Megger DELTA4000 Instruction Manual
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Megger DELTA4000 Instruction Manual

12-kv insulation diagnostic system
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AVTMDELTA4000-EN
Rev 6
April 2018
Instruction 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

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Summary of Contents for Megger DELTA4000

  • Page 1 AVTMDELTA4000-EN Rev 6 April 2018 Instruction Manual DELTA4000 12-kV Insulation Diagnostic System HIGH VOLTAGE EQUIPMENT Read this entire manual before operating. Valley Forge Corporate Center 2621 Van Buren Avenue Norristown, PA 19403-2329 U.S.A. 610-676-8500 www.megger.com...
  • Page 3 DELTA4000 12-kV Insulation Diagnostic System...
  • Page 4 Specifications are subject to change without notice. WARRANTY Products supplied by Megger are warranted against defects in material and workmanship for a period of one year following shipment. Our liability is specifically limited to replacing or repairing, at our option, defective equipment.

  • Page 5: Table Of Contents

    Table of Contents 1 Introduction ................................1 Receiving Instructions ............................. 1 General Information ............................1 2 Safety ..................................3 Precautions ................................ 3 Warning and Caution Notices ........................5 3 Specifications ................................. 7 Technical Specifications ..........................7 Test Modes ..............................10 Maximum Specimen Capacitance ........................
  • Page 6 7 PowerDB User Interface ........................... 41 Introduction ..............................41 Minimum Recommended System ....................... 41 Software Installation (PC portion only) ..................... 42 Using DELTA4000 with PowerDB ......................44 Test Form Controls - General ........................45 General Options ............................. 46 Nameplate Header Input ......................... 48 8 Performing Tests within Forms ........................
  • Page 7 Prior to 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 9: Introduction

    Notify Megger of any shortage. Examine the instrument for damage received in transit. If damage is discovered, file a claim with the carrier at once and notify Megger, giving a detailed description of the damage. This instrument has been thoroughly tested and inspected to meet rigid specifications before being shipped.
  • Page 10 § Two-piece design for easy transportation Rugged and robust and only 14+22 kg (31+48 lb) § Handling up to 15 mA interference current into any lead of the instrument or a signal to noise ratio of 1:20, secures stable readings and correct data even in the highest interference switchyards.

  • Page 11: Safety

    Safety Precautions The test set and the specimen to which it is connected are a possible source of high-voltage electrical energy and all persons making or assisting in tests must use all practical safety precautions to prevent contact with energized parts of the test equipment and related circuits.
  • Page 12 It is not possible to eliminate all potential hazards from, and in using, electrical test equipment. For this reason, every effort has been made to point out in this instruction manual the proper procedures and precautions to be followed by the user in operating this equipment and to mark the equipment itself with precautionary warnings where appropriate.

  • Page 13: Warning And Caution Notices

    Safety Warning and Caution Notices Warning and caution notices are used throughout this manual where applicable and should be strictly observed. These notices appear in the format shown below and are defined as follows: WARNING Warning, as used in this manual, is defined as a condition or practice which could result in personal injury or loss of life.
  • Page 14 AVTMDELTA4000-EN Rev 6 April 2018...

  • Page 15: Specifications

    Specifications Technical Specifications Input Power: 100-240 V ± 10 %, 50/60 Hz, 16 A max Output voltage: 0 to 12 kV, continuously adjustable Test frequency range: 45-70 Hz (12 kV) 15-405 Hz (4 kV) 1-505 Hz (250 V) Details relating to frequency range: 45Hz –...
  • Page 16 Output power: 3.6 kVA Output Current: >100 mA, continuous output >300 mA, up to 4 minutes The output current capacity can be expanded to 4 A using the optional Resonating Inductor, catalog number 670600-1 Measuring Ranges: Voltage: 25 V to 12 kV, 1 V maximum resolution Current: 0 to 5 A, 0.1 A maximum resolution The measurement can be corrected to either 2.5 kV or...
  • Page 17 Specifications Noise Immunity: Electrostatic: 15mA induced noise into any test lead with no loss of measurement accuracy at maximum interference to specimen current of 20:1 Electromagnetic: 500 T, at 50 Hz in any direction Computer Interfaces: Printer: Communication: Ethernet and USB Industrial Controller Touchscreen Display (ruggedized for field use) (DELTA4310A):...

  • Page 18: Test Modes

    DELTA4300A Control 15kg (31lbs) Unit (with on-board computer): DELTA4110 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 Blue UST-B Blue...

