Derating values of 3NP5 fuse switch disconnectors when using SITOR fuses

3NC (derating values)

3NP5 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 table shows the permissible load currents of the SITOR semiconductor fuses for installation in 3NP5. 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.

SITOR semiconductor fuse data

Permissible load currents of fuse when installed in 3NP5 for floor mounting

Type 3NP5

Alternative type 3NP5

Type 1)2)

Size

Rated current In

Rated voltage 3)

Operational class

Required conductor cross-section Cu

Type

Size

Perm. load current 4)

Alternative type

Size

Perm. load current5)

A

V AC

mm2

3NC2423

3

250

500

gR

70

3NP54

3

145

--

--

--

3NC2425..

3

200

500

gR

95

3NP54

3

180

--

--

--

3NC2427..

3

250

500

gR

120

3NP54

3

225

--

--

--

3NC2428..

3

300

500

gR

185

3NP54

3

255

--

--

--

3NC2431..

3

350

500

gR

240

3NP54

3

330

--

--

--

3NC2432..

3

400

500

aR

240

3NP54

3

400

--

--

--

3NC3336-1

3

630

1000

aR

2 x (40 x 5)

3NP54

3

530

--

--

--

3NC3337-1

3

710

1000

aR

2 x (50 x 5)

3NP54

3

570

--

--

--

3NC3338-1

3

800

1000

aR

2 x (40 x 8)

3NP54

3

630

--

--

--

3NC3340-1

3

900

1000

aR

2 x (40 x 8)

3NP54

3

700 5)

--

--

--

3NC3341-1

3

100

1000

aR

2 x (50 x 8)

3NP54

3

770 5)

--

--

--

3NC3342-1

3

110

800

aR

2 x (50 x 8)

3NP54

3

800 5)

--

--

--

3NC3343-1

3

1250

800

aR

2 x (50 x 8)

3NP54

3

850 5)

--

--

--

3NC3430-1

3

315

1250

aR

2 x 95

3NP54

3

295

--

--

--

3NC3432-1

3

400

1250

aR

2 x 120

3NP54

3

355

--

--

--

3NC3434-1

3

500

1250

aR

2 x 150

3NP54

3

440

--

--

--

3NC3436-1

3

630

1250

aR

2 x (40 x 5)

3NP54

3

520

--

--

--

3NC3438-1

3

800

1100

aR

2 x (40 x 8)

3NP54

3

625

--

--

--

3NC8423..

3

150

660

gR

70

3NP54

3

135

--

--

--

3NC8425..

3

200

660

gR

95

3NP54

3

180

--

--

--

3NC8427..

3

250

660

gR

120

3NP54

3

225

--

--

--

3NC8431..

3

350

660

gR

240

3NP54

3

300

--

--

--

3NC8434..

3

500

660

gR

2 x 150

3NP54

3

425

--

--

--

3NC8444-3C

3

1000

600

aR

2 x (69 x 6)

3NP54

3

850 5)

--

--

--

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, see chapter Technical specifications 3NE8 (derating values)

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) The fuse can also be operated at a higher rated uninterrupted current than the 630 A current of the 3NP54. However, in this case, the 3NP54 must not be switched under load (utilization category AC-20).

3NE1 (derating values)

SITOR semiconductor fuse data

Permissible load currents of fuse when installed in 3NP5 for floor mounting

Type 3NP5

Alternative type 3NP5

Type 1)2)

Size

Rated current In

Rated voltage 3)

Operational class

Required conductor cross-section Cu

Type

Size

Perm. load current 4)

Alternative type

Size

Perm. load current5)

