construction project shall meet the following conditions: 1. The roof and floor work shall be completed and there shall be no leakage; 2. The concrete foundation shall reach the strength allowed for installation; 3. The on-site formwork and debris shall be cleaned up;
4. The pre-processed parts and reserved holes shall comply with the design, and the embedded parts shall be firm. 3. After the equipment is installed and put into operation, the construction project should complete the following work: 1. Secondary grouting and plastering work, and the secondary grouting strength must meet the requirements; 2. All construction work of the ventilation chamber. Article 1.0.10 Fasteners used for equipment installation, except for anchor bolts, should be galvanized products.
Article 1.0.11
When installing rotating motors in places with explosion or fire hazards, in addition to complying with the provisions of this code, they should also comply with the relevant provisions of the current national standard "Electrical Installation Construction and Acceptance Specifications for Explosion and Fire Hazardous Places for Electrical Installation Engineering".
Article 1.0.12
The installation and trial operation requirements of the mechanical part of the rotating motor should comply with the provisions of the relevant national professional regulations in force. Article 1.0.13
In addition to the implementation of the provisions of this code, the construction and acceptance of rotating motors should also comply with the provisions of the relevant national standards and specifications in force. Engineering Construction Standards Full Text Information System
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Chapter 2 Steam Turbine Generators and Phase Regulators
Section 1 General Provisions
Section 2.1.Article 1 This chapter applies to the construction and acceptance of synchronous steam turbine generators and phase regulator installation projects in fixed plants with a capacity of 6000kW and above. Article 2.1.2 The position, size and quality of the motor foundation, anchor bolt holes, channels, holes, embedded parts and cable pipes shall comply with the relevant provisions of the design and the current national construction and acceptance specifications for building projects. Article 2.1.3 Motors with strip-type bases should have 2 or more grounding points. Section 2 Storage, handling and lifting
Article 2.2.1 After the motor arrives at the site, the appearance inspection shall meet the following requirements: 1. The packaging is complete and there is no collision damage during transportation. 2. The protective layer of the surface of the core, rotor, etc. and the journal is intact, without damage and rust.
3. The stator of the water-cooled motor and the inlet and outlet water pipes of the rotor are sealed intact. 4. The nitrogen pressure of the motor transported with nitrogen meets the requirements of the product. Article 2.2.2 After the motor arrives at the site, the storage before installation shall meet the following requirements: 1. Before placing the motor, the load-bearing capacity of the sleeper pile, unloading platform and platform shall be checked. 2. The rotor and stator of the motor shall be stored in a clean and dry warehouse or factory building. When conditions do not allow, it can be stored on site, but measures such as fire prevention, moisture prevention, dust prevention, heat preservation and prevention of small animals from entering shall be taken.
3. The ambient temperature of the motor storage place shall comply with the provisions of the product technical conditions. The water-cooled motor shall not be lower than 5°C. For the motor stored in nitrogen, the nitrogen pressure shall meet the requirements of the product.
Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
4. When the rotor is stored, the guard ring shall not be subjected to force, and the large teeth shall be in a supporting position. The water and gas inlet and outlet channels of water-cooled and hydrogen-cooled motors must be sealed. The water-cooled motor should use dry and clean compressed air to blow the water-cooled winding. 5. During the storage period, the shaft neck, core, collector ring, etc. should be checked once a month. There should be no rust on the shaft neck, core, collector ring, etc., and the rotor should be rotated regularly according to the product requirements. 6. For the stator and rotor windings of large generators, the insulation resistance should be measured regularly with a megohmmeter. When the insulation resistance value is found to have dropped significantly, the cause should be found out and measures should be taken.
Article 2.2.3 During the lifting and transportation of the motor stator, the position of the force point should comply with the provisions of the product technical documents. The screw buckles of the special lifting ring on the stator should be tightened. When the rotor is lifted, the guard ring, shaft neck, small guard ring, inlet and outlet water tank, fan, collector ring, slot wedge wind bucket of the hydrogen-cooled rotor, etc. shall not be used as the force point. The shaft neck should be wrapped for protection, and the wire rope shall not touch the fan, collector ring, inlet and outlet water tank, slot wedge wind bucket of the hydrogen-cooled rotor, etc. The binding part of the wire rope and the rotor should be padded with protective pads.
Article 2.2.4 The transportation of large motor stators should take into account the direction when they are in place. Section 3 Installation of stators and rotors
Article 2.3.1 The iron core, windings, and the inside of the motor base should be clean, free of dust, grease, and debris.
Article 2.3.2 The insulation surface of the winding should be intact, without scars or bubbles. The end windings and the binding rings should be tightly cushioned, the fasteners and binding parts should be intact, without looseness, and the nuts should be tightened.
Article 2.3.3 The core silicon steel sheets should be free of rust, looseness, damage, or metallic short circuits. The ventilation holes and air ducts should be clean and free of debris. Article 2.3.4 The lead wires and terminal boards of the embedded temperature measuring elements should be clean and insulated, and their shielding grounding should be good. The temperature measuring elements installed at the water branch of the water collection pipe should be firmly installed and the temperature measuring elements should be intact.
Article 2.3.5 The stator slot wedges should be free of cracks, protrusions and looseness. The air-sound length of each slot wedge should not exceed 1/3 of it, and the end slot wedges must be firm; when corrugated plates are used under the slot wedges, they should be inspected according to product requirements. Article 2.3.6 When entering the stator chamber for work, it should be kept clean, and it is strictly forbidden to leave metal parts; the winding ends and the core should not be damaged. Article 2.3.7 The fasteners on the rotor should be tightened, the balancing blocks should not be increased, decreased or displaced, and the balancing screws should be locked. The hydrogen internally cooled rotor should be inspected for ventilation according to the manufacturer's regulations, and the ventilation holes should be unobstructed.
