Addressing overcurrent issues for transient voltage surge. The response time of tvs diode clamping action is effectively instantaneous 1 x 109 seconds bidirectional. Surges have a number of origins, most notably lightning. Transient voltage stspt series surge suppressors by. Manufacturer of transient voltage surge suppressors including power strips with surge protection. A silicon transient voltage suppressor tvs is a circuit protection component that either attenuates reduces or filters a transient voltage spike overvoltage, thus protecting your circuit. Transient voltage surge suppressors product catalog.
The terms surge protection device spd and transient voltage surge suppressor tvss are used to describe electrical devices typically installed in power distribution panels, process control systems, communications systems. Once the gdt fires it becomes a crowbar device that can reduce the applied voltage down to a few tens of volts in nanoseconds, and is able to handle surge currents of 20ka or more for a single x s transient surge. Multiple mov technology with thermal disconnects to prevent catastrophic failure. A transient voltage suppressor or tvs is a general classification of an array of devices that are designed to react to sudden or momentary overvoltage conditions. Transient voltage surge suppression, ses200 series. The versatile and compact design provides high quality protection for a wide variety of commercial and industrial applications where sensitive electronic equipment is to be protected. Psytronics transient voltage protection systems psytronics. Psytronics has been a manufacturer of industrial surge suppressors since 1977. Transient voltage suppressors application note transient voltage suppressors tvs for automotive electronic protection application note by soo man sweetman kim, senior application manager a major challenge in automotive design is protecting electronics such as control units, sensors, and entertainment systems against damaging surges, voltage. Cutler hammer, div of eaton corp transient voltage surge suppressor. Model tss talon surge suppressors more tvss models. Determine a location where the connection wires will be installed and then drill a suitable hole in the zonemaster pro enclosure.
The installation of this transient voltage surge suppressor should be made by qualified personnel. Small and cost effective, model tss is designed to protect electrical distribution panels or other critical load applications within your facility. Micronote 5 1 failure mechanisms for transient voltage. A tvss ka rating is not the same as an electrical withstand rating. Surge arresters and transient voltage surge suppressors. This mov metal oxide varistor based surge protector is available in all standard lowvoltage ac configurations with surge current capabilities ranging from 25ka to 100ka. Spds are designed to clamp the excess transient voltage to safe levels sustainable by the equipment, yet should not interfere with the normal signalling voltages. For a given surge length, the expected number of pulses the mov can safely absorb during its lifetime is displayed. The ul 1449 standard was designed to reduce the risk of shock or fire hazard during tvss use, and applies to all tvss units. Tvss is the number one choice for surge suppression in new construction applications. Tvss guard against transient overvoltages, sometimes call transients, spikes or surges, hence the name transient voltage surge suppressor or tvss. The lm utilizes patented circuitry to monitor the status of all protection modes, including neutral to ground.
Surge suppressors are also commonly referred to as surge protection devices spd or transient voltage surge suppressors tvss. Vishay provides 400 w smf do219ab, 400 w smp do220aa, 600 w slimsma do221ac, and 1500 w smpc to277a tvs for the same 10 s surge conditions as the traditional 400 w sma, 600 w smb, and 1500 w smc tvs packages. Tpsa9040 shields motordriven appliances in residential and light commercial applications against electrical power surge damage, including lightning, from entering through the main electrical service panel. This barcode number lets you verify that youre getting exactly the right version or edition of a book. Stspt series series wired ac unit with sine wave tracking and discrete allmode protection power quality is our only business p. Micronote 3 repetitive surge on transient voltage suppressors 308. Transient voltage surges, sometimes called spikes, are shortterm deviations from a desired voltage level or signal, which can cause equipment malfunction or damage. This transient voltage suppressor diode has a pulse power rating of 1500 watts for one millisecond. Tvss transient voltage surge suppressor is a power quality device designed to protect electrical and electronic equipment from surges. Huge transient voltage surge suppressors inventory same day shipping expert technical support. Safety test constructed of approved components in a safe manner.
Tvss transient voltage surge suppression what is it and. Can either device be used for the same applications 128. Surge suppression is crucial to any power quality and power protection system, including lightning protection and three phases power systems. Transil, transient voltage surge suppressor tvs datasheet. Ratings are available from 25 ka 100ka per mode, 50ka 200ka per phase. A transient voltage surge suppressor also known as tvss is an older industry term which has been replaced in standards bodies by the term surge protective device or spd. Transient voltage surge suppressor electrical wiring. Designed to suppress transient surges before they effect sensitive loads with a built in highfrequency noise filter. Transient voltage surge suppressor tvss is a device that every data center or mission critical facility should have. The major advantage of these diodes is their very effective clamping, which comes closest to an ideal constant voltage clamp.
