Wenzhou Shuowei Electric Co., Ltd. is one of the most reliable manufacturers and suppliers of knife-contact fuse rt16 series in China, also supports customized service. Welcome to wholesale bulk advanced knife-contact fuse rt16 series in stock here from our factory. If you have any enquiry about quotation, please feel free to email us.
Overview
This series fuse is designed for protection against line overload and short-circuit in industrial electrical distribution equipment operating at AC 50Hz, up to 690V AC, 250V to 440V DC, and currents up to 1250A.
Main purpose
This series fuse is suitable for line overload and short-circuit protection in the distribution equipment of industrial electrical equipment with AC rated frequency of 50Hz, rated voltage of AC to 690V, DC 250V to 440V and rated current to 1250A.
Normal working conditions
Ambient air temperature
The ambient air temperature shall not exceed 40 degree, the average value measured in 24 hours shall not exceed 35 degree, and the average value measured in one year shall be lower than this value. The minimum ambient air temperature is -5 degree.
Atmospheric conditions
Its relative humidity shall not exceed 50% at the maximum temperature of 40℃.
A higher relative humidity can be obtained at a lower temperature, for example, up to 90% at 20 degree.
Under these conditions, moderate condensation may occur by chance due to temperature changes.
Altitude
The altitude of the installation site shall not exceed 2000m.
Voltage
The maximum system voltage shall not exceed 110% of the rated fuse voltage.
For fuse with rated voltage of 690V AC and 250V/440V DC, the maximum system voltage shall not exceed 105% of rated voltage of fuse.
Normal installation conditions
Installation category
The installation category of fuse is class III.
Pollution level
The anti pollution degree of fuse shall not be lower than level 3.
Installation mode
The fuse can be installed vertically, horizontally or obliquely in the workplace without significant shaking and impact vibration.
Breaking range and use category
The fuse link for fuse is a fuse link with general purpose and full range breaking capacity, i.e. "gG" fuse link.
Structural features and working principle
The fuse consists of fuse base and fuse link. The fuse base is composed of base contact, base plate, etc. The fuse link is composed of fuse tube, melt, quartz sand, knife type contact, etc.
When the fuse is installed in the circuit, when the current passing through the fuse exceeds a certain value for a sufficient time, the melt in the fuse body will be fused, and the arc generated when the fuse is fused by quartz sand in the fuse tube will be extinguished, so as to achieve the purpose of breaking the circuit. When the melt is blown, the indicator on the fuse link will pop up, indicating that the fusc link is blown.
For the fuse equipped with an impactor, when the melt is fused, the impactor will pop out automatically. The user only needs to install a microswitch or a suitable signal sending device (selected and purchased by the user)in front of the impactor, and then the required signal can be obtained after the fuse is fused.
Main technical parameters
Main technical parameters of fuse are shown in Table 1
Outline, installation dimension and weight of fuse
Outline, installation dimension and weight of fuse base
See Figure 1 and table 2 for the outline and installation dimension of fuse base, and see Table 2 for the weight of fuse base.
Boundary dimension and weight of fuse link
See Figure 2 and table 3 for the boundary dimension of fuse link, and see Table 3 for the weight of fuse link.
Installation, use and maintenance of fuse
The fuse shall be installed indoors or in a cabinet that will not be affected by rain and snow, and shall not be exposed and installed in a place easy to touch and installing the fuse, ensure that the electrical clearance is greater than 8mm and the creepage distance is greater an 10mm. In the circuit, the cross-sectional area of the connecting wire is recommended as the value in Table 4.
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