What is standard EN 60947?

The EN 60947 standard is a widely recognized and globally accepted set of specifications for low-voltage switchgear and controlgear. It provides guidelines and requirements for the design, performance, testing, and marking of these electrical devices. This article aims to provide a thorough technical of the EN 60947 standard.

Scope and Purpose

The standard EN 60947 covers a wide range of low-voltage switchgear and controlgear products, including circuit-breakers, contactors, motor starters, and switches. Its primary purpose is to ensure that these devices are safe, reliable, and efficient in their operation. The standard sets out minimum requirements for aspects such as mechanical endurance, dielectric properties, temperature rise limits, and short-circuit withstand strength.

Main Requirements

One of the key requirements of EN 60947 is the compliance with certain technical parameters and tests. These include:

- Breaking capacity: Ensuring that the devices can safely interrupt the flow of current under different fault conditions.

- Insulation properties: Verifying the insulation materials used in the construction of these devices can withstand specified voltages without breakdown.

- Operating conditions: Defining the environmental conditions, such as temperature and humidity, under which the devices should be able to operate effectively.

- Mechanical durability: Assessing the number of mechanical operations the devices can withstand before their performance is affected.

- Electrical endurance: Evaluating the number of electrical operations the devices can endure without significant deterioration.

Compliance and Certification

In order to comply with EN 60947, manufacturers must ensure that their products meet all the relevant requirements of the standard. Compliance can be demonstrated through various means, including type testing and factory production control. Once compliant, products may receive the appropriate certification marks or labels, indicating their conformity with EN 60947.

In summary, the EN 60947 standard plays a crucial role in ensuring the safety and performance of low-voltage switchgear and controlgear. Compliance with this standard not only enhances the reliability of electrical devices but also contributes to overall system safety. By following these specifications, manufacturers can deliver high-quality products that meet the expectations and requirements of customers worldwide.