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Topic: Magnetic circuit breaker

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Circuit breaker

	Circuit breaker - Wikipedia, the free encyclopedia
		Magnetic circuit breakers are implemented using a solenoid (electromagnet) whose pulling force increases as the current increases.
		Thermomagnetic circuit breakers, which are the type found in most distribution boards, incorporate both techniques with the electromagnet responding to short, large surges in current (short circuits) and the bimetallic strip responding to less extreme but longer-term overcurrent conditions.
		Circuit breakers for larger currents are usually arranged with pilot devices to sense a fault current and to operate the trip opening mechanism.
	en.wikipedia.org /wiki/Circuit_breaker (3001 words)

	Circuit breaker - Patent 4110717
		The circuit breaker also includes an improved collapsible linkage for permitting opening and closing of the breaker circuit in response to manual movement of an operating handle and for permitting automatic opening of the breaker circuit when the linkage is tripped on the occurrence of an overload current in the circuit.
		Where the circuit breaker 10 is adapted for shunt-trip type of circuit breaker operation as shown, an additional terminal 52 is extended through the bottom opening 38 in the housing 12 and tabs 52.1 on that terminal are deformed around a pair of the abutments 48 adjacent the opening 38.
		Circuit breaker components mounted in the chamber 28 of the circuit breaker 10 previously described are mounted in each of the chambers 28 of the circuit breaker 166 as shown in FIGS.
	www.freepatentsonline.com /4110717.html (12075 words)

	Circuit breaker magnetic trip unit - Patent 4771254
		The magnet portion is generally U-shaped in configuration and surrounds the circuit breaker load strap or the thermal element and responds in a manner similar to that of a conventional U-shaped "slot motor" wherein the magnetic forces induced within the magnet are concentrated at the ends of the magnetic arms.
		The magnetic force of attraction between the armature and the magnet is such that the minimum magnetic force occurs at the instant of short circuit overload since the magnet and the armature are at their furthest distance apart and the high reluctance air gap at this time is a maximum.
		A magnetic trip unit for molded case circuit breakers wherein a magnet is arranged around the load strap at one end of the breaker in magnetic proximity to a second magnet arranged around the armature strap.
	www.freepatentsonline.com /4771254.html (2787 words)

	CBI -- Technology: Hydraulic Magnetic
		Hydraulic Magnetic Circuit Breakers operate on the magnetic force produced by the load current flowing through a series connected solenoid coil which is wound around a hermetically sealed tube containing an iron core, a spring and a dampening fluid.
		At currents below the circuit breaker rating, the magnetic flux in the solenoid is insufficient to attract the core towards the pole piece due to the spring pressure.
		With high values of overloads or short circuit, the magnetic flux produced by the coil is sufficient to attract the armature to the pole face and trip the breaker even though the core has not moved.
	www.cbibreakers.com /magnetic.asp?menu=sixth (344 words)

	Magnetic circuit breaker - Hutchinson encyclopedia article about Magnetic circuit breaker (Site not responding. Last check: 2007-08-31)
		Circuit breakers usually work by means of magnetic-type relays or solenoids.
		When a current exceeds a fixed limit as it flows through the magnetic coil of a circuit breaker, a triggering mechanism is released, pulling the contacts apart and opening the circuit, thus preventing any more current flowing.
		Circuit breakers have many advantages; for example, they are fast acting, can be adjusted to operate at different current values, and can be easily reset.
	encyclopedia.farlex.com /Magnetic+circuit+breaker (217 words)

	P11 Circuit Breakers (Site not responding. Last check: 2007-08-31)
		Circuit breakers are used in virtually every type of residential, commercial or industrial electrical distribution system.
		A thermal-magnetic circuit breaker has two trip mechanisms in addition to the on/off switch: a bimetal strip that heats up and bends as the power drawn exceeds the rating of the breaker.
		A breaker must be rated to handle at least the highest amount of current that could be available in the circuit.
	www.argo.ca /p11_circuit_breakers_.html (587 words)

	Electronic Products
		Thermal circuit breakers are useful in applications having high surge currents or where high current inrushes accompany the start of electric motors, transformers, and solenoids.
		Typically, these circuit breakers are used in aerospace, defense, and heavy-duty applications involving high vibration and mechanical shock.
		Although certain devices such as UL 489 molded-case circuit breakers have higher interrupting capacities, they may not be well suited for lower current applications where precise overload protection and adequate short-circuit protection is better provided by a UL 1077 supplementary protector.
	www.electronicproducts.com /print.asp?ArticleURL=octeta1.oct2002 (877 words)

	Heinemann Tec_E
		Another weakness to be mentioned compared with the hydraulic-magnetic breakers described later is the relatively high internal resistance generating a voltage drop at the terminals of the circuit breaker.
		In the event of a large overload or of a short circuit, the magnetic field generated by the coil is in itself sufficient to attract the armature without the position of the core being changed.
		Mechanical circuit breaking devices have been developed in such a way that breaking the circuit cannot be prevented from outside the device, and manual re-closure in the event of a short circuit is rendered impossible.
	www.rowehankins.com /Heinemann/Hnmn_tec_e.html (1810 words)

