SURGE SURGE SURGE SURGE PROTECTIONPROTECTIONPROTECTIONPROTECTION

5. Protect incoming AC power feeders

6 Protect low voltage data/telecommunication circuits6. Protect low voltage data/telecommunication circuits.

Standards – LP and SP

Standard TitleIEC 62305-1 Protection Against Lightning - Part 1: General PrinciplesIEC 62305-2 Protection Against Lightning - Part 2: Risk Management IEC 62305-3 Protection Against Lightning - Part 3: Physical Damage to Structures and Life Hazard IEC 62305-4 Protection Against Lightning - Part 4: Electrical and Electronic Systems within StructuresIEC 61643-1 Low-Voltage SPDs - Part 1: SPDs Connected to Low-Voltage Power Distribution Systems - Requirements and Tests IEC 61643-12 Low-Voltage SPDs - Part 12: SPDs Connected to Low-Voltage Power Distribution Systems - Selection and Application PrinciplesIEC 61643-12 Low-Voltage SPDs - Part 12: SPDs Connected to Low-Voltage Power Distribution Systems - Selection and Application Principles IEC 61643-21 Low Voltage SPDs - Part 21: SPDs Connected to Telecommunications and Signalling Networks - Performance Requirements and Testing MethodsIEC 61643-22 Low-Voltage SPDs - Part 22: SPDs Connected to Telecommunications and Signalling Networks - Selection and Application PrinciplesIEC 61643-311 Components for Low-Voltage Surge Protective Devices - Part 311: Specification for Gas Discharge Tubes (GDT) IEC 61643-321 Components for Low-Voltage Surge Protective Devices - Part 321: Specifications for Avalanche Breakdown Diode (ABD) IEC 61643-331 Components for Low-Voltage Surge Protective Devices - Part 331: Specification for Metal Oxide Varistors (MOV) IEC 61643 341IEC 61643-341 Components for Low-Voltage Surge Protective Devices - Part 341: Specification for Thyristor Surge Suppressors (TSS)BS 6651 Now Replaced by BS EN 62305 Series!BS EN 50164-1 Lightning Protection Components (LPC) - Part 1:Requirements for Connection Components BS EN 50164-2 Lightning Protection Components (LPC) - Part 2: Requirements for Conductors And Earth Electrodes BS EN 50164-3 Lightning Protection Components (LPC) - Part 3: Requirements for Isolating Spark GapsIEEE C62.41.1 Guide on the Surge Environment in Low-Voltage (1000 V And Less) AC Power Circuits IEEE C62.41.2 Recommended Practice on Characterization of Surges in Low-Voltage (1000 V and Less) AC Power CircuitsIEEE C62.45 Recommended Practice on Surge Testing for Equipment Connected to Low-Voltage (1000 V And Less) AC Power CircuitsIEEE C62.43 Guide for the Application of Surge Protectors Used in Low-Voltage Data, Communications, and Signaling CircuitsIEEE C62.72 Guide for the Application of Surge-Protective Devices for Low-Voltage (1000 V or Less) AC Power CircuitsIEEE C62.xx.yy Many, many additional Surge Standards, especially on ComponentsUL 1449 Transient Voltage Surge SuppressorsUL 1449 Transient Voltage Surge SuppressorsNFPA 780 Standard for the Installation of Lightning Protection SystemsUL 96A Installation Requirements for Lightning Protection SystemsUL 96 Lightning Protection ComponentsAS/NZS 1768 Lightning Protection [and Surge Protection]ITU K series Many standards for testing and applications for Telecoms Protection

Standards – Surge Protectiong

Standard TitleIEC 62305-1 Protection Against Lightning - Part 1: General PrinciplesIEC 62305-4 Protection Against Lightning - Part 4: Electrical and Electronic Systems within StructuresIEC 61643-1 Low-Voltage SPDs - Part 1: SPDs Connected to Low-Voltage Power Distribution Systems - Requirements and Tests IEC 61643-12 Low-Voltage SPDs - Part 12: SPDs Connected to Low-Voltage Power Distribution Systems - Selection and Application Principles IEC 61643-22 Low-Voltage SPDs - Part 22: SPDs Connected to Telecommunications and Signalling Networks - Selection and Application PrinciplesIEEE C62.41.2 Recommended Practice on Characterization of Surges in Low-Voltage (1000 V and Less) AC Power CircuitsUL 1449 Transient Voltage Surge SuppressorsAS/NZS 1768 Lightning Protection [and Surge Protection]

Consequences of unprotected Power Systems!Power Systems!

