Transcription

PD ScanOnline Partial Discharge Handheld ScannerUSER GUIDEIssue:Article number:D (02/2020) - EN863911

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Consultation with MeggerConsultation with MeggerThe present system manual has been designed as an operating guide and forreference. It is meant to answer your questions and solve your problems in as fast andeasy a way as possible. Please start with referring to this manual should any troubleoccur.In doing so, make use of the table of contents and read the relevant paragraph withgreat attention. Furthermore, check all terminals and connections of the instrumentsinvolved.Should any question remain unanswered or should you need the help of an authorizedservice station, please contact:Megger LimitedSeba DynatronicMess- und Ortungstechnik GmbHArchcliffe RoadKent CT17 9ENT: 44 1304 502100F: 44 1304 207342E: [email protected] 6D - 96148 BaunachT: 49 9544 68 – 0F: 49 9544 22 73E: [email protected] KMTKabelmesstechnik GmbHMegger USARöderaue 41D - 01471 Radeburg / DresdenValley Forge Corporate Centre2621 Van Buren AvenueNorristown, PA 19403 USAT: 1 610 676 8500F: 1 610 676 8610T: 49 35208 84 – 0F: 49 35208 84 249E: [email protected] MeggerAll rights reserved. No part of this handbook may be copied by photographic or other means unless Meggerhave before-hand declared their consent in writing. The content of this handbook is subject to change withoutnotice. Megger cannot be made liable for technical or printing errors or shortcomings of this handbook.Megger also disclaims all responsibility for damage resulting directly or indirectly from the delivery, supply, oruse of this matter.3

Terms of WarrantyTerms of WarrantyMegger accept responsibility for a claim under warranty brought forward by a customerfor a product sold by Megger under the terms stated below.Megger warrant that at the time of delivery Megger products are free from manufacturingor material defects which might considerably reduce their value or usability. Thiswarranty does not apply to faults in the software supplied. During the period of warranty,Megger agree to repair faulty parts or replace them with new parts or parts as new (withthe same usability and life as new parts) according to their choice.This warranty does not cover wear parts, lamps, fuses, batteries and accumulators.Megger reject all further claims under warranty, in particular those from consequentialdamage. Each component and product replaced in accordance with this warrantybecomes the property of Megger.All warranty claims versus Megger are hereby limited to a period of 12 months from thedate of delivery. Each component supplied by Megger within the context of warranty willalso be covered by this warranty for the remaining period of time but for 90 days atleast.Each measure to remedy a claim under warranty shall exclusively be carried out byMegger or an authorized service station.This warranty does not apply to any fault or damage caused by exposing a product toconditions not in accordance with this specification, by storing, transporting, or using itimproperly, or having it serviced or installed by a workshop not authorized by Megger.All responsibility is disclaimed for damage due to wear, will of God, or connection toforeign components.For damage resulting from a violation of their duty to repair or re-supply items, Meggercan be made liable only in case of severe negligence or intention. Any liability for slightnegligence is disclaimed.Since some states do not allow the exclusion or limitation of an implied warranty or ofconsequential damage, the limitations of liability described above perhaps may notapply to you.4

ContentsContentsConsultation with Megger .3Terms of Warranty .4Contents .5General Notes .71Technical description .91.1System description .91.2Technical data .121.3Connection, display and control elements .152Principles of operation .162.1General operation.163Using/attaching the sensors provided .194Performing measurements .244.1First steps .244.24.2.14.2.1.14.2.1.24.2.2Preparing a measurement .27Creating a measurement data folder.28Scanning the QR code on the measurement object .28Creating a folder manually .30Selecting the operating mode .314.3Measuring the ambient noise level.334.4Standard measurement .344.5TEV comparative measurement between an internal and external sensor .384.6TEV measurement sequence .404.7Evaluation of the measurement results .425Settings .445.15.1.15.1.2Device settings .45Importing and exporting configuration and comparison data .46Pairing Bluetooth headphones .485.2Operating mode settings .495.3Adjusting the evaluation thresholds .515.4PRPD diagram display settings .525.5System information.536Processing the measured data .546.16.1.16.1.26.1.2.16.1.2.2Transmitting measurement data to a mobile device .54Transferring the data via USB OTG adapter .54Transferring data via PD Scan WMSD mass storage devices (optional) .55Connecting .56Managing measurement data and settings via the user interface .585

