Search

The article discusses the application of transient voltage surge suppressor (TVSS) to prevent damage, breakdown and degradation to electrical and electronic equipment. TVSS protectors attempt to regulate the voltage supplied to an electric device by either shorting or blocking to ground voltage above a safe threshold.

The article focuses on polymeric positive temperature coefficient (PPTC) device and its applications. Such device helps protect against damage caused by both over-current surges and over-temperature faults, offers low resistance and compatibly sized with fuse solutions. It cites the difference between PPTC and ceramic PTC (CPTC) devices. PPTC devices are widely used in appliance designs, compliant with the UL 1434 standard and are compatible with lead-free solders and high-volume assembly process.

Presents information on safety measures in the use of power surge protectors. Information on accidents that can happen involving power surges and spikes; Suggestions on the purchase of a surge station for computers; Importance of checking the Underwriters Laboratory-approved label regarding the performance of the product; Tips on the handling of surge protectors according to the Consumer Product Safety Commission.

Provides information on electrical surge protectors. Prime component of a surge protector; Big surge protectors made by Lightning Master in Tampa; Surge protector from Radio Shack.

The article features several circuit protection devices, including the VC121085S15 high-voltage varistor from AVX, the MAX16914 and MAXI6915 overvoltage-protection controllers from Maxim Integrated Products, and the UT-6 TMC M line of circuit breakers from Phoenix Contact.

The article offers information on the uses of the overcurrent and overvoltage protection devices on the Power over Ethernet (PoE) devices. It provides insights on the advantage of overcurrent and overvoltage protection devices which asserts that it helps to protect both power-sourcing equipment (PSE) and powered device (PD) of PoE devices against voltage transients. It cites two categories of overvoltage protection devices which mentions the crowbar devices and clamping devices.

The article reports that the Powerpact R-frame molded case circuit breaker (MCCB) from Square D company is the first UL-489 listed MCCB available at the rating of 3,000 A. With this feature, R-frame circuit breaker could allow greater flexibility in industrial and commercial applications, and can be fitted into a variety of applications including feeders, main service and high-current branches.

The article features Maxim Integrated Products' MAX16008/MAX16009, window voltage monitors in a thin package. The devices are designed to monitor multiple supply voltages and activate a fault signal when any of the voltages exceeds its overvoltage thresholds or falls below its undervoltage thresholds.

The article features Bussmann Transportation Products' series of vehicle style electrical protection devices, including transorbs, resistors and diodes. It is designed with bladed terminals and packaged in compact rugged housings and can be installed into power distribution modules. It also provides voltage and electrical current limiting functionality for vehicle circuitry and assures both solid electrical and mechanical connections to the internal component.

This article presents information about the Ricoh's R1154N voltage regulator in a SOT23-5 package that has an input voltage range of 24V, supply current of 5µ A and maximum output current of 150mA. Output capacitor can be chosen to a minimum 0.1 µ F. Voltage adjustment with fixed types. Safety in the application is enhanced with peak and short circuit current limit and thermal overload protection.

Meech Static Eliminators has a pulsed direct current (DC) controller for ESD applications. The 233v3 has been designed to power any of the company's 200 series products and features the option of steady state DC output and the provision for connection to ion balance sensor and feedback systems. The extended balance adjustment enables operators to finely tune the ion balance to suit the task in hand and the extended pulse rate/frequency range of 0.5-20Hz provides static bars with greater effective reach. Secure control systems prevent inadvertent adjustment by operators after the unit has been installed and additional safety features include a built in alarm circuit, with auto shutdown if a fault is detected in the ionization system, preventing serious damage to the system.

Maxim Integrated Products Inc. has a current-mode pulse-width modulation controller which has a programmable switching frequency from 12.2kHz to 1.25MHz. The switching frequency is programmed using external resistors and internally trimmed to ± 4 per cent accuracy. The MAX5068's turn-on/turn-off voltages can also be programmed using external resistors. A fault-protection circuit is designed to prevent component overheating by turning off the power supply in the case of sustained over-current conditions or when there is a direct short circuit at the power-supply output.

Features Telemecanique Inc.'s single-pole control circuit protector which is resettable and has an interrupting capability of 5000 Amperes at 300 Volts maximum.