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Protection of TVSS Systems

From Ferraz Shawmut
 

 

Transient voltage surge suppressors (TVSSs) using MOV technology are widely used to protect power systems and components against the effects of transient overvoltages. However MOVs can fail explosively under certain conditions, and protection is needed. Thermal protectors provide protection against failure under sustained power-frequency overvoltages, and in the paper the requirements for and performance of a typical thermal protector are given. The role of a series fuse is discussed in detail, and alternative protection philosophies are compared, leading to recommendations for the fusing of TVSS systems. The development of a new range of fuses and their key performance characteristics are described. Finally the performance of MOVs and fuses with repetitive surges is compared and it is shown how these two components can complement each other in an integrated TVSS system.

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Fuses protect electrical devices and components from overcurrents and short circuits that occur in improperly operating circuits. Search by Specification | Learn more about Fuses
Fuse holders are devices for containing, protecting and mounting fuses. Blown fuses can be changed quickly and easily when used in conjunction with a fuse holder. Search by Specification | Learn more about Fuse Holders
Specialty electrical distribution and protection products are specialty or proprietary products related to electrical distribution and circuit protection. Learn more about Specialty Electrical Distribution and Protection Products
Product Announcements
Ferraz Shawmut - DIN-rail-mount transient-voltage surge suppressor
Ferraz Shawmut announces the availability of its new UL 1449 Third Edition approved Surge-Trap® Surge Protective Device (SPD) product line. This DIN-rail-mounted transient-voltage surge suppressor... (read more)
Bel Fuse Inc. - Type RJS Fuses
RJS Fuses are primarily intended for use in telecommunication circuit applications requiring low current protection with high surge tolerance. They are typically used to replace heat coil type... (read more)
Emerson Network Power / Liebert Power & Cooling - Liebert Type SS TVSS
Liebert Type SS offers a true, coordinated multi-stage system of suppression. It utilizes advanced SAD/MOV array technology for industry leading transient suppression voltages up to 160 kA surge... (read more)
Citel America, Inc. - SurgePurge 330
Citel's SurgePurge 330 model provides "Zero-margin" surge suppression capability for your facility's service entrance for both conducted (10/350µs) and induced (8/20µs) transient overvoltages... (read more)
Citel America, Inc. - SurgePurge 165
Citel's SurgePurge 165 model provides "high-risk" surge suppression capability at your facility's service entrance for both conducted (10/350µs) and induced (8/20µs) transient overvoltages originating... (read more)
Citel America, Inc. - DS-HF - Secondary Surge Protector
Citel's DS-HF is a secondary surge protector for especially sensitive equipment. The "surge protection" function is completed by RFI filtering. (read more)
Hitech (HK) Co., Ltd. - GDT / Gas Arrester / Surge Arrester
GDT / Gas Arrester / Surge Arrester UL Certification for our GDT and MOV:... (read more)
Energy Control Systems - Transient Voltage Surge Suppressors
Protect your critical, vital electronic systems with the most advanced suppression technology available today. (read more)
Citel America, Inc. - DS250VG High-Energy AC Surge Protection Module
CITEL, INC. introduces the DS250VG protection module for single and three phase AC power line applications. CITEL component engineers have developed a specially designed Gas Discharge Tube (GDT) that... (read more)
TLC Electronics - Thermally Protected Varistors
World Products Inc. TVZ series is a two or three-leaded Thermally Protected Metal Oxide Varistor available from authorized distributor TLC Electronics, Inc. (read more)
Topics of Interest
Metal Oxide Varistors (MOVs) are commonly used to suppress transients in many applications such as: Transient Voltage Surge Suppressors (TVSS), Uninterruptible Power Supplies (UPS), AC Power Taps, AC... (Read More)
Littelfuse offers specific Varistors and Classes of Fuses to address over-voltage and over-current transients in the Industrial environment. This application area is typically characterized as AC... (Read More)
This guide is similar to "The ABCs of MOVs", offering specific information on Multilayer suppressor device technology and is intended to be a supplement to the Littelfuse Multilayer data sheets. As... (Read More)
A. Haddad 5.1 Introduction High voltage systems are often subject to transient overvoltages of internal or external origin. The resultant surges travel along the transmission line and can cause... (Read More)
UL 1449 is a standard that covers transient voltage surge suppressors (TVSS) intended for permanently connected, cord-connected and direct plug-in applications. UL Standard 1449 established various... (Read More)
See more product announcements for Fuses
Get Control of Your Plant's Assets

Get Control of Your Plant's Assets
Ferraz Shawmut


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HIGH VOLTAGE FUSES
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Industrial Fuses, Fuse Holders, Fuse Blocks -

Industrial Fuses, Fuse Holders, Fuse Blocks -
Automationdirect.com


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