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Megger DELTA4000 Instruction Manual Download Page 72

M 
 

 

AVTMDELTA4000-EN Rev 6 April 2018 

64 

A calibration kit is provided as an optional accessory. This allows for traceable 

calibration locally without sending the unit to factory. 

Factory calibration is of course also available. Contact your local Megger 
representative for details 

Recommended calibration interval is 1-3 years. 

Troubleshooting 

General Guidelines 

This section provides general guidelines for basic troubleshooting of the 

DELTA4000. The DELTA4000 undergoes rigorous testing before being 
shipped from the factory; however, when it is subjected to various field 

conditions, there is always the possibility of damage being done to the 

instrument or its cables. This troubleshooting section does not attempt to cover 

all possibilities, but does list suggestions that can be carried out in the field. 
There may be problems that require the unit to be returned to the factory for 

repair. 

If questionable readings are obtained, the first step is to check the calibration of 

the DELTA4000 using Megger’s Capacitance and Dissipation Factor Standard 
(Cat. No. 670500-1). If the standard is not available, the next step is to test a 

specimen with a stable known value e.g. the TTR capacitor or one of the 

capacitors in the Megger capacitor kit. If such a specimen is not available, then 

perform the following procedure for an "Open Air Test." 

Open Air Test 

The purpose of this test is to check the overall functionality of the DELTA4000, 
including the high-voltage cable. The readings obtained show the stray signal 

losses of the high-voltage cable. 

1.

 

Connect the wing nut ground terminal of the test set to a low impedance 

earth ground using the ground cable supplied. 

2.

 

Connect the control unit to the high-voltage unit using the two 

interconnection cables. 

3.

 

Connect the external interlock cables to the SAFETY INTERLOCK 

receptacles. 

4.

 

Connect the high-voltage cable to the HV OUTPUT terminal of the 

high-voltage unit (power supply). Be sure that the connector locks in 

place.  

Summary of Contents for DELTA4000

Page 1: ...struction Manual DELTA4000 12 kV Insulation Diagnostic System HIGH VOLTAGE EQUIPMENT Read this entire manual before operating M Valley Forge Corporate Center 2621 Van Buren Avenue Norristown PA 19403 2329 U S A 610 676 8500 www megger com ...

Page 2: ......

Page 3: ...DELTA4000 12 kV Insulation Diagnostic System ...

Page 4: ...epairing at our option defective equipment Equipment returned to the factory for repair must be shipped prepaid and insured Contact your MEGGER representative for instructions and a return authorization RA number Please indicate all pertinent information including problem symptoms Also specify the serial number and the catalog number of the unit This warranty does not include batteries lamps or ot...

Page 5: ...ories 13 4 Controls Indicators and Connectors 15 Control Unit Side Panel 15 High Voltage Unit Connector Panel 18 DELTA4310A Top Panel Features 19 5 Setup and Operation 21 Safety Precautions 21 Setup 22 6 Delta Control User Interface 27 Introduction 27 Operation 28 Test Mode 28 UST mode 28 GST mode 28 Test Mode Examples 29 Two winding transformer test 29 Three winding transformer test 30 Frequency ...

Page 6: ...DELTA4000 with PowerDB 44 Test Form Controls General 45 General Options 46 Nameplate Header Input 48 8 Performing Tests within Forms 51 Description of Tests 52 Transformer Overall Tests 52 Overall Test Options 53 Bushing C1 Tests 55 Bushing C2 Tests 56 Surge Arresters 57 Bushing Hot Collar Tests 58 Ratio Tests 58 Exciting Current Tests 60 Multiple Quick Tests 61 9 Maintenance and Calibration 63 Ma...

Page 7: ...o operation check for loosened hardware or damage incurred during transit If these conditions are found a safety hazard is likely DO NOT attempt to operate equipment Please contact Megger as soon as possible DELTA4110 Transformer Test Set DELTA4300A Transformer Test Set ...

Page 8: ......

Page 9: ...ntamination fractures punctures and other defects that accompany the aging of insulation The test set comprises of a control unit a high voltage unit cables and canvas carrying bags Refer to the Specifications section for a list of included accessories Tests are made by measuring the capacitance and dissipation factor power factor of a specimen The values measured will change when undesirable cond...