Contents6.2Transferring measured data onto a PC .626.3Preparing a report .637Using the demonstrator box .678Maintenance and care .709Troubleshooting .726

General NotesGeneral NotesSafety precautions This manual contains basic instructions for the commissioning and operation of thedevice / system. For this reason, it is important to ensure that the manual is alwaysavailable to the authorised and trained operator. He needs to read the manualthoroughly. The manufacturer is not liable for damage to material or humans due to nonobservance of the instructions and safety advices provided by this manual.Locally applying regulations have to be observed!Signal words and The following signal words and symbols are used in this instruction manual and also onsymbols used the product itself:Signal word /symbolDescriptionDANGERIndicates a potential danger that will lead to fatal or seriousinjuries, if it is not avoided.WARNINGIndicates a potential danger that may lead to fatal or seriousinjuries, if it is not avoided.CAUTIONIndicates a potential danger that may lead to moderate or minorinjuries, if it is not avoided.NOTEIndicates a potential danger that may lead to material damage, if itis not avoided.Serves to highlight warning and safety information in theinstruction manual.A sticker on the product serves to identify the sources of dangerand the safe handling of these dangers is ensured by reading theinstruction manual.Serves to highlight warning and safety information which explicitlyrefers to danger of electric shock.Serves to highlight important information and useful tips foroperating the product. Failure to observe them can render themeasurement results useless.The parabolic acoustic sensor AA PR400 is fitted with a class 2laser.The available laser beam is therefore only within the visiblespectral range (650 nm). It is not harmful to the eye in the event ofbrief periods of exposure (up to 0.25 sec.). Longer periods ofexposure are prevented by the natural corneal reflex.7

General NotesWorking with products It is important to observe the generally applicable electrical regulations of the country infrom Megger which the device will be installed and operated, as well as the current national accidentprevention regulations and internal company directives (work, operating and safetyregulations).After working on the system, it must be voltage-free and secured against reconnectionas well as having been discharged, earthed and short-circuited.Use genuine accessories to ensure system safety and reliable operation. The use ofother parts is not permitted and invalidates the warranty.Operating staff The system may only be installed and operated by an authorised electrician. DIN VDE0104 (EN 50191), DIN VDE 0105 (EN 50110) and the German accident preventionregulations (UVV) define an electrician as someone whose knowledge, experience andfamiliarity with the applicable regulations enables him to recognise potential hazards.Anyone else must be kept away!Declaration of The product meets the following security requirements of the European CouncilConformity (CE) Directives: Radio Equipment Directive (RED 2014/53/EU) RoHS Directive (2011/65/EU) Artificial Optical Radiation Directive (2006/25/EC)Device transportation The transportation of lithium batteries, as well as devices in which such batteries orrechargeable batteries are installed, is governed by regulations that are based on themodel regulations of the United Nations for the transport of dangerous goods on land(UN document ST/SG/AC.10-1).Inform yourself about the transport regulations and observe them when transporting thedevice.Use of third party This product contains protected software, which is licensed under the General Publicsoftware License (GPL) and the Lesser General Public License (LGPL). This certifies your right torequest the source code for these software components.You can find detailed information on the GPL/LGPL licenses under www.gnu.org. Used trademarks The Bluetooth word mark and logos are registered trademarks owned by BluetoothSIG, Inc. and any use of such marks is under license.Intended use The operating safety of the system delivered is only guaranteed in the event of intendeduse (see page 9). Incorrect use may expose the operator, the system and anyequipment connected to risks.The thresholds listed in the technical data may not be exceeded under anycircumstances.8

