SCAC

197

Semiconductor fuses

Semiconductor (AC) fuses

Ferrule Fuses

27x60 URQ/URS/URB - 690 V to 1000 VAC

12/04

Corrective factor

Peak arc voltage

Above: Mean curves show variation of total clearing time (

DC Application data

Left: Curves indicate permissible value

of time constant L/r as a function of the

DC working voltage

These curves show peak value Um of arc voltage which appears across the fuse-link as a function of operating voltage U @ cos

ϕ = 0.15.

50 to 200 A URQ

250 A URQ

32 to170 A URB

50 to 200 A URQ

250 A URQ

32 to170 A URB

K

K

K

1,2

1

0,8

0,6

0,4

0

200

400

600

1,2

1

0,8

0,6

0,4

0,2

0,2

0

200

100

400

300

500 600

U(V)

U(V)

1,2

1

0,8

0,6

0,4

0,2

0

200

400

600

800 1000

U(V)

L

R

80

70

60

50

40

30

20

10

100

200

300

400

500

600

U(V)

(ms)

0

In <= 160 A

In <= 200 A

In <= 250 A

200

300

400

500

600

700

800

500

700

900

1100

1300

1500

U (V)

125-160A URS

125-160A URS

Um(V)

U(V)

2000

1000

0

100 200 300 400 500

600 700

Um(V)

U(V)

2000

1000

0

0

100 200 300 400 500

500

600

600

700

700

800

900

1000

Um(V)

2000

1000

U(V)