Power relays are electrical devices used to control circuits, widely used in industrial automation, household appliances, transportation, and other fields. Their main function is to control large currents with small currents, thereby achieving switch control of electrical equipment. Power relays play a crucial role in electrical equipment, effectively improving the safety and reliability of devices. Therefore, it is important to establish and adhere to relevant product standards.
The working principle of power relays is based on electromagnetic induction. When a voltage is applied to the input terminal, the electromagnetic coil inside the relay generates a magnetic field, attracting the moving contact to make contact with the stationary contact, thereby closing the circuit. Conversely, when the input voltage disappears, the magnetic field dissipates, the moving contact resets, and the circuit opens.
The main functions of power relays include:
Switch control: controlling large currents with small currents.
Protection function: automatically cutting off the circuit in case of overload, short circuit, etc., to protect the equipment.
Signal conversion: converting input signals into output signals to achieve interconnection between different circuits.
Power relays can be classified according to different standards, common types include:
Electromagnetic relays: work based on electromagnetic principles, suitable for most applications.
Solid-state relays: use semiconductor components, no mechanical moving parts, suitable for applications with high frequency and high reliability requirements.
Thermal relays: mainly used for overload protection of motors.
Product standards refer to the technical requirements and specifications that should be followed in the process of product design, production, inspection, and use. For power relays, the establishment of product standards not only helps ensure the safety and reliability of products but also promotes fair competition in the market and protects consumer rights.
Currently, international and domestic standardization work for power relays has made certain progress. International standards are mainly formulated by organizations such as IEC, UL, EN, while domestic standards are managed by the National Standardization Management Committee and industry associations.
IEC 61810: This standard specifies the basic requirements for relays, including performance, test methods, and markings, to ensure the reliability of relays in various environments.
IEC 60947: This standard covers the requirements for low-voltage switchgear and controlgear, applicable to the design and application of power relays.
UL 508: This standard applies to industrial control equipment, specifying the safety requirements and test methods for power relays.
UL 873: This standard is mainly for temperature controllers, involving the requirements of power relays in temperature control applications.
EN 61810: This standard is similar to IEC 61810, focusing on the safety requirements of relays to ensure product safety during use.
GB 14048.4: This standard specifies the requirements for low-voltage switchgear and controlgear, applicable to the design and production of power relays.
GB/T 14048.5: This standard involves the basic technical requirements of relays, including performance, test methods, and markings.
JB/T 10000: This standard specifies the technical conditions for power relays, including materials, structure, performance, and test methods.
The testing items for power relays mainly include:
Insulation resistance test: to ensure the insulation performance of the relay in working condition, to prevent leakage.
Dielectric strength test: to test the withstand capacity of the relay under high voltage, ensuring its safety.
Mechanical life and electrical life test: to evaluate the reliability and stability of the relay in long-term use.
Certification bodies are responsible for testing and certifying power relays to ensure compliance with relevant standards. Major certification bodies include:
TÜV: German Technical Inspection Association, providing certification services for a variety of products.
SGS: Swiss General Notary Office, a leading global inspection, verification, testing, and certification body.
Quality control is crucial in the production process of power relays, including:
Selection and inspection of raw materials: ensuring that the materials used meet standard requirements, avoiding quality hazards due to material issues.
Standardization of production processes: establishing standardized production processes to ensure the quality control of each link.
Finished product inspection is an important step to ensure the quality of power relays, including:
Factory inspection standards: conducting comprehensive inspections of finished products according to relevant standards to ensure their performance and safety.
Quality traceability system: establishing a sound quality traceability system to ensure the traceability of each product's production process.
With technological advancements, the technology of power relays is also constantly evolving. Main trends include:
Trend towards intelligence and digitization: the emergence of smart power relays makes equipment control more flexible and efficient.
Environmental protection and energy efficiency requirements: considering environmental protection and energy efficiency factors more in the design and production process, promoting the development of green products.
The demand for power relays in different industries is constantly changing, mainly reflected in:
Industrial automation: with the advancement of Industry 4.0, the application of power relays in automated equipment is becoming more widespread.
Home appliance industry: the rise of smart homes is driving the application of power relays in household appliances.
As an important component of electrical equipment, the establishment and implementation of product standards for power relays are crucial to ensuring the safety and reliability of devices. With technological advancements and changes in market demand, the standardization work for power relays will continue to evolve. In the future, the industry should continue to strengthen the formulation and implementation of standards, promote technological innovation and market application of power relays, and provide strong guarantees for the safe operation of electrical equipment.