Page 10: ...n to be tested without the need for special resonating inductors Advanced signal acquisition and noise suppression circuitry results in 25 50 shorter measurement times Individual temperature correction ITC feature enables an accurate temperature correction of measurements taken at high and low temperatures Temperature table corrections are no longer required Two operation modes Form based automate...

Page 11: ...k to ground the high voltage conductor A safety ground jumper must then be installed between all terminals of apparatus under test and ground Always disconnect test leads from test specimen before attempting to disconnect them at the test set The ground connection on the test set must be the first made and the last removed Any interruption of the grounding connection can create an electric shock h...

Page 12: ...ny device other than specifically described Never connect the test set to energized equipment Operation is prohibited in rain or snow Do not use the test set in an explosive atmosphere A qualified operator should be in attendance at all times while the test equipment is in operation Observe all safety warnings marked on the equipment Corrective maintenance must only be performed by qualified perso...

Page 13: ...ved These notices appear in the format shown below and are defined as follows F WARNING Warning as used in this manual is defined as a condition or practice which could result in personal injury or loss of life G CAUTION Caution as used in this manual is defined as a condition or practice which could result in damage to or destruction of the equipment or apparatus under test ...

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Page 15: ...505 Hz 250 V Details relating to frequency range 45Hz 350Hz 12 kV 100mA continuous 45Hz 350Hz 12 kV 300mA 4 minutes 45Hz 400 Hz 10 kV 100mA continuous 45Hz 400Hz 10 kV 300mA 4 minutes Max Current mA Max Voltage kV Frequenc y Hz Capacitanc e nF 300 12 60 67 300 8 60 100 300 6 60 133 300 4 60 200 300 2 60 400 300 12 45 89 300 8 45 133 300 6 45 178 300 4 45 267 300 8 30 200 300 6 30 267 300 4 30 400 ...

Page 16: ... 1 mH maximum resolution Power Factor 0 to 100 0 001 maximum resolution Dissipation Factor 0 to 100 0 001 maximum resolution Watt Loss 0 to 2 kW actual power 0 to 100 kW when corrected to 10 kV equivalent 0 1mW maximum resolution The measurement can be corrected to either 2 5 kV or 10 kV equivalents Temperature Correction Individual temperature correction ITC from 5 C to 50 C test temperature to 2...

Page 17: ...Luminance 1600 nits Coating anti glare Backlight LED Technology 4 wire resistive touchscreen Memory 32 Gigabits SSD Data Storage Internal computer Up to 100 000 data sets up to 32GB External Pending external computer and or flash memory size Control Software PowerDB and Delta Control Safety Qualifications IEC ANSI 61010 1 Environment Temperature Operating 20 to 55 C Storage 50 to 70 C Relative Hum...

Page 18: ...10 HV Unit 22 kg 48lbs Standard cables 14 kg 30lbs Test Modes DELTA4000 supports the following test modes UST Ungrounded Specimen Testing Test mode Measure Ground Guard UST R UST B UST RB Red Blue Red and Blue Blue Red GST Grounded Specimen Testing Test mode Measure Ground Guard GST GND GSTg R GSTg B GSTg RB Ground Ground Ground Ground Red and Blue Blue Red Red Blue Red and Blue ...

Page 19: ... 50 60Hz Test Volts kV Maximum Capacitance µF 100 mA continuos service Maximum Capacitance µF 300 mA for 4 minutes 60 Hz 50 Hz 60 Hz 50 Hz 0 025 11 13 32 38 0 05 5 3 6 3 16 19 0 1 2 6 3 2 7 9 9 5 0 25 1 1 1 3 3 2 3 8 0 5 0 53 0 63 1 6 1 9 1 0 26 0 32 0 79 0 95 2 0 13 0 16 0 40 0 48 3 0 09 0 11 0 27 0 32 4 0 065 0 080 0 20 0 24 5 0 11 0 063 0 16 0 19 6 0 044 0 055 0 13 0 16 8 0 033 0 040 0 099 0 12...

