Tuesday, December 21, 2010

【 Weak current College 】 relay Guinness 】


Relay relay works solid-state relay time relays electromagnetic relay thermal relay intermediate relay ground relay voltage relay less voltage relay overvoltage relay AC voltage relay for DC voltage relay static voltage relay without auxiliary source static voltage relay voltage monitoring relay negative sequence voltage relay positive sequence voltage relay current relay SSR quiescent current relay without auxiliary source quiescent current relays electromagnetic current relays and DC current relay DC electromagnetic relay speed relay safety relays shock relay delay relay temperature relay relay coil start relay Relay relay horn relay pressure relay vehicle control relays and magnetic latching relay static intermediate relay rail installation relays directional relay small DC relay differential relay overcurrent relays reverse power relay glass semiconductor relay Telegraph vibration relay circuit protection relay dual-position relay Reed relay two-phase overcurrent relays the timed overcurrent relay electronic relay relay is an electronic controller, it has a control system (also known as the input circuit) and control system (also known as the output circuit), generally apply to automatic control circuit, it actually is a small current to control large currents in an "auto-switch". It plays in the circuit of automatic regulation, security protection, conversion circuits, etc. Solid state relays (also called solid state relay) the English name for the Solid State Relay, short for SSR. Solid state relays and electromechanical relays, is a mechanical movement, does not contain moving parts of the relay, but it has the electromechanical relays essentially the same function. SSR is a composition by solid state electronic contactless switching elements, he took advantage of the electronic components of electric, magnetic and optical properties for input and output of reliable isolation, use a high-power transistor and power MOSFET, one-way and two-way Silicon controlled rectifier devices such as switching characteristics, to achieve the non-contact, no spark to connect and disconnect charged circuit. Time relay is a kind of electromagnetic theory or mechanical principles implementation delay control control appliances. It's a great variety, air damping-, electric-type and e-type, etc. Electromagnetism relay armature by the electromagnet, in General, spring, contact, etc, its work low voltage control circuit circuit and high-voltage circuit two-part work. Thermal relay is flowing into the hot component, so that the current generation of heat have different expansion of bi-metal blade deformation, when a certain distance of deformation, the push-rod action so that the control circuit, allowing the contactor power failure, the main circuit, motor overload protection. Relay as motor overload protection component, with its small size, simple structure, low cost advantages in production is widely applied. Intermediate relay (intermediate relay): used for relay protection and automation systems, to increase the number and capacity of the contacts. It is used to pass in the control circuit intermediate signal. Transient ground fault relays for overcurrent relays act as earthed power systems and high voltage three-phase AC generator and motor of ground zero sequence overcurrent protection. Voltage relay is a type of actions according to the voltage value of the relay, voltage divided into less voltage relay, overvoltage relay two, divided according to the role of AC and DC voltage relay two; press types, there are no static voltage relays, auxiliary source static voltage relay, voltage relay, DC voltage relay, voltage monitoring relay, negative sequence voltage relay, positive sequence voltage relay, etc. Current relay is divided into: quiescent current relays, auxiliary source quiescent current relays electromagnetic current relay, AC and DC current relay, DC electromagnetic relays. Solid state relay SSR (solid state releys) is a contactless electronic switch-off, which utilizes electronic components (such as the switch transistor, TRIAC, semiconductor devices) switching characteristics, can be reached without contact and without spark plug and disconnect the circuit, for the four-side active devices, of which two terminals to enter the control-side, in addition to output controlled at both ends. Speed relay also known as reverse brake relay.  