Technical description1Technical description1.1System descriptionIntended use Defects on medium and high voltage components not only require costly repairs, butcan also lead to failures of network sections with associated adverse consequences. Itis therefore in the interest of all network operators to be able to detect signs of imminentdefects as early as possible so as to take suitable countermeasures promptly.Megger is offering a lightweight, robust and portable measuring device in the form thePD Scan which allow a range of operating equipment to be examined quickly for partialdischarge signals.The PD Scan is used for early detection of partial discharges in medium voltagesubstations and other electrical operating equipment. The convenient device featurestwo internal sensors (TEV, airborne acoustic) for this purpose, and can also be operatedwith a range of external sensors (TEV, HFCT, airborne acoustic, acoustic contactprobe). The device can be operated by using three soft buttons and by using the touchdisplay.All components (sensors and accessories) which may be used with the PD Scan aredescribed in this manual. The product delivered to customers is, in fact, always acustomer-specific configuration. At present, four versions exist (“Basis” and “Pro”), eachhoused in a special case.Performance features The PD Scan combines the following features in one device: Measurement of partial discharge signals (inductive, capacitive and acoustic) Simple operation using a touchscreen or operating buttons High-performance internal rechargeable battery enables long operating time USB port Function testing Integrated camera QR code scanner Measured data evaluation Recording of the measured data and reporting using the MeggerBook ReportingEdition9

Technical descriptionIncluded in delivery The PD Scan is available in four different, application-based versions (set 1 to 4).Depending on the set purchased, the maximum scope of delivery includes the followingcomponents:Component1234Item numberPD Scan, handheld PD scanner1009814USB stick with instruction manual and reportingsoftware2010642Charger90025102USB connection cable, type C90027768Headphones adapter cable90026232 90026230Bluetooth headphones90028677Function tester, FC 11010219Temperature and humiditysensor (with two additionalprotective caps)1010217External TEV sensor,C900-PD1010524HFCT sensor, SC40 connection cable1009667 90026538Parabolic acoustic sensor, AAPR400-11012287Flexible airborne acousticsensor, AA FR1301009757Acoustic contact probe,ACP 301010420Transport case9002622790031295USB in-car charger9002840710

Technical descriptionCheck contents Check the contents of the package for completeness and visible damage right afterreceipt. In the case of visible damage, the device must under no circumstances be takeninto operation. If something is missing or damaged, please contact your local salesrepresentative.Optional accessories / When required, you can order the following accessory parts and upgrade kits from theUpgrade kits usual sales channels:Option / KitDescriptionItem numberUpgrade kit set1 to set 4Includes a parabolic acoustic sensor, flexibleacoustic sensor, acoustic contact probe, HFCTsensor, Bluetooth headphones and largertransport case1011550Upgrade kit set2 to set 4Includes a parabolic acoustic sensor, flexible1011551acoustic sensor, acoustic contact probe, Bluetooth headphones and larger transport casePD ScandemonstratorboxIncl. transport case and batteries1011423PD Scan-WMSD Wireless mass storage device that can be used forrapid data transfer and as a power bank1012538Coupling pasteFor improved signal coupling when using theacoustic contact probe1007238USB in-carchargerFor charging using a 12 V onboard power supply90028407HFCT sensorHFFCT 20HFCT sensor forpermanent installation with 20mm diameter1006296 90026538HFCT sensorHFCT SC60Split-core HFCT sensor with20 mm inner diameter101268111

