Megger CDAX 605 User Manual
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Megger CDAX 605 User Manual

Megger CDAX 605 User Manual

Capacitance & dissipation factor test set
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Capacitance & Dissipation
Copyright© 2014 by Megger. All rights reserved.
The contents of this manual are the property of Megger Sweden AB. No part of this work may be reproduced or transmitted in any form
or by any means, except as permitted in written license agreement with Megger Sweden AB. Megger Sweden AB has made every
reasonable attempt to ensure the completeness and accuracy of this document. However, the information contained in this manual is
subject to change without notice, and does not represent a commitment on the part of Megger Sweden AB. Any attached hardware
schematics and technical descriptions, or software listings that disclose source code, are for informational purposes only. Reproduction
in whole or in part to create working hardware or software for other than Megger Sweden AB products is strictly prohibited, except as
permitted by written license agreement with Megger Sweden AB.
TRADEMARK NOTICES
Megger® and Programma® are trademarks registered in the U.S. and other countries. All other brand and product names mentioned in
this document are trademarks or registered trademarks of their respective companies. Megger Sweden AB is certified according to ISO
9001 and 14001.
Megger Sweden AB
Rinkebyvägen 19
182 36 Danderyd
Sweden
User manual
Document ID: AI0003CE
CDAX 605
Factor Test Set
User Manual
Article no: ZP-AI01AE
V01a
phone:
+46 8 510 195 00
email:
seinfo@megger.com
website: www.megger.com
1 / 28
2015-02-16

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Summary of Contents for Megger CDAX 605

  • Page 1 V01a The contents of this manual are the property of Megger Sweden AB. No part of this work may be reproduced or transmitted in any form or by any means, except as permitted in written license agreement with Megger Sweden AB. Megger Sweden AB has made every reasonable attempt to ensure the completeness and accuracy of this document.

  • Page 2: Table Of Contents

    12.1.3 Entering a formula ........................26 Example – Creating a user field showing correction factor ............. 27 12.1.4 12.2 The Results Window ........................27 Megger Sweden AB phone: +46 8 510 195 00 Rinkebyvägen 19 email: seinfo@megger.com 182 36 Danderyd website: www.megger.com...

  • Page 3: Overview

    To achieve maximum accuracy, turn on the unit and allow the unit to adjust to the ambient temperature for at least 30 minutes before first balancing. After balancing, specified accuracy will be achieved. Megger Sweden AB phone: +46 8 510 195 00 Rinkebyvägen 19...
  • Page 4 Operating 0 to 90% non-condensing Absolute calibration and Recommended interval for absolute Calibration manual or automatic calibration is 1 year amplitude balancing Megger Sweden AB phone: +46 8 510 195 00 Rinkebyvägen 19 email: seinfo@megger.com 182 36 Danderyd website: www.megger.com...

  • Page 5: Safety

    WEEE, Waste Electrical and Electronic Equipment. Please utilize your local WEEE collection facilities in the disposition of this product and otherwise observe all applicable requirements. Megger Sweden AB phone: +46 8 510 195 00 Rinkebyvägen 19 email: seinfo@megger.com...

  • Page 6: Warning And Caution Notices

    High-voltage discharges and other sources of strong electric or magnetic fields may interfere with the proper functioning of heart pacemakers. Persons with heart pacemakers should obtain expert Megger Sweden AB phone: +46 8 510 195 00 Rinkebyvägen 19...

  • Page 7: Instrument Safety

     Refer to IEEE 510 - 1983, “IEEE Recommended Practices for Safety in High-Voltage and High-Power Testing,” for information. Megger Sweden AB phone: +46 8 510 195 00 Rinkebyvägen 19 email: seinfo@megger.com...

  • Page 8: Maintenance

    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 9: Control, Indicators And Connectors

    Controlling the CDAX from a PC using USB (USB cable with ferrite choke) Ethernet Controlling the CDAX from a PC or using Ethernet (shielded Ethernet cable) Ethernet communication is recommended due to better protection against high interference. Megger Sweden AB phone: +46 8 510 195 00 Rinkebyvägen 19 email: seinfo@megger.com...

  • Page 10: Back Panel

    A jumper is delivered with the unit between Ground and Guard. Note: If a jumper is connected between ground and guard, it must be removed when performing GST measurements! Megger Sweden AB phone: +46 8 510 195 00 Rinkebyvägen 19 email: seinfo@megger.com...

  • Page 11: Software Installation

    11 / 28 Document ID: AI0003CE 2015-02-16 7 Software Installation To start installing the software, insert the USB memory stick and run the program CDAX 605 install program. Follow instructions on the screen. 8 CDAX605 Control 8.1 Connect Connect the PC to CDAX using the Ethernet cable. When you start the CDAX605 software it will try to connect to a CDAX605 unit.

