Cable Protectors
Cable protectors are highly demanded electrical products which are used for covering cables and wires. They are also used for covering hoses or pipes in high traffic areas. The main reason for using cable protectors is to protect cables and wires from any kind of external damage. There are a variety of cable protector products available in the market. These are: different types of products. Examples include
* Cable sleeves: These products are made of natural or synthetic materials and are used for protecting hydraulic, pneumatic, and thermally-insulated hoses and cables.
* Cable channels: These products are made of durable, load-bearing materials and are designed for protecting multiple cables.
* Cable covers: These products are used in light-duty applications. These are sold in standard lengths and vary in height and width.
* Wire looms: These products are used for strengthening cables, wires and hose. These products are made from fire resistant materials and are often corrugated. They are made of flexible and flame retardant nylon or polypropylene and are available in colors such as black, gray, and safety yellow.
* Cable surge protectors: These are specialty cable protectors such as electrical outlets and fax/modem protection.
Cable Protection Selection Guide
Buyers should analyze the following points while selecting cable protectors. These are:
* Analyzing the product specifications and features. Cable sleeves are often
* Analyzing the material of construction, such as polyamide, polyester and polypropylene materials.
* Analyzing the products in terms of density, inner diameter (ID), outer diameter (OD), minimum working temperature, and maximum working temperature.
* Analyzing the length, width, and height; number of channels, maximum load capacity, color, and hinge-pin materials in case of cable channels.
* Analyzing the number of outlets, output power capacity, number of phone jacks in case of cable surge protectors.
Approvals and Certifications
All the cable protectors should conform to:
* National Electric Code (NEC)
* Underwriters Laboratories (UL)
Applications
A range of cable protector products are used in numerous areas and industries including:
* Amusement Parks / Fairs
* Aquariums / Zoos
* Arenas / Convention Halls / Sporting Events
* Chemical and Petrochemical
* Construction Sites
* Convention Centers / Airports
* Electric and Gas Utilities
* Manufacturing Plants
* Water and Wastewater Plants
Showing posts with label are. Show all posts
Showing posts with label are. Show all posts
Wednesday, June 2, 2010
Tuesday, June 1, 2010
Electric Dimmers
Electric Dimmers
Dimmer is type of lighting control that is used for varying the brightness of a light. This device works by increasing or decreasing the RMS voltage for varying the intensity of light output. Electric dimmers are available in a range of sizes, right from small units used for domestic lighting to high power units used in large theatre or architectural lighting installations.
While small electric dimmers are directly controlled, remote control systems are also available. The large professional electric dimmers are generally controlled by a digital control system.
In the earlier years, electric dimmers were directly controlled by means of a manual manipulation of large dimmer panels. This implied that all power had to come through the lighting control location that could be potentially dangerous.
Types of Electric Dimmers
Dimmers are available in two types:
* Manual Electric Dimmers: These dimmers are used manually for adjusting light.
* Automatic Electric Dimmers: These dimmers are controlled automatically with the help of a programmable device such as timers and photo sensors.
The earlier dimmers were often based on rheostats. These devices were inefficient and when set to the middle brightness levels, they could dissipate a significant portion of the power rating of the load.
Variacs or variable auto transformers were introduced at a later date. These were highly efficient devices and the dimming effect was independent of the load applied, enabling easier designing of lighting that would be attached to each autotransformer channel. Variacs are not used much in residence, but are still used in other applications such as under/over voltage testing of equipment.
Applications
Dimmers are used in numerous applications including:
* Theatre
* Restaurants
* Museums
* Residence
* Offices
* Stores
Dimmer is type of lighting control that is used for varying the brightness of a light. This device works by increasing or decreasing the RMS voltage for varying the intensity of light output. Electric dimmers are available in a range of sizes, right from small units used for domestic lighting to high power units used in large theatre or architectural lighting installations.
While small electric dimmers are directly controlled, remote control systems are also available. The large professional electric dimmers are generally controlled by a digital control system.
In the earlier years, electric dimmers were directly controlled by means of a manual manipulation of large dimmer panels. This implied that all power had to come through the lighting control location that could be potentially dangerous.
Types of Electric Dimmers
Dimmers are available in two types:
* Manual Electric Dimmers: These dimmers are used manually for adjusting light.
* Automatic Electric Dimmers: These dimmers are controlled automatically with the help of a programmable device such as timers and photo sensors.
The earlier dimmers were often based on rheostats. These devices were inefficient and when set to the middle brightness levels, they could dissipate a significant portion of the power rating of the load.
Variacs or variable auto transformers were introduced at a later date. These were highly efficient devices and the dimming effect was independent of the load applied, enabling easier designing of lighting that would be attached to each autotransformer channel. Variacs are not used much in residence, but are still used in other applications such as under/over voltage testing of equipment.
