Circuit Protection
Circuit Protection
An over current is a condition which exists in an electrical circuit when the normal load current is exceeded. The two basic forms of an over current are overloads and short circuits. Fuses and circuits breakers primary role in a circuit is to protect personnel and equipment when dangerous over currents do happen.
Square Body Fuse Link:
Description
Square body DIN 43653 bolted tags high speed fuse links, for the protection of DC common bus, DC drives, power converters/rectifiers and reduced rated voltage starters.
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Technical features:
- Rated voltage: 690 to 1300 V A.C.
- Rated current: 50 A to 1400 A
- Breaking capacity: 100 kA RMS Sym.
- Operating class: aR
BSLV Fuse link and Fuse fittings:
Description:
BS88 style bolted tags high speed fuse links for the protection of DC common bus, DC drives, power converters / rectifiers and reduced rated voltage starters.
Technical features:
Rated voltage:
- FM: 690 V a.c. / 450 V d.c. (IEC); 700 V a.c./500 V d.c. (UL)
- FMM: 690 V a.c. / 450 V d.c. (IEC)
- MT and MMT: 690 V a.c. / 350 V d.c. (IEC); 700 V a.c. (UL)
- Rated current: 160 A to 710 A
Breaking capacity:
- FM: 200 kA RMS Sym. (IEC/UL), 40 kA at 450 V d.c. (IEC), 50 kA at 500 V d.c. (UL)
- FMM: 200 kA RMS Sym. (IEC/UL), 40 kA at 450 V d.c. (IEC)
- MT & MMT: 200 kA RMS Sym. (IEC/UL), 40 kA at 350 V d.c. (IEC)
- Operating Class: aR
NH Din Industrial Fuse links and Bases:
Description:
A square bodied range of industrial fuse links for a wide variety of applications.
Technical features
- Sizes 000 to 4
- Voltage: 500-690 V A.C
- Current: 2 to 1250 A
- Rated breaking capacity: 120 kA AC
- Operating frequency: 45-62Hz.
Cylindrical fuse links and fuse holders
Description
 The 10 x 38 mm cylindrical, class gR fuse links are used to protect AC/DC Drives and semi-conductors.
Technical features
- Rated voltage: 690 V
- Rated current: 4 A to 32 A
- Breaking capacity: 200 kA a.c.
- Operating class: gR Compatible fuse holder
Standards / Agency information
IEC 60269-4, UL 248-13