Service continuity

Avoiding power supply outages helps you ensure the availability of your services to both customers and workers, boosting your profits.

The failure to guarantee service continuity in the tertiary sector, buildings or infrastructures entails financial losses. An unexpected outage due to a tripped electrical safeguard can result in a high financial cost, since it means no longer being able to offer a service to your customers, or facing a potential loss of supplies in facilities that process food, such as restaurants, supermarkets, bakeries or cafes.

To protect your facility correctly, you have to take into account the type of loads installed, since choosing the improper residual current protection can cause problems involving both spurious trips, constantly interrupting your service, and a failure to trip in the presence of a real leak, which can cause damage to people or to components in your facility.

Safety

Choosing the wrong residual current protection can cause a blockage in the presence of a real leak, putting people and the components of the facility at risk, and causing spurious trips if the leakage current is below the trip threshold.

Service continuity

Type-A residual current protection

Residual current protection devices designed to protect installations where there is a risk of AC current leakage. This is the most common type of protection in the tertiary sector, buildings and infrastructures, and is designed to protect lines with loads such as lighting, HVAC systems, furnaces and resistive loads.

Service continuity

Type-B residual current protection

Protective equipment designed to protect installations where there is a risk of DC current earth leakage or a combination of AC and DC current leakage.

Used as universal protection for HVAC systems, lifts, escalators, cold storage rooms, IT systems and UPS.

Service continuity

Type A and B residual current protection with automatic reclosing

These devices have a system that automatically reconnects residual current devices, avoiding human interaction and solving a problem caused by a one-time fault.

Type-a protection

Why install type-A ultra-immunised protection?

Despite being the most common type of protection, to avoid unwanted trips, we have to differentiate between those solutions with ultra-immunised systems and those without, since the choice of ultra-immunised protection device can prevent service outages that should not appear in normal conditions.

Devices without ultra-immunised systems can trip due to a leakage of more than 50% of their rating, and can cause a trip with a leakage current that is much lower than the trip limit. This means that, for example, a device that guarantees protection from 30 mA can trip with a 15 mA leakage current. In distribution panels with several lines, it is possible for the combined earth leakage current to be below 30 mA, and for the device to trip from 15 mA, a threshold well below the 30 mA required.

To prevent this effect, Circutor offers ultra-immunised devices that are guaranteed not to trip below 85% of the circuit breaker's rating. In other words, continuing with the example above, these devices will only trip with currents above 25 mA, without ever exceeding the 30 mA required by the protection system.

Ultra-immunised protection ensures service continuity when leaks occur due to harmonics up to 1 kHz, or due to a transient fault, such as that caused by an atmospheric discharge.

Type-B protection

When is type-B residual current protection recommended?

HVAC systems, lifts, escalators, cold storage rooms, IT systems and UPS use current with a DC component. The residual current protection required in this type of application will always be type B, as this ensures the protection of people and installations where the possibility of a DC or AC current leak exists.

Type-B protection is the one required by the manufacturers of these components to ensure the smooth operation of the residual current protection, and guarantee that it is properly tripped in the event of earth leakage. As mentioned previously, if these systems have the wrong protection devices, there could be spurious trips, affecting the level of service, or cause a blind zone, impeding a trip due to a real leak, which can directly affect the safety of the people or the physical components of the installation.

Automatic reclosing protection

How to ensure service continuity without having to travel to the facility

A residual current protection trip can have a significant financial impact on any installation if the line or equipment being protected is not constantly monitored by maintenance managers. To ensure service continuity in these cases, it is important to install devices that can reconnect automatically, since a trip can affect the operation of escalators, lifts, cold-storage rooms or computer systems.

These devices have a system that automatically reconnects residual current devices, avoiding human interaction and solving a problem caused by a spurious fault. This avoids the need to dispatch a technician to the electrical panel to reset the device, saving time and money.

Circutor has a wide range of type-A and type-B solutions with automatic reclosing to guarantee the proper response to earth leakage at any time.

Coverage

Type-A residual current protection

Solutions for AC and pulsing leaks

Type-B residual current protection

Solutions for DC and/or AC and pulsing leaks

Type-A residual current leakage protection with automatic reclosing

Solutions for AC and pulsing current leaks with automatic reclosing

Type-B residual current leakage protection with automatic reclosing

Solutions for DC and/or AC and pulsing leaks with automatic reclosing