GB 16895.20-2003 Electrical installations in buildings Part 5: Selection and installation of electrical equipment Chapter 55: Other equipment Section 551: Low voltage generating equipment
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t8168.2-20/:60364--551.1994 power generation equipment as a public alternative power source (resource system, for gas equipment stomach of the auxiliary production equipment can be produced and created, for the core gas equipment to the requirements 5:1.
Appendix A informative appendix "multi-step sensitive
CB16895.20-2 003/1EC.60364-5-551.1994R16895, Articles 551.2, 551.3, 551.4, 551.5, 551.6 and 551.7 are mandatory, and the rest are deferred. The national standard for electrical installations covers all aspects of the work: Part 1: National standards, basic principles and definitions. Part 2: t||·General performance evaluationwwW.bzxz.Net
Part 4
Safety protection
Part 5 Selection and installation of electrical equipment
Part 6 Inspection
Part 7
Requirements for special environmental installations or locations
This part is equivalent to 1EC60364-5-55:199. Physical and chemical performance of electrical equipment Part 1: Selection and installation of electrical equipment Chapter 5: Its structure Section 531: Low cost power generation equipment. For use, the clauses of this part are in accordance with the appendix of TE606151. This part is issued by China Electric Power Industry Association. This part is under the jurisdiction of the National Technical Committee for Electrical Equipment Standardization. The drafting director of this part is China Light Industry International Design Institute. The main drafters of this part are Huang Miaoqing and Li Fengxuan. 551.1 General provisions 551.1.1 Scope of application GR 16895.20—2003/IEC 60364-5-551,1994 Electrical Installations of Buildings
Part 5: Selection and Installation of Electrical Equipment Chapter 55: Other Equipment
Book 551: Low Voltage Generating Equipment
55t, 1.1.1 This part applies to low voltage and extra-low voltage self-contained gas installations equipped with generating equipment. The generating equipment is used to continuously and sporadically supply all or part of the equipment. The requirements set out in this part take into account the following: - Electrical installations that are not connected to the public grid and are supplied by electrical installations that are not connected to the public grid; - Electrical installations that are connected to the public grid and are supplied by electrical installations that are connected to the public grid: - An appropriate combination of the above.
This part is applicable to both electrical and telecommunication installations. Special voltage core equipment, this type of equipment has already included all the top requirements for gas safety, the product standard certificate, the special requirements of 11-foot thermal power 11:54-5-1:5, when installing power generation equipment in electrical equipment connected to the public power grid, the general requirements of the public power company should be understood to be coordinated, 551.1.1,2 Consider the power generation equipment using the following small power sources: internal combustion engine:
steam turbine:
electric motor
—dead battery
electrochemical power if others:
other power sources:
551.1.1.3 Consider only the following electrical performance core equipment: synchronous generator with grid excitation and independent magnetic assist; asynchronous generator with magnetic and automatic magnetic! Grid-commutated and self-commutated static inverters, with or without step-down equipment: 551,1.1.4 Power generation equipment considering the following options: a permanent electrical installation for power supply;
a temporary gas-fired device for power supply;
a mobile or non-permanent fixed-installation gas-fired device for power supply. 551.1,2 Normative referenced documents
The clauses in the following documents become the clauses of this part through the introduction of this part of G15. For any dated referenced document, any subsequent amendments (including abandoned or revised versions) are not applicable to this part. However, the latest versions of other documents may be used in accordance with the provisions of this part. For any dated referenced document, the latest versions shall apply to this part.
GB14821.-163354411012GR1G995.31397 Electrical installation in buildings Part 5, Selection and installation of electrical equipment Part 64: Grounding configuration and GB16895.20-2003/EC60364-5-551:1994 Protective conductor (id1E:61354554,1180)1F:60364-4-46: 1981 Nuclear power equipment Part 1: Safety protection Section 46: Full disconnection and switching 551.2 General requirements
551.2.1 The excitation and switching method of the generating equipment should be suitable for the intended application of the generating equipment. The generating equipment should not be subjected to the safety and normal test of other power sources.