A

V AC

mm2

3NE1020-2

00

80

690

gR

25

3NP50

00

80

--

--

--

3NE1021-0

00

100

690

gS

35

3NP50

00

100

--

--

--

3NE1021-2

00

100

690

gR

35

3NP50

00

100

--

--

--

3NE1022-0

00

125

690

gS

50

3NP50

00

125

--

--

--

3NE1022-2

00

125

690

gR

50

3NP50

00

125

--

--

--

3NE1224-0

1

160

690

gS

70

3NP52

1

160

3NP53

2

160

3NE1224-2/3

1

160

690

gR

70

3NP52

1

160

3NP53

2

160

3NE1225-0

1

200

690

gS

95

3NP52

1

200

3NP53

2

200

3NE1225-2

1

200

690

gR

95

3NP52

1

200

3NP53

2

200

3NE1225-3

1

200

690

gR

95

3NP52

1

190

3NP53

2

200

3NE1227-0

1

250

690

gS

120

3NP52

1

250

3NP53

2

250

3NE1227-2

1

250

690

gR

120

3NP52

1

250

3NP53

2

250

3NE1227-3

1

250

690

gR

120

3NP52

1

235

3NP53

2

250

3NE1230-0

1

315

690

gS

2 x 70

3NP53

2

315

--

--

--

3NE1230-2/3

1

315

690

gR

2 x 70

3NP53

2

315

--

--

--

3NE1331-0

2

350

690

gS

2 x 95

3NP53

2

350

3NP54

3

350

3NE1331-2/3

2

350

690

gR

2 x 95

3NP53

2

350

3NP54

3

350

3NE1332-0

2

400

690

gS

2 x 95

3NP53

2

400

3NP54

3

400

3NE1332-2/3

2

400

690

gR

2 x 95

3NP53

2

400

3NP54

3

400

3NE1333-0

2

450

690

gS

2 x 120

3NP54

3

450

--

--

--

3NE1333-2/3

2

450

690

gR

2 x 120

3NP54

3

450

--

--

--

3NE1334-0

2

500

690

gS

2 x 120

3NP54

3

500

--

--

--

3NE1334-2/3

2

500

690

gR

2 x 120

3NP54

3

500

--

--

--

3NE1435-0

3

560

690

gS

2 x 150

3NP54

3

560

--

--

--

3NE1435-2/3

3

560

690

gR

2 x 150

3NP54

3

560

--

--

--

3NE1436-0

3

630

690

gS

2 x 185

3NP54

3

630

--

--

--

3NE1436-2/3

3

630

690

gR

2 x 185

3NP54

3

625

--

--

--

3NE1437-0

3

710

690

gS

2 x (40 x 5)

3NP54

3

710 5)

--

--

--

3NE1437-1

3

710

600

gR

2 x (4 x 5)

3NP54

3

690 5)

-

--

--

3NE1437-2/3

3

710

690

gR

2 x (40 x 5)

3NP54

3

685 5)

-

--

--

3NE1438-0

3

800

690

gS

2 x (50 x 5)

3NP54

3

800 5)

--

--

--

3NE1438-1

3

800

600

gR

2 x (50 x 5)

3NP54

3

750 5)

--

--

--

3NE1438-2/3

3

800

690

gR

2 x (50 x 5)

3NP54

3

770 5)

--

--

--

3NE1447-2/3

3

670

690

gR

2 x (40 x 5)

3NP54

3

655 5)

--

--

--

3NE1448-2/3

3

850

690

gR

2 x (40 x 8)

3NP54

3

820 5)

--

--

--

3NE1802-0

000

40

690

gS

10

3NP50

00

40

--

--

--

3NE1803-0

000

35

690

gS

6

3NP50

00

35

--

--

--

3NE1813-0

000

16

690

gS

1.5

3NP50

00

16

--

--

--

3NE1814-0

000

20

690

gS

2.5

3NP50

00

20

--

--

--

3NE1815-0

000

25

690

gS

4

3NP50

00

25

--

--

--

3NE1817-0

000

50

690

gS

10

3NP50

00

50

--

--

--

3NE1818-0

000

63

690

gS

16

3NP50

00

63

--

--

--

3NE1820-0

000

80

690

gS

25

3NP50

00

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, see chapter Technical specifications 3NE8 (derating values)

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) The fuse can also be operated at a higher rated uninterrupted current than the 630 A current of the 3NP54. However, in this case, the 3NP54 must not be switched under load (utilization category AC-20).

3NE3 (derating values)

SITOR semiconductor fuse data

Permissible load currents of fuse when installed in 3NP5 for floor mounting

Type 3NP5

Alternative type 3NP5

Type 1)2)

Size

Rated current In

Rated voltage 3)

Operational class

Required conductor cross-section Cu

Type

Size

Perm. load current 4)

Alternative type

Size

Perm. load current5)