  • Page 19: Maximum Specimen Capacitance

    Specifications Maximum Specimen Capacitance Table 1 shows the maximum measurable specimen capacitance at various voltages and loading time. This can be increased up to 1.2µF at 10 kV (50 Hz) test voltage using the optional Resonating Inductor. Table 1: Maximum Measureable Specimen Capacitance at 50/60Hz Maximum Capacitance Maximum Capacitance (µF)

  • Page 20: Safety Features

    Safety Features Safety features include; § External hand plus foot (second external hand switch is optional) interlock switches 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. §...

  • Page 21: Accessories

    Specifications Accessories Included Accessories High voltage lead: 21 m (70 ft), double shielded 30012H-11 HV Cable Accessory Kit (Universal high voltage clip, small 1010-333 alligator clip, high voltage hook, female quick disconnect & tether rope with hooks) Measurement lead, color-coded red, 21 m (70 ft) 25572-1 Measurement lead, color-coded blue, 21 m (70 ft) 25572-2...
  • Page 22 Transport cart / trolley 2009-071 Calibration adjustment box set, CAL4000 2002-137 10KV Calibration reference standard, 100 pF 670500-1 Transit case for calibration standard 670635 HV TTR capacitor, single phase (10 nF, 10 kV) 36610 HV reference capacitor (100 pF, 10 kV) 36610-1 HV reference capacitor (1000 pF, 10 kV) 36610-2...

  • Page 23: Controls, Indicators, And Connectors

    Controls, Indicators, and Connectors Control Unit Side Panel Figure 1: Side Panel – Control Unit AVTMDELTA4000-EN Rev 6 April 2018...
  • Page 24 HV ON Warning signal indicating that the HV unit is active OPEN GROUND When lit, this yellow lamp indicates an open in double ground system or defective grounding of test set. SAFETY Two plug receptacles for connecting external INTERLOCK interlock switches. One hand interlock switch and 1 and 2 a foot switch are supplied;...
  • Page 25 Controls, Indicators, and Connectors STROBE Receptacle for connecting the warning strobe light TEMP and %RH Receptacle for connecting the temp and humidity sensor (optional accessory) INDUCTOR Receptacle for connecting the test set to an optional Resonating Inductor (Cat. No. 670600- 1) for extended capacitance range.

  • Page 26: High Voltage Unit Connector Panel

    High Voltage Unit Connector Panel Figure 2: Connector panel – HV Unit HV CONTROL Receptacle for the control cable between the control and HV units HV POWER Receptacle for the power cable between 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...

  • Page 27: Delta4310A Top Panel Features

    3. 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 –...
  • Page 28 AVTMDELTA4000-EN Rev 6 April 2018...

  • Page 29: Setup And Operation

    Setup and Operation Safety Precautions Warning The output of this test set can be lethal. As with any high-voltage equipment, caution must be used at all times and all safety procedures followed. Read and understand Section 2, Safety, before proceeding. Be sure that the test specimen is de-energized and grounded before making connections.

  • Page 30: Setup

    Setup The following steps are a general guide for setting up the test set. Figure 4 shows a typical setup for testing inter-winding and ground capacitance on a three-phase delta-wye power transformer; Figure 5 shows a typical setup for making excitation current measurements on the same transformer.
  • Page 31 Setup and Operation DELTA4000 HIGH VOLTAGE UNIT DELTA4000 TEST SET CONTROL UNIT Figure 4 Typical Test Setup for AC Insulation Testing of a Three-Phase Two-Winding Power Transformer AVTMDELTA4000-EN Rev 6 April 2018...
  • Page 32 DELTA4000 DELTA4000 CONTROL UNIT HIGH VOLTAGE UNIT Figure 5: Typical Test Setup for Transformer Excitation Current Measurements 1. Locate the test set at least 6 ft (1.8 m) from the specimen to be tested. 2. Connect the test ground to a low impedance earth ground on the specimen (if possible).
  • Page 33 If this is not done properly, the high-voltage circuit of the test set will be disabled. The voltage supplied to the DELTA4000 is not critical but should be within the specified voltage range and frequency.
  • Page 34 Depending on which model of DELTA4000 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: Delta Control User Interface

    Delta Control User Interface Introduction The Delta Control software is an intuitive manual user interface where every feature is easy to identify. The buttons look like regular buttons on a mechanical front panel making the user feel as if he is using the instrument in a manual mode.

