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Fast and simple testing of safety sockets

The new socket tester, BENNING SDT 1, is successful thanks to its simple operation and high user-friendliness, with active PE fault detection possible by easy finger contact.

Easy handling, compact form
Easy handling, compact form

A professional approach is top priority when testing safety sockets. Carelessness in the daily routine can be responsible for installation errors, which cannot be detected immediately by the user. For instance, an electric cable current conductor springing off the contacts during insertion in the socket cavity could be very dangerous or an incorrectly installed or subsequently manipulated electrical outlet can lead to great personal danger and property damage.

But the necessary VDE installation testers are not always available for the proper testing of electrical equipment. In these cases, it is more important and practical to be able to fall back on a reliable electrical outlet tester, which enables not only qualified electricians but also “amateurs" to effect fast and easy checking without compromising safety.
The new socket tester BENNING SDT 1 has complied with these requirements since September 2016. Also, the existing test, measurement and protection equipment program is extended with a socket tester for the easy checking of the correct connection of 230 V safety sockets, cable reels and extension cables. All of this comes with the ease of use, speed and secure display, providing a reliable indication of the equipment’s state, which is representative for all BENNING testing instruments.

Socket with wiring errors: Risk of death! Outer conductor (L) and protective earth (PE) have been swapped.
Socket with wiring errors: Risk of death! Outer conductor (L) and protective earth (PE) have been swapped.


Manufactured for a nominal voltage range of 230 V and 50–60 Hz, the BENNING SDT 1 socket tester can be used in all countries that use connector type E+F (CEE 7/7); that is most European countries but excepting Germany. Together with a custom adapter for CEE 230 V outlets, the tester can be used on containers, caravans and boats, replacing the need for batteries that need recharging or replacing every few weeks. Plus, the power supply is always via the test object, which ensures maximum tester availability.

The high flexibility of the BENNING SDT 1 is apparent not only in its application areas but also its user groups. On the one hand are the experienced electricians who consider the new socket tester BENNING a very useful and practical measuring instrument, mainly when the “preliminary” measurement of an outlet must be performed; on the other hand, electrical work contractors, such as estate management, can have their caretakers quickly check the work performed by electric companies, observing that “Trust is good, control is better”.

Easier and faster testing process

Clearly, the BENNING SDT 1 is a worthwhile purchase for electricians, but anyone who has electrotechnical training (EuPs) or even laymen can easily use the socket tester to perform a quick test, whether when buying a house, during a house tour or in their own home. The simplicity of use and clear LED diagnostic table allow a simple and rapid test procedure to be carried out anywhere, without the need for any specialist electrical knowledge. This does not replace a review by an electrician but it is enough for a first basic test of the sockets.

Outlet installed correctly - finger contact checks PE for danger of electric shock.
Outlet installed correctly - finger contact checks PE for danger of electric shock.

Reliable error detection

The BENNING SDT 1 socket tester immediately detects wiring errors, such as missing PE (PE), neutral (N) and outer conductor (L) or the lethal crossover of phase and protective conductor. It clearly shows the user the current state of the outlet via three red LED diodes and a LC display. For this reason it is not necessary to check how the tester is inserted.

A comprehensive and clearly arranged status table on the front panel also provides information about the correct connection or the type of error present in the installation at the electrical outlet.

Active protective conductor test

A very special feature of the outlet tester is the active protective conductor test, which is triggered by a simple touch. The finger-touch electrode warns the user of the presence of a dangerous contact voltage (greater than 50 V) on the protective conductor connection of the electrical outlet. A related icon also appears on the LCD display.
In addition, the BENNING SDT 1 socket tester provides a button to trigger an upstream residual current protection device (FI/RCD) functional test with a rated residual current of the switch up to I ∆n 30 mA. This does not replace the safety control of an electrical installation according to VDE standards, in which the tripping time and tripping current are defined; however, it provides an initial verification that the protective earth is connected and capable of carrying a current in case of failure. This is the equivalent of an FI quick test without a VDE base as, for example, must be done regularly on building site main switchboxes.
It is important to note that should the BENNING SDT 1 socket tester detect an error, a lay user should act immediately by securing the danger area and consulting an experienced professional. Only they can determine the exact cause of the error using a professional VDE installation tester, which meets the requirements of DIN VDE 0413/EN 61557, and fix the problem.

Experience BENNING products live

At a time to be confirmed, the BENNING SDT 1 will be available at electrical wholesalers, tool retailers, and specialist construction outlets. Electrical exhibitions and trade partner events will also provide opportunities to see the socket tester in action and discover its ease of use and user friendliness for yourself.

Further Information

author/contact: Tobias Enck
telephone: +49 2871 93 111

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