Page 20: ... must be closed to energize high voltage circuit Dual ground required to energize high voltage circuit Circuit breaker for short circuit protection All controls at ground potential Over voltage protective devices prevent damage to test set in the event of specimen breakdown Low voltage inputs are grounded when the test set is turned off or between measurements ...

Page 21: ...ft 1001 852 HV unit power cable 1 m 3 ft 2002 132 HV unit control cable 1 m 3 ft 2002 133 Ground lead cable 1 m 3 ft 2002 134 USB cable 3 m 10 ft 2002 135 Ethernet cable CAT 5 3 m 10 ft 2002 136 Canvas bag for HV cable 2001 507 Canvas bag for other cables accessories 2005 265 USB with PowerDB DELTA Manual Control software User Guide Application Guide and Data Sheets 1010 048 Warranty 1 year Option...

Page 22: ...p 1004 716 Hot collar belts 3 670505 Bushing tap connectors 2 670506 USB bar code wand and software 36528 Standard Accessory kit includes 670501 Mini bushing tap connectors set of 2 670506 Hot collar straps set of 3 1 1m 0 6m 0 3m length 670505 Thermometer hygrometer clock 1 670504 Temperature and humidity probe complete with 20 ft 7 m lead 2002 138 0 75 bushing tap adapter 1 30918 000 1 bushing t...

Page 23: ...AVTMDELTA4000 EN Rev 6 April 2018 15 4 Controls Indicators and Connectors Control Unit Side Panel Figure 1 Side Panel Control Unit ...

Page 24: ...ck wiring must be run as a twisted pair to minimize electromagnetic coupling into the system This interlock system should be wired such that connection is made to the A and B sockets of the SAFETY INTERLOCK receptacle When the interlock loop is opened the test is automatically terminated INPUT RED Plug receptacle for connecting the red low voltage test lead INPUT BLUE Plug receptacle for connectin...

Page 25: ...tance range HV CONTROL Receptacle for the control cable between the control and HV units MAINS Receptacle for connecting the test set to an AC power source as marked on panel TEST GROUND Receptacle for connecting the test ground cable between the test set and ground normally station ground near the test object GROUND This wing nut is for connecting an additional safety ground between the control a...

Page 26: ...ween the control and HV units GROUND This wing nut is for connecting an additional safety ground between the control and HV units HV Output Receptacle for the high voltage cable located on the side exterior of the equipment box Comes with a spring loaded lock mechanism to secure HV cable NOTE The HV cable is connected on the other side of the unit Note the sliding pin to secure the cable Do NOT us...

Page 27: ... USB Port Used for various functions including external memory and external mouse keyboard control 4 Rear USB Port Hub Used for external Megger instrument control such as TTR300 TTR310E S1 MIT Insulation test set MLR10 5 Rear Ethernet Port Used for external Megger instrument control specifically the MTO300 TTR310E MTO250 The DELTA4310A 300 mm 12 inch display is meant to replace a customer PC with ...

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Page 29: ...ll safety procedures Make certain that no one can come in contact with the high voltage output terminal or any material energized by the output Be aware that when testing power cables high voltage will be present at the remote end of the cable Use protective barriers if necessary Locate the control unit and high voltage unit in an area which is as dry as possible Maintain adequate clearances betwe...

Page 30: ... winding on itself with a jumper lead to eliminate winding inductance effect The shorting wire is usually non insulated and must not be in contact with any other insulated or non insulated parts of the transformer When making transformer excitation current measurements conduct all tests on high voltage windings only This reduces the required charging current In load tap changers set to fully raise...

Page 31: ...d Operation AVTMDELTA4000 EN Rev 6 April 2018 23 Figure 4 Typical Test Setup for AC Insulation Testing of a Three Phase Two Winding Power Transformer DELTA4000 HIGH VOLTAGE UNIT DELTA4000 TEST SET CONTROL UNIT ...

Page 32: ...et type plugs are fully locked on the receptacles 4 Connect the measurement cable with the red colored boot to the INPUT RED receptacle Make sure the connector locks to the receptacle If required connect the measurement cable with the blue colored boot to the INPUT BLUE receptacle 5 Connect the external interlock cables or a test area interlock system to the INTERLOCK 1 and 2 receptacles Make sure...

