IEC/EN 60947-4-1 deals with the specifications of electric motor contactors and starters

using protective relays and the principles and It determines their performance, safety and quality requirements. This standard applies to low voltage equipment and includes the following: 1. **Technical Specifications**: This standard includes various technical specifications such as working voltage, rated current, disconnecting and connecting power, and response time. It also specifies parameters such as mechanical and electrical durability, the ability to withstand short-circuit currents, etc. 2. **Tests and Approvals**: The equipment must be subjected to various tests to ensure that it performs in accordance with the requirements of the standard. These tests include functional tests, durability, safety and resistance to environmental conditions. 3. **Safety and Reliability**: Standard 60947-4-1 ensures that protective equipment such as relays and contactors have sufficient safety to prevent unwanted accidents. This includes proper design to prevent dangerous failures as well as high reliability in operation. As for ABB relays, this company, as one of the leading manufacturers of electrical equipment, offers a variety of products in line with this standard. ABB protection relays, manufactured in accordance with IEC/EN 60947-4-1, are of high quality and safety and are used in various industrial applications, including the protection of electric motors. These relays usually have features such as: - **Protection against overload**: by detecting excessive currents, the relay automatically cuts off the circuit to prevent damage to the equipment. - **Customizable settings**: It is possible to fine-tune various parameters such as response time and cut-off current. - **High Durability**: These relays are designed to work under harsh industrial and environmental conditions. By using ABB relays that are manufactured in accordance with the IEC/EN 60947-4-1 standard, it is possible to ensure the safe and reliable operation of electrical equipment.