Derating values of 3NP1 fuse switch disconnectors when using SITOR fuses

The 3NP1 fuse switch disconnectors are suitable for all fuses in LV HRC design. SITOR semiconductor fuses in LV HRC design can also be used. Although it must be noted that, compared to cable and line protection fuses, these get much hotter during operation. For this reason, the fuse must be operated below the rated current In of the device (derating) when installed in a closed switching device.

The following tables show the permissible load currents of the SITOR semiconductor fuses for installation in 3NP1. The values were determined using the conductor cross-sections specified in the table.

NOTE

If using smaller cross-sections, a considerably higher derating is required due to the lower heat dissipation.

3NC

SITOR semiconductor fuse data

Permissible load currents 4) of the fuse in 3NP1

Type 1)2)

Size

Rated current In

Rated voltage 3)

Operational class

Required conductor cross-section Cu

Type

Size

Floor mounting

Busbar mounting 5)

A

V AC

mm2

A

A

3NC23..

3

150

500

gR

70

3NP1163

3

140

150

3NC2425..

3

200

500

gR

95

3NP1163

3

175

190

3NC2427..

3

250

500

gR

120

3NP1163

3

220

237

3NC2428..

3

300

500

gR

185

3NP1163

3

250

285

3NC2431..

3

350

500

gR

240

3NP1163

3

320

332

3NC2432..

3

400

500

aR

240

3NP1163

3

370

380

3NC3336-1

3

630

1000

aR

2 x (40 x 5)

3NP1163

3

500

500

3NC3430-1

3

315

1250

aR

2 x 95

3NP1163

3

280

285

3NC3432-1

3

400

1250

aR

2 x 120

3NP1163

3

340

340

3NC3434-1

3

500

1250

aR

2 x 150

3NP1163

3

400

425

3NC3436-1

3

630

1250

aR

2 x (40 x 5)

3NP1163

3

460

535

3NC8423..

3

150

660

gR

70

3NP1163

3

120

140

3NC8425..

3

200

660

gR

95

3NP1163

3

160

190

3NC8427..

3

250

660

gR

120

3NP1163

3

200

240

3NC8431..

3

350

660

gR

240

3NP1163

3

270

300

3NC8434..

3

500

660

gR

2 x 150

3NP1163

3

385

385

1) Due to the mechanical stress on the relatively long fuse blades, SITOR 3NE41 semiconductor fuses should only be switched occasionally and only at zero current.

2) Permissible load currents for 3NE8...-0MK

3) 3NP1 fuse switch disconnectors may be operated at up to 1000 V AC/DC with the following restrictions: Degree of pollution 2 (instead of 3) / AC20 or DC20 – i.e. switching only without load

4) In the case of cyclic loads, the currents may have to be further reduced (precise values on request).

5) Values apply if used with 30 x 10 mm rails; for size 00: 12 x 5 mm and top busbar connection – values for other configurations available on request.

3NE1..

SITOR semiconductor fuse data

Permissible load currents 4) of the fuse in 3NP1

Type 1)2)

Size

Rated current In

Rated voltage 3)

Operational class

Required conductor cross-section Cu

Type

Size

Floor mounting

Type

Size

Busbar mounting 5)