Page 33: ...st specimen 11 Remove all safety grounds from the specimen to be tested 12 Start DELTA4000 by closing the main breaker For DELTA4110 with external computer 1 Connect the Ethernet or possibly USB Ethernet is preferred cable between DELTA4110 and the computer For using Delta Control SW 1 Start Delta Control SW A connect to DELTA screen will appear Select USB or Ethernet communication 2 For TCP IP Et...

Page 34: ...LTA4000 you are using and if testing is performed automatically with PowerDB or manual with Delta Control SW the actual testing procedure will vary The following sections describe how to use DELTA4000 with external or internal computer using Delta Control and PowerDB SW ...

Page 35: ...re can be operated using a touch screen or mouse control simply by clicking on the buttons You may also tab between buttons using the keyboard The buttons changes its look as you push the button so it is easy to know which key or function that is activated All regular functions can be reached from this main screen panel Some buttons activates a popup screen where specific values and or configurati...

Page 36: ...est measurements are conducted UST mode Ground and Guard are internally connected Red and Blue terminals are either internally connected to be measured or internally connected to Ground and Guard In UST mode the center line refers to the terminal or terminals that are measured and the lower line refers to the terminal that is internally connected to Ground and therefore excluded from the measureme...

Page 37: ...18 29 Test Mode Examples Two winding transformer test When UST R is used for the CHL test the HV output terminal is to be connected to the primary winding and the red terminal to the secondary winding The blue terminal does not have to be connected in this case ...

Page 38: ...e primary winding the red terminal to the secondary winding and the blue terminal to the tertiary winding The blue terminal is in this case grounded guarded For CHT measurement UST B should be selected The blue terminal is now measured and the red is grounded The time saving benefit is that the transformer can be tested without the need for reconnections ...

Page 39: ... two parameters need to be set in order to start a measurement Test Type Select which Test you want to perform In the setting tab you set your preference for tan delta or power factor readings The available tests are Power Factor Tan Delta Power Factor or Tan Delta test is a semi automatic test sequence performed at a preset voltage and line frequency The system will ramp up the voltage to the set...

Page 40: ...Sweep allows the user to perform a series of tests over a frequency range and view results by depressing Graph button bottom left The voltage level used is set on main page and the frequency steps are set on the settings page Present frequency steps come factory set for optimal ITC calculation as well as allowing user to detect problem insulation conditions NOTE There are limitation of voltage lev...

Page 41: ...ing the set voltage target voltage You can click on this display to enter the target voltage or increase or decrease it using the buttons in the centre control Below the display area is a round control where you can manually adjust voltage up or down The single arrows step up or down in steps of 100 volts while the buttons with two arrows steps up or down in steps of 1000 volts The C button in the...

Page 42: ...rt button will not illuminate until both interlock switches are closed In manual mode you have a button for starting a measurement The start button is used to activate the output You can manually control output voltage using the Voltage control You can record and store a value to the log at any time by pressing the Measure button Press Stop or Esc to stop the output voltage Oscilloscope In the osc...

Page 43: ...nd led is on ensure that the ground potential of the test object where your ground is also connected and the instrument U ground is within 2 Ωs If using a generator ensure the U ground of the generator is connected to ground equal to the asset ground point The measurement cannot start if any of these led s are ON The green yellow red thermometer is related to internal instrument temperatures and R...

Page 44: ...rformed Auto Tip Up or Frequency Sweep measurements Also allows live update of graph as testing is conducted Log Show a log of measured values This includes multiple readings test such as Auto Tip Up and Frequency Sweep Help Shows a help file Status Accessing information about internal RH temperatures serial numbers and SW Firmware version Close Close Shut down Delta Control ...

Page 45: ...eral Under the general section you can change the default line frequency Specify if you want to display the values as power factor or tan delta You can also change the integration time between 3 and 200 seconds or set it to automatic Power Factor Tan Delta Here you can select either frequency variation default or line sync reversal for noise suppression If no suppression is selected you are allowe...