	Circuit Breaker, Continued
		Circuit breakers that are to be used in circuits that
		The circuit neutral is connected to another terminal on
		being connected to its fuse or circuit breaker.
	www.tpub.com /content/construction/14026/css/14026_170.htm (540 words)

	Magnetic Circuit Breaker
		Memshield 2 circuit breaker switches are ideally suited to: Semi-automatic (magnetic only) Non-automatic operation where MCCB accessories and/or compatible size is required...
		A circuit breaker is designed to keep an undesirably large amount of current, voltage, or power out of a given part of an electrical circuit.
		The hydraulic/magnetic circuit breaker is. considered to be temperature stable and...
	www.1st-electricalsupply.com /45/magnetic-circuit-breaker.html (394 words)

	CIRCUIT BREAKER
		A circuit breaker's function is, like a fuse, to break a circuit path when a predetermined amount of current is passed.
		When the current flow reaches a preset level (determined by the current rating of the breaker), the magnetic field in the electromagnet is strong enough to trip the breaker and allow the contacts to open.
		In the combination breaker, the bi-metal strip is more likely to be used to trip the breaker internally (by tripping the latch) instead of pulling the contacts apart when heated.
	www.angelfire.com /ab6/userper/cb.htm (752 words)

	circuit breaker and circuit breaker resources, circuit breaker wiring, circuit breaker operation
		Circuit Breaker Industries (CBI), located near Johannesburg, South Africa, is amajor manufacturer of electrical distribution and protection components for.
		Circuit breakers act to limit the current in a single circuit in most circuit breaker.
		Vacuum Circuit Breaker Replacements for GE Magne blast medium voltage circuitbreakers for nuclear power industry for safety and other reasons to upgrade to.
	www.orakelweb.org /circuit+breaker.html (341 words)

	Heinemann Electric Canada Ltd.
		Heinemann hydraulic-magnetic circuit breakers are available in both AC and DC ratings in accordance with UL, CSA and VDE standards.
		The hydraulic-magnetic circuit breakers may be configured with a variety of non-delayed or time-delayed trip characteristics.
		Heinemann breakers are available in circuit configurations such as the commonly-used Series Trip; Dual Rating for tripping at two discrete current ratings; Relay Trip for remote trip actuation isolated from the line voltage and Shunt Tap for remote tripping using the line voltage.
	www.heinemann-electric.com /t-p-circuit-breakers.htm (287 words)

	circuit breaker on GlobalSpec
		Miniature Circuit Breakers The high quality DIN rail circuit breakers offered by ASI are available in configurations to meet virtually all industrial circuit protections applications from supplemental (UL1077), branch circuit (UL489) or DC circuit protection.
		First Lead-free Fuseholder Style Circuit Breaker Schurter’s new T9 series circuit breaker for equipment is RoHS compliant and is free from lead and other hazardous materials The new design is equipped with the same proven features, such as fuseholder body style, snap-in mounting (5/8” or 16mm diameter hole), and push-to-reset button.
		A-Series Hydraulic/Magnetic Circuit Breaker The A-Series hydraulic/magnetic circuit breakers are compact and temperature stable designed for precision operation in OEM markets requiring general purpose as well as full load amp applications.
	electronic-components.globalspec.com /Industrial-Directory/circuit_breaker (1622 words)

	PHOENIX CONTACT \| Products \| (IEC) Terminal Blocks \| Compact Thermal-Magnetic Circuit Breaker (Site not responding. Last check: 2007-08-31)
		Thermal-magnetic circuit breakers have a thermal circuit interruption function and a magnetic interruption function.
		Thermal circuit breakers use heat-sensitive bimetallic elements that respond to overload electrical currents.
		Specify the breaker knowing the maximum fault current that can be repeatedly (3x minimum) interrupted without failure of the breaker.
	www.phoenixcon.com /products/terminalblocks/circuitbreakers/indexmain.asp (241 words)

	Electronic Products
		The hydraulic/magnetic circuit breaker is considered to be temperature stable and thus is not appreciably affected by changes in ambient temperature like the thermal protectors.
		The characteristics of a hydraulic/magnetic circuit breaker can be tailored in four separate areas: the desired circuit; the trip point (in amperes); the time delay (in seconds); and the inrush-handling capacity of the breaker.
		Typically, hydraulic/magnetic circuit breakers are available with a choice of three different trip-time delay curves: slow, medium, and fast.
	www.electronicproducts.com /ShowPage1.asp?SECTION=&PRIMID=10757&FileName=SEPCAR1%2ESEP2003&Manufact=Carling+Technologies&ReturnLink=%2FSearch1%2Easp%3FManufacturer%3D%26Keyword%3Dfuse%26Slot%3D1%26StartNum%3D1%26stype%3D%26year%3D10&MonthYear=Sep+2003 (670 words)

