Working safely with electrical energy sources with Electrical locking devices

• Posted on 4 December 2024
• By Birgit
• 0

The energy source: electricity  Electricity is the most common source of energy. and working with electricity involves significant risks, which can cause damage in two ways:   Mechanical danger: When electricity drives the moving parts of machinery, these parts can cause injuries. Electrical hazards: When electricity feeds the conductors of machines, they can become live. This is especially dangerous for exposed conductors with a voltage above 50 volts (both AC and DC)   So safely isolating electrical power sources is essential. This is where electrical locking devices come in, specially designed to prevent re-energisation during lockout-tagout operations.

What are Electrical locking devices?

Electrical interlocks are used to effectively isolate electrical energy sources during maintenance or repair work. Using an electric interlock in combination with a safety padlock prevents the power source from being switched back on until the work is safely completed.

Specific applications and limitations

It is important to distinguish between different types of electrical interlocks. Some interlocks, such as those for push buttons and emergency stops, isolate only the control current (the control signals of a machine) and not the main current (the primary energy source).

These control power interlocks are not covered by the official lockout-tagout rules, but by the machinery directive guidelines. This means they are useful for certain safety measures, but should not be used as a substitute for fully isolating a power source.

In short, control power interlocks can provide additional protection, but lockout tagout operations require complete isolation of the main power source with appropriate lockout equipment.

Equipment and safety

Electrical locking devices are designed with safety as a priority. As far as possible, they are made of non-conductive materials to minimise the risk of electric shock. It is recommended to combine these latches with a non-conductive security padlock, ideally with a plastic shackle. 

Universal solutions for circuit breakers

Thanks to the introduction of universal interlocks for circuit breakers, it is now possible to significantly reduce the number of interlocks required for electrical hazards. This makes interlocking simpler and more efficient, while maintaining safety.

Advice and support

Ensuring safety in electrical work requires the right products and a well-thought-out approach. Our specialists are at your service with no-obligation advice, a quotation or an on-site appointment. Contact us today and find out how we can help create a safe working environment.