Heavy Wall Tubing

Heavy Wall Tubing



3M™ Heavy Wall Tubing is designed to provide reliable performance as well as excellent mechanical and environmental protection. It is flame retardant and UV resistant, and offers easy handling and installation.

Dual Wall Tubing

Dual Wall Tubing



3M™ Dual Wall Tubing has an outer wall that provides abrasion resistance and an inner wall that forms an environmental seal against moisture penetration. It is flame retardant, offers a choice of shrink ratios, and meets both UL/CSA specifications and military specifications

3M™ Fire Barrier Pillows

3M™ Fire Barrier Pillows



Our pillows intumesces (expands) and locks itself into place, completely surrounding the penetrant(s) stopping smoke, fire and toxic gases from spreading to the next room or next floor for the rated time period. They are easy to install and great for retrofit project.

Insulating and Splicing Tape

Insulating and Splicing Tape



A variety of tapes are available from 3M to meet your insulating and splicing requirements. For example, Scotch® Linerless Rubber Splicing Tape 130C is a highly conformable, linerless, high-voltage insulating tape that provides excellent thermal dissipation of splice heat and meets industry specifications.

Connectors

Connectors


The best connectors do more than fit your application; they also fit your hand, and they feel good to use. At 3M, we design connectors that are as comfortable and easy to use as they are dependable. Our complete line provides a wide range of connector choices. Simply choose the connector that fits your personal preference, as well as the application. We give you plenty of choices.

3M™ Portable Labeler PL300K

3M™ Portable Labeler PL300K


The 3M™ Portable Labeler PL300 is a rugged, multi-faceted labeling tool. The unit provides hot keys for automatic labeling tasks and PC connectivity allows the user to insert customized graphics, logos, symbols and industry terms to customize their labeling jobs. Provided in a kit with labeler, refill cartridges, lithium-ion battery pack and AC adapter.

Full Description »

A step-by-step wizard makes operation fast and easy. The unit comes equipped with a library of over 250 industry terms and symbols and is capable of saving more than 1000 custom labels. The PL300 has an integrated impact bumper, a quick-charge lithium-ion battery and a power-assisted label cutter. The unit uses interchangeable industrial label cartridges that are easy to load, remove and peel.

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Products

Product Documentation


Product Number MSDS
PL300K

UPC: 00051128584552 Find a distributor

Request more information
AC Adaptor/ Rechargeable Battery: Yes
Backlit LCD: Yes
Bar Code Capability: Yes
Hot Keys: Yes
Label Size Support: 1/4 to 1 Inch
Label Storage: 1000
PC Conn: Yes
Prints on Heat Shrink: Yes
Rubber Protective Bumper: Yes
Symbol Library Terms: 150

Nutone, Heaters, 9810WH

Nutone, Heaters, 9810WH



WALL HEATER: 120/240 V; 8.75 AMPERE; POWER RATING 1050 W; HEATING CAPACITY 3413 BTU/HR; 50 W MOTOR; HOUSING SIZE 10-1/2 INCH W X 3-3/8 INCH D X 12-1/2 INCH H; POLYMER; WHITE; WALL MOUNTING; APPLICATION DEN, FAMILY ROOM, OFFICE; APPROVAL UL; NUTONE[R] BRAND; GRILL SIZE 11-9/16 INCH WIDTH X 14-3/4 INCH HEIGHT

3M™ Portable Labeler PL100

3M™ Portable Labeler PL100


Highly efficent and affordable, the 3M™ Portable Labeler PL100 offers versatility and value for your labeling needs. This compact unit can print on a variety of materials, including heat shrink and is equipped with hot keys for automatic labeling task

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The PL100 is equipped with 6 hot keys allowing printing of incremental text and numerical information in flag, fixed-length and vertical label formats.