  • Page 36: Operation

    Operation Test Mode DELTA 4000 offers a quick setting for available test modes. The top line (UST-R in this case) defines and describes the selected test mode. The second and third lines explain how the instrument is configured for the measurement.

  • Page 37: Test Mode Examples

    Delta Control User Interface 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. AVTMDELTA4000-EN Rev 6 April 2018...

  • Page 38: Three Winding Transformer Test

    Three winding transformer test When UST-R is selected for a CHL test, the HV output terminal is to be connected to the 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.

  • Page 39: Frequency And Temperature

    Delta Control User Interface Frequency and Temperature This is where you specify at which test frequency you want to perform the test. This is in most cases the same as the network frequency (but if you would like to test at e.g. 55 Hz you simply enter 55). Note that "Line Frequency" in the setting tab must be set to actual line frequency, 50Hz or 60 Hz.
  • Page 40 (e.g. generators) or in case a voltage dependence is suspected and indicated by high VDF in DELTA4000. The highest voltage level used is set on main page and the voltage per step is set on the settings page Voltage steps...

  • Page 41: Voltage Control

    Delta Control User Interface Voltage Control The voltage control has three sections. The top section is the voltmeter that shows the voltage in real time. Under the voltmeter is a display showing 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.

  • Page 42: Start And Stop

    Start and Stop When you are ready to start measuring, press the Start button. In all modes except the Manual type, the measurement sequence is automatic and the result presented when finished. If you need to stop an ongoing measurement press the Stop button.

  • Page 43: Indicators

    Delta Control User Interface In the results panel you can see the result of the latest measurement. Indicators The indicators show if there are anything that prevents a measurement from starting. If the Interlock Open led is on, you have to close both switches before you can start a test.

  • Page 44: Menu

    Menu In the menu you can access various extra functions. Settings Access the default settings used in the program. Graph Shows graph of performed Auto Tip-Up or Frequency Sweep measurements. Also allows live update of graph as testing is conducted. Show a log of measured values.

  • Page 45: Settings

    Delta Control User Interface Settings The Test Settings dialog allows for user preference and test sequence settings. The user can also reset the software to factory default settings by pressing the Factory Settings button in the lower right corner. General Under the general section you can change the default line frequency.

  • Page 46: Excitation Current

    Excitation Current Here you can select either frequency variation (default) for noise suppression or no suppression where frequency can now be varied from 1 to 500 Hz. Please note that lower frequency results in higher excitation for same voltage, and so it is preferred to maintain frequency variation or no suppression for this test.

  • Page 47: Graph

    Delta Control User Interface 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. The log shows all measured values from the performed tests.
  • Page 48 The clear log button clears all measured values. The Export CSV button makes is possible to export 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.

  • Page 49: Powerdb User Interface

    PowerDB User Interface Introduction PowerDB Lite is included in your purchase of the DELTA4000. PowerDB Lite helps perform testing in an asset based method, and presents results in a professional looking data form. Completed data forms are saved as files to your computer.

  • Page 50: Software Installation (Pc Portion Only)

    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.
  • Page 51 PowerDB User Interface 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. AVTMDELTA4000-EN Rev 6 April 2018...

  • Page 52: Using Delta4000 With Powerdb

    Using DELTA4000 with PowerDB 1. Start the program and select DELTA4000 in the Instrument Setup screen. If you already have tested this object at an earlier occasion, open up this file instead using "Open Existing Results File". PowerDB is designed to save data from several tests on one object in same file.

  • Page 53: Test Form Controls - General

    PowerDB User Interface Test Form Controls - General Once a form is opened, all forms have a set of standard controls which are available across the top of the form as shown below. This allows common functions such as saving, deleting, opening results, together with functions as described below.

  • Page 54: General Options

    General Options Under Tools-Options, default conditions are selected. 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.
  • Page 55 PowerDB User Interface Header can be hidden to allow optimum space for test results within each form. AVTMDELTA4000-EN Rev 6 April 2018...

  • Page 56: Nameplate Header Input

    Nameplate Header Input Nameplate Data: Most information in this section is not critical for testing, except for Oil Temp , KVA(MVA) and Year which are used for temperature correction tables. Remaining information is useful for customer records. Vector Selection: Once form setting (above) selects proper standard, one depresses the vector and a 'pop up' Vector Selector will appear, or 'right click' to select primary and secondary vector until it matches Transformer Nameplate.
  • Page 57 PowerDB User Interface A common method of operation is preparing a test form prior to testing, or Opening past results and performing a new test where past testing has been done. If 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.
  • Page 58 AVTMDELTA4000-EN Rev 6 April 2018...

