TVSS Why do you need it?

T.V.S.S. Why do you need it?

TVSS is recognised as key to solving transient related power quality problems. Small businesses, multinational corporations, military branches and defence reasearch facilities world-wide have learned that their initial investments in TVSS can be quickly returned by reducing equipment damage, decreasing maintenance costs and improving systems uptime.

Protect against Disruption, Degradation, Damage, Downtime

Transient Sources

System Coverage

MEM System Shield® Protection

MEM System Shield® Protection Components

The I.T. Protector®

Contact Details

Transient Sources

Transients are brief over voltages or over currents, typically lasting just microseconds, caused by external and internal events. Lightning, power company grid switching, load switching by neighbouring factories, and variable speed drives are a few of the causes of such power disturbances. Transient voltages range from just a few volts to over 20,000 volts, with surge currents in excess of 10,000 amps, as defined by ANSI/IEEE C62.41-1991, and can occur up to 432,000 times per hour in extremely active industrial environments.

Internally Generated Transients		Externally Generated Transients
Up to 80% of transients are generated from internal load switching and the normal operation of equipment, such as the switching on and off of copiers, air-conditioning systems etc. to robotic assembly and welding machines. This can cause:		Up to 20% of transients are generated from external sources such as lightning (direct or indirect), power company grid switching and electrical interference from other local industry. This can cause:
Cumulative damage Premature equipment failure Data losses and system resets PLC control failures Downtime, lost business and opportunities Burnt out printed circuit boards Frequent failure of lamps and fluorescent ballasts Frequent motor rewinds Uninterruptible power supply failure		Catastrophic equipment failure Immediate operation shutdown Long term disruption of business Expensive repair and replacement costs Downtime, lost business and opportunities Burnt out printed circuit boards Frequent failure of lamps and fluorescent ballasts Frequent motor rewinds Uninterruptible power supply failure

The Solution ... MEM System Shield Protection

I.T. (Innovative Technology), part of the Delta Group, continues to lead the world-wide transient voltage surge suppression industry with new, innovative protective devices, responsive customer service and the most comprehensive system wide protection plan available. From service entrance to individual load circuits, the MEM System Shield® provides integrated suppression for all electrical and electronic equipment and systems. Through strategic placement of TVSS within the power system, co-ordinated protection is put into place to effectively close all paths that damaging transients may take to mission-critical equipment.

Advanced field proven circuit designs, like the Threshold Suppression Network (TSN®) and Active Tracking Network (ATN®) address and suppress transients across a wide range of frequencies, amplitudes and phase angles. MEM products offer standard features such as high peak surge current levels, low let-through voltage levels and advanced electro-chemical encapsulation technology to provide unsurpassed durability for a lifetime of effective service. Features such as remote alarm capability and IP66 weatherproof enclosures provide application flexibility meeting the widest possible range of requirements. State of the art designs include advanced filtering circuits that remove the disruptive high frequency noise and low level transients responsible for processing errors and system reset requirements.

The MEM System Shield® and its components continue to evolve, embracing and defining new technologies to face the challenges of today and tomorrow's commercial and industrial surge suppression needs.

Contact Details

System Coverage

Main Switchboard Locations
The Protector® units installed at high exposure service entrance locations provide the first line of defence. Here, transient amplitudes are suppressed to levels that subsequent layers of the MEM System Shield® can eliminate.

Sub-distribution Board Locations
The Protector® units installed at these high to medium exposure locations provide the second layer of defence against externally-generated transient activity as well as suppression of much more prevalent (80%) internally generated transients.

Final Distribution Board Locations
Typically, sensitive and critical load equipment is fed from these highly important branch panels. The Protector® units installed at branch panel locations are designed to address changing transient characteristics, via the Active Tracking Network (ATN®).

Telecom and Data Circuits
Telecom and data circuits are extremely vulnerable to transients, especially at building entry points. Even relatively low energy transients can take down computer, LAN, telephone and other systems. The models of the Protector® installed at these locations provide the best possible protection for these sensitive and mission-critical systems.

Contact Details

MEM System Shield Protection®

ANSI/IEEE C62.41-1991 separates a typical facility into three exposure categories, each characterised by differing types of transient wave shapes, voltage/current levels and by transient source.

The category locations illustrated here (C, B & A) serve as the basis for a simplified explaination of the MEM System Shield®.

Protected Facility VS Unprotected Facility

MEM System Shield® Protected Facility		Unprotected Facility
Category C Locations Category C locations are subject to heavy, externally generated impulse transients resulting from events such as lightning, power company grid switching, power system faults, severe weather and neighbouring facilities.

Category B Locations Category B locations are subject to a mixture of externally generated impulse transients and internally generated switching/ring wave transients generated by a broad spectrum of load equipment such as motors, environmental control equipment, manufacturing and office equipment.

Category A Locations Category A locations are subject to a high level of switching/ring wave transients generated from a wide variety of load equipment, including office equipment and commercial and industrial manufacturing systems.

Typical path of internally generated transients		Typical path of internally generated transients
MEM System Shield® Protected Facility		Unprotected Facility

Key to Diagram
	Open arrows represent flow of externally generated transients
	Solid red arrows represent flow of internally generated transients
	White P within red area represents the Protector® unit locations reducing the strength of transient voltage surges
	Red "zap" symbols represent location of transient voltage surges

Every MEM System Shield® protection plan is tailored to fit customer requirements. Your local independent MEM distributor can provide you with a comprehensive, facility-wide audit, including electrical system layout, load equipment mixture and system exposure levels. This risk assessment forms the basis for product selection and application to assure installation of the most effective MEM System Shield® possible.