Allow: When the generating equipment is operated in series with other power sources and the public grid, its expected thermal circuit current and grounding current should be estimated for each power source or power source combination that can be excited to operate independently. The short-circuit current expected in the medium operation mode (including connection to the public grid under appropriate circumstances) should not exceed the short-circuit protection device inside the electrical equipment. 551.2.3 When the generator supplies power to electrical devices that are not connected to the public power grid, or operates as a substitute power source for the public power grid, the transformer capacity and operating performance are required to ensure that the voltage or rate caused by the expected load after being turned on or off will not cause harm to the equipment when it deviates from the expected operating range: If the generator is overloaded, it should have the function of automatically eliminating the fault of part of the electrical device when necessary.
Note 1: The proportion of the capacity of the generating equipment in the room and the actual power consumption of the machine should be taken into consideration. 2: The power rating of the protective device specified in the protection device is specified in the protection device. Note 3: When installing the generating equipment in a building or an electrical installation, the moving parts and components that are at high cost shall be planned by the operator. The appearance of harmful gas levels, etc., may change the external influence of the electrical signal (IEC K34-3-33>). 55!.3 For the extra-low voltage (F1.V) system with both direct contact and indirect contact protection, which is supplied by more than one power source, the additional requirements are as follows:
551.3.1 When a SErV PFTV system may be supplied by more than one power source, each power source shall comply with the requirements of G14821.1+1.1.2. When there is one or more power connections, it shall comply with 5.1.3 and 5.1.5 of GB14321.2. Regarding the requirements for PETV systems:
If one or more power sources do not meet GB [4827.1 5.1, 2 requirements, the system should be handled according to FE1, V system: well 1482115.3 requirements
551.3.2 When the extra-low voltage system needs to maintain the power supply to it after one or more power supplies are removed, any power supply or power supply group that can operate independently and also includes 1 other power supply or power supply group must have a load monitoring core that can maintain the low voltage system for a period of time. When an extra-low voltage system is disconnected from the low voltage switch, measures should be taken to prevent it from being damaged or shutting down other extra-low voltage systems. Note: For power supplies that may be required (see [E-3-) 551.4 Contact protection || tt || Any electrical installation that can be operated independently of another power supply or power supply group should have temporary contact protection 551.4.1 The protection method of automatically disconnecting the power supply shall be adopted. The protection method sequence shall include the provisions of G1482-.1.1, except for some special circumstances, in accordance with the provisions of 551.4.2.552.4,5 or 5514.4. 551.4.2 An alternative power supply (backup system) generated from a self-contained storage and used as a public power grid is an additional requirement for the type of concave gas installation. When the generating equipment is operated as an alternative power source and connected to the T system, its protection against automatic disconnection of the power supply shall not rely on reverse connection with the grounding point of the public power grid. An appropriate equalization pole shall be provided. 551.4.3 Additional requirements for electrical installations equipped with static inverters 551.4.3.3 When the indirect connection protection of the parts of the electrical installation supplied by the static inverter is based on the bypass switch, the protection of the common inter-circuit switch power supply cannot be within the time required in GH14321.1.1 - on the negative side of the static inverter, the exposed conductive parts and the external conductive parts shall be connected in accordance with 7.1 of 14821.1.The provisions of auxiliary and other city positions. The required resistance of auxiliary and other center-to-center bonding conductors between the conductive parts that can be touched at the same time shall meet the following conditions: k
In the requirements:
, within -5E, only the excess grounding current applied by the inverter is stopped. Note: When the equipment can be used for a period of time and the state is recorded, the requirements of 551.7 are also applicable. 551.4.3.2 The DC current or wave filter generated by the static inverter shall not affect the correct operation of the protective device when the equipment is selected.