Consequences of unprotected Power Systems!Power Systems!

Insulation failure due to overvoltage surge

Why are SURGES a problem?problem?

Proliferation of microprocessors EVERYWHERE:Proliferation of microprocessors EVERYWHERE:Proliferation of microprocessors EVERYWHERE:Proliferation of microprocessors EVERYWHERE:Proliferation of microprocessors EVERYWHERE:Proliferation of microprocessors EVERYWHERE:Proliferation of microprocessors EVERYWHERE:Proliferation of microprocessors EVERYWHERE:

Increased equipment sensitivitysensitivityExpense of lost production - downproduction down timeLitigation andLitigation and insurance expense

Surge Protection

How surges enter facilities - incomingHow surges enter facilities incoming

Surge Protection

HHow surges enter facilities –

Earth Potential RiseRise

Surge Protection

Typical Surge Waveforms

SPD Definition

Surge Protective Device (SPD)Surge Protective Device (SPD)

Device that is intended to:

- limit transient overvoltages, and

- divert surge currents.

It contains at least one non-linear component.[definition 3.1 of IEC 61643-1]

Also: Transient Voltage Surge SuppressorS rge ArresterSurge ArresterSurge Protector

SPD Components – “Voltage Limiting” and “Voltage Switching”and “Voltage Switching”

SPD Components – voltage limiting

VaristorsVaristors

MostMost commonly Metal OxideMetal Oxide Varistors(MOVs)(MOVs)

SPD Components – voltage limiting

Solid StateSolid State Devices

Zener diodes, f l d tformuled to handle surge energyenergy “Transorbs”

Also, thyristors

SPD Components – voltage switching

GasGas Discharge Tubes (GDTs)

Inert gas between two

l t delectrodes

SPD Components – voltage switching

Spark GapsSpark Gaps

An air gapAn air gap formed between twobetween two closely spaced electrodeselectrodes

SPD Components – characteristics

(Can combine for the best of each)

SPD Components – characteristics

SPD Components – characteristics

SPD Responses

RESPONSE OFVOLTAGE LIMITING

TYPE OF SPD

SPD Responses

RESPONSE OFVOLTAGE SWITCHING

TYPE OF SPD

SPD Responses

RESPONSE OFONE-PORT COMBINATION

TYPE OF SPD

SPD Responses

RESPONSE OFTWO-PORT COMBINATION

TYPE OF SPD

SPD Responses

RESPONSE OF TWO-PORT VOLTAGE LIMITINGTYPE OF SPD WITH FILTERING

SPD Configuration – one port

Common input/output Separate input/output

SHUNT (ONE-PORT) PROTECTORS

SPD Configuration – two port

Surge Filter Signal Line SPD

SERIES (TWO-PORT) PROTECTORS

SPD Configuration - MSPD

MULTI-SERVICE PROTECTION DEVICEMULTI-SERVICE PROTECTION DEVICE

Protection modes

Common Mode(Longitudinal)

Differential Mode(Transverse)(Longitudinal) (Transverse)

CCAC Power Line AC Power Line PROTECTIONPROTECTIONPROTECTIONPROTECTION

5. Protect incoming AC power feeders

SURGE AND TRANSIENT PROTECTIONPROTECTION

A Surge Protector needs:

• A good Surge Rating (8/20us).• Handles Lightning surges• Provides a good lifetime• Provides a good lifetime

• A low Let-through voltage.• Protects the equipment• Protects the equipment.

• To be able to handle Temporary Over Voltage (TOV)Over Voltage (TOV)

• So it behave safely during high AC over voltages

Surge Current Ratingsg g

Wh t S C t R ti d IWhat Surge Current Rating do I need?

