The standard EN60947 is a technical standard used in the electrical industry to ensure the safety and performance of low-voltage switchgear and controlgear. This standard, developed by the International Electrotechnical Commission (IEC), sets out specific requirements and test criteria for various electrical components and devices to ensure they meet quality standards and perform reliably in different operating conditions.
Scope of the standard
The scope of standard EN60947 covers a wide range of electrical equipment used in industrial, commercial, and residential applications. It includes but is not limited to circuit breakers, switches, contactors, relays, motor starters, disconnectors, and control devices. The standard applies to products with rated voltages up to 1000V AC or 1500V DC.
Key requirements
Standard EN60947 outlines several key requirements that electrical devices must meet to comply with safety and performance standards.
1. Electrical and mechanical endurance: The standard specifies the number of operations that a device should be able to withstand without failure. This ensures the reliability and durability of the electrical components under normal operating conditions.
2. Temperature rise limits: The standard establishes temperature limits to prevent overheating of electrical devices during operation, which can lead to premature failure or even fire hazards.
3. Clearances and creepage distances: To minimize the risk of electrical accidents, the standard defines the minimum distances that should be maintained between conductive parts within a device or between different devices, ensuring proper insulation and preventing leakage of current.
4. Short-circuit withstand capability: The standard requires devices to withstand high fault currents for a specified duration without damage. This is crucial for ensuring the safety of the electrical installation and the surrounding equipment.
5. Protection against ingress of solid objects and water: EN60947 specifies the level of protection (IP code) required for electrical devices based on their intended application and environment. It ensures that the devices are adequately protected against dust, dirt, moisture, and other external factors that could impair performance or cause hazards.
Compliance and certification
In order to comply with standard EN60947, manufacturers need to design and manufacture electrical devices according to its specifications. Compliance with this standard is typically validated through independent testing and certification by accredited laboratories or certification bodies. Once a device has been certified, it can bear the appropriate conformity markings, such as the CE mark in Europe.
In conclusion, standard EN60947 plays a crucial role in ensuring the safety, reliability, and performance of low-voltage switchgear and controlgear used in various applications. Compliance with this standard not only ensures the protection of individuals and property but also enhances confidence in the quality of electrical devices.
Nina She