	Carling Technologies: Manufacturer of Switches & Circuit Breakers
		The SmartGuard is an equipment ground fault protection device that functions as a standard high quality hydraulic magnetic circuit breaker offering customized overload and short circuit protection, while also detecting and guarding against faults to ground using a state of the art integrated circuit developed by Carling Technologies.
		When a fault occurs, this breaker trips and an LED illuminates giving a clear indication that the trip occurred as a result of leakage.
		They may also contain auxiliary devices such as surge suppressors, ground fault circuit interrupters, power receptacles, etc. A PDC is usually supplied by the main feeder and then divides the power into smaller branch circuits.
	www.carlingtech.com /company/product_history.asp (655 words)

	China Circuit Breakers Product directory - china manufacturers, exporters, factories, suppliers, traders, wholeslers, ...
		This breaker is mainly used in electric power system with rated frequency of AC 50Hz, rated voltage up to 690V and rated...
		This circuit breaker is designed for human indirect contact protection and over current protection in circuit of AC 50Hz...
		Motor protection circuit breaker are mainly used for the overload and short circuit protection of the motor in AC 50/60Hz...
	chinasuppliers.alibaba.com /products/china/141914/Circuit_Breaker.html (797 words)

	E-T-A Circuit Breakers - Contact Details and Latest News - Electronicstalk
		A new version of an award winning magnetic circuit breaker offers remote disconnection by means of a sensor or control circuitry.
		E-T-A Circuit Breakers has released new colour coded versions of its blade-type circuit breakers for fuse replacement in all types of vehicle from cars to trucks, buses and off-road applications.
		The E-T-A 8345 magnetic circuit breaker for equipment is the highest current carrying device of its type available.
	www.electronicstalk.com /news/eta/eta000.html (660 words)

	Carling Tech: Hydraulic, Magnetic & Thermal Circuit Breakers
		The SmartGuard Equipment Leakage circuit breaker is an equipment ground fault protection device that functions as a standard high quality hydraulic /magnetic circuit breaker offering customized overload and short circuit protection, while also detecting and guarding against faults to ground using a state of the art integrated circuit developed by Carling Technologies.
		When a fault occurs, this breaker trips and an LED illuminates providing a clear indication that the trip occurred as a result of leakage.
		With the ROCB, the convenience of remote ON, OFF and Reset capability has been combined with the safety and accuracy of a standard magnetic current sensing device, allowing operation of the circuit breaker from various locations in a system, facility or site (while not sacrificing the ability to manually operate the breaker if required).
	circuit-breakers.carlingtech.com (306 words)

	Zlan -- Breaker Info (Site not responding. Last check: 2007-08-31)
		Mechanical tolerances that affect both the thermal and the magnetic trip limits.
		In contrast, the Zlan circuit breaker employs state-of-the-art electronic circuitry to distinguish between normal current transients and abnormal short circuits.
		By opening the circuit in a fraction of a second after detecting an overload, the Zlan breaker significantly reduces the chance for electrical sparks which can start a fire.
	www.zlan.com /brk_info.htm (251 words)

	Hydraulic-magnetic circuit breakers for equipment - Retron - Dataweek
		The family is divided in four different mounting forms and sizes for front panel mounting as well as for DIN-rail mounting.
		The circuit breakers cover 1- to 3-pole, current range of 0,1 to 100 A. All types are available with different tripping characteristics, finely graded currents as well as with different internal switching options such as parallel tripping, dual control, alarm switch, auxiliary switch or relay tripping.
		Hydraulic-magnetic circuit breakers for equipment with time-lag tripping characteristics are suitable to protect motors, solenoids, relays or installations.
	www.dataweek.co.za /news.asp?pklNewsID=15816&pklIssueID=452&pklCategoryID=79 (196 words)

	Welcome to BBW ! Magnetic Circuit Breaker
		"A" frame breakers are designed to have long trip delays to avoid nuisance tripping.
		"C" frame breakers are suitable for use in any situation where precision operation is required.
		We reserves the right to substitute a specified manufacturer's product listed with an equivalent product, if the listed manufacturer's product is not available at the time of the order.
	bestboatwire.com /catalog/default.php?cPath=96 (336 words)

	carlingswitch hydraulic magnetic circuit breakers from techna, uk.
		These hydraulic magnetic circuit breaker ranges are available in a variety of styles including the recently introduced push to reset and push pull breaker.
		The hydraulic magnetic circuit breaker enables accurate, temperature insensitive, specification of the tripping characteristics, ideal for equipment protection and for machines that must operate in a variety of climatic conditions.
		Miniature circuit breaker available with push to reset, push pull, solid colour rocker or handle actuator; LED or neon bulb illuminated and visi-rocker two colour rocker actuators.
	www.techna.co.uk /carlingbreaker.html (431 words)

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