Let’s look at what the standardsLet’s look at what the standards tell us

Surge Current Ratingsg g

Surge Current Ratingsg g

Attenuated Surge Currents (Incoming surges)

IEC Test Class II (8/20us)

Partial Direct Lightning Currents (Outgoing surges)

IEC Test Class I (10/350us) IEC Test Class II (8/20us)

IEEE Scenario I

IEC Test Class I (10/350us)

IEEE Scenario II

Surge Current Ratings

Standard Service Entrance Sub Panel Socket Outlet

g g

Flashes to the structure/LPS(outgoing surges)

Surges due to flashes to services(incoming surges)

IEEEC62.41.2 - 2002

Cat C Cat B Cat A

Scenario II Scenario IScenario II Scenario I10kA, 10/350us100kA, 8/20us

10kA, 8/20us L-N3kA, 8/20us N-G (non-MEN) 3kA, 8/20us 500A, 8/20us

IEC62305-1 (2006) 25kA, 10/350us 10kA, 10/350us (direct flash)

5kA 8/20us (nearby flash)200A, 8/20us

62305-4 (2006) 5kA, 8/20us (nearby flash)

AS/NZS1768 - 2007

Cat C3 Cat C1 Cat B Cat A

50kA, 8/20us 10kA, 8/20us 3kA, 8/20us 500A, 8/20us

RecommendedSPD Rating

100kA, 8/20us 40kA, 8/20us 10-40kA, 8/20us 3-10kA, 8/20us

There is still not complete agreement or consensus on this matter:There is still not complete agreement or consensus on this matter:• IEC values are given in “Informative” (not Normative) Annex to standard• IEEE standard has Annex expressing misgivings about the Scenario II values

Surge Current Ratingsg g

RECOMMENDED SURGE RATINGS

LOCATION Exposed locations, orbuilding has LPS

Less exposed,built-up area

Feeders and short branch circuits

Outlets and longbranch circuits

FOR A.C. POWER SYSTEM SPDs PER PHASE

RecommendedSPD Rating 100kA, 8/20us 40kA, 8/20us 10-40kA, 8/20us 3-10kA, 8/20us

g p

MOV Surge Lifetimeg8/20μs

MOV Surge Lifetimeg

1000010000

(kA

) A 10:1 reduction in surge current, gives 1000 times more life

1000

urre

nt ( 1000 times more life

100

urge

Cu

A halving of surge

101 10 100 1000 10000 100000 1000000

S current, gives 8 times more life

1 10 100 1000 10000 100000 1000000

Number of impulses (8/20us)

MOV Surge Lifetimeg

Can PARALLEL MOV’s t i ff tito increase effective surge capacity and increase lifetime.

200kA MOV material

MOV Surge Lifetimeg

Equipment i tibilitresistibility

ITI (CBEMA) Curve

Information Technology Industry Council

ITI (CBEMA) Curve

Industry Council (ITI,formerly known as the Computer & Business Equipment Manufacturers A i i )Association)

Strictly – only applies to 120V systems, but often y ,taken to apply to 220V or 240V systems.

MOV CLAMPING (Let-through)( g )

1500

MOV CLAMPING (Let-through)( g )

Let-through voltage depends on the surge applied, and other factors such as g pp ,lead length.For a 220-240V system a let-throughFor a 220 240V system, a let through voltage of approximately 700V to 850Vis good (at 3kA 8/20us)is good (at 3kA, 8/20us).

8/20μs BUT – not so low that TOV becomes a problem!becomes a problem!

What is TOV?

TEMPORARY OVER-VOLTAGE

Source: Electronic Buyers News

TEMPORARY OVER-VOLTAGE

SPD in Conduction TOV Condition

Nominal AC MainsOperating Voltage

Nominal ClampingVoltage on 50/60 Hz

Operating Voltage

TEMPORARY OVER-VOLTAGE

Wh MOV i bj d O l i b i dWhen a MOV is subjected to Over-voltage, it begins to conduct current.

This causes energy to be dissipated in the MOV and eventually causes it

t f il t i ll t Sh t Ci itto fail, typically to a Short Circuit.

This causes a large amount of Current to flow into the failing product, only

li it d b th P S l ’ bilit t d li t (P tilimited by the Power Supply’s ability to deliver current (Prospective

Short Circuit Current).

Th d t th ft “bl ” i it i i d t ti lThe product then often “blows” open circuit causing arcing and potential

fire hazard.

