New Products

DEHNguard ® modular with integrated Backup Fuse
DEHNguard M TT CI ... (FM)
Type 2 Surge Arresters
L1
L2
L3
N
30
L1 L2 L3 N
12
11
14
90
45
72
(4 mods.)
PE
7
43.5
66
• Arrester backup fuse integrated in the
protection module
• Prewired complete unit consisting of a
base part and plug-in protection modules
• High reliability due to "Thermo Dynamic
Control" SPD monitoring device
9 PE
Basic circuit diagram DG M TT CI ... FM
Dimension drawing DG M TT CI ... FM
Modular surge arrester with integrated backup fuses for TT and TN-S systems ("3+1" circuits)
15.3
9
11
Surge Arresters Type 2
Type DG M TT CI 275 DG M TT CI 275 FM
Part No. 952 322 952 327
SPD according to EN 61643-11 Type 2 Type 2
SPD according to IEC 61643-1/-11 Class II Class II
Nominal a.c. voltage (U N ) 230/400 V 230/400 V
Max. continuous operating a.c. voltage [L-N] (U C ) 275 V 275 V
Max. continuous operating a.c. voltage [N-PE] (U C ) 255 V 255 V
Nominal discharge current (8/20 μs) [L-N] (I n ) 12.5 kA 12.5 kA
Nominal discharge current (8/20 μs) [N-PE] (I n ) 20 kA 20 kA
Max. discharge current (8/20 μs) [L-N] (I max ) 25 kA 25 kA
Max. discharge current (8/20 μs) [N-PE] (I max ) 40 kA 40 kA
Lightning impulse current (10/350 μs) [N-PE] (I imp ) 12 kA 12 kA
Voltage protection level [L-N] (U P ) ≤ 1.5 kV ≤ 1.5 kV
Voltage protection level [L-N] at 5 kA (U P ) ≤ 1 kV ≤ 1 kV
Voltage protection level [N-PE] (U P ) ≤ 1.5 kV ≤ 1.5 kV
Follow current extinguishing capability [N-PE] (I fi ) 100 A rms 100 A rms
Response time [L-N] (t A ) ≤ 25 ns ≤ 25 ns
Response time [N-PE] (t A ) ≤ 100 ns ≤ 100 ns
Max. mains-side overcurrent protection not required not required
Short-circuit withstand capability 25 kA rms 25 kA rms
Temporary overvoltage (TOV) [L-N] (U T ) 335 V / 5 sec. 335 V / 5 sec.
Temporary overvoltage (TOV) [N-PE] (U T ) 1200 V / 200 ms 1200 V / 200 ms
TOV characteristics withstand withstand
Operating temperature range (T U ) -40°C...+80°C -40°C...+80°C
Operating state/fault indication green / red green / red
Number of ports 1 1
Cross-sectional area (min.) 1.5 mm 2 solid/flexible 1.5 mm 2 solid/flexible
Cross-sectional area (max.) 35 mm 2 stranded/25 mm 2 flexible 35 mm 2 stranded/25 mm 2 flexible
For mounting on 35 mm DIN rail acc. to EN 60715 35 mm DIN rail acc. to EN 60715
Enclosure material thermoplastic, red, UL 94 V-0 thermoplastic, red, UL 94 V-0
Place of installation indoor installation indoor installation
Degree of protection IP 20 IP 20
Capacity 4 modules, DIN 43880 4 modules, DIN 43880
Approvals KEMA, VDE KEMA, VDE
Type of remote signalling contact –– changeover contact
a.c. switching capacity –– 250 V/0.5 A
d.c. switching capacity –– 250 V/0.1 A; 125 V/0.2 A; 75 V/0.5 A
Cross-sectional area for remote signalling terminals –– max. 1.5 mm 2 solid/flexible
952 322
DG M TT CI 275
952 327
DG M TT CI 275 FM
DG M TT CI 275
952 322
Überspannungsableiter Typ 2 DEHNguard M 4-polig für TT- und TN-S-
Systeme
DG M TT CI 275 FM
952 327
Überspannungsableiter Typ 2 DEHNguard M 4-polig für TT- und TN-S-
Systeme
Accessory for DEHNguard ® modular with integrated
Backup Fuse
Varistor-Based Protection Module for
DEHNguard M CI
Protection module for DEHNguard M ... CI 275 arresters
comprising a varistor connected in series with the integrated
backup fuse
Type DG MOD CI 275
Part No. 952 020
Max. continuous operating a.c. voltage (U C ) 275 V
Accessory for DEHNguard ® modular with integrated
Backup Fuse
N-PE Spark-Gap-Based Protection Module
for DEHNguard M TT ...
N-PE spark-gap-based protection module for two-pole
and four-pole DEHNguard DG M TT ... surge arresters
Type
DG MOD NPE
Part No. 952 050
Max. continuous operating a.c. voltage (U C ) 255 V
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