Page 46: ...in screen is reached You can select either frequency variation for noise suppression or no suppression which allows you to vary frequency for this test Results Specify if you want the measured values presented as either 10 kV equivalent or the actual measured values Frequency Sweep Set frequencies at which the frequency sweep will be made The default frequencies selected 470 220 110 70 40 20 10 4 ...

Page 47: ...Graph The graph dialog shows graphs of the measured values Results can be shown in log as well as linear scale for either axis and autoscales as results appear Numeric results of test can be seen under LOG Log The log shows all measured values from the performed tests ...

Page 48: ...ort the log as a comma separated file for processing in other software or store for future reference When exporting to CSV you can choose if you want to have a header or not and what type of decimal separator you want to use You may also mark suitable part of the log fields and simply use cut Ctrl C and paste it into e g excel Ctrl V ...

Page 49: ...rDB functions The presentation and testing methods within the built in controller are identical to the PowerDB Lite PC version No difference in operation exists except when upgrades between the PC and the DELTA4310A are not maintained by the user Upgrading the DELTA4310A is different than upgrading a PC Please refer to Megger website similar to http us megger com my account software downloads for ...

Page 50: ... download latest PowerDB Lite version available NOTE For DELTA4310A software version is available on our www megger com website located under Software Support and requires a user login It will load onto the DELTA4310A via the USB memory port on the control top The model is contained within the software and not obvious until PowerDB Lite software is loaded 1 Accept the terms of the License Agreemen...

Page 51: ...erface AVTMDELTA4000 EN Rev 6 April 2018 43 3 Select Default Settings Language and Units of Measure 4 Install Shield Wizard will complete the installation of PowerDB Lite Click Finish to close the installation program ...

Page 52: ...this file instead using Open Existing Results File PowerDB is designed to save data from several tests on one object in same file NOTE The Delta Control SW must also be installed to be able to run Delta4000 and perform measurements Viewing and reporting previous measurements can be done on a computer without a Delta Control installation and without connecting to the HW 1 Select a form to be used f...

Page 53: ...nu in Item i above ii Open Results or test setups to be used for viewing past results appending or retesting iii Save Prompts user to save results or rename file or save in PDF format iv Save to PDF Allows test report to be saved in a format which is shared or stored without need to have PowerDB to view results v Import Export Allows saving results as a CSV Excel file vi Select Instrument Allows c...

Page 54: ... 1 Language allows limited translation to French Spanish and German 2 Default units Imperial or Metric 3 Temperature Units C or F 4 Logos allows both left and right side of each form Image should be a bitmap for optimum quality 5 Misc Options allow enabling or disabling operational features within each form ...

Page 55: ...PowerDB User Interface AVTMDELTA4000 EN Rev 6 April 2018 47 Header can be hidden to allow optimum space for test results within each form ...

Page 56: ...r or right click to select primary and secondary vector until it matches Transformer Nameplate Transformer Nameplate Voltages Line to line only in volts Nameplate Power Rating Typically with no cooling operation Depress MVA to toggle to KVA Once filled in Rated I will calculate and display using parameters provided Taps Input from nameplate As well confirm NOMINAL tap positions are correct Tap Cha...

Page 57: ...f we know of the past result we use Open Results to locate and open the file from PowerDB Startup screen below We are now taken to our file folder system where we choose the file to open A pop up screen will appear listing all measurement dates for this test specimen and we are able to append open the individual measurement or perform a new test We are also given the option to delete any specific ...

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Page 59: ...e based on common assets tested in a substation or power generation station For this manual we will focus on the Two Winding Transformer form as highlighted below Discussion of Nameplate and Common Controls are described earlier in this manual We obtain the test voltage the temperature correction if we select the use of tables from the Nameplate Input We now select which tests we wish to conduct f...

Page 60: ...Tests 1 2 and 3 are completed Line 4 will populate with values calculated by subtracting Test 2 from Test 1 This is applicable for values of capacitance current and watts Line 4 is a calculated comparison to the direct measurements of Test 3 Values on these two lines should be essentially the same If they are not re check all connections and verify the proper operation of the test set If Test 3 an...