  • Page 12: Control Tab

    Blue GSTg-B Ground Blue GSTg-RB Ground Red and Blue As an example, activating all channels puts the instrument in GST-GND mode. Megger Sweden AB phone: +46 8 510 195 00 Rinkebyvägen 19 email: seinfo@megger.com 182 36 Danderyd website: www.megger.com Sweden...
  • Page 13 4 gain steps, the proportional constant varies in steps increasing the currents. The oscilloscope time base is automatic To start an individual measurement press “Measure” To manually start a balancing check press “Balancing” Megger Sweden AB phone: +46 8 510 195 00 Rinkebyvägen 19 email: seinfo@megger.com...

  • Page 14: Settings Tab

    Note that accuracy of measurement, and possible temperature dependence, depends very much of type of reference and most accurate results are achieved by use of standard compressed gas capacitor. Megger Sweden AB phone: +46 8 510 195 00 Rinkebyvägen 19...
  • Page 15 ±6 Hz/s of integration. E.g. using 5 s of integration, the bandwidth is ±1.2 Hz. CDAX supports three synchronization modes that are selected by press the “Sync. Mode…- button”. Megger Sweden AB phone: +46 8 510 195 00 Rinkebyvägen 19...

  • Page 16: Calibration

    The calibration for amplitude and phase should be performed at the recommended calibration interval of the system, i.e. every year. Amplitude balancing is performed when asked for or automatically by the instrument at intervals specified by the user. During amplitude balancing the Megger Sweden AB phone: +46 8 510 195 00 Rinkebyvägen 19...

  • Page 17: Calibration

    When measuring power transformers and HV voltage and current transformers, this configuration determines the capacitance and dissipation factor between the various winding groups. In this mode the highest measurement accuracy is reached. Megger Sweden AB phone: +46 8 510 195 00 Rinkebyvägen 19 email: seinfo@megger.com...
  • Page 18 Run CDAX605 Control and connect to the instrument. o In the Settings tab, set the value of the reference capacitor (see figure below) and also configure the test specimen (press red, and/or blue, green). Megger Sweden AB phone: +46 8 510 195 00 Rinkebyvägen 19...
  • Page 19 Check that the continuously updated measurement results are as expected. o Raise voltage to the specified test level. o Press MEASURE. Results will be displayed Megger Sweden AB phone: +46 8 510 195 00 Rinkebyvägen 19 email: seinfo@megger.com...

  • Page 20: Ratio Transformer With Grounded Hv Supply

    Without reconnecting: o Set up the software for ratio measurement, entering the calibrated values for Cn or o Measure the ratio and verify that it is exactly unity with zero phase shift. Megger Sweden AB phone: +46 8 510 195 00 Rinkebyvägen 19...

  • Page 21: Grounded Specimen Test (Gst) With Floating Hv Supply

    This test mode enables the measurement of capacitances that are normally grounded on one side when in operation. When measuring transformers‚ this configuration measures the capacitance and dissipation factor between the HV winding and all other windings and the transformer housing. Megger Sweden AB phone: +46 8 510 195 00 Rinkebyvägen 19...

  • Page 22: Measurements With Test Current Greater Than 5A (With External Current Transformer)

    Ccorr = Cmeas * (1+ ratio error (%)/100) The polarity of the current inaccuracy must be considered. 10.2.2.1.2 Influence of the CT phase accuracy Megger Sweden AB phone: +46 8 510 195 00 Rinkebyvägen 19 email: seinfo@megger.com...

  • Page 23: Stored Data And Reporting

    In order to use user fields, the Results Window checkbox in the settings tab has to be checked. A measurement dialog will then popup each time the user presses the MEASURE button. Megger Sweden AB phone: +46 8 510 195 00 Rinkebyvägen 19...

  • Page 24: Editing User Fields

    12.1.2 User field parameters When selecting a user field, one will be shown a list of its parameters. The following picture shows the parameters of a user field called “Correction factor”: Megger Sweden AB phone: +46 8 510 195 00 Rinkebyvägen 19...
  • Page 25 Minimum number of data points required. The maximum allowed “slope” of the collected data Statistics/Slope Positive numerical value or zero. points. Not valid for single data point measurements. Slope is defined as Megger Sweden AB phone: +46 8 510 195 00 Rinkebyvägen 19 email: seinfo@megger.com 182 36 Danderyd website: www.megger.com...

  • Page 26: Entering A Formula

    It is always equal to loss angle for capacitance measurements, impedance phase angle for resistance measurements and phase shift for ratio measurements. All angles are in radians. Megger Sweden AB phone: +46 8 510 195 00 Rinkebyvägen 19 email: seinfo@megger.com...

  • Page 27: The Results Window

    These are the same parameters as can be referred to using the Statistics/DataCount, Statistics/Slope or Statistics/StandardDeviation parameters of the user field. Megger Sweden AB phone: +46 8 510 195 00 Rinkebyvägen 19...
  • Page 28 If, during a measurement, the statistical requirements upon a user field are not met within the specified Statistics/Timeout period, the user field will become red. It will also not be possible to save the measurement to the log. Megger Sweden AB phone: +46 8 510 195 00 Rinkebyvägen 19...

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