Below you will find questions and answers concerning general topics or specific product groups. Click on a category to view the related questions and answers.

Yes, there are. We can offer some of the most important system components for a certain period of time. These include, for example, DKG 20, DRM 4 and DRM 8, DSS 2/4/8U, etc. How long stocks last naturally depends on demand, but we expect to have stock available until about 2023. Carlo Gavazzi also sells compatible products, such as temperature sensors, handheld encoders, etc.
Yes, they do. The tender texts can be found on our website on the specific page for the product in question. Our product catalogue at www.ausschreiben.de also contains tender texts.
You are probably trying to communicate with the channel generator using an unsuitable or incorrectly configured USB converter. In principle there are only two manufacturers of USB–serial communication chips: Prolific and FTDI. Unfortunately the drivers for the Prolific chip cannot be configured further and in more detail, unlike the drivers for the FTDI chip. In this case you can reduce the waiting time before transmission to a value of max. 10 ms (see linked documentation). Unfortunately it is not always possible to identify which chip is used in all conventional products, so you may need to ask the distributor or manufacturer.
No, the installation contactors do not have forcibly guided contacts.
The fixed price for the first DRCA measurement is EUR 480, and each additional measurement in the system costs EUR 90. These prices do not include VAT.
The DLS 6 miniature circuit-breakers may be operated with direct voltage up to 60 V (single terminal) or up to 125 V (two-terminal).
Yes, the DLS 6 can be operated using other rated frequencies. Does this change the tripping factor over the frequency range though? The tripping factors over the frequency range are: 1.5 for DC; 1.0 at 50 Hz; 1.1 at 100 Hz; 1.2 at 200 Hz; 1.3 at 300 Hz and 1.4 at 400 Hz.
The use of type AC residual current circuit-breakers is not permitted in Germany. These products are purely intended for export. Installation regulations VDE 0100-510 and VDE 0100-410, from 1983, were the first regulations to stipulate that RCDs in use had to be sensitive to both AC residual currents and to pulsating DC residual currents (now known as Type A). There was a transition period until 1985 for installations that were being planned or constructed; since then use of Type AC residual current circuit-breakers has no longer been permitted in Germany.
There is no definition of the term ‘existing protection’ in the relevant DIN VDE standards, or in the ‘International Electrotechnical Vocabulary’ (IEV). The term originally comes from public-sector building regulations and describes a circumstance in which the original form of an approval continues to apply even if newer laws impose more stringent requirements when it comes to gaining the same approval. As a general rule, the latest installation regulations apply to new installations. For example, a residual current circuit-breaker with a rated residual current ≤ 30 mA is the minimum requirement for a new socket (up to 20 A). A professional electrician should carry out a safety assessment to determine whether it is necessary to replace the existing installation or not. This in turn will determine whether the installation has any ‘existing protection’ at all. To get an answer, it is important first to know the date on which the electrical installation was installed and what installation regulations were in force at the time. Modifications required by the standards and their time limits should then be known. In the event that the electrical installation was designed in line with the regulations of the time, it must be clarified whether or not adjustments to meet current requirements are required for other reasons. The bottom line, however, is that safety, reliability and use of the electrical installation always take priority over the existing protection.
No, unfortunately that won’t be possible; there are major differences between the design of the blue toggle and the design of the black toggle. The residual current circuit-breaker would have to be replaced with an up-to-date device with a blue toggle. It would then be possible to connect the two devices.
No. According to the standard, automatic restart is only permitted in areas where only trained electricians have access.
Our DFS 4 A EV is a switch with residual current characteristic A, and an additional DC residual current detection function that restricts DC faults to max. 6 mA. Detection of sinusoidal AC currents and pulsating DC residual currents is mains-voltage-independent; the DC additional function is voltage-dependent. The DFS 4 A EV are designed specifically for use in charging stations for electric vehicles. They are not permitted for protecting installations in which electronic equipment may cause residual currents with frequencies not equal to 50 Hz. AC-DC sensitive residual current circuit-breakers of type B or B+, in accordance with DIN VDE 0100 installation regulations, must be used in this case.
Short-time delayed residual current circuit-breakers (KV) can help solve this problem. These switches have a non-response lag time of 10 ms and are more resistant to surge currents, which means that undesired trips can be avoided in most cases. This does not impede the additional protection (personal protection). As such, it is then possible to replace each ‘standard switch’ with a short-time delayed residual current circuit-breaker.
Due to their design, induction hobs can generate smooth DC residual currents or residual currents with frequencies not equal to 50 Hz. They therefore fall under electronic equipment that should be protected using a type B or B+ residual current circuit-breaker. Although at present neither the standards nor the hob manufacturers prescribe it, this approach is the best solution from a technical standpoint and is certainly our recommendation. Contact the hob manufacturer in case of doubt.
The switch toggle of devices from the DFS 2 and DFS 4 series is fitted with a reset function. The switch toggle position indicates whether the residual current circuit-breaker has been switched off due to a fault (centre position) or by hand (zero position). To switch on, the toggle must always be moved to the zero position; only then can the residual current circuit-breaker be reset.
Based on the total current principle, this will work for all switches in the DFS series with regard to residual current detection. To ensure the test key functions correctly, however, the operating voltage range of the test circuit must be observed (this can be found in the data sheet). As the test key resistance for an N-left device is between two phases, the voltage range is greater than with N-right devices for which the test key resistance is between the neutral conductor and phase.
No, the float switches are not suitable for use in extra-low voltage or direct voltage systems.
No, the floating switches are not flameproof. They must be sheathed in a special jacket, if necessary.
No, the floating switches are not suitable for use in drinking water due to the properties of their connection cables.