289 / 582
BETA Protecting
Overvoltage Protection Devices
Lightning arresters, type 1
6/3
Siemens ET B1 · 10/2008
6
*
You can order this quantity or a multiple thereof.
■
Overview
Type 1 lightning arresters protect low-voltage systems against
overvoltages and high surge currents that can be triggered by
direct or indirect lightning strikes.
The protection level is lowered to 1.5 kV by the lightning arresters.
The lightning arresters are enclosed and suitable for mounting in
the precounter sector.
All spark gaps are tripped. For this reason, decoupling reactors
are no longer required for the installation of overvoltage protection
devices.
The lightning arresters are tested using wave-shaped lightning
impulses, 25 ... 100 kA with waveform 10/350 μs.
■
Benefits
•
The rated arrester voltage is a uniform 350 V AC. This increases
safety in systems with extended voltage overshoots.
•
All lightning arresters are fitted with a mechanical fault indication
that does not require an extra power supply. This means they
can be installed in the precounter sector, where electrical
plants can be protected particularly effectively.
•
The protective modules are plug-in versions. No dismantling
of electrical wires required when replacing the protective
modules. When taking insulation measurements, the protective
modules are simply removed in order to ensure disconnection
from the power supply.
•
All lightning arresters have a remote signaling contact, which
signals if the device fails.
■
Technical specifications
5
SD7 411-1
5
SD7 412-1
5
SD7 413-1
5
SD7 414-1
Standards
IEC 61643-11; DIN VDE 06754-6
Approved acc. to
--
UL/CUL
UL/CUL
UL/CUL
Rated voltage U
N
V AC 240
240/415
Rated arrester voltage U
C
•
L/N, N/PE, L/PEN
V AC 350
Lightning impulse current
I
imp
(10/350
s)
•
L/N or L/PEN, 1P/3P
kA 25
25/100
25/75
25/100
•
N/PE
kA --
100
--
100
Rated discharge surge current
I
n
(8/20
s)
•
L/N or L/PEN, 1P/3P
kA 25
25/100
25/75
25/100
•
N/PE
kA --
100
--
100
Protection level U
p
•
L/N, N/PE, L/PEN
kV
1.5
Follow current discharge capacity
I
fi
(
AC)
•
L/N or L/PEN
For 264 V/350 V kA 50/25
50/25
50/25
50/25
•
N/PE
A
--
100
--
100
Response time t
A
•
L/N or L/PEN
ns
100
100
100
100
•
L-(N)-PE
ns
--
100
--
100
Required back-up fuse, max.
A
315
gL/gG
Short-circuit strength
with max. back-up fuse
kA
rms
50
Temperature range
°C -40 ... +80
Degree of protection
IP20, with connected conductors
Conductor cross-section
•
Finely stranded
mm
2
2.5 ... 25
•
Solid
mm
2
2.5 ... 35
Mounting width
Acc. to DIN 43880 MW 2
4
6
8
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