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Products

Product Documentation


Product Number MSDS
PL100

UPC: 00051128584576 Find a distributor

Request more information
AC Adaptor/ Rechargeable Battery: No
Backlit LCD: No
Bar Code Capability: No
Hot Keys: Yes
Label Size Support: 1/4 to 1/2 Inch
Label Storage: 0
PC Conn: No
Prints on Heat Shrink: Yes
Rubber Protective Bumper: No
Symbol Library Terms: 70

Nutone, Fans, PFMB52BR

Nutone, Fans, PFMB52BR:



CEILING FAN: NUMBER OF SPEEDS 3; WOOD BLADE MATERIAL; POLISHED BRASS FINISH; NUMBER OF BLADES 5; NUTONE[R] BRAND; CURRENT RATING 0.6 AMPERE; SIZE 52 INCH

Lutron, Dimmers, C-1000-BE:

Lutron, Dimmers, C-1000-BE:


ROTARY DIMMER: WALL DIMMER; ROTARY ON/OFF SWITCH OPERATOR; OPERATION TYPE SINGLE POLE; 120 VAC AT 60 HZ; INCANDESCENT LOAD; 1000 W LOAD; 1-GANG, BEIGE FINISH WALL PLATE; BEIGE; SIZE 2.75 INCH W X 1.93 INCH D X 4.5 INCH H; APPLICATION COMMERCIAL, RESIDENTIAL; APPROVAL UL, CSA; CENTURION[R] BRAND; C-1000 MODEL; RADIO FREQUENCY INTERFERENCE PROTECTION

Terminal Boxes

Terminal Boxes



Application Information

Terminal Boxes are for use in converting from overhead to under-ground services and for multi-circuit wiring. The NEMA 3R enclosure provides protection for all terminations inside and provides a convenient, time-saving means of wire splices and connections. Midwest offers a full line of terminal boxes for 240 volt single phase and three phase, and three phase 600 volt ratings to meet your application requirements. Typical applications, both indoor and outdoor, include inter-building wiring on farms, convenient splicing means for industrial use and commercial construction.

Features & Benefits

Rugged Durability:

* Heavy zinc coated steel with electro-deposition paint finish
* Suitable for NEMA 3R and NEMA 1 installations
* UL Models listed as termination boxes

User Safety:

* Padlock provisions to prevent unauthorized entry

Installation Ease:

* Stationary mounted terminations make circuit tracing much easier
* Terminals accept copper or aluminum wire
* Factory installed terminal bars
* Wide range of concentric knockouts
* Door has stay open position or removes completely
* Wide range of terminals meet varied application requirements

Transfer Switches

Transfer Switches


The Midwest Heavy Duty manual transfer switch provides reliable, and trouble-free transfer of power from the normal utility supplied source to a stand-by generator enabling the user to maintain power during utility down time periods. The "double throw" mechanism helps prevent dangerous backfeeding of generator power into the utility system. The Midwest transfer switch is designed to be fully operational and switchable at full rated capacity.

The Midwest Transfer switch is available in single phase and three phase configurations, 100-400 amperes and in ratings through 600v. Special application models with meter sockets or switched neutrals are also available. Typical applications include poultry farms and dairy farms, ventilation in animal confinement buildings, crop drying, and anywhere an extended loss of normal power service would result in severe loss, damage or inconvenience.

Features & Benefits

Rugged Durability:

* Quick-Make, Quick-Break switch mechanism on most models
* All-In-One Construction for factory assured terminations
* Bus bars used to interconnect main and standby switches on most models
* Knife blade switch contacts provide long life
* Heavy zinc coated steel with highest quality electro- deposition finish resists corrosion and fading
* Welded flange NEMA 3R construction for lasting service in out-door installations
* Quality user tested components for long life
* Many models UL Listed "Suitable for use as service equipment when installed in accordance with the NEC."

User Safety:

* Interlock allows door opening only when switch is in the off position
* Padlock provision in all three on-off-on transfer positions
* Door has padlock provision

Installation Ease:

* Optional neutral kit available for both 240 volt and 600-volt
* Broad range of concentric knockouts to accommodate varied wiring needs
* All terminals accept copper or aluminum wire for added installation flexibility

Marina Electrical Equipment

Marina Electrical Equipment



Today, most marinas and boat docks also provide shore power for their tenants. This application presents unique requirements including atmospheric conditions, receptacle versatility, rugged construction and attractiveness. Midwest Electric offers a complete line of metered and unmetered power outlets for marina applications and is the only U.S. manufacturer that offers a line of both metal and non-metallic power centers in either surface mount or pedestal configurations. All Midwest Electric marina power outlets utilize corrosion-resistant, grounding and locking type receptacles with individual circuit breaker protection enclosed in a single, easy to install enclosure. The different styles of construction in the products manufactured by Midwest Electric include:

* Non-metallic power centers - DockPro™, Dockmaster™ and Dockmate™
* Metallic power centers- Dockhand™ (featuring galvanized steel construction)

View marina requirements from the 2002 National Electric Code.

