Protective relay testing equipment

Protective relay testig equipmet

Simpler. Our aim is to make simpler the complex task of protective relay testig. Our robust, reliable solutios ad our advaced itegrated software have bee desiged to make the art of testig relay protectio schemes simpler ad more ituitive. By simplifyig testig we speed up the process, reducig costs by freeig up skilled ma hours that become available for other tasks. Megger Relay Testig equipmet gives you the tools you eed to POWER ON. 2 Relay Protectio Catalog www.megger.com

TABLE OF CONTENTS Protective Relay Testig Equipmet SMRT Series Automated Relay Test Sets SMRT Selectio Guide Expad Your Testig SMRT Accessories P4 P7 P8 P9 RTMS Relay Test ad Maagemet Software P10 SVERKER Series Maual Relay Test Sets SVERKER 900 SVERKER 780 / 750 SVERKER Software SVERKER 650 P12 P14 P16 P17 P18 MRCT Relay ad Curret Trasformer Tester P19 Supportig Products P20 Quality You Ca Deped O P22 www.megger.com 3

SMRT Series Relay Test Products Megger s SMRT Series of relay test sets has bee egieered to offer a full rage of testig solutios built aroud flexibility ad customizatio. These test sets are ideally suited for testig today s complex micro-processor relays as well as legacy electro-mechaical relays. The versatility of the SMRT Series is ideal for performig commissioig ad periodic maiteace testig to help keep the power o. Desiged for accuracy, reliability ad power, the SMRT Series delivers a level of assurace umatched i the relay testig idustry. 4 Relay Protectio Catalog www.megger.com

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SMRT Series Automated sigle phase, multi-phase ad relay commissioig test sets Whether you are testig sigle-phase or more complex 3-phase relays, the SMRT Series provides comprehesive testig solutios to meet your eeds. Our SMRT Series has the smart combiatio of high compliace voltage ad high curret to test all electromechaical, solid-state ad microprocessor-based overcurret relays, icludig voltage cotrolled, voltage restrait ad directioal overcurret. These features, combied with the ability to daisychai multiple SMRT uits, provide game-chagig flexibility ad testig optios to esure your testig eeds are met ad exceeded. Features High output curret High resolutio ad accuracy through metered outputs Covertible voltage chaels for ehaced testig optios Steady-state, dyamic ad trasiet testig capabilities, programmable waveforms with harmoics ad DFR playback Digital biary iput ad output for testig reclosig relays Boolea logic programmable for complex power system simulatios Audible ad visual error idicatios Dyamic, trasiet ad GPS satellite sychroized ed-to-ed testig capability with built-i IRIG-B IEC 61850 testig capability Small, rugged, ad portable SMRT46 SMRT46D Select from uits with itegrated RTMS (Relay Test ad Maagemet System) for stadaloe operatio usig a high resolutio touch scree, or uits without a itegrated touchscree that ca be cotrolled via a exteral PC. Daisy chai multiple SMRT1 uits to test more complex relay schemes ad expad your testig capabilities. 6 Relay Protectio Catalog www.megger.com

SMRT Selectio Guide SMRT1 SMRT33N SMRT43/43D SMRT46/46D SMRT410/410D Istataeous Curret per chael 60 A @ 300 VA RMS 45 A @ 300 VA RMS 45 A @ 300 VA RMS 60 A @ 300 VA RMS 60 A @ 300 VA RMS Outputs Cotrol Cotiuous Curret per chael Max Voltage per chael 30 A @ 200 VA RMS 30 A @ 200 VA RMS 30 A @ 200 VA RMS 30 A @ 200 VA RMS 30 A @ 200 VA RMS 300 V @ 150 VA RMS 300 V @ 150 VA RMS 3 X 300 V @ 150 VA RMS 1 X 150 V @ 100 VA RMS 3 X 300 V @ 150 VA RMS 1 X 150 V @ 100 VA RMS 4 X 300 V @ 150 VA RMS Number of Curret chaels 1/2* 3 3 3/6* 6/10* Number of Voltage chaels 1 3 4 4 4 Oboard Touch Scree display D model oly D model oly D model oly STVI optio PC Software RTMS/ PowerDB RTMS/ PowerDB RTMS/ PowerDB RTMS/ PowerDB RTMS/ PowerDB Commuicatios Bluetooth (Optioal) USB Etheret Trasducer (optioal) Battery Simulator (optioal) ** ** ** Weight 8.9 lbs (4 kg) 25.4 lbs (11.4 kg) Rack moutable 27.9 lbs (12.55 kg) D Model 29.35 lbs (13.2 kg) 27.9 lbs (12.55 kg) D Model 29.35 lbs (13.2 kg) 39.5 lbs (17.76 kg) D Model 42.65 lbs (19.2 kg) IEC61850 (Optioal) */X Represets the umber of chaels whe covertible voltage chaels are i curret mode. ** D Model Battery Simulator is a stadard feature. SMRT410/410D have a dedicated battery simulator, all other uits share the battery simulator ad V4. www.megger.com 7