Technical description1.2Technical dataThe PD Scan is defined by the following parameters:ParameterValuePD Scan HandheldDisplay3.5" touch display, 320 x 240 pixelsBatteryLi-ion rechargeable battery; 3.6 V, 3.35 AhOperating time 8 hoursCharger input90 to 264 V AC, 50 / 60 HzCharger output5 V DCInterfacesUSB type C (charging, headphones, PC)Bluetooth Connection socket for external sensorsMemory32 MB internal memory /up to 1000 measurementsIP protection class (in accordance withIEC 60529 (DIN VDE 0470-1))IP54Operating temperature-10 to 55 C; 30 C 93% r.h.Storage temperature-20 to 70 C; 40 C 95% r.h.Dimensions W x H x D220 mm x 80 mm x 30 mmWeight420 gTEV sensors (internal and C900-PD)Measurement rangeBandwidthResolutionAccuracyMax. number of pulses per cycleMin. level for pulse counter-10 to 80 dBmV2 to 80 MHz1 dBmV 1 dBmV 122610 dBmVAcoustic sensors (internal, AA PR400, AA FR130) andsolid borne vibration sensor ACP 30Measurement rangeResolutionAccuracyConverter centre frequencyLaser (AA PR400 only)-10 to 70 dBµV1 dB 1 dB30, 40 and 80 kHzClass 2 (max. 1 mW)12

Technical descriptionParameterValueHFCT sensorsHFCT SC40HFCT 20(optional)HFCT SC60(optional)YesNoYes-10 80 dB-10 80 dB-10 80 dBBandwidth100 kHz 20 MHz100 kHz 150 MHz100 kHz 20 MHzResolution1 dB1 dB1 dB 1 dB/ 10 1 dB/ 10 1 dB/ 10ca. 4 Ωca. 4.2 Ωca. 4 Ω50 Ω50 Ω50 Ω 1226 1226 1226-20 . 55 C-20 . 55 C-20 . 55 CApplication areaIndoorIndoorIndoorInner diameter in mm40 x 22216085 x 93 x 2272 x 48 x 26116 x 145 x 21250 g240 g500 gSplit-coreMeasurement rangeAccuracyTransfer impedanceInput resistanceMax. number of pulses per cycleOperating temperatureDimensions (W x H x D) in mmWeightFunction tester FC1BatteryTransmitted TEV levelLithium button cell (CR1216 / 3 V, 25 mAh)25 dB 5 dBThe optional demonstrator box is defined by the following parameters:ParameterValueInternal batteries4 x AA batteryOperating time 50 hours (if standard AA batteries with2000 mAh are used)Level of transmitted pulsesAdjustable (low, moderate, high, random)Transmitted pulses per cycleAdjustable (2, 8, 20, random)Frequency of acoustic pulses40 kHzIP protection class (in accordance withIEC 60529 (DIN VDE 0470-1))IP42Operating temperature-10 . 55 C; 30 C 93% r.h.Storage temperature-20 70 C; 40 C 95% r.h.Dimensions W x H x D235 x 73 x 135mmWeight795 g13

Technical descriptionThe optional PD Scan WMSD mass storage device is defined by the followingparameters:ParameterValueInternal memory8 GBPortsWi-Fi (2.4 GHz)USB Type A (data transfer)Micro USB (charging)BatteryLi-ion battery: 3.6 V, 4.7 AhOperating time10 hoursCharging time5 hoursDimensions W x H x D150 x 29 x 92 mmWeight280 gIP rating (according to IEC 60529 [DINVDE 0470-1])IP21Operating temperature-20 to 60 CStorage temperature-25 to 70 C.Relative humidity93% at 30 C (non-condensing)14

Technical description1.3Connection, display and control elementsThe PD Scan features the following connection, display and control elements:Element DescriptionLED for displaying the charging activitySocket for connecting external sensorsOn/off switch, back to higher menu levelTouch displayTEV sensor contact areaCamera/QR code scannerUltrasonic microphoneSoft buttons with changing functionalityUSB port for data transfer, headphones and charger15

Principles of operation2Principles of operation2.1General operationBasic operation The device can be operated using the touch display or the three soft buttons. Brieflytapping the screen or the soft button positioned below the required symbol selects therequired function: Exit measuring mode, selection window or menu Select confirm function/setting;call up selected menu item Save the measured values Scroll through menu/access required function Continue to the next measurement screen Switch over to editing mode to change entries Undo changes/exit menu without saving Keypad control for input of names and numbers(press briefly: continue to character field or keypad; pressand hold: applies the letters or number selected) Start scanning a QR code Continues the measurement after pausing Jump back one step during a TEV sequence measurement16