  • Page 59: Performing Tests Within Forms

    Performing Tests within Forms All DELTA4000 forms have common operational functions, and operational description of each form would be lengthy and have limited value. Most forms are 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...

  • Page 60: Description Of Tests

    Description of Tests Transformer Overall Tests Prior to the overall insulation tests, short all high side (H) bushings together and short all low side (L) bushings together, keeping both windings separated. Remove ground connections from neutral bushings. Test 1 - This is a measurement of the insulation between the transformer high voltage winding and the transformer tank, plus the insulation between the high voltage winding and the low voltage winding, both measured in parallel.

  • Page 61: Overall Test Options

    Performing Tests within Forms NOTE: Once Tests 5, 6 and 7 are completed, Line 8 will populate with values calculated by subtracting Test 6 from Test 5. This is applicable for values of capacitance, current and watts. Line 8 is a calculated comparison to the direct measurements of Test 7.
  • Page 62 Individual Temperature Correction, ITC As a unique feature DELTA4000 also offers ITC, Individual Temperature Correction. With ITC the actual temperature correction for a certain measurement object is estimated by measuring an additional frequency sweep after performing the standard single frequency measurement.

  • Page 63: Bushing C1 Tests

    Performing Tests within Forms factor is pending the test voltage. In this situation a tip-up (step voltage) test should be performed to verify and quantify the voltage dependence. Bushing C1 Tests If the transformer windings are terminated using condenser bushings, then measurements of the C1 insulation on each bushing are generally made.

  • Page 64: Bushing C2 Tests

    Tests 12, 13 and 14 are C1 measurements for the other high side bushings. Test 14 is used only if the high winding has a neutral bushing with a test tap. Make sure to move the Red lead connection from bushing to bushing as necessary. Test mode is UST-R.

  • Page 65: Surge Arresters

    Performing Tests within Forms Surge Arresters If the transformer is equipped with surge or lightning arresters, these may be tested as well. If the arrester is a single-stack unit, its HV connection must be disconnected to eliminate the measurement of losses from other connected apparatus (such as switch and support insulators).

  • Page 66: Bushing Hot Collar Tests

    Bushing Hot Collar Tests Hot collar tests are generally performed on HV bushings that do not have test taps. However, these tests may also be done as an additional test if the bushings have test taps Tests 37 to 46 - These tests measure the outer shell insulation of the bushings, including surface leakage and leakage current from the bushing surface through the insulating material to the center conductor.
  • Page 67 Performing Tests within Forms of the form. You should select the Number of Tests based on how many transformer taps you intend to test. The first test must measure the capacitance of the Standard Capacitor, in pico- Farads (pF). Connect the test set leads, the HV lead and the Red measurement lead, directly to the capacitor.

  • Page 68: Exciting Current Tests

    Exciting Current Tests Measurements of the individual phase excitation current values are valuable in determining defects in the transformer core and coils. Excitation current measurements are generally performed on the high voltage winding only, to minimize the amount of current required. NOTE: All bushing shorting leads must be removed for exciting current measurements.

  • Page 69: Multiple Quick Tests

    Performing Tests within Forms NOTE Exciting current measurements are pending voltage level. Make sure use same voltage level as in earlier measurements on same transformer. Exciting current may also vary due to core magnetization status, exciting current measurements should be performed prior winding resistance measurement or after demagnetization.
  • Page 70 AVTMDELTA4000-EN Rev 6 April 2018...

  • Page 71: Maintenance And Calibration

    The overall accuracy of capacitance and power factor (dissipation factor) at 10 kV should also be checked at least once a year against Megger’s Capacitance and Dissipation Factor Standard (Cat. No. 670500-1). This will ensure that the entire high-voltage circuit is functioning and calibrated properly.

  • Page 72: Troubleshooting

    "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.

  • Page 73: Repair

    Please indicate all pertinent information including problem, symptoms, and attempted repairs. Pack the DELTA4000 in its transit case and include all cables that came with the instrument. Equipment returned for repair must be shipped prepaid and insured and marked for the attention of the Repair Department.
  • Page 74 AVTMDELTA4000-EN Rev 6 April 2018...

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