A d i h ll i t id thi l i fi h d!A design challenge is to avoid this explosive fire hazard!

UL 1449 over-voltage tests

A 7 hour safety test with full phase voltage.That is, 240V products used on 240/415V systems are tested with 415V415VThe product can fail, but must fail safely (not catch fire, or cause a fire)

Passing UL Over Voltage test

High voltage MOV'sIncreased voltage let-through to equipment!Increased voltage let through to equipment!

Thermal fusesSafe, but permanently disconnects protection!

TD technologyMeets UL requirements and continues to provide transient protection after an overprovide transient protection after an over-voltage event

TRANSIENT DISCRIMINATINGTechnologyTechnology

TRANSIENT DISCRIMINATINGTechnologyTechnology

Low SPDvoltage clamping

TD technology.clamping

Transient Discriminating MOVTECMOVTEC

TDS-MPM

TDS-MOVTEC

Thermal Fusing

Thi h h h f h f ili SPD di iThis approach uses the heat of the failing SPD to cause a disconnection to

occur. This is usually accomplished by allowing a soldered connection

to melt and spring opento melt and spring open.

Thermal Fusing

Overcurrent Fusing

This approach uses a more familiar fuse to disconnect the product. The fuse used pp p

here is a special design that:

1) Has high Current Interrupting Capacity (kAIC)

2) Will pass high surge currents, but

3) Will open quickly on AC follow-on currents!

Product Testing

Standard UL 1449 is widely regarded as the standard imposing the mostStandard UL 1449 is widely regarded as the standard imposing the most

stringent test requirements to ensure product safety.

It has three types of Abnormal Overvoltage tests, that involve applying the yp g pp y g

overvoltage, and limiting the following current to different values to

ensure correct operation over a wide range of conditions:

1) Low current: 5A to 10A (we use THERMAL FUSING)

2) Intermediate Current: 500A to 1000A (we use OVERCURRENT FUSING)

3) Maximum Current: Manufacturer decides how high to go. We have

chosen to go to the maximum – 200,000A (we use OVERCURRENT

FUSING).

AbnormalOver voltageOver-voltage

Abnormal Over voltage applied withAbnormal Over-voltage applied, with500A limited current(FUSES SHORTED OUT)

AbnormalOver voltage

Abnormal Over voltage applied with

Over-voltage

Abnormal Over-voltage applied, with500A limited current(FUSES active)

Abnormal Over-Voltagewith high SSCRwith high SSCR

Abnormal Over voltage applied withAbnormal Over-voltage applied, with200,000A prospective current(FUSES SHORTED OUT)

Abnormal Over-Voltagewith high SSCR

Abnormal Over voltage applied with

with high SSCR

Abnormal Over-voltage applied, with200,000A prospective current(FUSES active)

The three safetytechnologiestechnologies

Problem Solution

Temporary over-voltage

Problem Solution

Aged MOV

Excess surge current

IEC 61643-1 Table B.1TOV test valuesTOV test values

Application TOV test values UT (Volts)pp TOV test values UT (Volts)SPDs connected to For 5 s

(LV-system faults)For 200 ms

(HV-system faults)(LV system faults) (HV system faults)

TN, TT and IT-systems

C t d L PE 1 71 * U0 1200 + U0Connected L-PE 1.71 * U0 1200 + U0

Connected L-(PE) N 1.45 * U0

Connected N-PE 1200Connected L-L

SPD Testing – General

General Mechanical and Electrical

Environmental requirements

Terminals mechanical requirementsTerminals – mechanical requirements

Protection against direct contact

Mechanical strength

Heat and Fire resistance

Electrical isolation between circuits

Earth Leakage

Insulation resistance

IEC Parameters of an SPD

Uc – Maximum Continuous Operating VoltageUc Maximum Continuous Operating Voltage

Up – Voltage Protection Level

Iimp – Maximum Surge Current (10/350us)p

[Test class I]

Imax – Maximum Surge Current (8/20us)

[Test class I and II]

In – Nominal Surge Current (8/20us)

[T t l II][Test class II]

Uoc – Open circuit voltage of test impulse

[Test class III][Test class III]

IL – Rated Load Current

UL Parameters of an SPD

MCOV Maximum Continuous Operating VoltageMCOV – Maximum Continuous Operating Voltage

