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BETA Protecting
Overvoltage Protection Devices
Surge arresters, type 2
6/8
Siemens ET B1 · 10/2008
6
*
You can order this quantity or a multiple thereof.
Multipole surge arresters, narrow design
5
SD7 422-0 5SD7 422-1 5SD7 423-0 5SD7 423-1 5SD7 424-0 5SD7 424-1
Standards
IEC 61643-11; VDE 06754-6
Approved acc. to
KEMA KEMA/UL/
CUL
KEMA KEMA/UL/
CUL
KEMA KEMA/UL/
CUL
Rated voltage U
N
V AC 240
240/415
240/415
Rated arrester voltage U
C
•
L/N or L/PEN
V AC 350
350
350
•
N/PE
V AC 264
--
264
Rated discharge surge current
I
n
(8/20
s)
•
L/N or L/PEN, 1P/3P
kA 20
20
20
•
N/PE
kA 20
--
20
Discharge surge current
I
Imp
(8/20
s)
•
L/N or L/PEN, 1P/3P
kA 40
40
40
•
N/PE
kA 40
--
40
Protection level U
p
•
L/N or L/PEN
kV
1.4
1.4
1.4
•
N/PE
kV
1.5
--
1.5
Response time t
A
•
L/N
ns
25
25
25
•
N/PE
ns
100
--
100
Required back-up fuse, max.
A
125
gL
125
gL
125
gL
Short-circuit strength
with max. back-up fuse
kA
rms
25
25
25
Temperature range
°C -40 ... +80
Degree of protection
IP20, with connected conductors
Conductor cross-section
•
Finely stranded
mm
2
1.5 ... 16
•
Solid
mm
2
1.5 ... 25
Mounting width
Acc. to DIN 43880 mm 26
38
50
Visual function/fault indication
Yes
Remote signaling contact
Remote signaling (RS)
Yes
Contact type
Floating CO contact (plug-in)
Operational voltage, max.
V AC 250
V DC 125
Operational current, max.
-
Resistive/inductive load
A AC 1/1
-
Resistive/inductive load
mA DC 200/30
Conductor cross-section
-
Finely stranded
mm
2
1.5
-
Solid
mm
2
1.5
© Siemens AG 2008