Page 14 - Surge-Protection-E_0.pdf

Definition of Symbols

Symbol Definition

Installation instructions, see www.dehn-international.com
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Symbol Definition
ACI technology
A further development of CI technology, ACI technology consists of a switch/spark gap combination connected in series with a heavy-

Advance d Circuit Interruption duty varistor. This ensures the simple design and safe operation of the surge protective device. Other features are safe dimensioning,
ACI
Improved SPD Safety
TOV withstand, a connection cross-section of only 6 mm² Cu and zero leakage current. Surge arresters with ACI technology offer
maximum safety and system availability.
Integrated backup fuse
Reduced space requirements, lower installation costs, faster wiring and shorter connecting cable lengths are clear advantages of this
concept used for the DEHNvenCI, DEHNbloc Maxi S, DEHNguard … CI and V(A) NH product series.
SCI technology
The patented SCI technology with active arc extinction allows to actively, quickly and safely extinguish a possible switching arc in case
of overload. The PV fuse integrated in the short-circuit path trips immediately after the arc has been extinguished, thus ensuring safe
electrical isolation (interruption). Consequently, all PV arresters from DEHN combine surge protection, fire protection and personal
protection in a single device.
Wave breaker function
If a spark-gap-based type 1 arrester is used, the total current flows through the type 1 arrester during the discharge process. Similar to
a wave breaker, the energy is mitigated to a sufficiently low level, thus considerably relieving downstream SPDs. The WAVE BREAKER
function is integrated in all spark-gap-based type 1 arresters of the Red / Line series.
Direct Current Disconnection
When using surge arresters in d.c. applications, disconnection must be reliably ensured even if there are no zero crossings. The spe-
DEHN DC Safety Technology
DCD D cifically developed DC Disconnection (DCD) technology acts as a wedge similar to a blocking valve and interrupts the direct current.
 DC
Consequently, the devices of the DEHNguard SE DC series are capable of safely interrupting direct currents, thus preventing fire
DC-Disconnection
damage caused by d.c. switching arcs.
Symbol Definition
Compact 3-in-1 protection
VIDEO - RS485 - 230V This arrester allows 3 interfaces to be protected by means of a single device, resulting in reduced space requirements, faster wiring
3in1
and lower installation costs.
IP66
IP66 Surge arrester for Ethernet / PoE++ applications in an IP66 enclosure for safe use in harsh environments (water and dust).
Gigabit Ethernet PoE++ IEEE 802.3 compliant
Waterproof
LifeCheck
Monitoring of the protection components for thermal load as well as the integrated status indication for protection modules for use
in information technology systems allows easy testing and maintenance.
RFID LifeCheck
RFID LifeCheck makes it possible to easily and quickly test arresters for information technology systems. It permanently monitors the
condition of the arrester and detects electrical and thermal load on all protection components.
A Discharge capacity of an SPD (according to the categories from IEC 61643-21)
Impulse D1 (10/350), lightning impulse current 0.5 to 2.5 kA / line
B • exceeds the discharge capacity of B – D
Impulse C2 (8/20), increased impulse load 1 to 5 kA / line
C • exceeds the discharge capacity of C – D
Impulse C1 (8/20), impulse load 0.25 to 1 kA / line
D
• exceeds the discharge capacity of D
Load < C
Protective effect of an SPD (limitation below the test levels according to EN 61000-4-5)
P1 Required test level of the terminal device: 1 or higher
P2 Required test level of the terminal device: 2 or higher
P3 Required test level of the terminal device: 3 or higher
P4 Required test level of the terminal device: 4
Energy coordination (with another Yellow / Line SPD)
k SPD with decoupling impedance, suitable for coordination with an SPD marked with
SPD is suitable for coordination with an SPD with decoupling impedance k

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