Midwest Electric is ready to provide you with just the right options to meet your unique marina needs. Click to learn more about DockPro™, Dockmaster™, Dockmate™ and Dockhand™ power centers, along with our new line of DockPro dock-lights and Firestation fire extinguisher safety pedestals. New for 2004 is our ability to incorporate a wireless remote metering option either as a turnkey package or as a field modification to our marina product line.

With so many possible combinations, it is a challenge to list them all in our e-CATALOG. Learn more about Midwest Electric's versatile marina lines in the full Marina Catalog!

Features & Benefits

Rugged Durability:

* Non-metallic models utilize virgin (not recycled) resins, which provide for a higher degree of ultra-violet (UV) protection.
* Receptacles are attached to an internal stainless steel mounting bracket as opposed to being attached with screws through the dead front. This feature eliminates areas of stress around those screws where cracks can begin to form due to the constant attaching and detaching of the shore power cord.
* All metal units are painted twice with the final coat being an electro-statically applied powder spray coat. This process also enhances the UV protection as well as providing for a more corrosion resistant product.
* All post and/or pedestal models include loop feed lugs as a standard feature.
* Receptacle configurations from 20 amp to 100 amp single and 100 amp 3-phase cover all of your electrical requirements.

User Safety:

* Dead front construction prevents accidental contact with live parts
* Marina models are UL listed in their entirety, not just shown as using "UL approved" components. This ensures that you have the safest product available.
* Midwest sources only the highest quality components and materials which are used in the manufacturing of our marina products. Safety is never compromised with the use or substitution of inferior products or cheaper materials.
* Optional GFI circuit breakers can be incorporated in the DockPro, Dockmate & Dockmaster product lines offering a higher level of personnel protection.

Installation Ease:

* All components factory wired and assembled, reducing installation time
* All terminals accept copper or aluminum wire for added installation flexibility
* Non-metallic units are designed to allow for easy receptacle change-outs. As your electrical requirements change our units are designed to be modified to grow with you.
* Units are multi-listed for several major brands of circuit breakers including those from GE making it easy for replacement should it be necessary.
* All internal metal components are of a stainless grade which aides in the prevention of corrosion.
* External components are relatively maintenance free thus reducing labor costs to the marina.

Temporary Power & Power Outlets

Temporary Power & Power Outlets



Prior to permanent installation of the service equipment, a means of temporarily supplying power is required by the various construction trades. Many times, this requires several receptacles, over current protection and possibly a meter socket and GFCI, all designed for outdoor installation. Temporary power equipment from Midwest Electric combines all the required components in a single enclosure.

Site-Power™ construction site equipment from Midwest Electric combines all the required components in a single enclosure. Completely factory-assembled and factory-tested, Site-Power™ comes to the construction job site ready for work. All you do is mount it, connect it, and it�s ready to use� over and over again. No need to field assemble individual parts, saving installation time. Site-Power™ protects itself against weather, vandalism, and nuisance tripping. The single, heavy-gauge NEMA 3R rainproof enclosure is lockable and is engineered for maximum protection of receptacles, cords, plugs, breakers, and GFCI's. Site-Power™ fully meets the 2002 National Electrical Code and OSHA requirements.

Power Outlets For Farm, Home and Industry

Portable equipment requiring electricity continues to increase steadily creating the need for conveniently located receptacles to provide power for cord connected equipment. Midwest Electric Power Outlets provide one or more receptacles, with or without overcurrent protection, in a single enclosure eliminating the need for several separately mounted components while providing maximum protection against weather and normal field use. Additionally, many models are offered that also include disconnecting, metering, and/or pedestal mounting functions in a single NEMA 3R enclosure/assembly.