SVR Ratings – Suppressed Voltage Rating (let-

through voltage measured at 6kV 1.2/50us, 500A

8/20us)

Short Circuit Rating – Declared by manufacturer

and used for TOV and other tests

Rated line voltage

Rated CurrentRated Current

New UL1449 Edition 3T t R i tTest Requirements

UL will now test and label In rating (15 shot 8/20us rating)

VPLSVR replaced with VPL – a Cat B 6kV/3kA “Let-through” Voltage Test

Requirement for additional tests for product safety under abnormal over voltage tests (SSCR)

SPD Testing – series SPD’s

Tests for two-port SPDs and one-port SPDs with separate input/output terminals

Voltage Regulationg g

Rated Load Current

Load-side Short CircuitsLoad-side Short Circuits

Load-side surge withstand

bilitcapability

Overload Behaviour

SPD Status Indication

M h i lElectrical

Mechanical indication

indication (LED’s)

AudibleAudible

AlarmAlarm Contacts

Installation of SPD’s

SPD Installation –d f t timodes of protection

SPD Installation –d f t timodes of protection

SPD Installation –AC P S tAC Power Systems

Before applying SPD’s to AC Power Systems, we first

need to determine the type of power system,

commonly:

TN-CTN-C

TN-S

TN-C-S

TT

TN-C Power System

In this the neutral and protective earth conductor combine in a single conductor throughoutIn this, the neutral and protective earth conductor combine in a single conductor throughout the system. All exposed-conductive-parts are connected to the PEN conductor.

TN-S Power System

In this, a separate neutral and protective earth conductor are run throughout. The protective PE conductor can be the metallic sheath of the power distribution cable or a separate conductor Allconductor can be the metallic sheath of the power distribution cable or a separate conductor. All exposed-conductive-parts of the installation are connected to this PE conductor.

TN-C-S Power System

In this, a separate neutral and protective earth combine in a single PEN conductor. This system is also known as a Multiple Earthed Neutral (MEN) system and the protective conductor is referred toalso known as a Multiple Earthed Neutral (MEN) system and the protective conductor is referred to as the Combined Neutral Earth (CNE) conductor. The supply PEN conductor is earthed at a number of points throughout the network and generally as close to the consumer’s point-of-entry as possible. All exposed-conductive-parts are connected to the CNE conductor.

TT Power System

A system having one point of the source of energy earthed and the exposed-conductive-parts of the installation connected to independent earthed electrodesinstallation connected to independent earthed electrodes.

SPD Installation - Coordination

(Inductor or Building Cable)

P i SPD S d SPD

(Inductor or Building Cable)

Primary SPD Secondary SPD

Primary SPD Diverts CurrentSecondary SPD Limits VoltageSecondary SPD Limits Voltage

SPD Installation - Coordination

SPD Installation - Fusingg

SSPD

SPD Installation – RCDs (ELCBs)( )

S SSPD

SPD

SPD Installation – Wiringg

S SSPD

SPD

SPD Installation – Wiringg

SPD

SPD

SPDD D

SPD Installation – Wiringg

SPD Installation – Wiringg

SPD Installation – Wiringg

ApproximatelyApproximately 4 metres of

wiring length

Line routing and line shieldingg g

U t t d tUnprotected system

Line routing and line shieldingg g

Reducing the magnetic field inside an inner LPZ by its spatial shieldspatial shield

Line routing and line shieldingg g

Reducing the influence of the field on lines by line shieldingline shielding

Line routing and line shieldingg g

Reducing the induction loop area by suitable line routingline routing

DIN Rail mountedDIN Rail mountedSurge ProtectorsSurge Protectors

CRITEC Productsfor the IEC Systemfor the IEC System

50kA

100kA10/350us

50kA10/350us

CRITEC Productsfor the IEC Systemfor the IEC System

5kA

60kA8/20us

5kA10/350us

8/20us

10kA 100kA10kA10/350us

100kA8/20us

10kA

40kA8/20us

8/20us

CRITEC DIN Rail Mount TDS SeriesTDS Series

50kA100kA 8/20μs50kA

8/20μs8/20μs

Replaceable modules

TT system

50kA 8/20μs

Alarm contacts

Various voltages

Spark

Gap

N E

TNC system

50kA 8/20

N-E

50kA 8/20μs

CRITEC TDS-SCSurge CounterSurge Counter

The TDX Modular Product RangeProduct Range

TDX ModularCommon SpecificationsCommon Specifications

Incorporate the three safety technologies:technologies:

