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DEHNrapid ® LSA
Lightning current / surge arrester
SPDs for LSA Technology
1 2 3 4 5 6 7 8 9 0
With an appropriate earthing frame, the fine limiting DEHNrapid LSA single-pair
surge arresters can be plugged directly into the DRL plug-in SPD
block or optionally into LSA disconnection blocks. The decoupling impedances
integrated in the protective plugs allow energy coordination with
the DRL plug-in SPD block irrespective of the cable length. The single-pair
plug also allows partial equipment of LSA disconnection blocks and protective
plugs with different circuits or nominal voltages can be plugged
into one block.
DRL protective plugs with earthing frame
DRL combined lightning current and
surge arrester
The assembled unit of plug-in
SPD block, earthing frame and
protective plug (combined lightning
current and surge arrester)
can be removed and plugged in
as a complete unit. The combined
lightning current and
surge arrester complies with SPD
class GO.
DRL 10 B 180...
a b a’b’
a a'
TL2 10DA LSA
Disconnection block function
a
a b a’b’
a'
The plug-in SPD block incorporates disconnection contacts that are compatible
with the disconnection block. A measuring or disconnection
adapter can be plugged into the DRL in the same way as a disconnection
block to ensure protection even during maintenance operation.
To protect the gas discharge tube from a possible burn-off due to overcurrent,
a fail-safe function short-circuits the lines to earth. In the event
of an overcurrent, the disconnecting solder between the spring and the
arrester melts, the lines are short-circuited and the temperature-sensitive
colour on the spring changes from light pink to dark purple, indicating
that the arrester must be replaced.
DRL 10 B 180 FSD
fail-safe
light pink
fail-safe
dark purple
ok
replace
Replacement of a faulty gas discharge tube
new
232 www.dehn.de