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Suzhou Nanci Electronic Appliance&Porcelain Co.,Ltd
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 Click to enlarge image
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 Model Number |
HRW Type |
Application Scope & Main Usage
Cut-out fuse and Load-off cut-out fuse, are suitable for
power transformer and line short circuit, over-load prote-
ction as well asbreaking and making load current using in
power system which rated frequency 50Hz, rated voltage
35kV or less, installing high voltage side of power distribu
tion transformer or distributing main line. They are one kind ideal outdoor protector.
Structure feature and main Principle
Cut-out fuse is made of insulating base, live and fixed
contact and fuse tube. Fixed contact installed on both sides
of insulating base, and live contact installed on both sides
of fuse tube, which is made of inner arc-quenching tube and
out bakelite paper tube or epoxy-glass fiber fabric tube.
Load-off cutout fuse is used for breaking & making load cur
rent with adding spring auxiliary contacts and arc-quenching
cover. When cutout fuse under normal working condition,
fuse tube forms close location with help of tight for fuse link.
When any faults come out in system, fault current make fuse
link melt promptly, and form arcing, arc-quenching tube
heated by arc, decompose lot of gas, produce great pressure
inside of tube, and blow vertically in high strength, the electric
arc would be lengthened and quenched quickly. After melting
of fuse link, fixed contact below turn down due to lost of ten
sion, it makes locking mechanism to release fuse tube to fall
down, it forms obvious breaking off location. When necessary
to pull-off load, unhinge contact with insulating link, live and
fixed contacts are still connected, to pull contacts continuous
with insulating link, auxiliary switch also would be apart, it
make electric arc between auxiliary switches, arc would be
lengthened in narrow slot of arc-quenching cover, which
produce gas at same time, to quench the arc when current over zero.
Technical Performance
Product performance accords with technical requirements
of GB15166.3-94 national standard and IEC282-2 internatio
nal standard.
*Main electric features see following table
Using Environment Conditions
1.Product normal using conditions：
a)Ambient temperature no higher than＋40°C, no less than-40°C;
b)Above sea level no exceeding 1000m;
c)Maximum wind speed no exceeding 35m/s;
d)Earthquake intensity no exceeding 8 degree.
2. Product is not suitable for following location:
a)With inflammation or explosive danger area;
b)With intensive shake or shock area;
c)With conducting electric, chemical gas as well as
heavy pollution & salt fog area.
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