AC Outdoor MV Fuse

Description & Application

AC outdoor mv fuse of wind field 12kV & 40.5kV outdoor AC high voltage drop-out fuse cutout is a kind of overload protection device, which is most suitable for using in wind field, power station, etc. It is installed on the high voltage side of distribution transformer or distribution wire pole. The device is used in transformer & line, for short-circuit protection, overload protection and load current on/off.

Technical Parameter

Item	Unit	Data
Rated Voltage	kV	40.5
Rated Continuous Operating Current	A	100、200
Rated Frequency	Hz	50/60
Rated Fuse Base Current	A	100、200
Rated Short-circuit Breaking Current	kA	8kA, 10kA(4time for 100A, 1time for 200A)
Rated Power Frequency Withstand Voltage	kV	100/80(dry/wet)
Rated Lightning Impulse Withstand Voltage	kV	185/200(phase to earth/across isolating distance)
Creepage-distance(silicone rubber)	mm	1256
Mechanical Life	times	500（continuous switch on- off）
Elevation	m	2000
Ambient Temperature	℃	-40 ～ +70

Working Principle

Firstly, insulator, upper & lower fixed parts, installation structure & material have been improved to avoid that the product's shaking leads to fuse tube false dropout. In the meanwhile, the installation angle is adjusted to horizontal from 15~30°.

Secondly, the contact way of moving contact & fixed contact has been improved. Concerning the common product, usually, its upper conductive plate contacts with the dome by compression spring pressure, which in bad weather will easily cause false dropout because of shaking, spring non-effect, conductive part too hot, etc. Therefore, except the common way the bayonet coupling contact way is also added, with these two ways it can stand a wind of 50m/s.

Finally, the operation and installation method have been optimized, the normal off/on operation is the same with common fuse cutout, but when it dropouts, only the moving contact fixed in fuse tube will dropout, the upper contact & upper conductive plate will still keep in touch, because the moving contact is nested with upper contact. Therefore, it should drop down the upper contact with insulated rod before replacing the fuse link

Application Conditions

Ambient Temperature: -40℃～+70℃

Elevation: ≤2000m

Rated Power Frequency: 50Hz/60Hz;

Seismic Intensity: ≤8

Max. Wind Speed: 50m/s

Standard

GB 311.1-2012

GB/T 11022-2011

GB/T 15166.3-2008

DL/T 593

DL/T 640

IEC 60071-1

IEC 62271-1:2007

IEC 60282-2

ANSI C37.41

ANSI C37.42

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