Technical Articles

What is a BS EN 61008-1?

The BS EN 61008-1 is a technical standard that sets requirements for residual current operated circuit breakers with integral overcurrent protection. It is widely used in the electrical industry to ensure safety and proper functioning of electrical circuits and installations.

Understanding the Purpose

The primary purpose of the BS EN 61008-1 is to protect individuals from electric shock and prevent electrical fires caused by faults in the electrical system. It detects and interrupts abnormal current flows by monitoring the difference between the incoming current and the returning current, known as residual current.

Residual current can occur due to leakage in the system, both in equipment and human bodies, which is why these devices are specifically designed to detect and respond to such situations swiftly.

Main Requirements and Features

In order to comply with the BS EN 61008-1 standard, residual current operated circuit breakers must meet several specific requirements. These include:

Suitable tripping characteristics: The device should trip promptly when a fault occurs to minimize the risk of injury or damage.

Appropriate breaking capacity: It should be able to handle and interrupt the expected maximum current safely.

Operational reliability: The device must be reliable and perform accurately throughout its service life.

Immunity against external disturbances: The BS EN 61008-1 sets criteria to ensure the circuit breaker remains unaffected by external factors like electromagnetic interference.

Additionally, the standard also outlines other important features that the device should possess, such as clear markings, proper insulation, and protection against unauthorized access.

Benefits and Applications

The implementation of the BS EN 61008-1 standard has numerous benefits. It significantly reduces the risk of electric shock, protects electrical equipment and installations from damage, and prevents electrical fires caused by short circuits or faulty devices.

These residual current operated circuit breakers are extensively used in residential, commercial, and industrial environments. From homes and office buildings to factories and power plants, these devices play a crucial role in ensuring electrical safety and uninterrupted power supply.

In conclusion, the BS EN 61008-1 establishes requirements for residual current operated circuit breakers with integral overcurrent protection, offering comprehensive guidelines to ensure electrical safety and efficiency. Compliance with this standard is essential to protect individuals, prevent damage to electrical equipment, and minimize the risk of electrical fires.


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