ISO Standard Motor Thermal Switch Bimetal Coils
USD $0.1 - $2.45 /Piece
Min.Order:10 Pieces
Wuhu Boton Automobile Parts Factory
Product Description
Themostatic bimetal types
The type of thermostatic bimetal depends on the application and the available space. Elements can be roughly classified into four main groups:
Beams,
Coils,
Disks,
Formed elements.
Beams develop nearly linear motion. Coils (spiral, helical and double-helix coils) Disks move linearly or discontinuously (snap-action).
Formed elements include a wide range of regular or irregular shapes. The U-shape is very widespread. This type of element is employed when the available space will not permit the use of long, flat beams.
Generally speaking, coils are used wherever extensive motion is required, while beams are required for smaller movements to trip operating mechanisms.
some basic mechanism of bimetal strip :
1.Simple temperature -controlled switch
This type of mechanism is usd for drect switching of an electrical circuit or a mechanical part. When current is passed directly through the element , slow contact motion may result in sparking between the contacts.
2.Counter-acting arrangements
Faster response and higher sensitivity reduces the risk of sparking between contacts in elements with direct electrical heating .
3.Auxiliary thermal switches
The thermostatic bimetal does not form part of the electrical circuit and responds solely to the ambient temperature .
4.Magnetic restraint
a permanent magnet resistrains deflection until the thermostatic bimetal had developed a force sufficient to overcome that of the magnet ,thus causing the contacts to spring parts . Conversely , the contacts close when the element has cooled down.
Thermostatic bimetal functions:
The effects of thermostatic bimetal curvature in response to a change in temperature are utilized in practical applications to achieve different aims. These can essentially be described by the following functions :measuring, limiting,controlling,compensation,pulse-generation,retardation.All these functions overlap to a certain extent so that a particular application may fall under several categories .
Measuring
Temperatures and certain electrical variables and their rate of change can be regulated by calibrated systems.
Examples:
Spiral thermometers, Ammeters
Limiting
Trip functions are required at certain upper or lower limits in order to initiate or to cut out an operation.
Examples :
Automatic circuit breakers
Motor protection switches
Controlling
Within a certain range,functions are cut in or out ,or circuits made or broken,in order to maintain a certain average setting.
Examples:
Electric iron controls, Bypass valves
Compensation
A deviation from the initial condition is compensated for by the thermostatic bimetal action.
Examples :
Color television tube compensation,Measuring instruments with compensation for fluctuations in ambient temperature.
Pulse-generation
An operation is triggered at clocked intervals.
Examples:
Flasher relays, Hotplate heating coils
Retardation
An incoming signal (e.g. current)will only trigger an operation after a defined delay period.
Example:
Thermal relay
Material information
Our package
Spring more application
Our services
Our minimum order quantity is 1000pcs . We are welcome OEM and ODM . We support the technical consult . We believe in our ability . We can assist you solve the technical problem and give you some ideas on the spring install or other aspect .
Shipping Information
-Sea Shipping: Usually it will take around 20-30 days to arrive most countries. You need to make custom clearance when goods arrive your side. It is the cheapest way of shipping. So if you are not in a hurry and have big quantity of goods, you can choose sea shipping.
-Air Shipment: Usually it will take around 3-10 days to arrive most countries. You also need to make custom clearance when goods arrive your side. It is more expensive than sea shipping, but cheaper than by express.
International Express: Such as DHL, FedEx, UPS, TNT, TOLL, DPEX, USPS and so on. You can choose Economy Service which is cheaper than normal service if the goods are not urgent. It is one kind of Door to Door service. Normally if the goods volume is not very big, you don’t need to make custom clearance in your side. The courier will send the goods to your door.
Payment Term
T/T; L/C; Western Union; pay pal
Thanks for your reading . Welcome your consult !!