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BETA Protecting
Low-Voltage Fuse Systems
3
NP LV HRC fuse switch disconnectors
3/64
Siemens ET B1 · 10/2008
3
*
You can order this quantity or a multiple thereof.
■
Technical specifications
1)
125/160
A only with 3NY1 236 feeder terminals and 21 mm wide 3NY1 822
(125
A) and 3NY1 824 (160 A) fuse links;
see page 3/76
.
2)
When switching without load (AC-20 B, DC-20 B), direct voltages up
to 690 V DC can be applied.
For degree of pollution 2, the disconnectors can be used up to
1000
V AC-20 B, DC-20 B (switching without load).
Conducting paths in series: 3 for 3NP40; 2 for 3NP42, 3NP43 and 3NP44.
3
NP40 1
3
NP40 7
3
NP42 7
3
NP43 7
3
NP44 7
Standards
IEC 60947-1; IEC 60947-3; VDE 0660-107
Approved acc. to
UL508
Rated uninterrupted current
I
u
A
160
1)
160
250
400
630
For fuse links acc. to DIN 43620
Size
00
C/000
00
1
and 0
2
and 1
3
and 2
Conventional thermal current
I
th
A
160
1)
160
250
400
630
Rated operational voltage U
e
50
Hz/60 Hz
V AC
690
690
V DC
220 (3
conducting paths series-
connected)
440 (2
conducting paths series-connected)
Rated insulation voltage U
i
V
690
800
For safety monitoring max. 690 V.
Rated impulse withstand voltage U
imp
kV
6
Rated conditional short-circuit current
with fuses
(
by fast switch on)
With fuse links
Rated current
Size/A
000/100 (35)
00/160
1/250
2/400
3/630
At 400 V AC (690 V)
kA
(
r.m.s. value)
50 (50)
50
50
50
50
Maximum permissible let-through
I
2
t value
kA
2
s
56 (7.8)
158
551
1515
4340
Permissible let-through current of the fuse
kA
(
peak value)
11 (5)
15
25
35
55
Short-circuit strength with fuses
(
with closed disconnector)
With fuse links
Rated current
Size/A
000/100
00/160
1/250
2/400
3/630
At 690 V
kA
(
r.m.s. value)
100
50
50
50
50
Permissible let-through current of the fuse
kA
(
peak value)
15
15
25
35
55
Rated making and breaking capacity
(
infeed from top or bottom)
At 400 V AC, with fuse links or isolating links
Size
000
00
1
2
3
Rated breaking current
I
c
(
p.f. = 0.35)
A
(
r.m.s. value)
800
(
p.f. = 0.45)
800
2000
3200
5040
Rated operational current
I
e
at
AC-21B, AC-22B
A
160
160
250
400
630
AC-23B
A
100
100
250
400
630
At 500 V AC, with fuse links
or isolating links
Size
000
00
1
2
3
Rated breaking current
I
c
(
p.f. = 0.35)
A
(
r.m.s. value)
320
(
p.f. = 0.45)
320
750
1200
1890
Rated operational current
I
e
at
AC-21B
A
160
160
250
400
630
AC-22B
A
100
100
250
400
630
AC-23B
A
40
40
--
--
--
At 690 V AC, with fuse links
or isolating links
Size
000
00
1
2
3
Rated breaking current
I
c
(
p.f. = 0.35)
A
200/240
200/240
375
600
945
(
r.m.s. value) (at p.f. =
0.45/0.95)
(
at p.f. =
0.45/0.95)
Rated operational current
I
e
at
AC-21B
A
160
160
250
400
630
AC-22B
A
50
50
--
--
--
AC-23B
A
25
25
--
--
--
At 220/240 V DC, with fuse links
2)
or isolating links
Size
000
00
1
2
3
Rated operational current
I
e
at
220
V DC-23B/DC-21B
A
80/160
80/160
--
--
--
440
V DC-21B
A
--
--
250
400
630
© Siemens AG 2008