1. IEC 61810: Relays - Part 1: General rules.
2. UL 508: Standard for Industrial Control Equipment.
3. GB 14048.4: Low-voltage switchgear and controlgear - Part 4: Contactors and motor starters.
4. JB/T 10000: Technical conditions for power relays.
5. Relevant industry standards and technical literature.
Power relays are electrical devices used to control circuits, widely used in industrial automation, household appliances, transportation, and other fields. Their main function is to control large currents with small currents, thereby achieving switch control of electrical equipment. Power relays play a crucial role in electrical equipment, effectively improving the safety and reliability of devices. Therefore, it is important to establish and adhere to relevant product standards.
The working principle of power relays is based on electromagnetic induction. When a voltage is applied to the input terminal, the electromagnetic coil inside the relay generates a magnetic field, attracting the moving contact to make contact with the stationary contact, thereby closing the circuit. Conversely, when the input voltage disappears, the magnetic field dissipates, the moving contact resets, and the circuit opens.
The main functions of power relays include:
Switch control: controlling large currents with small currents.
Protection function: automatically cutting off the circuit in case of overload, short circuit, etc., to protect the equipment.
Signal conversion: converting input signals into output signals to achieve interconnection between different circuits.
Power relays can be classified according to different standards, common types include:
Electromagnetic relays: work based on electromagnetic principles, suitable for most applications.
Solid-state relays: use semiconductor components, no mechanical moving parts, suitable for applications with high frequency and high reliability requirements.
Thermal relays: mainly used for overload protection of motors.
Product standards refer to the technical requirements and specifications that should be followed in the process of product design, production, inspection, and use. For power relays, the establishment of product standards not only helps ensure the safety and reliability of products but also promotes fair competition in the market and protects consumer rights.
Currently, international and domestic standardization work for power relays has made certain progress. International standards are mainly formulated by organizations such as IEC, UL, EN, while domestic standards are managed by the National Standardization Management Committee and industry associations.
IEC 61810: This standard specifies the basic requirements for relays, including performance, test methods, and markings, to ensure the reliability of relays in various environments.
IEC 60947: This standard covers the requirements for low-voltage switchgear and controlgear, applicable to the design and application of power relays.
UL 508: This standard applies to industrial control equipment, specifying the safety requirements and test methods for power relays.
UL 873: This standard is mainly for temperature controllers, involving the requirements of power relays in temperature control applications.
EN 61810: This standard is similar to IEC 61810, focusing on the safety requirements of relays to ensure product safety during use.
GB 14048.4: This standard specifies the requirements for low-voltage switchgear and controlgear, applicable to the design and production of power relays.
GB/T 14048.5: This standard involves the basic technical requirements of relays, including performance, test methods, and markings.
JB/T 10000: This standard specifies the technical conditions for power relays, including materials, structure, performance, and test methods.
The testing items for power relays mainly include:
Insulation resistance test: to ensure the insulation performance of the relay in working condition, to prevent leakage.
Dielectric strength test: to test the withstand capacity of the relay under high voltage, ensuring its safety.
Mechanical life and electrical life test: to evaluate the reliability and stability of the relay in long-term use.
Certification bodies are responsible for testing and certifying power relays to ensure compliance with relevant standards. Major certification bodies include:
TÜV: German Technical Inspection Association, providing certification services for a variety of products.
SGS: Swiss General Notary Office, a leading global inspection, verification, testing, and certification body.
Quality control is crucial in the production process of power relays, including:
Selection and inspection of raw materials: ensuring that the materials used meet standard requirements, avoiding quality hazards due to material issues.
Standardization of production processes: establishing standardized production processes to ensure the quality control of each link.
Finished product inspection is an important step to ensure the quality of power relays, including:
Factory inspection standards: conducting comprehensive inspections of finished products according to relevant standards to ensure their performance and safety.
Quality traceability system: establishing a sound quality traceability system to ensure the traceability of each product's production process.
With technological advancements, the technology of power relays is also constantly evolving. Main trends include:
Trend towards intelligence and digitization: the emergence of smart power relays makes equipment control more flexible and efficient.
Environmental protection and energy efficiency requirements: considering environmental protection and energy efficiency factors more in the design and production process, promoting the development of green products.
The demand for power relays in different industries is constantly changing, mainly reflected in:
Industrial automation: with the advancement of Industry 4.0, the application of power relays in automated equipment is becoming more widespread.
Home appliance industry: the rise of smart homes is driving the application of power relays in household appliances.
As an important component of electrical equipment, the establishment and implementation of product standards for power relays are crucial to ensuring the safety and reliability of devices. With technological advancements and changes in market demand, the standardization work for power relays will continue to evolve. In the future, the industry should continue to strengthen the formulation and implementation of standards, promote technological innovation and market application of power relays, and provide strong guarantees for the safe operation of electrical equipment.
1. IEC 61810: Relays - Part 1: General rules.
2. UL 508: Standard for Industrial Control Equipment.
3. GB 14048.4: Low-voltage switchgear and controlgear - Part 4: Contactors and motor starters.
4. JB/T 10000: Technical conditions for power relays.
5. Relevant industry standards and technical literature.