Applications
Dimmers are used in numerous applications including:
* Theatre
* Restaurants
* Museums
* Residence
* Offices
* Stores
Winding Wires
Winding Wires
Winding wires are among one of the most important types of wire used in electrical industries. They are used in the production of various types of electromagnetic devices like generators, transformers, pumps, control devices and motors. Though a lot of materials are available and suitable for constructing winding wires but copper is the most widely accepted metal for it. Winding wires are either enameled or coated with various types of varnish and other insulating materials.
Copper is the most common conductor used in winding wires. It may be either solid or stranded. It offers very low resistance. The insulation used in these winding wires are made of special and tough grade polymer compounds. These materials make the wire impervious to water, oil, grease, and chemicals.
Applications of Winding Wires
Winding wires are applied in several industries. They are used as very fine wires in electronics and telecommunications applications. Winding wires are used as large insulated and covered wires for large motor and power transformation industries. The use and demand of winding wires are increasing rapidly as the economy of developing countries as well as the developed countries are recovering and surging. So the demand for electricity as well as winding wires is rapidly increasing in these nations. Some of the most important industries where winding wires are used are:
* Automotive
* Domestic appliances
* Electrical rotating machinery
* Transformers
* Other electrical equipment
Varnishing of Winding Wires
Varnishing of winding wires provide a layer of insulation on these wires. The varnishes must have the capability to resist high temperatures. The winding wires are generally composed of a conductive material which is usually copper. This conductor is covered with one or more layers of varnish. Varnishes are comprised of a copolymer which is obtained from a thermoplastic or thermosetting resin. These layers can withstand temperatures up to 200°C. The resin is made of any of the followings materials like
* Polyamide imide (PAI)
* Polyester imide (PEI)
* Polyimide (PI)
* Polyester (PE)
* Polyurethane (PU)
* Polyvinyl acetal (PVA).
Need of varnishing
Varnishes add an extra stability and strength to the winding wires. They improve their ability to withstand partial discharges and voltage peaks at very high temperatures. These insulated varnished winding wires are used in the manufacturing of coils for variable frequency controllers and converters.
Winding Wire Industry
Winding wire is used as semi finished material for generating electromagnetic fields and transforming electrical energy. The industry of winding wire is a mature industry and its market is on the rise. Its use in making different types of electromagnetic devices make them one of the important wires in the electrical industry. The motors, transformers, and generators are the building block of any type of industries, plant or systems. So their use in diverse areas are spreading its market by leaps and bounds.
Double Insulated Submersible Pump Motors Winding Wires
The double insulated winding wires are used for the purpose of winding & re-winding of submersible pumps motors. The especially double insulation of wires is to operate the submersible pumps motor under water over long periods.
Winding wires are among one of the most important types of wire used in electrical industries. They are used in the production of various types of electromagnetic devices like generators, transformers, pumps, control devices and motors. Though a lot of materials are available and suitable for constructing winding wires but copper is the most widely accepted metal for it. Winding wires are either enameled or coated with various types of varnish and other insulating materials.
Copper is the most common conductor used in winding wires. It may be either solid or stranded. It offers very low resistance. The insulation used in these winding wires are made of special and tough grade polymer compounds. These materials make the wire impervious to water, oil, grease, and chemicals.
Applications of Winding Wires
Winding wires are applied in several industries. They are used as very fine wires in electronics and telecommunications applications. Winding wires are used as large insulated and covered wires for large motor and power transformation industries. The use and demand of winding wires are increasing rapidly as the economy of developing countries as well as the developed countries are recovering and surging. So the demand for electricity as well as winding wires is rapidly increasing in these nations. Some of the most important industries where winding wires are used are:
* Automotive
* Domestic appliances
* Electrical rotating machinery
* Transformers
* Other electrical equipment
Varnishing of Winding Wires
Varnishing of winding wires provide a layer of insulation on these wires. The varnishes must have the capability to resist high temperatures. The winding wires are generally composed of a conductive material which is usually copper. This conductor is covered with one or more layers of varnish. Varnishes are comprised of a copolymer which is obtained from a thermoplastic or thermosetting resin. These layers can withstand temperatures up to 200°C. The resin is made of any of the followings materials like
* Polyamide imide (PAI)
* Polyester imide (PEI)
* Polyimide (PI)
* Polyester (PE)
* Polyurethane (PU)
* Polyvinyl acetal (PVA).
Need of varnishing
Varnishes add an extra stability and strength to the winding wires. They improve their ability to withstand partial discharges and voltage peaks at very high temperatures. These insulated varnished winding wires are used in the manufacturing of coils for variable frequency controllers and converters.
Winding Wire Industry
Winding wire is used as semi finished material for generating electromagnetic fields and transforming electrical energy. The industry of winding wire is a mature industry and its market is on the rise. Its use in making different types of electromagnetic devices make them one of the important wires in the electrical industry. The motors, transformers, and generators are the building block of any type of industries, plant or systems. So their use in diverse areas are spreading its market by leaps and bounds.
