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Elecsound Electronics Company Limited
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 Model Number |
Elecsound |
Fuse3610| Fuse 5020| Fuse Holder| KSD301 Big Aluminium Cap| KSD301 Small AluminiumCap| KSD301Small AluminiumCap without Foldable| Auto Fuse|
We offer Offer Fuse, Auto Fuse, Fuse Holder and Thermostat
User"s Manual
User"s Manual For Auto Fuse
Auto fuse is the low voltage DC 32V intended to auto circuit protection.
.Auto Fuse
Part No.
Current Rating
（ A ）
Shell Color
Cold Resistance
（ mΩ ）
Voltage Drop
C0003302Z
3
Purple
30m Ω
100mV
C0004302Z
4
Pink
22m Ω
100mV
C0005302Z
5
Brown
18m Ω
100mV
C7500302Z
7.5
Coffee
11m Ω
100mV
C0041302Z
10
Red
7.5m Ω
88mV
C0015302Z
15
Blue
4m Ω
85mV
C0020302Z
20
Yellow
3.2m Ω
82mV
C0025302Z
25
Natural
2.5m Ω
75mV
C0030302Z
30
Green
1.8m Ω
65mV
C0035302Z
35
Blue green
1.6m Ω
65mV
C0040302Z
40
Amber
1.2m Ω
62mV
User"s Manual for KSD301 Thermostat
1. Performances and Principle:
The KSD301 serial Thermostat produced by our company is a fully closed temperature relay with a shell sensing the temperature by contact with the double sheet metals. It enables two contacts to move quickly for the purpose of switching on or off the circuit through the principle that the disc sheet metal deforms under action of temperature and jumps instantaneously at such point of temperature in combination with the mechanical action. It applies to AC or DC circuits with voltage rating no more than 250V at frequency of 50Hz � 60Hz and current rating no more than 10A resistant load.
2. Precautions:
1) For installation of contact temperature sensing, please keep the metal cover surface firm with the installation surface of controlled appliance, adding the coating of conduction silicon grease or other conduction medium at similar performance on the temperature contact surface in order to ensure the effect of temperature contact.
2) Never collapse, loosen or deform the top of cover surface during installation in order to avoid any influence to its performance.
3) Never infiltrate any liquid into the thermostat, nor over press to crack the shell. No changing of the shape of exterior wiring terminal at free will to influence the electrical reliability. Available with sufficient insulation protection measures to avoid any leakage of electricity and ensure the safety of application.
4) For products used in circuit at no more than 5A current, please choose the lead with cross-section surface of copper core falls within 0.5 � 11m㎡ for connection; For those used in circuit at no more than 10A current, please choose the lead with cross-section surface of copper core falls within 0.75-1.5m㎡ for connection.
5) Keep the product in clean dry warehouse at good ventilation and free of corrosive gas and heating with relative humidity less than 90% and environment temperature under 40°C .
6) Scope of application: It applies to various electrical heating appliances such as: water dispenser, electrical heating vacuum flask, disinfecting cabinet, electrical
User"s Manual for Fuse
Fuse is a safe element locates in the position the most sensitive to any current failure within the circuit. It protects the whole circuit with damage of itself, it is therefore extremely important that how to choose correctly a fuse.
As a result of different opinions on fuse design, it forms internationally two standard systems on fuse.
1 、 The Northern America Standard System as represented by UL and CSA in America and Canada.
2 、 The IEC International Electrical Committer Standard System as represented by BS, VDE of Europe, England and German.
These two standards are incompatible on specific index for fuse. In order to solve this incompatibility between these two standards, UL standard system compromises as follows:
1 ） The Northern America Standard as represented by UL gives concurrent attention to the UR symbol of IEC Standard.
2 ） The uniform symbol for Europe and Northern America.
Since fuse is safety element. Every country pays attention to the production of appliance and equipment in its own country. Products without safety certified symbol are prohibited from local market. To which market users orientate the final products for sale ranks one of the main factors for fuse selection.
Outer Dimension:
Since fuse sacrifices itself to protect other elements, it is determined that it is subject to frequent change. For users" convenience, its dimension has to be standardized. Therefore, to choose proper outer dimension becomes another main factors for fuse.
Voltage Rating:
Fuse voltage is very small under normal operation due to its slight voltage descent, therefore can be left out of account. When fuse blows for the function of protection, both ends of the fuse withstand directly the voltage rating of circuit, and generate flying arc and blow etc. if not in the position to withstand the voltage rating of circuit, the standard voltage of fuse therefore must be greater than or equal to the operating voltage of circuit.
Breaking Capacity:
Fuse breaks completely under fault, while when the fault current is far greater than the voltage and current endurable to fuse itself. The fuse will burst to endanger surroundings, parts and elements. The maximum fault current under the voltage endurable to the fuse itself is called fuse Breaking Capacity. When choose a fuse, user has to estimate its possible maximum fault current, which must be less than the permitted maximum current of fuse. 。
Selection of Fuse Blow Property:
Due to the existence of inductance and capacitance in loop, the instantaneous surge current occurs frequently during switching on / off. Surge current is not fault current but 7 ~ 10 times of normal operation current at different pulse widths. In order to solve the surge current occurred during switching on / off, there comes the delayed fuse. But in some circuits, it is used for direct protection on crystal tube or IC with a hope to blow promptly in case of any fault current greater than the current rating in order to protect the safety of important parts and elements, and quick fuse should be chosen at this time.
Joule Integral of Fuse ∫t:
The operation principle of fuse is that the current passes conductor and heats up with heat energy causing conductor melt down and invalid, the joule integral of fuse is to derive the ∫t value the fuse producer being able to provide for each type and specification through the thermodynamic formula of Q=0.24 Rt when R = 1, and leave out of account the constant 0.24, then Q= ∫t. The physical concept is that if a fuse is installed within a loop, the permitted energy after the fuse within the loop can then be decided at the unit of S .
Of course, since there is difference existing between laboratory and actual conditions of fuse, it is therefore need to multiple ∫t with a coefficient K greater than 1. When the environment temperature is greater than 23°C , as fuse itself is a heating element, being greatly influenced by the environment temperature, it is therefore also need to multiple with a environment coefficient K2.
Fuse is, due to its high reliability in daily life, classified as a standard element. If fuse blows, it means fault in equipment or circuit. If fuse doesn"t blow, it means the equipment is under normal operation, therefore test and examination for fuse is extremely rigorous. If user wants to examine the I-t property of fuse itself, please conduct in respective accordance with the UL248-1, 14 or IEC.127.1, 2, 3 standards, otherwise, it may lead to different results.
Address: Fuhua Road,Futian District, Shenzhen City, GuangDong Province, China
Telephone: 86-755-33361175
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