Contact Details

MEM System Shield® Protection Components

The I.T. Protector® AC Power Panel Models

Innovative Technology manufactures a wide variety of AC power panel models of the I.T. Protector®. These parallel connected units feature high peak surge current ratings and exceptionally low measured limiting
(let-through) voltage characteristics.

Models are available in all popular AC voltage ranges, including single phase, split phase, three phase star and three phase Delta system configurations. Models featuring enhanced all mode protection provide dedicated component circuits to ensure that all power related transient paths into your premises are protected. Integral dry relay contacts are standard, making remote status monitoring easy. IP66 rated weatherproof enclosures increase application flexibility and assure reliable unit performance, even in harsh environments.

Durable, rugged field proven design, easy installation and up to a 20 year Free Replacement Warranty on standard models make the I.T. Protector® a superior performer in AC power panel surge suppression.

Individual Load Circuit Protection Models

HS models are designed for installation on critical and sensitive individual load equipment.

These models feature advanced multistage hybrid circuitry and Active Tracking Network (ATN®) technology, providing superior transient suppression and EMI/RFI attenuation. Integral RJ11/RJ14 sockets for telecom line protection and volt free alarm relay contacts are standard for the HS-P-SP models.

Contact Details

The I.T. Protector®

Transient Voltage Surge Suppressor (TVSS) From MEM

Note: Model illustrated features optional S.M.A.R.T. diagnostics package.

Features and Benefits

Parallel Wired Models
Standard Features	Benefits
Advanced Surge Path Technology ™	All surge paths are surge current-rated far in excess of highest known magnitude transients and are designed for ultra low impedance and conduction of high frequency transients. All surge path connection points are soldered in order to establish and maintain the lowest possible impedance.
Advanced Encapsulation Technology	All components are encapsulated within an advanced electrochemical compound, which dramatically extends component life expectancy and eliminates degradation due to the adverse effects of weather, chemicals, vibration and impact in the harshest of environments.
Threshold Suppression Network (TSN) ™	Independently tested and verified to withstand up to 16,000 ANSI/IEEE C62.41 CAT C3 (20kV, 10kA) impulses, at one minute intervals with no failure and measured limiting voltage drift of less than 6%. This prevents an unequalled benchmark in the industry.
UL1449 Second Edition & UL1283 Listed	Provides highest available level of third party verification of device safety and performance.
Up to Twenty Year Free Replacement Warranty	Strongest warranty in the industry.
Optional Features	Benefits
Multi-Stage Hybrid Active Tracking Network (ATN®)	Provides unsurpassed suppression of switching generated ring wave transients and Tracking Network (ATN®) excellent high energy impulse transient response for protection of sensitive and critical equipment.
Enhanced All mode Protection ™	Assures all possible transient paths to load equipment are covered. Provides highest level of load equipment protection.
System Monitoring And Reporting Technology™ (S.M.A.R.T.™) Advanced Diagnostics	Comprehensive dual mode monitoring of critical system functions. Real time audible and visual reporting of unit status, phase loss/protection loss, transient events (reset and alarm mute) and event history recording for trend analysis.
IP66 Rated Steel Enclosures	Allows weather proof installation in the most demanding industrial and commercial environments.

Series Wired Models
Standard Features	Benefits
Enhanced All Mode Protection ™	Provides dedicated suppression components for all possible transient paths.
Series Wired Configuration	Series connection provides superior dedicated load circuit protection and minimal internal lead length for optimum Measured Limiting (Let-Through) Voltage.
Compact Size	Compact size allows close proximity mounting with maximum application and installation flexibility in space restricted locations such as equipment racks, motor control cabinets and OEM applications.
Data/Telecom Protection	Protection for critical one or two pair lines. Prevents damaging transients from entering systems through the ëback doorí. Prevents damage to dedicated low voltage level circuits. (HS-P-SP model range only).
Advanced Encapsulation Technology	All components are encapsulated within an advanced electrochemical compound, which dramatically extends component life expectancy and eliminates degradation due to the adverse effects of weather, chemicals, vibration and impact in the harshest of environments.
Remote Alarm Capability	Allows remote signalling of suppression circuit status for continuous monitoring of suppression system at even the most remote locations. (HS-P-SP model range only).
Multi-Stage Hybrid Active Tracking Network (ATN®)	Provides unsurpassed suppression of switching generated ring wave transients and excellent high energy impulse transient response for protection of sensitive and critical equipment (HS-P-SP and HS model ranges only).
EMI/RFI Attenuation	Reduces the disruptive effects of conducted voltage and interference.
Ten Year Free Replacement Warranty	Strongest warranty in the industry.

Contact Details

	Eaton MEM
Telephone:	0121 685 2100	+44 121 685 2100
Facsimile:	0121 706 2012	+44 121 706 2012
Address:	Eaton MEM, Reddings Lane, Birmingham B11 3EZ - United Kingdom
E-mail: ukcommorders@eaton.com
UK Sales Contacts & Distributors
MEM Worldwide