Double Insulated Submersible Pump Motors Winding Wires
The double insulated winding wires are used for the purpose of winding & re-winding of submersible pumps motors. The especially double insulation of wires is to operate the submersible pumps motor under water over long periods.
Monday, May 31, 2010
Electrical Fuse
Electrical Fuse
A fuse is used for protecting electrical devices and components from over currents and short circuits. A electrical fuse works by interrupting the flow of current through the melting of an internal element.
General specifications
Listed below are common specifications that apply to electric fuses are:
* Fuse types: These include:
o Miniature: These fuses are available in dimensions of 5x20mm and 6.3x32mm.
o Subminiature or micro: Also known as micro fuses, these have very small dimensions (no principal dimension greater than 10 mm) and aresuitable for compact circuit board layouts.
o Midget: These refer to fuses that have 13/32" diameter.
o Automotive: These fuses are only used in automotive.
o Blade type: These fuses are typically used in low voltage, high current applications.
o PC board: These fuses are specifically used on PC boards.
o Protective: These fuses are used for protecting secondary circuits or low voltage ICs.
* Mounting: These include:
o Solderable or surface mount
o Solderable with leads
o Replaceable with holder or clips
o Performance Ratings
There are certain performance criteria that one must consider while selecting fuses. These are:
+ Voltage rating: It is the maximum voltage, up to which a safe fault current interruption will occur.
+ Current rating: It is the maximum continuous operating current of the circuit.
+ Rated breaking capacity: It is the short circuit current at which the fuse can blow without being destructed.
+ Interrupt rating: These can be high interrupt, medium interrupt, or low interrupt.
o Performance Characteristics
There are certain performance characteristics that one must consider while selecting fuses. These are:
+ Fast acting: These fuses are used in circuits that have inrush currents or where the over current must be quickly interrupted.
+ Time lag: These fuses are used in circuits where high starting inrush currents occur and decay gradually.
Operating temperature of fuse is another environmental parameter that must be considered.
* Material of construction: These include:
o Ceramic
o Sand
Enameled Wires
Enameled Wires
Enameled wire is a thin wire insulated with the help of coating. The core material used in it is copper and it is covered with a thin layer of enamel. It is primarily used in electric motor coils. It produces magnetic flux when electricity passes through it. Though enameled wire is insulated but there is no need of stripping off the insulation as for other insulated wires. These wires can be soldered as well.
Enameled Wires
Uses of Enameled wires
* Enameled wire is used in motor coils.
* Enameled wire is used in the construction of electromagnets.
* Enameled wire is also used in construction of transformers and inductors.
Properties of Enameled Wires
* Enameled wires have excellent resistance to heat. That's why they are used in making electric coils. They are also resistant to heat shock.
* They are also resistant to wearing and tearing.
* They offer especially magnificent resistance to refrigerant materials.
* They are smooth, hard, and durable.
* They are chemically resistant, and cannot burn.
Application of Enameled Wires
* Enameled wires are appropriate to be used in compressor motors of freezer, refrigerator and air conditioner.
* They are also best suited to be used in the motors which operate at high temperature, high speed. They are also suitable for those motors which require repeated starting.
* They are applied in hermetical motors and coils of electrical devices.
* They are suitable for those applications where high speed automatic winding is needed.
Types of Enameled Wires
On the basis of materials used in making the core of the wire the enameled wire can be divided into two types. Mainly aluminum and copper is used as the major material for these wires. Sometimes copper-clad aluminum wire is also used.
* Enameled Aluminum Wires: In this category of enameled wires the core material used in the conductor is aluminum. They have very good electric conductivity and are low weight. These wires have high hot impact performance. The enameled aluminum wires are ideal for electric machinery with short and periodic workloads.
* Enameled Copper Wires: The material used in making conductor in this type of wire is copper. These enameled wires have high thermal resistance and are thermally stable. They are resistance to freon. They are resistant to high overload and can bear high heat shock. They are used for smoke and heat exhaust motors and inverter-driven motors.
Classification of Enameled Wires
Enameled wires are classified on three basis. They are classified by
* Diameter
* Temperature
* Isolation
Thursday, May 27, 2010
Electrical switch
Electrical switch
An electrical switch is a commonly used device for making, breaking, or changing the course of an electric circuit. There are different types of electrical switches being manufactured for use in different applications.
Electrical SwitchElectrical Switch
Composition of Electrical Switches
It consists of two or more contacts that are mounted on an insulating structure and is so arranged that they can be moved into and out of contact with each other with the help of a suitable operating mechanism.
The two contacts in a switch are made of metal and the metal is chosen keeping in mind the resistance to corrosion, as most metals are likely to form insulating oxides, which further prevents the switch from working. Contacts in a switch are often plated with noble metal. The switch also has an actuator - a moving part that is used for applying operating force to the contacts.
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