Features & Benefits

Rugged Durability:

* All-in-one construction for factory assured terminations
* Rolled edge door for cord protection
* Continuous duty meter socket with meter guides and reinforced jaws
* Utility accepted meter sealing accommodations
* Heavy G-90 galvanized steel with highest quality electro-deposition finish provides excellent corrosion protection
* Welded flange NEMA 3R construction for lasting service in out-door installations

User Safety:

* Dead front construction prevents accidental contact with live parts
* Door has padlock provisions to prevent unauthorized access
* Listed by Underwriters Laboratories

Installation Ease:

* All components factory wired and assembled, reducing installation time
* Door removable for installation ease; stay-open position for user convenience
* All terminals accept copper or aluminum wire for added installation flexibility
* Wide range of receptacle configurations
* Broad range of concentric knock-outs to accommodate varied wiring needs
* All units with 12-2 Cu Al equipment ground lug

Disconnects

Disconnects



Application Information

Midwest Electric Products leads the industry with quality weatherproof electrical equipment. Our NEMA 3R air conditioner disconnect line is the largest offering in the industry and is built with the same quality features which are found in all Midwest products.

The 2002 National Electrical Code requires that a disconnecting means shall be located within sight from and readily accessible from the air-conditioning or refrigerating equipment.

All Midwest models provide the disconnecting function specified in NEC 440-14. The type of equipment and local codes determine which type of disconnecting means is acceptable.

Features & Benefits

Flexibility:

* 30-60 amperes
* 240 volts A.C.
* 1 phase and 3 phase
* Horsepower rated
* 10,000 A.I.C.
* UL & CUL Listed

User Safety:

* Door has padlock provisions to prevent unauthorized access

Installation Ease:

* Three piece construction that opens up mounting and wiring areas for straight-in, straight-out wiring, reducing installation time and saves money
* Terminals approved for 60°C and 75°C wire, accepts solid 14-8 copper, 12-8 aluminum or stranded 14-3 copper, 12-3 aluminum
* Numerous knockouts increases installation options

Rugged Durability:

* Noryl® thermoplastic enclosure is corrosion resistant and extremely durable, giving long maintenance-free service
* G90 galvanized steel with highest quality electro-deposition finish resists corrosion and fading

Service Entrance

Service Entrance



Application Information

Where electrical power enters a building or other structure, the National Electrical Code (NEC) requires electrical distribution equipment rated as "Service Entrance." Such service equipment usually consists of one main breaker disconnect or space for up to 6 submain disconnects. Midwest models meet these NEC requirements and are UL listed as service entrance equipment. These service entrance products are typically utilized on single family residences and mobile homes. Additionally, service entrance for mobile homes is generally located within 30 feet of the mobile home. This location requirement by the NEC and the common use of underground service feeders combine to make service entrance on a pedestal the preferred installation method by many park owners. Midwest offers a broad range of pedestal units, all factory assembled and wired with loop feed lugs to reduce installation time and labor expense. Midwest also offers a wide selection of surface units for single family residences and mobile home sites.

Features & Benefits

Rugged Durability:

* Heavy G90 galvanized steel with highest quality electro-deposition finish resists corrosion and fading
* 125, 200 or 320 Amp continuous duty meter socket with meter guides and reinforced jaws for ring and ringless type sockets

User Safety:

* Utility meter socket compartment provides barrier from breaker mains for utility power protection
* UL listed "Suitable for use as service equipment"
* Rated NEMA 3R - weather proof equipment
* Padlock provision on door to help prevent unauthorized access
* Rolled edge post bottoms to protect service cable

Installation Ease:

* All terminals accept copper or aluminum wire for added installation flexibility
* Supplied with 12-2 Cu/Al equipment ground lug
* Removable post door allows lay in wiring

Post models:

* Factory wired loop feed lugs
* Posts available with stud terminations to accept compression type lugs
* Locking hasp for utility seal on post covers

Recreational Vehicle Park Equipment

Recreational Vehicle Park Equipment

Application Information

Today, most recreational vehicle parks provide power for their tenants. This application presents unique requirements including user safety, rugged construction, weather protection, receptacle versatility and attractiveness.

Midwest offers both the traditional metallic equipment and the Parkmate™ series of non-metallic thermoplastic units. Both sytles provide a variety of options including electronic metering, integrated TV/Telephone and various light options.

