POLYFUSE PPT FREE DOWNLOAD

Newer Post Older Post. Presentation Subjects Speech Ideas Projects. Like traditional fuses, PPTC devices limit the flow of dangerously high current during fault condition. The PPTC circuit protection devices are formed from thin sheets of conductive semi-crystalline plastic polymers with electrodes attached to either side. The preferred solution is a PPTC device which has low resistance in normal operation and high resistance when exposed to a fault.

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The equipment powered by a transformer get overheated due to excessive current or short-circuit. The Polyfuses are used by many industries in their devices.

Polyfuse | Resettable fuse Seminar Report

Polyfuse Published on Sep 21, The electrodes ensure the distribution of power through the circuit. Polyfuse is a new standard for circuit protection. Fuses protect the speaker, but a blown fuse is always a source of frustration. Resistors are rarely an acceptable solution because the high power resistors required are expensive. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. This makes each an ideal choice for protection in datacom ppt battery powered applications where momentary surges may occur during interchange of batteries or plug and play operations.

The Polyfuses electronic devices are always employed as a series element in a circuit. It is re-settable by itself. Over-charge results in an increase in the temperature of the electrolyte. Under normal operating conditions the heat generated by the device and the heat lost to the environment are in balance.

SEMINAR ON POLYFUSE

Each of these polyfuse series features low voltage drops and fast trip times while offering full resettability.

Electrical shorts and electrically overloaded circuits can cause over current and over temperature damage.

Therefore, there are possibilities of damage due to mismatches. Polyfuses is a new standard for circuit protection. Short time to trip 6. Thus a polyfuse acts like a self—resetting solid state circuit breakerwhich makes it suitable for providing low-cost over-protection device. Polyfuses is a new standard for circuit protection.

Many manufactures also call it as Polyswitch or Multifuse. If the current through the device is increased while the ambient temperature is kept pot, the temperature of the device increases.

Polyfuse Seminar PDF Report and PPT

The Polyfuse low resistance overcomes the additional series resistance introduced by the MOSFETs pklyfuse the low trip temperature can provide protection against thermal runaway in the case of an abusive overcharge. Nowadays speakers are designed and sold independently of amplifiers. Electrical shorts and electrically overloaded circuits can cause over current and over temperature damage.

Many manufacturers also call it PolySwitch or MultiFuse.

Topics For Seminar Back to the top. This site uses Akismet to reduce spam. Like traditional fuses, PPTC devices limit the flow of dangerously high current during fault conditions. One shot fuses can be used but they might fatigue and they must be replaced after a fault event.

The PPTC circuit protection devices are formed from thin sheets of conductive semi-crystalline plastic polymers with electrodes attached to either side. Each of these polyfuse series features low voltage drops and polyfue trip times while offering full resettability. Generally speaking, however, these devices are considered slow-trip fuses.

Polyfuse | Seminar Report, PPT, PDF for Applied Electronics

The resistance of polyfuse expressed on log scale at room temperature is a few ohms and rapidly increases above degree Celsius. In generalby increasing the heat transfer of the devicethere is a corresponding increase in power dissipation ,time to trip, and hold current.

These are available in voltage ratings of 30 to volts and current ratings of 20 mA to A. Polyfuse play a vital role in the charging and discharging cycles of batteries.