Page 61: ... done on a sample of oil drawn from the main tank of the transformer under test and a sample of oil drawn from the OLTC The test requires an oil test cell designed for field use The test cell should be a three terminal cell where connections for high voltage measurement lead and ground can be safely made As with the other insulation tests on this test form the test sequence is initiated by left cl...

Page 62: ...d to begin a test If Multiple Test is enabled all tests for a specific group are sequentially completed DFR if these boxes are checked a frequency sweep test is conducted and displayed in the DFR Graph below the Overall Tests Individual frequencies are defined in a list in PDB settings The maximum frequency range is pending the test voltage as described in the following table Test Voltage Maximum ...

Page 63: ...ter conductor and its test tap capacitance tap If a bushing does not have a test tap then the C1 measurement is not performed NOTE These tests may be performed with the bushing shorting leads still in place from the overall insulation tests This allows all the high side bushing C1 tests to be performed without having to move the HV lead from bushing to bushing It will still be necessary to move th...

Page 64: ...ween the test tap connection and the bushing mounting flange To perform a C2 test the HV lead is carefully connected to the bushing test tap and the Red lead is connected to the bushing center conductor Care should be taken not to cause physical damage to the test tap as the tap connection point may be a small pin or a flexible spring If this is the case use a small insulated jumper wire or a spec...

Page 65: ... described below assumes single stack arresters are being tested Nameplate serial number and location information for each arrester should be entered so that future testing can be compared to specific units Tests 28 to 36 are measurements of the arrester insulation Only test voltage current and watts are recorded for arresters The HV lead is attached to the arrester HV terminal No connection using...

Page 66: ...e hot collar tests can be performed on each bushing For each test the location of the strap should be clearly indicated on the form in the Designation column Ratio Tests Measurements of transformer winding ratio can be made with a high voltage power factor test set when a TTR capacitor is available Depending on the voltage rating of the winding being energized tests can be made up to 10kV The sign...

Page 67: ...nd the Red measurement lead directly to the capacitor Initiate the test by left clicking on the blue field for the Standard Capacitor Subsequent tests require the HV lead to be connected to one side of a HV winding e g H1 U A where the other side of the HV winding is grounded to the tank e g H0 N N The corresponding winding on LV side is grounded on one side and on the other side is connected to R...

Page 68: ...setting Unless conditions warrant future tests may be reduced to the tap settings as found For each test line on the form document the DETC De Energized Tap Changer and LTC Load Tap Changer tap settings and perform three tests per form line On WYE Y connected transformers connections would be H1 H0 U N A N H2 H0 V N B N and H3 H0 W N C N On DELTA D or WHYE Y without accessible neutral connected tr...

Page 69: ...complemented with additional measurements executed from the Multiple Quick Test sub form selected as a new test or as manual measurements in the standard test forms Check Manual in the select test boxes and a Multiple Quick Test table will be added at the end of the form In the field INSULATION TESTED you enter information on what to be tested TEST MODE set change the test mode SUPPRESS set change...

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Page 71: ...household all purpose spray cleaner sprayed on cloth can be used to clean the panel Polish with a soft dry cloth taking care not to scratch the display screen cover The cables and mating panel receptacles can be cleaned with isopropyl or denatured alcohol applied with a clean cloth Contamination of some parts of the high voltage circuit in particular the high voltage cable terminations and its mat...

Page 72: ...for repair If questionable readings are obtained the first step is to check the calibration of the DELTA4000 using Megger s Capacitance and Dissipation Factor Standard Cat No 670500 1 If the standard is not available the next step is to test a specimen with a stable known value e g the TTR capacitor or one of the capacitors in the Megger capacitor kit If such a specimen is not available then perfo...

Page 73: ... perform a general GST GND test When test is completed observe test results The results should be as follows Capacitance between 4 0 and 8 0 pF DF or PF between 1 0 to 2 0 Watts 10 kV between 0 002 to 0 006 mA 10 kV between 0 015 to 0 030 Repair Megger offers a complete repair service and recommends that its customers take advantage of this service in the event of equipment malfunction Please indi...

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