Expad Your Testig Daisy-chaiig SMRT uits The SMRT Family of relay testig products is the oly solutio o the market that allows multiple test sets to be itercoected, cotrolled ad viewed as a sigle etity to icrease testig capabilities whe you eed it. The SMRT test sets ca be coected to oe aother usig stadard off-the-shelf Etheret cables. The coected uits are the sychroized ad cotrolled as a sigle test system usig RTMS, Megger s Relay Test ad Maagemet Software. This allows you to test eve the most complicated protectio schemes that require more tha 6 curret chaels, avoidig the eed to sectioalize testig ito differet zoes. This reduces your testig time from days to hours. or 1 2 3 4 5 26 7 28 9 10 11 12 2 13 14 2 15 16 17 18 2 31 32 25 26 2 27 28 29 30 2 19 20 2 21 22 23 24 2 The SMRT test sets show are coected via stadard RJ45 Etheret cables ad cotrolled from a sigle STVI iterface or PC. This example presets a 32 chael testig eviromet. 8 Relay Protectio Catalog www.megger.com

Popular SMRT Accessories The Smart Touch View Iterface (STVI) is a substatio hardeed cotroller for the SMRT series relay test sets, custom built to be adapted for field use. As a dedicated uit, it offers true plug ad play capability with test sets, elimiatig the eed to deal with costat Widows updates, viruses, commuicatio issues due to firewalls or ati-virus software, ad other aoyaces of usig a laptop or PC. Its ati-glare LCD scree is easily readable i direct sulight ad the resistive touchscree allows operatio eve whe wearig protective gloves. The STVI cotroller is both the most comprehesive relay test set cotroller o the market ad the easiest to use. Soft Carryig Case For SMRT1 ad STVI Smart Touch View Iterface Megger Trasit Case Relay Lead Coector www.megger.com 9

, RTMS Relay test ad maagemet software Megger s Relay Test ad Maagemet Software (RTMS) combies our easy to use Smart Touch View Iterface to give you icreased testig abilities that are easier tha ever to perform. RTMS is the go-to software platform for all relay testig requiremets ad is compatible across the etire Megger SMRT Family. This powerful software rus o SMRT uits with built i displays, the STVI had-held cotroller, or o your PC. RTMS Distictive Features User-friedly start-up maual test scree Geerate harmoic waveforms i real time Automatic cofiguratio for multi-phase tests Automatic rampig modes Automatic timig tests o overcurret, voltage ad frequecy relays Sequecer (dyamic) testig capability Click-o-fault impedace relay test scree Trasformer differetial testig capability Sychroizer relay characteristic test Frequecy relay test, icludig ROCOF df/dt relays Real-time split-scree display Execute AVTS files, fault calculator ad COMTRADE playback Maual Power Swig test capability 10 Relay Protectio Catalog www.megger.com