TD™ technologyThermal protectionOver-current protection

200kAIC ratingEMI/RFI filteringMetal NEMA 4 enclosure

CRITEC TDX100M and TDX200M SpecificationsTDX200M Specifications

Modular TD™

“Plug-able”Available in Wye or Delta Three Phase configurationsAll mode or TT models (TT for Asia)Alarm ContactsOptional surge counter

TDX100M100kA 8/20usper phase TDX200Mper phase TDX200M

200kA 8/20usper phase

CRITEC TDX200M Typical Panel InstallationTypical Panel Installation

The TDX Compact Product RangeProduct Range

TDX CompactCommon SpecificationsCommon Specifications

Compact TD™

Single or Three Phase WyeSingle or Three Phase Wye configurationsAll mode protectionpMetal NEMA 4 enclosure50 or 100kA 8/20 per Phase50 or 100kA 8/20 per Phase200kAIC rating

CRITEC TDX100M and TDX50C Typical Panel InstallationTypical Panel Installation

Surge Filtering

HOW TO CONTROL THE VOLTAGETO YOUR EQUIPMENTTO YOUR EQUIPMENT

Series Connected DeviceSeries Connected Device

Wavefront slowed

Energy diverted and filtered

Sized based on load current

Lower let-through voltage

Ideal for electronics,Ideal for electronics,

computing & communications

equipment - fine protectionequipment fine protection

Triggered Spark Gap Technology

Designed to overcome problemsassociated with “Long Tail Pulses”g

Enhanced Spark Gap Technology combined with TDS Technology provides the building blocksbuilding blocks for the future of effective surgethe future of effective surge protection

Internal Workings – Sectional Viewg

Typical Performance

TSG1130-2S – Cat B. 6kV/3kA Test Results

Curve 1 –“Let-through Voltage”(1.4kV)

Curve 2 –Curve 2 –“Input Surge Current”(3kA, 8/20us)( , )

TSG1130-2S – Cat C. 6kV/20kA Test ResultsTest Results

Curve 1 –

“Let-through Voltage”

Max. 1.9kVpeak

Curve 2 –

“Input Surge Current”

TSG-SRF363 – Cat C. 6kV/20kA Test Results

Curve 1 –

“Let-through Voltage”

Max 230Vpeak

Curve 2 –

“Input Surge Current”Input Surge Current

20kA

SURGE REDUCTION FILTERSURGE REDUCTION FILTER

SRF INSTALLEDINSTALLED

Modular DIN Rail SRF’s

Modular DIN Rail SRF’s

Load Segregation –use TSG-SRF on sensitive loads only

SPD Filteringg

Conventional RFI filters DO NOT function well as SPDfunction well as SPD filters, due to the frequencies involved

Telephone and Telephone and Data Line Data Line

PROTECTIONPROTECTIONPROTECTIONPROTECTION6. Protect low voltage data/telecommunication circuits.

Consequence of unprotected data circuits!data circuits!

Consequence of unprotected low voltage data circuits!low voltage data circuits!

Damage - Fire Alarm Systems

Damage - Lift Control Systems

Effects Of Transients On Electronic EquipmentOn Electronic Equipment

Case Study: US AirCase Study: US Air Force

Average of 6 boardsAverage of 6 boards per week are lost to lightning transients

Source: Texas Instruments

HYBRID DATA CIRCUIT PERFORMANCEPERFORMANCE

TLP CONFIGURATIONS

Single Stage CircuitSingle Stage CircuitSingle Stage CircuitSingle Stage CircuitCRITEC SLP10CRITEC SLP10--K1FK1F

CircuitCircuit PerformancePerformancePerformancePerformanceTypical response to 5kV, 125A Typical response to 5kV, 125A

10/700µs CCITT10/700µs CCITT--K17 pulseK17 pulse

TLP CONFIGURATIONS

Multi Stage CircuitMulti Stage CircuitMulti Stage Circuit Multi Stage Circuit CRITEC HSP10CRITEC HSP10--K230, HSP10K230, HSP10--K72K72

