Fuses and fuse systems, Introduction – Siemens AC-21A User Manual
Page 31
Siemens LV 10 · 2004
7/31
Fuses and Fuse Systems
Introduction
7
1) If a cyclic load is applied, it may be necessary to further reduce the cur-
rents (please inquire about precise values).
2) If overvoltage category 2 (instead of 3) and pollution degree 2 (instead of
3) in accordance with EN 60947-1 is maintained, the rated insulation volt-
age of the SENTRIC 3NP switch disconnectors also amounts to
U
i
= 1000 V.
3) Due to the mechanical stress on the relatively long fuse blades,
3NE41 SITOR semiconductor protection fuses should be switched only
occasionally and only at zero current.
For switch disconnectors
SITOR semiconductor protection fuse
Type
Permissible load cur-
rent of the SITOR
semiconductor protec-
tion fuse in the switch
disconnector
1)
Required conductor
cross-section
Cu
Size
Opera-
tional
class
Rated
current
Rated
voltage
2)
DT
Order No.
PS*
Weight
per PU
approx.
A
mm
2
A
V
kg
For SENTRIC 3NP fuse switch disconnectors
3NP40 7, 3NP50
25
4
00
gR
25
690
}
3NE8 015–1
1 unit
0.205
(3NP40 75/3NP40 76)
33
6
35
}
3NE8 003–1
1 unit
0.204
45
10
50
}
3NE8 017–1
1 unit
0.203
54 (53)
16
63
}
3NE8 018–1
1 unit
0.205
68
25
aR
80
690
}
3NE8 020–1
1 unit
0.203
89 (85)
35
100
}
3NE8 021–1
1 unit
0.205
106 (100)
50
125
}
3NE8 022–1
1 unit
0.213
130 (125)
70
160
}
3NE8 024–1
1 unit
0.207
3NP42, 3NP52
32
6
0
3)
gR
32
1000
}
3NE4 101
1 unit
0.278
38, 40
10
40
}
3NE4 102
1 unit
0.277
45, 50
10
50
}
3NE4 117
1 unit
0.276
59, 63
16
63
}
3NE4 118
1 unit
0.279
76, 80
25
aR
80
1000
}
3NE4 120
1 unit
0.276
90, 95
35
100
}
3NE4 121
1 unit
0.278
115, 120
50
125
}
3NE4 122
1 unit
0.279
144, 150
70
160
}
3NE4 124
1 unit
0.279
3NP43, 3NP53
100 (100)
35
1
aR
100
1000
}
3NE3 221
1 unit
0.580
(3NP43 76)
120 (125)
50
125
}
3NE3 222
1 unit
0.568
150 (160)
70
160
}
3NE3 224
1 unit
0.573
190 (200)
95
200
}
3NE3 225
1 unit
0.570
230 (250)
120
250
}
3NE3 227
1 unit
0.580
3NP43 7, 3NP53
270, 285 (285)
185
aR
315
1000
}
3NE3 230–0B
1 unit
0.585
(3NP43 76)
290, 310 (310)
240
350
}
3NE3 231
1 unit
0.590
310, 330 (330)
240
400
}
3NE3 232–0B
1 unit
0.576
330, 360 (360)
2 × 150
450
}
3NE3 233
1 unit
0.720
3NP44 7, 3NP54
345 (340)
240
2
aR
400
1000
}
3NE3 332–0B
1 unit
0.759
(3NP44 76)
385 (370)
2 × 150
450
}
3NE3 333
1 unit
0.748
430, 450 (410)
2 × 150
500
}
3NE3 334–0B
1 unit
0.753
490, 510 (450)
2 × 185
560
}
3NE3 335
1 unit
0.756
560, 580 (500)
2 × 185
aR
630
1000
}
3NE3 336
1 unit
0.760
590, 630 (510)
2 × 200
710
900
}
3NE3 337–8
1 unit
0.762
605, 630 (520)
2 × 200
800
800
}
3NE3 338–8
1 unit
0.764
630, 630 (530)
2 Ч (50 Ч 5)
900
690
B
3NE3 340–8
1 unit
0.753
3NP44 7, 3NP53
205, 210 (235)
120
aR
250
800
}
3NE4 327–0B
1 unit
0.753
(3NP44 76)
260, 270 (280)
240
315
}
3NE4 330–0B
1 unit
0.760
375, 400 (390)
2 Ч (30 Ч 5)
450
}
3NE4 333–0B
1 unit
0.760
3NP44 7, 3NP54
410, 450 (415)
2 Ч (30 Ч 5)
aR
500
800
}
3NE4 334–0B
1 unit
0.754
(3NP44 76)
540, 600 (480)
2 Ч (40 Ч 5)
710
}
3NE4 337
1 unit
0.761
3NP44 7, 3NP54
140, 145 (140)
70
3
gR
150
500
}
3NC2 423–3
3 units
1.060
(3NP44 76)
175, 180 (175)
95
200
}
3NC2 425–3
3 units
1.050
220, 225 (215)
120
250
}
3NC2 427–3
3 units
1.060
250, 255 (245)
185
gR
300
500
}
3NC2 428–3
3 units
1.070
320, 330 (315)
240
350
}
3NC2 431–3
3 units
1.050
370, 400 (360)
240
400
}
3NC2 432–3
3 units
1.060
120, 135 (120)
70
gR
150
660
}
3NC8 423–3
3 units
1.060
160, 180 (155)
95
200
}
3NC8 425–3
3 units
1.060
200, 225 (195)
120
250
}
3NC8 427–3
3 units
1.060
270, 300 (260)
240
350
}
3NC8 431–3
3 units
1.070
385, 425 (375)
2 × 150
500
}
3NC8 434–3
3 units
1.060
630, 800 (630)
3 Ч (60 Ч 6)
aR
1000
600
C
3NC8 444–3
1 unit
1.080
* This quantity or a multiple thereof can be ordered.