RTMS Stadard ad Ehaced RTMS comes i two versios Stadard ad Ehaced. The Stadard versio is icluded with every SMRT uit at o cost. It icludes all the test features ad capabilities foud previously i our STVI software, plus a overcurret relay test feature that supports directioal overcurret relay testig. The Ehaced versio of the software icludes may of the test modules foud previously i our AVTS Relay Library, ad features a sychroizer test ad frequecy test (icludes ROCOF). The Ehaced versio is a hardware eabled optio for SMRT uits, similar to the IEC 61850 feature. FEATURE STANDARD ENHANCED Maual Test Scree - Perform dyamic timig tests o virtually ay relay Icludes a fault calculator to geerate complex waveforms, spot test impedace relays, calculate positive, egative, ad zero sequece values. Maually cotrol up to 30 currets. Ramp Cotrol - Perform automatic cotiuous ramp, pulse ramp, or pulse ramp biary search Sequecer Test Scree - Ru real time sequece of vectors test scree Up to 15 vector states may be created to perform reclosig tests. The sequece ca be sychroized to a satellite usig IRIG-B iput for dyamic ed-to-ed tests. Timig Test - Automatic timig of: Overcurret, Voltage ad Frequecy Relays usig maufacturer s time curves Icludes time curves ad time curve algorithms for hudreds of relays. Overcurret Test icludes Pickup ad Timig of Phase, Groud, ad Neutral elemets, Phase, Groud ad Neutral Istataeous elemets, ad Directioal test associated with Phase, Groud ad Neutral elemets. Icludes test for DC Target ad Seal-i elemets. Differetial Scree - Automated differetial testig for Trasformers, Geerators ad Motors Test three phase Trasformer Differetial relays. All bias equatios are supported. Four slope characteristics are provided; Lie Segmets (e.g. G.E. SR 745), Slope Through X Axis (e.g. Siemes 7UT613), Slope Through Origi (e.g. SEL 387 ad 587) ad Slope From Base Poit (e.g. ABB RET670 ad Areva/Scheider P63x). Harmoic block ad harmoic shot tests are also available. Click-o-Fault Scree - Perform automated testig o distace relays Automatic Testig of Distace Elemets. Icludes geeric MHO, Half MHO, Quad. Software draws operatig characteristic(s) of the relay defied by user settigs. Relay Test Library icludes umerous impedace relay test templates. Perform tests usig Costat Curret, Costat Voltage, or Costat Source Impedace. Import RIO Files or import settigs from XRIO files, SEL settigs files ad GE settigs files. Fault Calculator Icludes easy to use test features such as overcurret ad voltage tests which provide harmoic output currets ad voltages. Icludes impedace mode butto for fast testig of impedaace relays, ad symmetrical mode for testig positive, egative, ad zero sequece. Recetly added power swig mode to perform power swig simulatios o impedace relays. Sychroizer Scree - Perform automated dv/df testig o sychroizer relays Provides automatic tests of sychroizig ad syc-check type relays. User ca simultaeously observe the sychro scope as test voltage rotates ad the dyamic test poit closig i o the relay close characteristic. Frequecy Scree - Perform automated test of frequecy relays Provides automatic pickup ad timig tests of Uder/Over Frequecy, ad df/dt ROCOF type relays. AVTS Scree - Ru the etire library of AVTS modules Megger has developed hudreds of relay specific test modules. Oe-Touch Tests will ope the commuicatio lik betwee RTMS ad the relay uder test, automatically dowload relay settigs, ad perform a sequece of tests. Test modules, which are Oe-Touch capable, save time, moey, ad remove the possibility of huma error whe readig ad eterig hudreds of relay settigs. Tests are coducted to dowloaded settigs. www.megger.com 11

SVERKER Series Relay ad Substatio Toolboxes Megger s SVERKER Series offer sigle ad three-phase test solutios combied with traditioal substatio testig applicatios. This combiatio makes them a egieer s toolbox built for testig efficiecy. Tests iclude plottig excitatio curves, curret ad voltage trasformer ratio tests, burde measuremet for protective relay test equipmet, impedace measuremet, efficiecy tests, ad polarity (directio) tests. Their desigs icorporate beefits gleaed from years of experiece i relay testig i the field, ad have a well-eared reputatio for reliability ad coveiece. SVERKER Series uits have sold more tha 22,000 uits globally, makig it the most sold relay tester i the world. Built to simplify your relay ad substatio testig, the SVERKER series simplify your testig so you ca power o. 12 Relay Protectio Catalog www.megger.com