CircuitCircuit PerformancePerformancePerformancePerformanceTypical response to 5kV, 125A Typical response to 5kV, 125A

10/700µs CCITT10/700µs CCITT--K17 pulseK17 pulse

Telecoms Systems:Systems:

TELECOMMUNICATIONS PROTECTIONPROTECTION

DATA LINEPROTECTIONPROTECTION

UTB SeriesUniversal Transient Barrier

The UTB employs a hybrid, three stage clamping circuit, to ensure the best

ibl t ti t itipossible protection to sensitive electronic equipment while maintaining a minimum of line interference and insertion lossesinsertion losses

Imax (8/20us) = 20 kAImax (8/20us) 20 kA

UTB SeriesUniversal Transient Barrier

Resettable PTCs Series Coordinating provide overcurrent protection

gElements

Stage 1: Gas Tube with shorting bar -primary surge and mains incursion

Stage 2: Metal Oxide Varistors – intermediate protection

Stage 3: Silicon Avalanche Diodes – fine protectionmains incursion

protectionprotection protection

Clamping performanceof a UTB-5 transient barrierof a UTB 5 transient barrier

k k li d i l

Applied pulse of 6kV 1.2/50us, 3kA 8/20us, is clamped to <13V

ANSI C62.41 6kV 3kA applied impulse

Clamped to <13V

Universal Transient Barriers used in SCADA protectionused in SCADA protection

New UTB’s

New UTB’s

U i l T i B i 1 D P i (1 P i ) I 1 A I 20kAUniversal Transient Barrier, 1 x Data Protection (1 x Pair), IL 1.5A, Imax 20kA UTB5S UTB, Compact, 1pair, Un 5V, IL 1.5A, Imax 20kA UTB15S UTB, Compact, 1pair, Un 15V, IL 1.5A, Imax 20kA UTB30S UTB, Compact, 1pair, Un 30V, IL 1.5A, Imax 20kA UTB60S UTB, Compact, 1pair, Un 60V, IL 1.5A, Imax 20kA UTB110S UTB, Compact, 1pair, Un 110V, IL 1.5A, Imax 20kA

Employ a hybrid, three stageEmploy a hybrid, three stage clamping circuit to help ensure the best possible protection to sensitive electronic equipment while

i t i i i i f limaintaining a minimum of line interference and insertion losses.

Full UTB Circuit, includes PTC, 1.5A rating but slimmer (12mm)rating, but slimmer (12mm).

110V version omits PTC’s.

New UTB’s

U i l T i B i 2 D P i (2 P i ) I 800 A I 20kAUniversal Transient Barrier, 2 x Data Protection (2 x Pair), IL 800mA, Imax 20kA UTB5D UTB, Compact, 2pair, Un 5V, IL 800mA, Imax 20kA UTB15D UTB, Compact, 2pair, Un 15V, IL 800mA, Imax 20kA UTB30D UTB, Compact, 2pair, Un 30V, IL 800mA, Imax 20kA UTB60D UTB, Compact, 2pair, Un 60V, IL 800mA, Imax 20kA UTB110D UTB, Compact, 2pair, Un 110V, IL 800mA, Imax 20kA

Employ a hybrid, three stage clamping circuit to help ensure the best possible protection to sensitive electronic equipment while maintaining a minimum of line interference and insertion lossesand insertion losses.

Each circuit omits PTC’s, some series components, and has reduced current rating to 800mAto 800mA.

But each circuit effectively 6mm wide

No replaceable modules

New UTB’s

U i l T i B i 1 D P i 1 PSU P i I 20kA

Specifically designed for applications

Universal Transient Barrier, 1 x Data Protection, 1 x PSU Protection, Imax 20kA UTB30PS UTB, Dual, Un 30V, IL 800mA, 12/24VDC, IL 5A

Spec ca y des g ed o app ca o swhere compact protection is required for one signal pair and one power supply, common in powered transducer applicationstransducer applications.

Combines a UTB-30 type circuit, with 12/24V supply protection.

UTB-30 circuit – same as for “D”ouble UTB’s

Power supply protection, uses thermally protected MOVs, and handles 5A.