Features & Benefits

Rugged Durability:

* All-in-one construction for factory assured terminations
* Rolled edge door for cord protection
* Continuous duty meter socket with meter guides and reinforced jaws
* Utility accepted meter sealing accommodations
* Heavy G-90 galvanized steel with highest quality electro-deposition finish provides excellent corrosion protection
* Welded flange NEMA 3R construction for lasting service in out-door installations
* Lighted units include a LED lamp rated for 100,000 hours - that's almost ten years without having to change a lamp!

User Safety:

* Dead front construction prevents accidental contact with live parts
* Door has padlock provisions to prevent unauthorized access
* Listed by Underwriters Laboratories (consult Manufacturer's Representative for CUL)

Installation Ease:

* All components factory wired and assembled, reducing installation time
* Door removable for installation ease; stay-open position for user convenience
* All terminals accept copper or aluminum wire for added installation flexibility
* Wide range of receptacle configurations
* Broad range of concentric knock-outs to accommodate varied wiring needs
* All units with 12-2 Cu Al equipment ground lug
* Reduced maintenance on lighted units due to longevity of LED lamp

Aluminum Cables

Aluminum Cables



Aluminum is one of the most widely used metals for manufacturing different types of electrical cables. Aluminum light weight, good electrical conductance and corrosion resistant properties makes it perfect for making electrical cables and wires. Aluminum cables have diverse applications including different industries, factories, home, offices and almost everywhere.

Why Aluminum is suitable for making Electric Cable?

* High electrical conductivity: Aluminum has very high electrical conductivity. So it is good for making electrical cables.

* High ductility: Its ductility is very high which makes it perfect for drawing large wires.

* Light weight: Aluminum weighs about one third of copper, nickel, brass, and steel. Its specific gravity is 2.7. So the cables made of them are very light weight, hence suitable for long distance cabling. They are also useful in overhead cabling.

* High resistance to corrosion: Aluminum is resistant to corrosion which makes it perfect for manufacturing underwater cables.

* High strength: The high strength of aluminum prevent it from creeping even under high load.

* Economical: Aluminum is the most economical element and hence the cables are cheaper than copper, their nearest competitor.

* Physical properties: Aluminum is silvery white metal and highly reflective to heat and light. It is easily machinable and can have various surface finishes. It is easily recyclable.

* Non magnetic: Aluminum is non-magnetic in nature which is an important property for making armors and raceways.

Applications of Aluminum Cables

* High voltage power distribution: The transmission and distribution of high voltage lines over long distances are done with the help of aluminum cables. Almost in all such transmission across the world aluminum is the dominant material.

* Electrical energy distribution: Aluminum cables and wires are widely used in motors, electric lights, power systems and in numerous appliances. Today it has become the most efficient and economical way of transferring electric power.

* Energy cables: Aluminum is a light weight metal and it weighs about one-third of copper. One kilogram of aluminum cable is able to carry twice as much electricity as one kilogram of copper. Therefore, aluminum power lines are lighter and require little support structures.

Some other uses of Aluminum

* The substations or switch yards are made of aluminum. These substations are the places where electricity is stepped down to lower voltages for local distribution.

* The power systems of the world's largest buildings are made of aluminum. · Brass is replaced by aluminum as the standard base for electrical bulbs since 1950.

* Television antennae and many satellite dishes are made of aluminum.

Characteristics of Aluminum Cables

* The aluminum and its alloy cables loose some of their strength at very high temperatures (200-250°C). Though their ductility remain as it is at subzero temperature, which make it a useful material for cabling in colder regions.

* Aluminum alloy cables form a layer of oxide on themselves due to the reactions with atmosphere. These layers are corrosion resistant and they protect the material from acids, alkalies, other chemicals, and also weathering conditions.

* Aluminum cables have a tendency to loose its strength when repeatedly used so it needs extra care and protection during wiring in buildings.

Copper Clad Aluminum Wire
CCAW also known as copper-clad aluminum wire is a type of conductor composed of an inner aluminum core having outer copper cladding. Main applications of this wire is in those fields where weight of conductors is an issue. It is mainly used in making high quality light weight coils like the voice coils in headphones, portable loudspeakers or mobile coils and in similar other applications.