Principles of operationSpecial functions Along with the standard functions which can be accessed using the three buttons at theduring the lower edge of the display, the following special functions can be activated during themeasurement actual measurement:ActionBriefly tapping themeasurement screenFunctionThe measurement is paused and the current measurementresults are frozen. If headphones are connected to thedevice, then the acoustic, audible signal is also muted.Instead of thebutton, the button used to continuethe measurementnow appears at the bottom edge ofthe screen. Briefly tapping the display again also allows themeasurement to be continued.Tapping and holding a The respective settings screen is called up. This would bethe menu for adjusting the evaluation thresholds in thespecific segmentexample shown.Once the required settings have been made, thebutton is used to the return to the measurement screen.Pressing and holdingthe screen selectionbuttonThe current measurement screen is saved as ascreenshot. A keypad for entering the file name appears.Pressing thebutton saves the screenshot in the datafolder for the current measurement. The software thenimmediately returns to the measurement screen.The screenshot function is not limited to the measurementscreens and can, for example, also be used in the menuscreens. The only exception are the text entry screens whichcannot be captured as screenshot.Pressing and holdingthe "Save" buttonOnly available when using an acoustic sensorAn audio stream of the input signal is recorded for10 seconds. The recording must be started manually bypressing thebutton. Pressing thebutton oncethe recording is complete saves the audio stream as a .wavfile in the data folder for the current measurement. If thedesired events are not recorded during the first recording, asecond recording can be started instantly by pressing.17

Principles of operationInput using the keypad This is used, for example, for the definition of folder names in which the measurementresults should be saved.Briefly pressing thebutton allows the user to scroll through the list of fields on thetouch screen. Pressing thebutton deletes the last character that was entered.Pressing and holding the button deletes all characters. You can switch to the numerickeypad by pressing. In addition to number keys, the keypad also has six freelyassignable keys for frequently used text modules.Briefly pressing a text module adds it to the end of the current character string. Pressingand holding the text module opens it for editing.Pressing thebutton saves the character string entered.18

Using/attaching the sensors provided3Using/attaching the sensors providedInternal acoustic The internal airborne acoustic sensor is used for the acoustic detection of partialsensor discharges. To do this, the front end of the PD Scan must be aligned with the openingsin the substation, or directly with the freely accessible test object.The distance to the measurement object should always be roughly the same, whenpossible, to ensure the measured values recorded are comparable.Internal TEV sensor The internal TEV sensor measures electromagnetic waves. To do this, the front end ofthe PD Scan is held at the surface of the substation, preferably close to anyopenings/gaps in the substation.Flexible This external, acoustic sensor is specially designed for openings, air holes and gaps,airborne acoustic out of which the acoustic waves of the partial discharges can escape from thesensor switchgear.19

Using/attaching the sensors providedParabolic acousticsensorDANGERDanger of injuries to the eyes due to laser beam Avoid direct exposure to the eyes!This external sensor is suitable for acoustic measurements indoors or outdoors onsystems on which direct measurements are not possible. The maximum distancepossible is largely dependent on the level of the exciter and the ambient conditions(humidity, temperature and reflection points). When weather conditions are adverse, thesignal can be attenuated by up to 2 dB/m by the air alone.Using the parabolic acoustic sensor allows the distance to be increased by around tentimes while retaining the same level in comparison to an internal acoustic receiver. If theinternal acoustic receiver allowed a reading of, for example, 20 dBµV to be taken at adistance of 1 m to the measurement object, then parabolic acoustic sensor allows thesame level to be recorded at a distance of around 10 m. As for the internal acousticsensor, the following applies: The distance to the measurement object should always beroughly the same, when possible, to ensure the measured values recorded arecomparable.Before use, the handle with the integrated laser pointer must be attached to theparabolic concentrator. A magnetic lock provides the necessary support. Whenassembling, make sure that the two notches indicated in the picture below are in linewith the retractable sight.20