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SVERKER 900 Maual relay ad substatio test system KEY FEATURES SVERKER 900 Curret Geerators 3 X 35 A @ 250 VA (DC or AC) Compliace voltage 50 V Sigle phase mode (Curret geerators i parallel) Sigle phase mode (Curret geerators i series) Voltage Geerators Sigle phase mode/voltage geerators i parallel Sigle phase mode/voltage geerators i series Frequecy Rage Timig Rage 0-105 A @ 300 VA 18 A, 625 VA (Compliace voltage 140 V) 4 X 300 V @ 125 VA (DC or AC) 300 V, 375 VA 900 V, 450 VA 10-600 Hz 1 ms - 35 mi. Time measuremet biary iputs 4 + 2 The SVERKER 900 is our top level maual relay test set. It supports three-phase testig, ad is desiged for users that do ot require the full features of our more advaced, automatic three-phase systems. Its 3 curret ad 4 voltage sources ca be coected i parallel or series to achieve up to 105 A AC or 900 V AC. This is sufficiet for may primary ijectio applicatios i distributio, geeratio ad idustrial eviromets. This multipurpose uit is perfect for muicipal utilities or electrical testig service providers with field crews who perform both relay ad substatio testig. The rugged hardware is desiged for field use over a wide temperature rage, with itelliget, itegrated software to perform rapid testig. Battery simulator, DC or AC supply output voltage Aalog iputs - curret (ameter) Aalog iputs - voltage (voltmeter) Mais Local software, stad aloe Kob, dial Power measuremet Weight Dimesios 300 V, 125 W or 125 VA 0 A - 10 A 0 V - 900 V 100-240 VAC 14.9 kg / 32.8 lbs. 350 mm X 270 mm X 220 mm / 13.8 i. X 10.6 i. X 8.7 i. Versatile toolbox for substatio 3-phase testig Three currets ad four voltages Stad-aloe fuctioality Rugged ad reliable for field use Geeratio of 900 V ad 105 A i sigle phase mode Secodary ad primary testig 14 Relay Protectio Catalog www.megger.com

SVERKER 900 Model Fuctioality The SVERKER900 comes i three model variatios: Basic, Stadard ad Expert. Each model offers various test istrumets to be used depedig o the test beig performed. INSTRUMENTS BASIC STANDARD EXPERT Mai istrumet Geeral: set - iject - measure Timig test Fidig the pick up ad drop off values CT magetizatio istrumet Test to determie the kee poit voltage of the curret trasformer Prefault - fault istrumet Timig test - to be used maily to test relays that require a simulatio of a prefault state before the fault simulatio Rampig istrumet Automatically determie the pick up threshold Time testig, e.g. whe testig df/dt relays Sequece istrumet Simulatio of sequeces, e.g. auto recloser, motor starts, re-strikig earth fault Impedace istrumet The impedace scree allows you to test relays directly from the impedace plae, where the coversio from the impedace ito voltages ad currets is automatically doe by the SVERKER 900. Used maily for testig distace protectio. Prefault ad fault test Impedace rampig www.megger.com 15

SVERKER 780 ad SVERKER750 Premier maual sigle-phase relay ad substatio toolbox The SVERKER 750 ad SVERKER 780 are maual, sigle-phase relay test sets desiged to be used i high voltage substatio ad idustrial eviromets. Testig ca be performed usig the oboard cotrols, or be maaged usig a PC ruig the optioal SVERKER Wi. Both models facilitate coveiet relay testig with a easy to read display that shows time, voltage, curret, Z, R, X, S, P, Q, phase agle ad cos phi. Directioal relays ad autoreclosers are easily tested. KEY FEATURES SVERKER 780 SVERKER 750 Curret Outputs AC 30 A cot., 250 A for 1 sec. 30 A cot., 250 A for 1 sec. Mai Voltage Outputs AC/DC 0-250 V AC, 0-300 V DC 0-250 V AC, 0-300 V DC AUX Voltage Output Timig Rage Rage: 5-220 V AC Frequecy Geerator Frequecy Rage: 15-550 Hz Phase Agle: 0-360 deg. Secods or cycles 0.000-999.9s 0-120 V AC Secods or cycles 0.000-999.9s Biary Iputs 2 (start ad stop) 2 (start ad stop) Biary Outputs 1 output Max. curret - 1 A Max. voltage - 250 V AC / 120 V DC 1 output Max. curret - 1 A Max. voltage - 250 V AC / 120 V DC DC Supply Output Voltage. 20-220 V DC 20-220 V DC Iteral Ammeter (high curret) 0-250 A AC 0-250 A AC Exteral Ammeter 0-6 A AC / DC 0-6A AC / DC Exteral V-Meter 0-600 V AC / DC 0-600 V AC / DC Measuremets Z (Ω ad ), Z (Ω), R ad X (Ω ad Ω), P (W), S (VA), Q (VAR) Z (Ω ad ), Z (Ω), R ad X (Ω ad Ω), P (W), S (VA), Q (VAR) Reclosig test Local software Optioal PC software USB Comm. port Resistor Set Mais Voltage 115 / 230 V AC, 50 / 60 Hz 115 / 230 V AC, 50 / 60 Hz Weight 39.9 lbs. / 18.1 kg. (without accessories) 17.3 kg / 38.1 lbs. (without accessories) Dimesios 350 mm X 270 mm X 220 mm / 13.8 i. X 10.6 i. X 8.7 i. 350 mm X 270 mm X 220 mm / 13.8 i. X 10.6 i. X 8.7 i. 16 Relay Protectio Catalog www.megger.com

