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notifiable accidents involving electricity
nearly 90% of electrical accidents occur in the low-voltage range
In homes, on construction sites, in companies
5SM3 universal current-sensitive RCCBs SIQUENCE, type B/B+ reliably detect residual currents in both AC and DC networks. Special feature: the integrated condensation protection ensures maximum safety and a long service life, even under harsh conditions such as gases or moisture in the ambient air.
The inspection period has therefore been extended to 24 months, especially for the 5SM3 RCCB, type B/B+ – and you benefit from the reduced time and costs that this involves.
Protection from residual currents
The number of electrical consumers in residential homes and commercial buildings has increased significantly in recent decades. The latest electrical devices often have quite different characteristics in terms of current consumption than earlier devices, due to frequency converters in washing machines, for example, or switched-mode power supply units in TVs, PCs or LED lights. There are also decentralized power producers like photovoltaic systems or charging devices for electric vehicles. All of this requires new protection strategies for electrical installations. This also includes appropriate residual current protection devices or residual current circuit breakers that will cut the current immediately and safely in the event of a fault.
Wiring errors, insulation faults, defective devices or faulty work on electrical systems can trigger dangerous residual currents – and cause accidents or electrical fires as a consequence. Residual current protective devices (RCDs) can prevent these from happening. They protect against dangerous shock currents when conductive objects that are under tension are touched, either directly or indirectly. Residual current operated circuit breakers (RCCBs) quickly and safely cut the power to the monitored circuit if a set differential current is exceeded. For many areas of application, the installation of RCCBs with rated residual currents no greater than 30 mA is mandatory in new buildings: for example, since 1984 in rooms with a bath or shower, and since 2007, additionally, for all socket-outlet circuits with a rated current of up to 20 A that are intended for use by non-professionals and otherwise for general use.
Our SENTRON portfolio of residual current protective devices (RCDs) includes basic residual current operated circuit breakers (RCCBs) with no integrated overvoltage protection, combined RCBO with residual current detection and overvoltage protection in a single device, and, as an alternative, RC unit that can be fitted to miniature circuit breakers (MCBs). All RCDs are available in different types and versions suited to detecting different types of residual current and different areas of application.
Downloads and Support
Here you will find important information, documents, and addresses relating to low-voltage power distribution and electrical installation technology.
Protection for construction power distributors using frequency converters with residual current circuit breakers
Improved safety for personnel and plant
Uninterrupted operation on the construction site guaranteed
Learn, choose, and then order: detailed technical information on all residual current protective devices is available in the Industry Mall. You’re just a few clicks away from your personalized solution for residual currents.