NH Fuse Switch Disconnectors

Functions

NH fuse switch disconnectors are used on low voltage electrical systems that require high protection against shortcircuit while securing on load circuit disconnection and isolation. We can find application on switchboard, distribution systems, OEM, etc.

General characteristics

▪ Four sizes available from 00 to 3 (up to 630A).
▪ Range uniformity and modularity.
▪ Size 00 and 1 offer single pole, double pole, triple pole and quadruple pole models.
▪ Mounting options. Size 000 DIN rail or base mounting. Other sizes base mounting or busbar mounting.
▪ Installation flexibility vertical or horizontal. Sizes 00,1 and 2.
▪ Self extinguishing halogen free materials.

Product construction Base: Manufactured of halogen free glass reinforced self-extinguishing material with high thermal stability characteristics. Copper contacts offer galvanic surface coating. Contact springs made of stainless steel. Symmetrical switch suitable for bottom / top cable terminal connections Cover: The switch operating cover is made of halogen free glass reinforced self extinguishing material. Supplied with large windows which enable to clearly check internal fuse characteristics and indicator status. Ergonomic handle for easy operation.

Spec

Technical specifications

Fuse			NH 00	NH 1	NH 2	NH 3
Conventional free air thermal current with fuse links Ith			160 A	250 A	400 A	630 A
Max. Allowed power dissipation of nh-fuse links Pn			12 W	23 W	34 W	48 W
Conventional free air thermal current with solid links Ith			200 A	400 A	630 A	780 A
Max. Allowed power dissipation of solid links Pn			1.2 W	2.6 W	9 W	17,5 W
Utilization category	AC 21 B	690 V	125 A	200 A	315 A	500 A
	AC 21 B	400 V
	DC 21 B1)	440 V			400 A
	AC 23 B	400 V	160 A	250 A	400 A	630 A
	AC 22 B	500 V	160 A	250 A	400 A	630 A
	DC 22 B	220 V	160 A	250 A
Rated operational voltage Ue			690 V	690 V	690 V	690 V
Rated insulation voltage Ui			1000 V	1000 V	1000 V	1000 V
Rated impulse withstand voltage Uimp			8 kV	12 kV	12 kV	12 kV
Rated frequency			50–60 Hz	50–60 Hz	50–60 Hz	50-60 Hz
Degree of protection			IP20	IP20	IP20	IP20
Pollution degree			3	3	3	3
Rated duty			uninterrupted duty	uninterrupted duty	uninterrupted duty	uninterrupted duty
Rated short-circuit making capacity with solid links Icm			6.2 kAsw	8.2 kAsw	10.6 kAsw	18,6 kAsw
Rated short-circuit making capacity with fuse links		400 V AC	80 kA / le = 160 A	80 kA / le = 200 A	80 kA / le = 400 A	80 kA / le = 630 A
		500 V AC	80 kA le = 160 A	80 kA le = 200 A	80 kA le = 400 A	80 kA le = 630 A
		690 V AC	50 kA le = 125 A	80 kA le = 200 A	80 kA le = 315 A	50 kA le = 500 A
Rated short-time withstand current with solid links Icw			4 kA / 1 s	8 kA / 1 s	13 kA / 1 s	18 kA / 1 s
Power dissipation ith without NH-Fuse links			2.3 W	3.5 W	20 W	40 W
Power dissipation ith without solid links			3.3 W	8 W	50 W	150 W
Cable terminal connections			M8 Screw	M10 Screw	M10 Screw	M12 Screw
Bus bar		Type / Width	60mm / 5-10mm	40-60mm / 5-10mm	40-60mm / 5-10mm	-

Reviews