SVERKER SOFTWARE SVERKER Wi for SVERKER 780 ad SVERKER 750 SVERKER Wi makes fieldwork easier while providig eat ad easily readable reports for your record keepig. The SVERKER Wi software eables you to cotrol the SVERKER from a PC, ad gives you access to customized reports, referece graphs, ad curret curve templates for may differet relay types. Streamlie test reportig ad documetatio by geeratig customizable, prit-ready test reports Test reports are easy to read ad share with full tables ad graphs Test results are i a ope format that ca be easily exported to thirdparty software like Microsoft Word or Excel Log lists are geerated durig testig ad stored as a data file, with the ability to add commets to each test poit Access to coectio istructios ad test istructios for streamlied testig Customized settigs are saved ad stored, ad ca be retrieved whe testig similar devices www.megger.com 17

SVERKER 650 Basic maual sigle-phase relay ad substatio toolbox KEY FEATURES SVERKER 650 Curret Outputs AC Mai Voltage Outputs AC/DC AUX Voltage Output Timig Rage Biary Iputs Iteral I Meter Mais voltage Output for Exteral A Meter Resistor Set Weight Dimesios 0-100 A 0-250 V AC, 0-350 V DC DC Rage: 20-220 V DC AC Fixed: 110 V AC Secods or cycles 0.000-999.9 s 2 (start ad stop) Aalog 0-100 A 115 V or 230 V 16 kg / 35.3 lbs. 280 mm X 178 mm X 220 mm / 11 i. X 7 i. X 8.7 i. The SVERKER 650 is a simple sigle-phase relay test set, desiged to be used i high voltage substatio ad idustrial eviromets. The SVERKER 650 offers maual secodary testig of almost all types of sigle-phase protective relays. It ca be used with the optioal ACA120, a variable AC voltage source, to test directioal overcurret relays with higher settigs. Rugged desig for field use 0 to 100 Amp output curret Suitable for testig may differet types of relays such as power, voltage ad curret Easy to operate 18 Relay Protectio Catalog www.megger.com

MRCT Megger relay ad curret trasformer tester The Megger MRCT is a light weight, robust, portable uit used to perform demagetizatio, ratio, saturatio, widig resistace, polarity, phase deviatio, ad isulatio tests o curret trasformers. The MRCT automatically calculates ratio errors, saturatio curves, ad kee poits. The MRCT provides a microprocessor-cotrolled variable voltage ad curret output ad precisio istrumetatio for automatically testig sigle ad multi ratio CTs, reducig testig time ad icreasig productivity. The MRCT will directly coect to multi ratio CT s ad perform all tests saturatio, ratio ad polarity, widig resistace ad isulatio o all taps with the push of a butto ad without chagig leads. Idustry leadig test duratio usig pateted simultaeous multi-tap measuremets reduces testig time by 20% o multi-tap CT s Icreased measuremet accuracy to support meterig class CT testig Smallest ad lightest 2 kv secodary voltage ijectio uit o the market Itegrated sigle phase relay test system Geeral purpose substatio secodary circuit testig with 300 V ad 60 A geerators Grouped testig: demagetizatio, kee poits, ratios, saturatio curves, ad more Measure all ratios ad saturatio curves o multi-tap CTs with oe lead coectio Built-i isulatio resistace testig Relay optio adds all features of the SMRT Series to the MRCT New Optioal Features VT testig CVT testig up to 256 kv New DC algorithm for testig CT keepoits up to 30 kv www.megger.com 19