It's main structure is determined by the rotor, stator and contacts of three parts. Speed control relay is mainly used for three-phase asynchronous motor reverse brake control circuit, it is when the three-phase power supply phase sequence changes later, and the actual rotor rotation direction opposite of the rotating magnetic field, which produces brake torque. Safety relay is composed of a number of relays and circuit combination, as to be complementary to each other's shortcomings, to correct abnormal and low malfunction relays full function, so that their mistakes and failures, the lower the value, the higher the level of safety factors for you, so you need to design a variety of safety relay to protect different grades of machinery, main objective the protection of exposed to different levels of dangerous machinery operators. Impulse relays for electric power system direct current operation of the relay protection and control circuit, as the main component of the central signal. Time delay relay with pneumatic and electric, and watches. Temperature relay is when the outside temperature reaches a given values and actions of the relay. Relay coil refers to electromagnetic relays electromagnetic force in producing, control-contact action component. Start relay: startup key, through to start relay power, pick-up through to start the machine power, snap-action start gear, start driving flywheel turning machine running, start the engine. Relay relay is a kind of like activities contact the special control component, when the adoption of the current exceeding a "value", the connection is broken (or put), and let the current pass "interruption" of action and continued to deliberately affect the same circuit or other circuit component of the work. The horn relay: when you press the speaker button, the current will flow through the circuit to the horn relay electromagnetic coils, solenoid attracting relay contact switch closure of dynamic, current will flow to the loudspeaker.  Current speaker internal electromagnet, which makes vibrate vibration film sound. Pressure relays, hydraulic terminology, is a hydraulic system when fluid pressure reaches the predetermined value, so that the electric contact action component. Car control relay has two main parts, one is a control system, another is the control system. Control relay is a control function, because whenIts control system, enter a signal, such as electrical, magnetic, thermal, optical, physical quantity reaches a certain value, you can make the control system (also known as the output circuit) of the control from zero mutation to a certain value, or by a certain mutation to zero, so as to achieve control, protection, transfer and conversion information, etc. To high-current low current control is the control relay. Magnetic latching relay is recent years developed a new type of relay, is also an automatic switch. And other electromagnetic relays, circuit plays a role of automatic power up and cut off. The difference is that the magnetic latching relay normally closed or normally open State is dependent on the role of the permanent magnet, the switch status of the conversion by a certain width and pulse signals triggered. Static intermediate relay for a variety of protection and automation lines.  This type of relay by electronic components and precision components, relays, etc. is power series of intermediate relay replacement preferred products. Directional relay, applies in the direction of protection as the distinguishing element power direction, including LG-11-directional relay for white short circuit protection, LG-12-directional relay for grounding. Differential relays: as a protective device, differential relays from is located on the system of two different locations of current transformers provide feedback. Differential relays to compare to the current, if there are different then the protected area is at fault. These devices often are used to protect the generators or transformer windings. Overcurrent relays is inverse-time characteristics for generators, transformers and electricity transmission and distribution systems of relay protection equipment. In equipment overload or short-circuit, reliable predetermined time-frame, signal or the removal of failed parts. Reverse power relay refers to the relay with wattmeter, used to sense the current direction. Glass semiconductor relay is based on glass body effect of semiconductors made of relay. It is the main arsenic tellurium as semiconductor components for glass and oxides, boride glass thin film semiconductor via (evaporation, sputtering or hot pressing, etc.), in the film around small electrodes. Its main advantage is that the structure is simple, anti-radiation ability is strong, small power consumption.  Telegraph vibration relay has additional winding of Telegraph relay. When there is no normal winding line current is an additional incentive to winding keeper in the stop point between a regular vibration, so as to achieve the aim of improving the relay sensitivity. Line protection relay: a way to control aspects of relays in the input line to normal, with input and fault signal work; in the input line broken lines, short circuit protection. Dual-position relay is used for a variety of protection and automatic control system, and as toggle, locking elements, for blocking, and position indication. Reed relays: the use of sealing in tube, with an electric shock the Reed and armature magnetic double action of Reed's actions to open, closed or converting line relay. Inverse-time overcurrent relays is inverse-time characteristics for generators, transformers and electricity transmission and distribution systems of relay protection equipment. Electronic relays also known as the semiconductor time relays, use Semiconductor components made of time relays.

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