Fuse Disconnecting Switches

DRO-160 fuse disconnecting switch are mainly used in circuits with high short-circuit current and motor circuit as power switch,disconnecting switch or emergency switch.
Rated insulate votlage up to 50Hz AC,690V;Rated working voltage up to 660V;Rated working current up to 160A;Rated short-time withstand current(valid):3.2KA/1S.The fuse disconnecting switch complies with GB14048.3 and IEC947-3.

The switch with three-phase and half sealed structures is made up of two parts:the seat and the cover(melt-loading device).The front operation can observe the rated data of the fuse links and indicator status.The switch can be matched with NH000 and NH00 fuse.The switch has features of small volume,reliable operation,convenient fuse install and removal and small-required manual operation power.

See in Drawing 15.1 and Table 15.1~ 5.3 the products types,rated insulation voltage rated working voltage,conventional free air thermal current,dimensions and install sizes.

Table 15.1 basic data of switch

Cat. No.	Models	Rated insulation voltage (V)	Rated working voltage (V)	Conventional free air thermal current (A)	Fuse link models	Dimensions /sizes(mm)	Weight (g)
1501	DRO-160	690	380，500，600	160	NH00，NH000	See fig. 15.1	1350

Table 15.2 the working current of the switch at different voltages and different applications

Models	Rated working voltage (V)	Rated working current/applications	Fuse link models	The rated breaking capacity of the fuse links(kA)
DRO-160	380	160A/AC-22 160A/AC-23	NH000,NH00	100
	500	160A/AC-22 80A/AC-23		100
	660	160A/AC-21 36A/AC-23		50

Table 15.3 rated open and breaking capacity of the switch

Rated working voltage (V)	Rated working current (A)	Applications	Rated open and breaking capacity
			Connecting			Breaking
			L/Le	U/Ue	COSф	Lc/Le	Ur/Ue	COSф
380	160	AC-21	1.5	1.05	0.95	1.5	1.05	0.95
380	160	AC-22	3	1.05	0.65	3	1.05	0.65
380	100	AC-23	10	1.05	0.45	8	1.05	0.45
500	160	AC-21	1.5	1.05	0.95	1.5	1.05	0.95
500	100	AC-22	3	1.05	0.65	3	1.05	0.65
500	50	AC-23	10	1.05	0.45	8	1.05	0.45
660	100	AC-21	1.5	1.05	0.95	1.5	1.05	0.95
660	80	AC-22	3	1.05	0.65	3	1.05	0.65
660	36	AC-23	10	1.05	0.45	8	1.05	0.45