299 / 582
BETA Protecting
Overvoltage Protection Devices
Surge arresters, type 3
6/13
Siemens ET B1 · 10/2008
6
*
You can order this quantity or a multiple thereof.
■
Overview
Type 3 surge arresters are installed downstream of type 2 surge
arresters in sub-distribution boards close to the loads in single
or multiphase systems and further limit the overvoltage in order
to protect the connected loads.
Type 3 surge arresters in voltage versions 24, 60, 120 and 240 V
can be used in AC and DC systems.
■
Benefits
•
The protective modules are plug-in versions. No mounting
work required when replacing the protective modules
•
All type 3 surge arresters are fitted with a mechanical fault
indication that does not require an extra power supply
•
In the event of a power failure, a remote signaling is output
over an optocoupler with open collector output.
■
Technical specifications
■
Selection and ordering data
Multipole surge arresters, plug-in
2
P
4
P
5
SD7 432-1 5SD7 432-2 5SD7 432-3 5SD7 432-4 5SD7 434-1
Standards
IEC 61643-11; EN 61643-11
Approved acc. to
KEMA
KEMA (available soon)
Rated voltage U
N
V AC 230
120
60
24
230/400
V DC 230
120
60
24
--
Rated load current
I
N
(
at 30 °C)
A
26
26
26
26
3
× 26
Rated arrester voltage U
C
V AC 253
150
100
34
335
V DC 275
200
130
44
--
Rated discharge surge current
I
n
(8/20
s)
kA
3
2.5
2.5
1
1.5
Max. discharge surge current
I
max
(8/20
s)
kA 10
10
6.5
2
4.5
Combined surge U
oc
kV
6
6
4
2
4
Protection level U
p
L–N/L(N)–PE
V
1500/ 600 850/ 350
700/ 250
550/ 100
1200
Response time t
A
ns
100
100
100
100
100
Required back-up fuse, max.
A
25
gL/gG 25 gL/gG 25 gL/gG 25 gL/gG 25 gL/gG
Temperature range
°C -40 ... +85
Degree of protection
IP20, with connected conductors
Conductor cross-section
•
Finely stranded
mm
2
0.2 ... 4
•
Solid
mm
2
0.2 ... 2.5
Mounting width
Acc. to DIN 43880
MW 1
1
1
1
2
Visual function/fault indication
Yes
Remote signaling (RS)
Yes
•
Contact type
NC contacts
•
Operational voltage, max.
V AC 250
•
Operational current, max.
3
Version
Rated voltage
U
N
MW DT Order No.
Price
per PU
PG PU PS*/
P. unit
Weight
per PU
approx.
V AC/V DC
Unit(s) Unit(s) kg
Surge arresters, plug-in
• 2
P
With remote signaling 24
1
A
5
SD7 432-4
008 1
1
0.027
60
1
B
5
SD7 432-3
008 1
1
0.026
120
1
B
5
SD7 432-2
008 1
1
0.081
230
1
A
5
SD7 432-1
008 1
1
0.071
• 4
P
With remote signaling 230/400
2
A
5
SD7 434-1
008 1
1
0.056
© Siemens AG 2008