A

V AC

mm2

A

A

3NE1020-2

00

80

690

gR

25

3NP1133

00

80

3NP1133

00

80

3NE1021-0

00

100

690

gS

35

3NP1133

00

100

3NP1133

00

100

3NE1021-2

00

100

690

gR

35

3NP1133

00

95

3NP1133

00

95

3NE1022-0

00

125

690

gS

50

3NP1133

00

120

3NP1133

00

120

3NE1022-2

00

125

690

gR

50

3NP1133

00

115

3NP1133

00

115

3NE1224-0

1

160

690

gS

70

3NP1143
3NP1153

1

2

160

160

3NP1143
3NP1153

1

2

160

160

3NE1224-2/3

1

160

690

gR

70

3NP1143

3NP1153

1

2

150

160

3NP1143

3NP1153

1

2

152

160

3NE1225-2/3

1

200

690

gR

95

3NP1143

3NP1153

1

2

180

190

3NP1143

3NP1153

1

2

180

190

3NE1227-0

1

250

690

gS

120

3NP1143

3NP1153

1

2

235

250

3NP1143

3NP1153

1

2

238

250

3NE1227-2/3

1

250

690

gR

120

3NP1143

3NP1153

1

2

220

235

3NP1143

3NP1153

1

2

213

235

3NE1230-0

1

315

690

gS

2 x 70

3NP1153

2

290

3NP1153

2

315

3NE1230-2/3

1

315

690

gR

2 x 70

3NP1153

3NP1163

2

3

278

380

3NP1153

3NP1163

2

3

315

400

3NE1331-0

2

350

690

gS

2 x 95

3NP1153

3NP1163

2

3

315

340

3NP1153

3NP1163

2

3

350

350

3NE1331-2/3

2

350

690

gR

2 x 95

3NP1153

3NP1163

2

3

300

330

3NP1153

3NP1163

2

3

330

350

3NE1332-0

2

400

690

gS

2 x 95

3NP1153

2

340

3NP1153

2

380

3NE1332-2/3

2

400

690

gR

2 x 95

3NP1153

3NP1163

2

3

328

370

3NP1153

3NP1163

2

3

360

400

3NE1333-0

2

450

690

gS

2 x 120

3NP1163

3

450

3NP1163

3

430

3NE1333-2/3

2

450

690

gR

2 x 120

3NP1163

3

430

3NP1163

3

420

3NE1334-0

2

500

690

gS

2 x 120

3NP1163

3

500

3NP1163

3

450

3NE1334-2/3

2

500

690

gR

2 x 120

3NP1163

3

475

3NP1163

3

450

3NE1435-0

3

560

690

gS

2 x 150

3NP1163

3

560

3NP1163

3

520

3NE1435-2/3

3

560

690

gR

2 x 150

3NP1163

3

555

3NP1163

3

510

3NE1436-0

3

630

690

gS

2 x 185

3NP1163

3

630

3NP1163

3

585

3NE1436-2/3

3

630

690

gR

2 x 185

3NP1163

3

620

3NP1163

3

570

3NE1437-0

3

710

690

gS

2 x (40 x 5)

--

--

--

3NP1163

3

605

3NE1437-1

3

710

600

gR

2 x (40 x 5)

--

--

--

3NP1163

3

590

3NE1437-2/3

3

710

690

gR

2 x (40 x 5)

--

--

--

3NP1163

3

580

3NE1438-0

3

800

690

gS

2 x (50 x 5)

--

--

--

3NP1163

3

630

3NE1438-1

3

800

600

gR

2 x (50 x 5)

--

--

--

3NP1163

3

610

3NE1438-2/3

3

800

690

gR

2 x (50 x 5)

--

--

--

3NP1163

3

600

3NE1447-2/3

3

670

690

gR

2 x (40 x 5)

--

--

--

3NP1163

3

575

3NE1448-2/3

3

850

690

gR

2 x (40 x 8)

--

--

--

3NP1163

3

630

3NE1802-0

000

40

690

gS

10

3NP1123
3NP1133

000

00

40

40

3NP1123
3NP1133

000

00

40

40

3NE1803-0

000

35

690

gS

6

3NP1123
3NP1133

000

00

35

35

3NP1123
3NP1133

000

00

35

35

3NE1813-0

000

16

690

gS

1.5

3NP1123

3NP1133

000

00

16

16

3NP1123

3NP1133

000

00

16

16

3NE1814-0

000

20

690

gS

2.5

3NP1123

3NP1133

000

00

20

20

3NP1123

3NP1133

000

00

20

20

3NE1815-0

000

25

690

gS

4

3NP1123

3NP1133

000

00

25

25

3NP1123

3NP1133

000

00

25

25

3NE1817-0

000

50

690

gS

10

3NP1123

3NP1133

000

00

50

50

3NP1123

3NP1133

000

00

50

50

3NE1818-0

000

63

690

gS

16

3NP1123

3NP1133

000

00

63

63

3NP1123

3NP1133

000

00

63

63

3NE1820-0

000

80

690

gS

25

3NP1123

3NP1133

000

00

80

80

3NP1123

3NP1133

000

00

80

80

1) Due to the mechanical stress on the relatively long fuse blades, SITOR 3NE41 semiconductor fuses should only be switched occasionally and only at zero current.

