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Fuses+holders for protection of 3-phase+N Type 1 AC SPD

SFD1-25S-31

Part Number 64058

Specific Fuses (SPD Fusing Disconnectors) for short circuit protection of AC SPD
For Type 1 SPD
Surge current withstand: 25 kA (@10/350µs)
Very compact
Included fuses
Remote signaling and status signaling

The SFD range has been especially designed to associated with Type 1 SPDs. These very specific fuses are able to conduct huge surge currents in rather small dimensions to protect Type 1 SPDs against harsh current circuit failures. In order to comply IEC 61643-11 standards, AC power SPD must be protected against short circuit failures: these specific fusing disconnectors must be installed in the SPD branch.

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Electrical Properties Mechanical Properties Norms Schematics

AC system		TT-TN
Max. AC operating voltage	Uc	500 Vac
Nominal discharge current 15 x 8/20 µs impulses	In	80 kA
Max. discharge current max. withstand @ 8/20 µs by pole	Imax	100 kA
Impulse current by pole max. withstand 10/350µs by pole	Iimp	25 kA
Equivalent rated AC current		250 A
Breaking capacity		100 000 A
Residual voltage	Up	< 0.5 kV @ 25 kA

Fuse configuration		Cylindrical 22x58 mm
Mounting		Symmetrical rail 35 mm (EN 60715)
Accessory(s) provided		Fuse(s) included
Operating temperature	Tu	-40/+85°C
Protection rating		IP20
Disconnection indicator		Striker
Spare module(s)		SFD1-25
Remote signaling of disconnection		Yes
Dimensions		See diagram
Weight		0.84 kg

Standards compliance

EN 61643-11 /IEC 61643-11 /EN 60269-1/EN 60269-2/IEC 60269-1/IEC 60269-2

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