The fan blades should be firmly installed, without damage, cracks or weld cracks, and the bolts should be locked.
Article 2.3.8 When inserting the rotor, the stator winding or core shall not be damaged. The surface of the lower core and the end of the winding should be padded with cardboard or rubber board first. Article 2.3.9 The insulation of the pole winding of the salient pole motor should be intact, the pole should be stable, and the pole support block and connecting wire should be firm. Article 2.3.10 The air gap and magnetic field center of the motor should meet the requirements of the product. Article 2.3.11 Before installing the end cover, there should be no debris and residue inside the motor, and the air seal channel should be unobstructed. After installation, the joint of the end cover should be tight. For motors with end cover bearings, the joint surface of the end cover should be checked with a 10mm×0.05mm feeler gauge, and the insertion depth should not exceed 10mm.
Article 2.3.12 The installation of the lead and outlet of the motor shall meet the following requirements: The contact surface of the lead and outlet is good, clean, and free of grease, and the silver plating layer should not be filed.
2. The connection of the lead wire and the outlet wire should be tightened. When iron bolts are used, a closed magnetic circuit shall not be formed after the connection.
3. After the lead wire and the outlet wire of a large generator are connected, they shall be insulated and wrapped according to the manufacturer's regulations.
Section 4 Installation of collector rings and brushes
Article 2.4.1 The collector ring shall be concentric with the shaft, and the wobble shall comply with the provisions of the product technical conditions; when there is no provision, the wobble should not be greater than 0.05mm. The surface of the collector ring shall be smooth: Engineering Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
No damage or grease.
Article 2.4.2
The cable connected to the brush holder shall not cause the brush holder to be stressed, and its metal sheath shall not touch the bearing with insulating pads. Article 2.4.3 The brush holder and its crossbar should be fixed, the insulating liner and insulating pad should be free of damage and dirt, and their insulation resistance should be measured. Article 2.4.4 The surface gap between the brush holder and the collector ring should meet the product technical requirements; when the product has no regulations, the gap can be adjusted to 2-4mm. Article 2.4.5 The installation and adjustment of the brush should meet the following requirements: 1. Brushes of the same model and the same manufacturer should be used on the same motor. 2. The braided belt of the brush should be firmly connected and in good contact, and should not touch the rotating part or spring sheet. For brushes with insulating pads, the insulating pads should be intact. 3. The brush should be able to move freely up and down in the brush holder, and the gap between the brush and the brush holder should meet the product regulations; when there are no regulations, the gap can be 0.10-0.20mm. 4. The constant pressure spring should be complete and free of mechanical damage, and the model and pressure should meet the requirements of the product technical conditions. The spring pressure deviation on the same pole should not exceed 5%. 5. The contact surface of the brush should match the curvature of the collector ring, and the contact area should not be less than 75% of the cross section of a single brush. After grinding, the carbon powder should be cleaned. 6. The pressure of the non-constant pressure brush spring should comply with the regulations of its product. When there is no regulation, it should be adjusted to the lowest pressure that does not cause the brush to catch fire, which can be 14-25kPa. The pressure of each brush on the same brush holder should be uniform. 7. The brush should work within the entire surface of the collector ring and should not be close to the edge of the collector ring.
Section 5 Hydrogen-cooled Motor
Article 2.5.1 The insulation wrapping of the lead wire of the hydrogen-cooled motor shall comply with the relevant regulations of the manufacturer. The surface of the bushing should be clean, without damage and cracks, and the flange of the outlet box should be tightly fitted with the joint surface of the bushing flange and the motor body respectively. Before installing the outlet bushing, an electrical insulation test should be carried out, and an airtight test should be carried out in accordance with relevant regulations. Installation can only be carried out after the test is qualified. Engineering 6 Construction Standard Full Text Information System
Engineering Construction Standard Full Text Information System
Article 2.5.2 Hydrogen-cooled motors must be subjected to tightness tests on the stator, rotor, and hydrogen, oil, and water system pipelines. After the test is qualified, an overall airtightness test can be carried out. The test pressure and technical requirements shall comply with the manufacturer's regulations. Article 2.5.3 The hydrogen quality of hydrogen-cooled motors shall comply with the manufacturer's regulations. When the manufacturer has no regulations, it shall meet the following requirements: Hydrogen purity
Oxygen content in gas mixture
Absolute humidity of hydrogen
≤10g/m2
Article 2.5.4 The installation of hydrogen-cooled motors shall comply with other relevant regulations of this chapter in addition to complying with the provisions of this section.
Section 6 Water-cooled Motors
Article 2.6.1
Separate water pressure tests shall be carried out.
Article 2.6.2
Before installation, the water circuits of the stator, rotor, etc. shall be divided according to product requirements. The cooling water of the motor shall be the condensed water of the steam turbine or the water after desalination treatment. The water quality shall comply with Table 2.6.2. Water quality standard for cooling water of water-cooled motors
Conductivity
(us/CM)
(umoi/L)
Above 200MW
200MW and above
Below 200MW
200MW and above
Transparent and pure, without mechanical mixture
Note: When the motor is started, the conductivity of the cooling water should not be greater than 10s/CM. Engineering Construction Standard Full Text Information System
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