SUPPORTING PRODUCTS PMM-1 The PMM-1 is a multifuctio istrumet for measurig ad loggig power quatities commoly foud i three-phase electrical systems. It has a built-i timer for measurig iductio uit pickup ad other relay timig tests. It ca be used to coduct load ad voltage surveys by automatically measurig ad storig up to 286 three-phase datasets at user-defied time itervals. MGTR-II The MGTR-II is a timig referece for the SMRT ad FREJA series relay test sets for sychroized ed-to-ed testig of lie protectio schemes. It has a 12-chael Global Positioig System (GPS) receiver to simultaeously track all available GPS satellites ad derive highly accurate timig iformatio from the satellites cesium atomic clocks. The MGTR-II ca geerate a precise Programmed Output Pulse (POP) with 100 s resolutio, allowig it to sychroize multiple test systems, miles apart, to withi 1 µs of Uiversal Time Coordiated (UTC). The Itelliget Holdover feature provides ear rubidium stadard accuracy i the absece or loss of GPS sigals so you ca test eve i urba cayo eviromets or govermet ad military facilities where GPS sigals may be temporarily blocked. PAM410 The PAM410 is a digital phase agle meter desiged to perform phase agle measuremets i high voltage substatios ad idustrial eviromets (CAT III 500 V safety ratig). Its iputs ca be switched betwee curret ad voltage, allowig it to measure the phase agle relatioship betwee ay combiatios of two sigals. PAM420 The PAM420 is a digital multifuctio meter desiged for use i high voltage substatios ad idustrial eviromets (CAT III 500 V safety ratig). It ca measure phase agle, voltage, curret, frequecy ad timig. Its iputs ca be switched betwee curret ad voltage, allowig it to measure the phase agle relatioship betwee ay combiatios of two sigals. 20 Relay Protectio Catalog www.megger.com

TM200 The TM200 is a digital timer desiged for use i medium voltage substatio ad idustrial eviromets. Its 1 ms resolutio makes it suitable for a broad rage of timig ad triggerig applicatios from circuit breaker testig to relay testig. SST-9203 The SST-9203 is a digital timer desiged for use i high oise utility eviromets such as extra high voltage substatios ad switchyards. Its shieldig ad oise-suppressio circuitry esures reliable readigs whe measurig the operatig time of switchig devices such as relays, circuit breakers or cotactors. Usig a crystal-cotrolled oscillator, it ca achieve 100 µs accuracy, idepedet of power lie frequecy. NTS-300A The NTS-300A is self-cotaied test set specifically desiged for field testig of secodary etwork protectors. Network protectors are typically istalled i udergroud vaults cotaied withi a submersible eclosure ad the NTS-300A s two-piece desig makes it easy to maeuver ad operate i tight spaces. The NTS-300A is able to perform all tests as specified i the IEEE C57.12.44-2014 stadard. ERTS The Electroic Recloser Test Simulator adds the ability to easily test electroically cotrolled reclosers to Megger s relay test sets. It ca simulate three-pole or sigle-pole trip ad reclose, ad ca test both the electroic cotroller ad the recloser o the pole simultaeously. The icluded 14, 19 ad 32 pi cable adapters allow it to directly iterface with the most widely used reclosers o the market. AFS (Arc Flash Simulator) The Arc Flash Simulator iterfaces with Megger s relay test sets to test arc flash protectio systems. It provides a high itesity white light to simulate a arc flash without the eed for a direct coectio to the arc flash sesor. The flexible arm ad magetic base allows for easy moutig ad positioig o switchgear ad other metal surfaces. www.megger.com 21

Quality You Ca Deped O. To keep the power o, you eed electrical testig equipmet that you ca trust will fuctio properly ad deliver the proper results. Each Megger testig uit is put through a rigorous developmet ad testig process to esure that whe you eed it most, it will deliver the fuctioality you eed. Megger uses iteratioally recogized quality desig practices for every sigle compoet that goes ito our relay testig uits. All uits are maufactured ihouse to our exactig quality stadards. Megger is ISO9001 certified, with strict supply chai stadards that iclude aual o-site ispectios ad audits of our key suppliers. Our uits are desiged to keep up with you i the field ad ca withstad mechaical stress i accordace with iteratioal stadards for vibratio, trasit drop, free fall ad topple shocks. Each completed uit udergoes a full systems test, with every iput ad output tested to their full operatig rage ad limits. The uit is the stress tested i a thermal chamber where the temperature is cycled to thermal extremes. Iteral sesors allow autoomous temperature moitorig ad cotrol, esurig worryfree operatio i all climates ad coditios. These productio stadards are the reaso Megger is the world leader i eletrical testig equipmet. Whe you eed the very best at your side, Megger is the ame you ca deped o to help you power o. 22 Relay Protectio Catalog www.megger.com