The ses200 series of transient voltage surge suppressors deliver specification grade performance and features at an affordable price. Standard for transient voltage surge suppressors, ul 1449. Stspt series series wired ac unit with sine wave tracking and discrete allmode protection p. These units come standard with indicating lights and dry contacts. Standard for transient voltage surge suppressors, ul 1449 isbn. We hold the patents and intellectual resources that have been leading the way in transient voltage surge suppression. Clamping voltage the clamping voltage of the surge suppressor should fall slightly below the withstand voltage of your equipment i. A dedicated twopole disconnect or breaker, 100 amp, 250 volt preferred, or 60 amp, 250 volt is required for this suppressor nonfused. About psytronics transient voltage protection systems. Silicon surge protector the products shown in this catalog are intended for use in standard applications requiring normal,commercial levels of reliability. Surge energy absorption in joules, 10us exceeds 455j. This document provides general procedures for the testing of surge protective devicestransient voltage surge suppressors for compliance with faastd019e, lightning and surge protection, grounding, bonding and shielding requirements for faa facilities and electronic equipment, section 4.
The need for surge protection has spawned the development of a wide variety of transient voltage surge suppression products. Since the diode maintains the avalanche voltage across a thin junction area during surge discharge, substantial heat is. Surge suppressor terminal blocks for surge voltage protection. Transient voltage surge suppressors are now classified as a surge protection devices spd per rdul 1449 3 edition spdare differentiatedby various types based on the location they are placed in the electrical system. Innovative technology products and technologies protect electrical, data, telecom circuits and electronic equipment from the effects of. Transient voltage surge suppression and surge protective. However, many surges are the result of switching loads or circuits on or off. Asis din rail surge suppressor terminal blocks within this segment of electrical and industrial surge protectors are categorized as follows. The pulse lifetime ratings are based on the definition of rated life, which is the point at which the nominal voltage of the mov has decreased by 10%. Transient voltage surge suppressor a device that diverts electrical surges to ground.
Pdf transient surge voltage suppressors and their performance in. The most advanced, costeffective product line in the industry. However, there are two points that must be considered when considering using gas discharge tubes. Transient voltage surge suppressor surge suppressors mouser.
Nema 4x clear plastic hermetically sealed lid, fiberglass cabinet. Eaton tvss critical ul 1449 update information on february 9, 2007, the underwriters laboratories standard for safety implemented major updates to the standards for all transient voltage surge suppressor tvss products. Features include surge protection indicator on surge devices, heavyduty cord from 3 ft. The transend is designed and tested to withstand surge. Upclamping voltagelet through voltage the maximum voltage that will remain, in the system, after a. Three samples of each brand were surge tested eight times in each mode ln, lg, and ng with ansiieee c62.
The varistor type surge voltage suppressors are lower cost devices but with poor protection. Transient voltage suppressors p6smb series features fast response time low incremental surge resistance matte tin leadfree plated halogen free and rohs compliant typical ir less than 1. One such common device used for this purpose is known as the transient. Siemens tpse1120 tps tvss transient voltage surge suppression device. Transient voltage surge suppressor surge suppressors are available at mouser electronics. Surge protection devices installed in new service entrance substations. Surge protection terminal blocks 2 wire type, for measuringcontrol systems. In other words, the purpose of a tvss is to minimize or eliminate damages to sensitive and critical equipment due to transient voltages.
Typical suppression at 50a using an 820 waveform ranges from 34v to 200v. Surge protective device transient voltage surge suppressor tvss. Our unique clamping effect has produced thousands of satisfied customers eliminating costly maintenance malfunctions of cnc machine tools and solidstate devices. A above 12v compatible with industrial standard package do214aa for surface mounted applications to optimize board space. Introducing model tss, talon surge suppressors, to our complete line of transient voltage surge suppression products. Why should every data center have one and what does it do you ask. They are devices used to prevent high voltage transients spikes on mains power supplies damaging electronic circuits. The lm is a surge protective device spd that offers continuous protection from damaging transients and electrical line noise. Sixdigit transientevent counter set to totalize transient surges. Transient voltage surge suppressors tvss thursday, may 19, 2011. A transient voltage surge suppressor is a device which is installed on an ac or dc power line to act as a cutoff if there is.