Page 2 - Doepke_5961002_diz2025_3_en_digital

page 2 ––– DIZ | Doepke-INfo-ZeItuNg No 3 | September 2025

International guests at Doepke – welcome to Norden!

Our global partnerships are becoming an (Hateha) and Hungary (Kamleithner) were a company that uses our type B RCBOs
increasingly important part of our daily also guests in Norden. Learning about new in its charging stations.
work. As we intensify our international sales products, planning joint market activities, Last but not least, representatives from
activities, establish new contacts and tap into taking a look at our production facilities and
new markets, the number of visitors from all doing some sightseeing in East Frisia were Walther-Werke France took the opportunity
to kick off their visit with a traditional East
over the world is also growing. A brief look at among the highlights of the varied programme Frisian tea party – a successful start to a
the first half of 2025 shows that we had a lot for the trip.
going on! productive exchange.
We were also visited by some of our more
Several employees of our US partner Altech recent partners, namely our Turkish distribu- Each visit is a testament to a successful
working partnership and another step on
took advantage of their visit to the Hannover tor Novsen and Lidalco from Sweden. In fact, our path to international growth.
Messe trade fair to stop off in East Frisia. Lidalco travelled together with PhaseBox,
Not only has Altech been an importer of our
products for many years, it also represents
Doepke in many matters locally, acting as an
extended arm of our company on the North
American market. In addition to a tour of the
factory, the main focus was on discussing joint
projects – with plenty of enthusiasm and good
ideas for the future.
Employees from our long-standing distribu-
tors in Switzerland (Demelectric), Belgium
(DeMaegd), Austria (Stenna), the Netherlands

“All it takes is a moment”

Short-time delayed residual current circuit-breakers for safety and system availability
Residual current circuit-breakers need to As a result, the circuit-breaker trips. Put in technical terms, because they feature
trip immediately when a residual current This can become a problem if it is not possible a response delay, short-time delayed residual
occurs. But what does “immediately” mean? to switch the power back on immediately – current circuit-breakers only respond to
The maximum permissible time is defined residual currents that last longer than a
in the relevant standard (product standard for example in the case of remote installations, half-period of the power frequency.
prolonged absences or sensitive loads.
VDE 0664-10). Depending on the magnitude of Compliance with the tripping times required
the residual current, the permissible switch-off And in electrical installations with LED lights,
times range between 40 and 300 milliseconds. fluorescent lamps, strip lights, computer sys- by the standard is therefore not a problem,
meaning that short-time delayed residual
tems, solar power systems or a large number of
However, there are cases where although switched-mode power supplies, pulsed surge current circuit-breakers can be used without
“immediately” has to be within the switch-off currents may occur when switching on, which any issues in place of standard breakers.
times required by the standard, it may be sen-
sible to wait a short while. One such example is can lead to (false) tripping of conventional Our Type F RCCB and the AC-DC sen-
residual current circuit-breakers.
sitive Type B are short-time delayed and
during storms: lightning strikes that are some lightning-resistant as standard. As for Type A,
distance away may result in short-term surges These problems can be avoided using short-
and voltage peaks in the installation. These give time delayed residual current circuit-breakers. which is sensitive to pulsating and alternating
currents, the short-time delayed “KV” version
rise to transient (temporary) leakage currents, As the name suggests, they wait briefly when can be selected.
which a residual current circuit-breaker cannot a residual current occurs. If it is still present
differentiate from an actual residual current. after 10 milliseconds, then the RCCB trips.