New Products

DEHNguard ® modular
DEHNguard M TT ... 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
• Prewired complete unit consisting of a
base part and plug-in protection modules
• High discharge capacity due to heavyduty
zinc oxide varistors/spark gaps
• High reliability due to "Thermo Dynamic
Control" SPD monitoring device
9
PE
Basic circuit diagram DG M TT ... FM
15.3
9
11
Dimension drawing DG M TT ... FM
Modular surge arrester for use in TT and TN-S systems ("3+1" circuit); with floating remote signalling
contact
Surge Arresters Type 2
Type DG M TT 150 FM DG M TT 275 FM DG M TT 320 FM DG M TT 385 FM
Part No. 952 328 952 315 952 325 952 316
SPD according to EN 61643-11 Type 2 Type 2 Type 2 Type 2
SPD according to IEC 61643-1/-11 Class II Class II Class II Class II
Nominal a.c. voltage (U N ) 120/240 V 230/400 V 230/400 V 230/400 V
Max. continuous operating a.c. voltage [L-N] (U C ) 150 V 275 V 320 V 385 V
Max. continuous operating a.c. voltage [N-PE] (U C ) 255 V 255 V 255 V 255 V
Nominal discharge current (8/20 μs) (I n ) 15 kA 20 kA 20 kA 20 kA
Max. discharge current (8/20 μs) (I max ) 40 kA 40 kA 40 kA 40 kA
Lightning impulse current (10/350 μs) [N-PE] (I imp ) 12 kA 12 kA 12 kA 12 kA
Voltage protection level [L-N] (U P ) ≤ 0.7 kV ≤ 1.25 kV ≤ 1.5 kV ≤ 1.75 kV
Voltage protection level [L-N] at 5 kA (U P ) ≤ 0.55 kV ≤ 1 kV ≤ 1.2 kV ≤ 1.35 kV
Voltage protection level [N-PE] (U P ) ≤ 1.5 kV ≤ 1.5 kV ≤ 1.5 kV ≤ 1.5 kV
Follow current extinguishing capability [N-PE] (I fi ) 100 A rms 100 A rms 100 A rms 100 A rms
Response time [L-N] (t A ) ≤ 25 ns ≤ 25 ns ≤ 25 ns ≤ 25 ns
Response time [N-PE] (t A ) ≤ 100 ns ≤ 100 ns ≤ 100 ns ≤ 100 ns
Max. mains-side overcurrent protection 125 A gL/gG 125 A gL/gG 125 A gL/gG 125 A gL/gG
Short-circuit withstand capability for max.
mains-side overcurrent protection 50 kA rms 50 kA rms 25 kA rms 25 kA rms
Temporary overvoltage (TOV) [L-N] (U T ) 175 V / 5 sec. 335 V / 5 sec. 335 V / 5 sec. 385 V / 5 sec.
Temporary overvoltage (TOV) [N-PE] (U T ) 1200 V / 200 ms 1200 V / 200 ms 1200 V / 200 ms 1200 V / 200 ms
TOV characteristics withstand withstand withstand withstand
Operating temperature range (T U ) -40°C...+80°C -40°C...+80°C -40°C...+80°C -40°C...+80°C
Operating state/fault indication green / red green / red green / red green / red
Number of ports 1 1 1 1
Cross-sectional area (min.)
1.5 mm 2 solid/flexible
Cross-sectional area (max.)
35 mm 2 stranded/25 mm 2 flexible
For mounting on 35 mm DIN rail acc. to EN 60715
Enclosure material thermoplastic, red, UL 94 V-0
Place of installation indoor installation indoor installation indoor installation indoor installation
Degree of protection IP 20 IP 20 IP 20 IP 20
Capacity 4 modules, DIN 43880 4 modules, DIN 43880 4 modules, DIN 43880 4 modules, DIN 43880
Approvals –– KEMA, VDE, UL, VdS KEMA KEMA, UL
Type of remote signalling contact changeover contact changeover contact changeover contact changeover contact
a.c. switching capacity 250 V/0.5 A 250 V/0.5 A 250 V/0.5 A 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
952 328
DG M TT 150 FM
952 315
DG M TT 275 FM
952 325
DG M TT 320 FM
DG 952 M 316 TT 150 FM
952 DG M 328 TT 385 FM
Überspannungsableiter Typ 2 DEHNguard M 4-polig für TT- und TN-S-
Systeme
DG M TT 275 FM
952 315
Überspannungsableiter Typ 2 DEHNguard M 4-polig für TT- und TN-S-
Systeme
DG M TT 320 FM
952 325
Überspannungsableiter Typ 2 DEHNguard M 4-polig für TT- und TN-S-
Systeme
DG M TT 385 FM
952 316
Überspannungsableiter Typ 2 DEHNguard M 4-polig für TT- und TN-S-
Systeme
Accessory for DEHNguard ® modular
Varistor-Based Protection Module
Varistor-based protection module for DEHNguard M ...
and DEHNguard S ... surge arresters
Type DG MOD ... 150 275 320 385
Part No. 952 012 952 010 952 013 952 014
Max. continuous operating
a.c. voltage (U C ) 150 V 275 V 320 V 385 V
Accessory for DEHNguard ® modular
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
90 www.dehn.de