A

V AC

mm2

3NE3221

1

100

1000

aR

35

3NP52

1

95

3NP53

2

100

3NE3222

1

125

1000

aR

50

3NP52

1

110

3NP53

2

120

3NE3224

1

160

1000

aR

70

3NP52

1

140

3NP53

2

150

3NE3225

1

200

1000

aR

95

3NP52

1

175

3NP53

2

190

3NE3227

1

250

1000

aR

120

3NP52

1

210

3NP53

2

230

3NE3230-0B

1

315

1000

aR

185

3NP53

2

285

--

--

--

3NE3231

1

350

1000

aR

240

3NP53

2

310

--

--

--

3NE3232-0B

1

400

1000

aR

240

3NP53

2

330

--

--

--

3NE3233

1

450

1000

aR

2 x 150

3NP53

2

360

--

--

--

3NE3332-0B

2

400

1000

aR

240

3NP54

3

360

--

--

--

3NE3333

2

450

1000

aR

2 x 150

3NP54

3

400

--

--

--

3NE3334-0B

2

500

1000

aR

2 x 150

3NP54

3

450

--

--

--

3NE3335

2

560

1000

aR

2 x 185

3NP54

3

510

--

--

--

3NE3336

2

630

1000

aR

2 x 185

3NP54

3

580

--

--

--

3NE3337-8

2

710

900

aR

2 x (40 x 5)

3NP54

3

630

--

--

--

3NE3338-8

2

800

800

aR

2 x 240

3NP54

3

630

--

--

--

3NE3340-8

2

900

690

aR

2 x (40 x 8)

3NP54

3

630

--

--

--

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) The fuse can also be operated at a higher rated uninterrupted current than the 630 A current of the 3NP54. However, in this case, the 3NP54 must not be switched under load (utilization category AC-20).

3NE4 (derating values)

SITOR semiconductor fuse data

Permissible load currents of fuse when installed in 3NP5 for floor mounting

Type 3NP5

Alternative type 3NP5

Type 1)2)

Size

Rated current In

Rated voltage 3)

Operational class

Required conductor cross-section Cu

Type

Size

Perm. load current 4)

Alternative type

Size

Perm. load current5)

A

V AC

mm2

3NE4101

0

32

1000

gR

6

3NP52

1

32

--

--

--

3NE4102

0

40

1000

gR

10

3NP52

1

40

--

--

--

3NE4117

0

50

1000

gR

10

3NP52

1

50

--

--

--

3NE4118

0

63

1000

aR

16

3NP52

1

63

--

--

--

3NE4120

0

80

1000

aR

25

3NP52

1

80

--

--

--

3NE4121

0

100

1000

aR

35

3NP52

1

95

--

--

--

3NE4122

0

125

1000

aR

50

3NP52

1

120

--

--

--

3NE4124

0

160

1000

aR

70

3NP52

1

150

--

--

--

3NE4327-0B

2

250

800

aR

150

3NP53

2

210

3NP54

3

220

3NE4330-0B

2

315

800

aR

240

3NP53

2

270

3NP54

3

285

3NE4333-0B

2

450

800

aR

2 x (30 x 5)

3NP53

2

400

3NP54

3

420

3NE4334-0B

2

500

800

aR

2 x (30 x 5)

3NP53

2

450

--

--

--

3NE4337

2

710

800

aR

2 x (50 x 5)

3NP53

2

600

--

--

--

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) The fuse can also be operated at a higher rated uninterrupted current than the 630 A current of the 3NP54. However, in this case, the 3NP54 must not be switched under load (utilization category AC-20).

3NE8 (derating values)

SITOR semiconductor fuse data

Permissible load currents of fuse when installed in 3NP5 for floor mounting

Type 3NP5

Alternative type 3NP5

Type 1)2)

Size

Rated current In

Rated voltage 3)

Operational class

Required conductor cross-section Cu

Type

Size

Perm. load current 4)

Alternative type

Size

Perm. load current5)

A

V AC

mm2

3NE8015-1

00

25

690

gR

4

3NP50

00

--

--

--

3NE8003-1

00

35

690

gR

6

3NP50

00

--

--

--

3NE8017-1

00

50

690

gR

10

3NP50

00

--

--

--

3NE8018-1

00

63

690

gR

16

3NP50

00

--

--

--

3NE8020-1

00

80

690

aR

25

3NP50

00

--

--

--

3NE8021-1

00

100

690

aR

35

3NP50

00

--

--

--

3NE8022-1

00

125

690

aR

50

3NP50

00

--

--

--

3NE8024-1

00

160

690

aR

70

3NP50

00

--

--

--

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) The fuse can also be operated at a higher rated uninterrupted current than the 630 A current of the 3NP54. However, in this case, the 3NP54 must not be switched under load (utilization category AC-20).