Protection from residual currents More safety for humans, plants and assets 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.

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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. Corel drawings x3 rapidshare. 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. RCBOs (Residual current operated circuit breakers with overcurrent protection) combine residual current detection and overvoltage protection in a single device.

The new 5SV1 RCBOs for the first time combine residual current and overload protection in one modular width (MW). This enables more protection devices to be installed in the distribution board and existing installations to be easily expanded with new protection functions in a space-saving solution. The protection devices can also be connected in a - thus offering personal, line and preventive fire protection. • Super-resistent K with an impulse withstand strength greater than 3 kA will prevent unwanted power disconnections by briefly delaying the tripping of the RCCB. This avoids unnecessary triggering and thus any consequential system disruptions, e.g. If pulsed leakage current develops, such as when capacitors are activated.

• Selective S with an impulse withstand strength greater than 5 kA, uses time-delayed tripping and staggered tripping times and rated residual currents to selectively disconnect individual system components. • Patented SIGRES version have been designed to provide protection under unusual conditions, like gas or moisture in the ambient air, and offer maximum safety and a long service life thanks to integrated condensation protection.