551.4.4 When the equipment in the generator is not permanently installed, the requirements of the protection for its dynamic cutting are also applicable to mobile generating equipment and generators that can sometimes be used as temporary or several-term operation. These generating equipment may be used as part of electrical equipment similar to the above purposes. This clause does not apply to electrical equipment with permanent installation. For more information, please refer to E309, 551.4.4.1: Between the equipment and the separated equipment, a protective conductor consisting of a suitable terminal or an electric conductor shall be provided, and its surface shall comply with the provisions of Table 64F in GB6A95, 3. All protective conductors shall be selected in accordance with the provisions of this standard. 551.4.4.2 According to the provisions of GB14521.1, 1T, TN and TT systems, a current detector with a rated residual current of less than 10 mA should be installed as an automatic power cut-off device: In the system, the residual current detector may not be activated unless there is a sensitive point in the storage to measure the residual current. 551.5 Overcurrent protection || TT || 551.5.1 When the power generation equipment is equipped with a current detector, its control point should be set as close to the output terminal of the power generation equipment as possible. Note: The net power generated by each generator may be far less than the short-circuit power output of the public network. 551.5.2 When the rural power equipment is slow and runs in parallel with the public power grid, or two or more generating equipment may produce power during operation, the virtual wave will be restricted so that the conductor's heat will not exceed its value. The following measures can be used to limit the influence of the harmonic liquid circulation through the agricultural motor with compensation winding;
In the early formation of the generator, appropriate restrictions should be made: - Install a switch that cuts off the circulating current loop. He should take locking measures to prevent the above-mentioned protection from being embedded in the afternoon! Installation of Haibo investment reserve
Other appropriate measures,
Note: When the high-voltage 551.6 generating equipment produced in the United States is used as a substitute for the general power supply of the public power grid (backup system>. The additional requirements for electrical equipment 551.6.1 should be taken in accordance with the relevant isolation requirements of 1HL:50354-1-45 to prevent the generating equipment from running in parallel with the public power grid. Appropriate preventive measures include:
- Electrical, mechanical or electrical-mechanical interlocking between the operating mechanisms of the transfer switch or between the control circuits of the transfer switch;
- There is a multi-user system with a single transfer group - using its "break before make" action Three operating protection switches; automatic conversion and closing devices with suitable locks: other effective safety operating measures.
551.6.2 In the case of the neutral conductor of the system 1-5, when the residual current protector is installed and stopped, it should be prevented from malfunctioning due to the existence of the neutral conductor and the increase in parallel. Note that in the TN system, the neutral conductor of the equipment can be connected to the neutral conductor of the specified public power supply, so as to prevent voltage disturbances caused by induction current such as lightning:
551. The power generation equipment Additional requirements for electrical equipment when it may be operated in parallel with the public power grid 551.7.1 The selection and certification of the generators to be operated in parallel with the public power grid shall be careful to avoid adverse effects on the power supply network and other electrical devices caused by power consumption, voltage changes, wave formation, two-phase unbalanced, automatic, parallel operation or voltage fluctuations. The relevant special requirements shall be determined with the supply center. When parallel operation is required, the automatic synchronization system with multiple power, phase and voltage shall be used first. 551.7.2 When the public power grid fails or the deviation of the voltage or frequency of the substitute power exceeds the allowable power supply ratio, there shall be protective measures to disconnect the generator from the public power grid. Type of protection expansion 551.7.3 When the voltage and rate of the public power grid exceed the protection action limit required by 551.7.2, measures should be taken to stop the generator from being connected to the public power grid. 551.7.4 Measures should be taken to isolate the generator from the public power grid: The public power grid department should set up isolation barriers at any time: 551.7.5 When the generator is put into operation as an alternative power source to the public power grid, the electrical equipment should comply with the provisions of 551.5. Appendix A (Informative Appendix) GD16B95.20—2003/IEC 60364-5-551:1994 Emergency References
TC Industrial plugs, sockets and couplers
: Part 3, Evaluation of performance characteristics
1EC 60364-3:1993
Electrical installations in buildings
