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BETA Protecting
Low-Voltage Fuse Systems
3
NA, 3ND LV HRC fuse links
3/37
Siemens ET B1 · 10/2008
3
*
You can order this quantity or a multiple thereof.
■
Benefits
•
LV HRC fuse links with combination alarm signal the tripping
of a fuse by a clear color change from red to white. This enables
fast identification and replacement of the tripped fuse links.
This increases plant availability.
•
The insulated grip lugs made of metal are integrated in the top
and bottom covers of the fuse link in molded plastic and provide
greater safety when replacing. The mark shown below indicates
that the grip lugs are insulated .
•
In the standard series with front indicator, the front-mounted
red indicator signals the tripping of a fuse.
•
LV HRC fuse links are always equipped with silver-plated contact
blades. This means that they are non-corroding and have less
contact resistance. This ensures the long-term operational
safety of the plant.
■
Technical specifications
Tripped
Not tripped
Tripped
Not tripped
LV HRC fuse links
Operational
class
Operational
class
gG
aM
3
NA6 ...-4
3
NA6 ...
3
NA3 ...
3
NA6 ...-6
3
NA3 ...-6
3
ND1
3
NA6 ...-4KK 3NA6 ...-7
3
NA3 ...-7
3
NA7 ...-6
3
ND2
3
NY1 8..
3
NA7 ...
3
NA7 ...-7
Standards
IEC 60269-1, -2; EN 60269-1; DIN VDE 0636
Approved acc. to
DIN VDE 0636-2; CSA 22.2 No.106, File No. 1710842
Rated voltage
U
n
•
Sizes 000 and 00
V AC 400
500
500
690
690
500
V DC --
250
250
250
250
--
•
Sizes 1 and 2
V AC 400
500
500
690
690
690
V DC --
440
440
440
440
--
•
Size 3
V AC
500
690
690
V DC
440
--
•
Sizes (IEC design)
V AC
500
--
4
and 4a
V DC
400
--
Rated current
I
n
A
10 ... 400
2 ... 400
2 ... 1250
2 ... 315
2 ... 500
6 ... 630
Rated breaking capacity
kA AC 120
kA DC --
25
--
Contact pins
Non-corroding, silver-plated
Resistance to climate
°C
-20 ...
+50 at 95% relative humidity
© Siemens AG 2008