Properties of Copper-Clad Aluminum Wire include:

* They are lighter than pure copper.
* Their conductivity is higher than pure aluminum.
* Their strength is more than aluminum.
* They have better solder ability than aluminum.
* A little expensive than a pure aluminum wire.

Importance of Aluminum

* You can't imagine this world without aluminum. It has pierced in every field of our life. Without aluminum there would be no air travel, road travel, rail travel, or sea travel. Aluminum helps to construct corrosion resistant low maintenance buildings. In food processing aluminum foils are used to preserve the food quality.

* Earlier copper was the primary cable used in all electrical applications. But aluminum replaced copper conductors and in present scenario it is the most used conductor. It has now become almost 100 years that aluminum and aluminum alloy conductors have been used by electrical utilities for the transmission and supply of electrical power.

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
o Glass

Circuit Breakers

The circuit breaker is a popular and most important electrical device to ensure safety in the modern world. The circuit breaker is used to cut the power supply when an electrical wire has too much current flowing through it. Without these simple devices, household electricity would not be possible because of the chances for fire and short circuit resulting from simple wiring problems and equipment failures.

The device serves in the course of normal system operation to energize or de-energize loads. In case of conditions where excessive current develops, a circuit breaker opens for protecting equipment and surroundings from possible damage due to excess flow of current.

This automatically-operated electrical switch, unlike a fuse, can be reset (either manually or automatically) for resuming normal operation. These devices are made in varying sizes, right from small devices for protecting an individual household appliance up to large switchgear designed for protecting high voltage circuits feeding an entire city.

Circuit breakerCircuit breaker

Types of Circuit Breakers
There are different technologies being used for manufacturing different circuit breakers and it is difficult to categorize them into distinct categories. Different circuit breakers are used in domestic, commercial and light industrial applications at low voltage (less than 1000 V). These include:

* MCB (Miniature Circuit Breaker): The rated current of the device is not more than 100 A. These have thermal or thermal-magnetic operation... more

* MCCB (Moulded Case Circuit Breaker): The rated current of the device is up to 1000 A. These have thermal or thermal-magnetic operation.

Circuit Breaker Variants

* Magnetic Circuit Breakers: These are a type of circuit breakers that make use of a magnetic actuator to trip the circuit. These circuit breakers allow the current to flow through the electrical device and then pass through an electromagnetic actuator. When the current flow reaches a preset or pre-determined level, the magnetic field in the electromagnet is strong enough to trip the breaker and allow the contacts to open. A magnetic breaker needs to be manually set.

* Hydraulic Circuit Breakers: These are a popular type of circuit breakers designed for those applications requiring higher amperage and voltage handling capability.

* Thermal Circuit Breakers: A simple thermal circuit breaker allows the current to flow from a battery terminal, through the bi-metal strip and then to the other terminal. The bi-metal strip is made of two different types of metals, having different coefficients of expansion. This results in one metal expanding more than the other, in case of same rise of temperature. In this circuit breaker, when one metallic strips expands more than the other, and thus disconnects the contacts.
*


* Auto Reset Circuit Breakers: These circuit breakers re set automatically in case of a faulty load or circuit. These circuit breakers are widely used in case of leakage, short - circuit, surge or overload etc. Auto reset circuit breakers do not require manual assistance for re setting and cut off power supply in case of power trip. This power is than again restored after auto resetting.

High Voltage Circuit Breakers
There are electric power systems requiring the breaking of higher currents at higher voltages. It is such systems that high-voltage AC circuit breakers are used.

* Vacuum Circuit Breaker: The rated current of the device is up to 3000 A. These specialty circuit breakers interrupt the current by creating and extinguishing the arc in a vacuum container. These devices can only be practically used for voltages up to about 35,000 V, which corresponds to the medium-voltage range of power systems. These circuit breakers have longer life expectancies between overhaul than do air circuit breakers.
*


* Air Circuit Breaker: The rated current of the device is up to 10,000 A. Some of them are electronically controlled, while others are microprocessor controlled. These circuit breakers are used for main power distribution in large industrial plants.