Siemens AC-21 - Page 18

Siemens LV 10 · 2004
7/18
SENTRIC NP Fuse Switch Disconnectors
General data
7
■ Technical specifications
1) 125/160 A only with 3NY1 236 supply terminals and with 21 mm wide fuse
links 3NY1 822 (125 A) and 3NY1 824 (160 A); see Accessories.
2) Only for isolating links; otherwise note instructions of the fuse manufac-
turer.
3) For no-load switching (AC-20 B, DC-20 B), DC voltages up to DC 690 V
can be applied.
4) For safety monitoring max. 690 V.
5) For pollution severity 2, the switch disconnectors can be used up to 1000 V
AC-20 B, DC-20 B (no-load switching).
6) Conducting paths in series: 3 at 3NP40; 2 at 3NP42, 3NP43 and 3NP44.
Standards IEC 60947-1, IEC 60947-3, VDE 0660 Part 107
Type
3NP40 1 3NP40 7 3NP42 7 3NP43 7 3NP44 7
Rated uninterrupted current I
u
A 160
1)
160 250 400 630
For fuse links acc. to DIN 43620 Size
00C/000 00 1 and 0 2 and 1 3 and 2
Continuous thermal current I
th
A 160
1)
160 250 400 630
Rated operating voltage
U
e
AC 50 Hz/60 Hz V 690 690
DC V 220
(3 conducting paths in series)
440
(2 conducting paths in series)
Rated insulation voltage U
i
V 690 690 800
4)
800
4)
800
4)
Rated impulse withstand voltage U
imp
kV 6 6 6 6 6
Rated conditional short-circuit current with fuses
(on rapid closing)
With fuse links
Rated current Size/A 000/100 (35) 00/160 1/250 2/400 3/630
at AC 400 V (690 V) kA (rms 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 (rms 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
(Feed-in from top or bottom)
At AC 400 V, with fuse links
or isolating links
Size 000 00 1 2 3
Rated breaking current I
c
(p.f. = 0.35) A (rms value) 800 (p.f. = 0.45) 800 2000 3200 5040
Rated operating current I
e
at
AC-21B, AC-22B
AC-23B
A
A
160
100
160
100
250
250
400
400
630
630
At AC 500 V, with fuse links
or isolating links
Size
000 00 1 2 3
Rated breaking current I
c
(p.f. = 0.35) A (rms value) 320 (p.f. = 0.45) 320 750 1200 1890
Rated operating current I
e
at
AC-21 B
AC-22B
AC-23B
A
A
A
160
100
40
160
100
40
250
250
–
400
400
–
630
630
–
At AC 690 V, with fuse links
or isolating links
Size
000 00 1 2 3
Rated breaking current I
c
(p.f. = 0.35) A (rms value) 200/240
(p.f. = 0.45/0.95)
200/240
(p.f. = 0.45/0.95)
375 600 945
Rated operating current I
e
at
AC-21 B
AC-22B
AC-23B
A
A
A
160
50
25
160
50
25
250
–
–
400
–
–
630
–
–
At DC 220 V/240 V, with fuse links
3)5)6)
or isolating links
Size
000 00 1 2 3
Rated operating current I
e
at
220 V DC-23B/DC-21B
440 V DC-21B
A
A
80/160
–
80/160
–
–
250
–
400
–
630