IEC60364-5-551980 Building electrical installations Part 5: Selection and installation of electrical equipment Chapter 56, General supply1994 The existence of a neutral conductor in parallel with the increased voltage may cause false operation. Note: In a TN system, the neutral conductor of the equipment may be connected to the neutral conductor of the public power grid to prevent voltage disturbances caused by induced current such as lightning:
551. When the generating equipment may be operated in parallel with the public power grid, additional requirements for electrical shears and transformers are required. 551.7.1 When the generating equipment is operated in parallel with the public power grid, attention should be paid to the selection and certification of the generating equipment to be operated in parallel with the public power grid, and attention should be paid to avoiding adverse effects on the power supply network and other electrical equipment caused by power consumption, voltage changes, wave generation, two-phase unbalanced, automatic, parallel operation or voltage fluctuations: special requirements related to the supply center should be determined. When parallel operation is required, priority shall be given to the automatic synchronization system with multiple output rates, phase and voltage. 551.7.2 When a power outage occurs in the public power grid or the deviation of the voltage or frequency of the substitute power exceeds the allowable consumption ratio of the power supply, there should be protection measures to disconnect the generating equipment from the public power grid: the type and sensitivity of the protection expansion shall be related to the protection of the public power grid system and the notice of the supply core shall be obtained. 5517.3 When the voltage and standard rate of the public power grid exceed the protection action limit required by 5517.2, measures should be taken to prevent the generator from being connected to the public power grid. 551.7.4 Measures should be taken to isolate the generator from the public power grid: the public power grid department shall set up isolation barriers at any time: 551.7.5 When the generator is put into operation as an alternative power source to the public power grid, the electrical equipment shall comply with the provisions of 551.5. Appendix A (Informative Appendix) GD16B95.20—2003/IEC 60364-5-551:1994 Emergency Reference Documents TC Industrial plugs, sockets and couplers: Part 3, Evaluation of energy characteristics 1EC 60364-3:1993
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IEC60364-5-551980 Building Electrical Installations Part 5: Selection and Installation of Electrical Equipment Chapter 56: General Supply1994 The existence of a neutral conductor in parallel with the increased voltage may cause false operation. Note: In a TN system, the neutral conductor of the equipment may be connected to the neutral conductor of the public power grid to prevent voltage disturbances caused by induced current such as lightning:
551. When the generating equipment may be operated in parallel with the public power grid, additional requirements for electrical shears and transformers are required. 551.7.1 When the generating equipment is operated in parallel with the public power grid, attention should be paid to the selection and certification of the generating equipment to be operated in parallel with the public power grid, and attention should be paid to avoiding adverse effects on the power supply network and other electrical equipment caused by power consumption, voltage changes, wave generation, two-phase unbalanced, automatic, parallel operation or voltage fluctuations: special requirements related to the supply center should be determined. When parallel operation is required, priority shall be given to the automatic synchronization system with multiple output rates, phase and voltage. 551.7.2 When a power outage occurs in the public power grid or the deviation of the voltage or frequency of the substitute power exceeds the allowable consumption ratio of the power supply, there should be protection measures to disconnect the generating equipment from the public power grid: the type and sensitivity of the protection expansion shall be related to the protection of the public power grid system and the notice of the supply core shall be obtained. 5517.3 When the voltage and standard rate of the public power grid exceed the protection action limit required by 5517.2, measures should be taken to prevent the generator from being connected to the public power grid. 551.7.4 Measures should be taken to isolate the generator from the public power grid: the public power grid department shall set up isolation barriers at any time: 551.7.5 When the generator is put into operation as an alternative power source to the public power grid, the electrical equipment shall comply with the provisions of 551.5. Appendix A (Informative Appendix) GD16B95.20—2003/IEC 60364-5-551:1994 Emergency Reference Documents TC Industrial plugs, sockets and couplers: Part 3, Evaluation of energy characteristics 1EC 60364-3:1993
Reverse Building Electrical Installations
IEC60364-5-551980 Building Electrical Installations Part 5: Selection and Installation of Electrical Equipment Chapter 56: General Supply
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