2) Permissible load currents for 3NE8...-0MK

3) 3NP1 fuse switch disconnectors may be operated at up to 1000 V AC/DC with the following restrictions: Degree of pollution 2 (instead of 3) / AC20 or DC20 – i.e. switching only without load

4) In the case of cyclic loads, the currents may have to be further reduced (precise values on request).

5) Values apply if used with 30 x 10 mm rails; for size 00: 12 x 5 mm and top busbar connection – values for other configurations available on request.

3NE3..

SITOR semiconductor fuse data

Permissible load currents 4) of the fuse in 3NP1

Type 1)2)

Size

Rated current In

Rated voltage 3)

Operational class

Required conductor cross-section Cu

Type

Size

Floor mounting

Type

Size

Busbar mounting 5)

A

V AC

mm2

A

A

3NE3221

1

100

1000

aR

35

3NP1143
3NP1153

1

2

88

95

3NP1143
3NP1153

1

2

95

100

3NE3222

1

125

1000

aR

50

3NP1143

3NP1153

1

2

102

110

3NP1143

3NP1153

1

2

113

125

3NE3224

1

160

1000

aR

70

3NP1143

3NP1153

1

2

130

140

3NP1143

3NP1153

1

2

140

150

3NE3225

1

200

1000

aR

95

3NP1143

3NP1153

1

2

163

175

3NP1143

3NP1153

1

2

170

180

3NE3227

1

250

1000

aR

120

3NP1143

3NP1153

1

2

195

210

3NP1143

3NP1153

1

2

200

215

3NE3230-0B

1

315

1000

aR

185

3NP1153

2

270

3NP1153

2

265

3NE3231

1

350

1000

aR

240

3NP1153

2

290

3NP1153

2

280

3NE3232-0B

1

400

1000

aR

240

3NP1153

2

320

3NP1153

2

310

3NE3233

1

450

1000

aR

2 x 150

3NP1153

2

360

3NP1153

2

330

3NE3332-0B

2

400

1000

aR

240

3NP1153

3NP1163

2

3

330

360

3NP1163

--

3

--

360

--

3NE3333

2

450

1000

aR

2 x 150

3NP1163

3

375

3NP1163

3

390

3NE3334-0B

2

500

1000

aR

2 x 150

3NP1163

3

420

3NP1163

3

415

3NE3335

2

560

1000

aR

2 x 185

3NP1163

3

475

3NP1163

3

460

3NE3336

2

630

1000

aR

2 x 185

3NP1163

3

540

3NP1163

3

500

3NE3337-8

2

710

900

aR

2 x (40 x 5)

3NP1163

3

580

3NP1163

3

500

3NE3338-8

2

800

800

aR

2 x 240

3NP1163

3

605

3NP1163

3

500

3NE3340-8

2

900

690

aR

2 x (40 x 8)

3NP1163

3

630

3NP1163

3

500

1) Due to the mechanical stress on the relatively long fuse blades, SITOR 3NE41 semiconductor fuses should only be switched occasionally and only at zero current.

2) Permissible load currents for 3NE8...-0MK

3) 3NP1 fuse switch disconnectors may be operated at up to 1000 V AC/DC with the following restrictions: Degree of pollution 2 (instead of 3) / AC20 or DC20 – i.e. switching only without load

4) In the case of cyclic loads, the currents may have to be further reduced (precise values on request).

5) Values apply if used with 30 x 10 mm rails; for size 00: 12 x 5 mm and top busbar connection – values for other configurations available on request.