Using/attaching the sensors providedThe sensor features a laser pointer that is activated by pressing a button, and which canbe aligned with the measurement object. This ensures the microphone is optimallyaligned. The parabolic umbrella acts as a light filter and ensures that the red laser pointis easier to detect.Alternatively, the object being measured can also be "targeted" via the notch and thepost using the front and rear sight principle.Acoustic contact probe(ACP 30) NOTEDanger of damage in the event of shocks and impact stressThe acoustic contact probe contains a Piezo element, which can suffer irreparabledamage due to shocks or impact stress and which can cause the sensor to makeinaccurate measurements.The sensor should therefore be treated carefully, and be placed down on the metalsurface gently.This external sensor measures solid borne vibrations on the surfaces of substations. Todo this, the magnetic sensor is attached to the measuring point.This measurement is ideally suited for substations with a single enclosure and on whichairborne acoustic measurements cannot be conducted.It is essential that this type of sensor is used correctly. The sensor head must be placedflush on a surface that is as smooth as possible. Even the smallest air inlets pose a riskof preventing signals caused by partial discharges from being measured.21

Using/attaching the sensors providedWhen using the sensor, you must observe the following: Clean contact surfaces before measuringBefore using the sensor, you must remove any dust particles and irregularitiesthat will prevent the sensor from making full contact with the surface. Apply a coupling agentFor rough or uneven surfaces, you must apply a coupling agent to the surfacebefore performing the measurement to provide a better signal coupling. For thispurpose, we recommend using the coupling paste that is available as anoptional accessory (see page 9). Identify and prevent noise interferenceYou must ensure that the measurement is not impaired or masked by unwantedsignals (such as noises and vibrations caused by transformers or motors). If thisis the case, the offending device must be switched off or the measurement mustbe taken at a later date.22

Using/attaching the sensors providedExternal TEV sensor As soon as the external TEV sensor is connected, every TEV measurement is(C900-PD) performed automatically via this sensor. This sensor can also be used in hard-to-reachplaces and, thanks to its built-in magnet, can be attached to metallic surfaces.In addition, when an external TEV sensor is connected, this can be used to perform acomparison measurement with the internal TEV sensor (see page 38). In this case, theexternal TEV sensor must be placed parallel to the internal sensor on the objectselected for the comparison measurement (e.g. on a neighbouring switch cabinet) whilethe measurement is being performed.HFCT sensor (HFCT)WARNINGDanger of fatal injury due to electric shockBefore an HFCT sensor is attached, it is imperative that the five safetyrules are followed:1. Disconnect the power2. Secure against reconnection3. Check for presence of voltage4. Make earth connection and short-circuit5. Cover or block access to adjacent components which are liveThe HFCT sensor is suitable for inductive decoupling of PD pulses directly on cableends. To do this, the magnetically closing sensor must be installed on the ground wireconnected to a cable end.In principle, the PD Scan can also be used in combination with other HFCT couplers, aslong as they feature an accessible BNC interface. However, depending on the sensorused, this may result in differences in the level display. The PD Scan has been preciselyharmonised with the HFCT sensor in terms of its measurement accuracy.23

Performing measurements4Performing measurementsDANGERDanger to life from electric shock or electric arcsTo avoid any electrical hazards when starting up and using the PD Scan,the following instructions must be followed: All notices, instructions, rules of conduct and operating manuals of thefacility manager/plant operator must be complied with! When approaching live equipment, the safe distances applicable forthe corresponding voltage level must be observed at all times!Information regarding the minimum distances to be observed must beobtained from the facility manager/plant operator before beginningwork. Antennas which are connected to the detector for measuring purposesare c

Hagenuk KMT. Kabelmesstechnik GmbH. Megger USA. Röderaue 41 D - 01471 Radeburg / Dresden . . Megger agree to repair faulty parts or replace them with new parts or parts as new (with the same usability and life as new parts) according to their choice. . Use genuine accessories