New UTB’s

Universal Transient Barrier, Potential Equaliser, Imax 20kA

Generally designed for a variety of

, q , UTBMP UTB, Compact, 2pair, MultiPurpose Equaliser, 5A

applications, including course protection, signal ground bonding or higher current applications.

Uses 2 x 230V GDT’s.

Multi Purpose applications:

• Through connectionsThrough connections

• Potential equalisers (shield/screen to earth)

B i t ti f 2 t• Basic protection for 2 ccts

• 5A per line rating

AS/NZS1768 – Examples for SPD’sCentral PLC and Remote Sensor

CENTRALCENTRAL FACILITY

LEGEND:MSB = Main Switch BoardMDF = Main Distribution FrameMEB = Main Earth BarBB = Bonding BarPLC = Programmable Logic Controller

SPD MODEM

OPERATOR CONSOLE

REMOTE SENSOR

SIGNAL LINE(S)

LOCAL SENSOR

MSB

MDF

SPDTELECOM

PLC = Programmable Logic Controller

SPDPLC

SPD MODEMSPD SPD

SIGNAL LINE(S)

MEBSPD

BB

MSBAC POWER

Multi-storey buildingWith PABXWith PABX onUpper Floor

PABX

SECOND FLOOR

EB

SPD

BB

DBIDF

SPD

SPDINTERNAL

EXTENSIONS

EXTERNAL EXTENSIONS

FIRST FLOOR

MDF

SPD

SPD

GROUND FLOOR

TELECOMS SERVICE

MEB

SPD

BB

MSBAC POWER

LEGEND:MSB = Main Switch BoardDB = Distribution BoardMDF = Main Distribution FrameIDF = Intermediate Distribution FrameMEB = Main Earth Bar; BB = Bonding BarPABX = Private Automatic Branch Exchange

A Domestic Computerand ADSL Modem

Fax

SPD

TELECOMS SERVICE

MPSD

Voice

ADSL

Telecoms Socket

SPDSBAC POWER

Modem Monitor PC Printer ScannerPower Socket

MPSD POWER BOARD

LEGENDLEGEND:SB = Switch BoardMPSD = Multi-service Surge Protection DeviceADSL = Asynchronous Digital Subscriber Line

Rooftop CellularROOFTOP CABIN

SPD

Base Station SPD DBEQPT

TO BLDG LPSBB

AC POWER

MEB

SPDMSB

LEGEND:MSB = Main Switch Board; DB = Distribution BoardMEB = Main Earth Bar; BB = Bonding Bar

ERICO SURGE PRODUCTS

Let’s look at some surge products:

• Primary (Point of Entry) – Shunty ( y)

• Primary (Point of Entry) – Series

• Secondary (Sub-panel) Shunt• Secondary (Sub-panel) – Shunt

• Secondary (Sub-panel) – Series

T l i ti P t t• Telecommunications Protectors

• Data/Signaling Protectors

SURGE PRODUCTS(AC POWER)(AC POWER)

Primary (Point of Entry) - Shunt (1)

TDS-MPM

TDX

TDS-MOVTEC

SURGE PRODUCTS(AC POWER)(AC POWER)

Primary (Point of Entry) - Shunt (2)

TSG DSD

TDS350

SURGE PRODUCTS(AC POWER)(AC POWER)

P i (P i t f E t ) S iPrimary (Point of Entry) - Series

Modular SRF

TSG-SRF

SURGE PRODUCTS(AC POWER)(AC POWER)

S d (S b l) Sh tSecondary (Sub-panel) - Shunt

DSDTDS

DSD

SURGE PRODUCTS(AC POWER)(AC POWER)

S d (S b l) S iSecondary (Sub-panel) - Series

TDF and DSF

PLF

SURGE PRODUCTS(Telecoms, Data)(Telecoms, Data)

Telecommunications Protectors

SLP and HSP DLT (for SLP SLP and HSP and HSP) UTB-S

SURGE PRODUCTS(Telecoms, Data)(Telecoms, Data)

CSP DEP

CCTV LCP

UTBLAN

ERICOSurge LaboratorySurge Laboratory

160kA 8/20160kA 8/20usor

15kA 10/350us

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