3NE4..

SITOR semiconductor fuse data

Permissible load currents 4) of the fuse in 3NP1

Type 1)2)

Size

Rated current In

Rated voltage 3)

Operational class

Required conductor cross-section Cu

Type

Size

Floor mounting

Type

Size

Busbar mounting 5)

A

V AC

mm2

A

A

3NE4101

0

32

1000

gR

6

3NP1143

1

30

3NP1143

1

32

3NE4102

0

40

1000

gR

10

3NP1143

1

35

3NP1143

1

40

3NE4117

0

50

1000

gR

10

3NP1143

1

42

3NP1143

1

50

3NE4118

0

63

1000

aR

16

3NP1143

1

55

3NP1143

1

60

3NE4120

0

80

1000

aR

25

3NP1143

1

71

3NP1143

1

76

3NE4121

0

100

1000

aR

35

3NP1143

1

84

3NP1143

1

93

3NE4122

0

125

1000

aR

50

3NP1143

1

107

3NP1143

1

115

3NE4124

0

160

1000

aR

70

3NP1143

1

134

3NP1143

1

144

3NE4327-0B

2

250

800

aR

150

3NP1153

3NP1163

2

3

195

215

3NP1153

3NP1163

2

3

220

220

3NE4330-0B

2

315

800

aR

240

3NP1153

3NP1163

2

3

240

270

3NP1163

--

3

--

255

--

3NE4333-0B

2

450

800

aR

2 x (30 x 5)

3NP1163

3

370

3NP1163

3

355

3NE4334-0B

2

500

800

aR

2 x (30 x 5)

3NP1163

3

410

3NP1163

3

390

3NE4337

2

710

800

aR

2 x (50 x 5)

3NP1163

3

540

3NP1163

3

500

1) Due to the mechanical stress on the relatively long fuse blades, SITOR 3NE41 semiconductor fuses should only be switched occasionally and only at zero current.

2) Permissible load currents for 3NE8...-0MK

3) 3NP1 fuse switch disconnectors may be operated at up to 1000 V AC/DC with the following restrictions: Degree of pollution 2 (instead of 3) / AC20 or DC20 – i.e. switching only without load

4) In the case of cyclic loads, the currents may have to be further reduced (precise values on request).

5) Values apply if used with 30 x 10 mm rails; for size 00: 12 x 5 mm and top busbar connection – values for other configurations available on request.

3NE8..

SITOR semiconductor fuse data

Permissible load currents 4) of the fuse in 3NP1

Type 1)2)

Size

Rated current In

Rated voltage 3)

Operational class

Required conductor cross-section Cu

Type

Size

Floor mounting

Busbar mounting 5)

A

V AC

mm2

A

A

3NE8015-1

00

25

690

gR

4

3NP1133

00

25

25

3NE8003-1

00

35

690

gR

6

3NP1133

00

32

35

3NE8017-1

00

50

690

gR

10

3NP1133

00

43

50

3NE8018-1

00

63

690

gR

16

3NP1133

00

52

60

3NE8020-1

00

80

690

aR

25

3NP1133

00

65

72

3NE8021-1

00

100

690

aR

35

3NP1133

00

85

85

3NE8022-1

00

125

690

aR

50

3NP1133

00

100

100

3NE8024-1

00

160

690

aR

70

3NP1133

00

120

115

1) Due to the mechanical stress on the relatively long fuse blades, SITOR 3NE41 semiconductor fuses should only be switched occasionally and only at zero current.

2) Permissible load currents for 3NE8...-0MK

3) 3NP1 fuse switch disconnectors may be operated at up to 1000 V AC/DC with the following restrictions: Degree of pollution 2 (instead of 3) / AC20 or DC20 – i.e. switching only without load

4) In the case of cyclic loads, the currents may have to be further reduced (precise values on request).

5) Values apply if used with 30 x 10 mm rails; for size 00: 12 x 5 mm and top busbar connection – values for other configurations available on request.