release note delta4000 101103 - userequip.comuserequip.com/files/specs/6778/release...

Delta 4000 Release Note 1 (12)

2010-11-03

Megger Sweden AB Phone: +46 8 510 195 00

Eldarvagen 4 E-mail: [email protected]

187 75 Täby Website: www.megger.com

Sweden

Release Note - DELTA4000

Content 1 Introduction ..................................................................................................................................................... 2

2 Product versions .............................................................................................................................................. 2

3 Latest news and changes ................................................................................................................................. 2

3.1 Firmware ................................................................................................................................................. 2

3.2 DELTA Control ...................................................................................................................................... 2

4 Installation ....................................................................................................................................................... 3

5 Communication ............................................................................................................................................... 3

6 DELTA4000 and DELTA Control .................................................................................................................. 4

7 PowerDB ......................................................................................................................................................... 7

8 User’s Manuals ............................................................................................................................................... 9

8.1 DELTA User’s Manual ........................................................................................................................... 9

8.2 DELTA Applications and Reference Guide ............................................................................................ 9

8.3 PowerDB Manual .................................................................................................................................... 9

9 Appendix 1 – Slow Ethernet connection ....................................................................................................... 10

9.1 Introduction ........................................................................................................................................... 10

9.2 Verify the Problem ................................................................................................................................ 10

9.3 Fixing the Problem ................................................................................................................................ 11

Revision history

Date Revision Comments

2010-10-22 B03 First release

2010-11-03 B04 FW upgrade (Temp & RH% input), DELTA Control

upgrade (Manual Mode)


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1 Introduction This is a document describing the latest DELTA4000 release. Known issues related to this specific

release are documented in italic. This document also describes different scenarios for DELTA4000

and “inherent/physical” limitations of the test set and measurement methods that need to be

understood.

2 Product versions The deliverables described in this document are;

• Delta4100 Control Unit, version A01/Series 1

• Delta4010 HV Unit, version A01/Series 1

• DeltaUpgrade, internal firmware, FW 2.0.563 (2010-11-03)

• PowerDB for Delta4000, version. Rev 9.2.E

• Delta Control, version 1.0.789

• Installation_SW_Delta4000_2010-10-21

These versions of DELTA software are NOT compatible with previous versions of DELTA4000! Pilot batch P4 can use the new SW package if firmware is upgraded. The following serial numbers are

included: P41-P44

3 Latest news and changes

3.1 Firmware

• Bug fix in DELTA Firmware

o The external Temp & RH% probe input did not work as specified. The internal AMX

code is now modified making it possible for the DELTA Control SW to read ambient

temperature and humidity with optional probe correctly.

o If this feature is not used (the Temp & RH% probe is an optional accessory), the

firmware does not need to be upgraded.

3.2 DELTA Control

• Bug fix in DELTA Control

o Using MEAS in Test Type Manual resulted in erroneous readings. This is now fixed.

o The above bug has not affected any other results, e.g. Power Factor, Excitation Current.


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4 Installation Correct installation is critical. The procedure described in the installation document

“Installation_SW_Delta4000_101103 must be used.

During installation, you can select language for Delta Control, choosing from a variety of languages or

“Same as PowerDB”. If “Same as PowerDB” is selected and you start Delta Control as a separate

application it will start up in English the first time, regardless of choice of language in PowerDB.

Change language in the settings page. Change Delta Control language to any language and it will

remember this language every time you start up the application separately, even if you have select use

PowerDB language run from PowerDB

5 Communication The D4000 with external computer can be controlled via USB communication or Ethernet

communication. Ethernet is normally preferred and an advantage is that the cable used can be

significantly longer (10-50 m) compared with USB (approximately 3 m).

• Ethernet: This is the preferred method of communication; stable, faster and not dependent on

any software driver. However, in a few cases, the protocol is by Windows set to “10 Mbit

half-duplex”, and then the communication is too slow for acceptable operation of

DELTA4000. For more details see Appendix 1 in end of this document.

• USB: This is mainly for calibration and upgrade using MIX, but it can also be used for

measuring with DELTA, even though we recommend Ethernet as it is more reliable in high

interference environments.


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6 DELTA4000 and DELTA Control For power frequency measurements, 50Hz or 60 Hz, Delta 4000 has two suppression modes;

“Frequency Variation” measures slightly below (-3 Hz) and slightly above (+4Hz) power frequency

and calculate the result by interpolating between these two measurements. “Line Freq. Sync.”

measures at 50/60 Hz and synchronizes the output frequency to power inlet frequency and then cancel

out interference by use polarity reversal, i.e. first apply the voltage and then same voltage but 180

degrees out of phase.

For capacitance and power factor/dissipation factor measurements “Frequency Variation” will give

best results due to its superior noise suppression. In case of excitation current measurements, the

frequency dependence is large and non-linear and the “Line Freq. Sync.” method is preferred.

Doble Engineering (October 2010) also recommend these settings for use of their equipment. To our

best knowledge, Omicron CPC TD1 has no functionality for “Line. Freq. Sync.”

• If you run Excitation Current tests the default suppression settings is Line Sync Reversal. In

cases run from a poor power supply, e.g. a portable generator it may happen that the line sync

will not lock and you will get an error message:

o PowerDB: In the DELTA 4000 Measurement Overview pop-up window, change the

Suppression from “Line Freq. Sync.” to “Frequency Variation” or use Delta Control

in the bottom of form and set the suppression mode to “Frequency Variation”

o Delta Control: In the Settings Window; change the Suppression mode to Frequency

Variation

• If run a Frequency Sweep the Delta 4000 measure at actual set frequencies without use of

“Frequency Variation” nor “Line Freq. Sync.” suppression. Do not use any frequency near

(+/- 3Hz) line frequency or any multiple of line frequency. Example of forbidden frequencies:

o 50 Hz: 50, 100, 150, 200, 250, 300, 350, 400, 450 and 500 (and not closer than +-3 Hz,

e.g. 47 is allowed but not 48 Hz)

o 60 Hz: 60, 120 180, 240, 300, 360, 420 and 480 (and not closer than +-3 Hz, e.g. 123 is

allowed but not 122 Hz)

o Examples of allowed frequencies: 470, 320, 160, 80, 32, 16, 8, 4, 2 Hz (frequency range

is 1 Hz – 505 Hz)

o The number of sweep points is limited to 20 points per sweep

• Frequency range for the measurement system is limited to 1 Hz to 505 Hz and limited by

output current and frequencies at higher voltages:

o 12 kV 45 Hz – 200 Hz (data sheet 45-70 Hz)

o 4 kV 15 Hz – 505 Hz (data sheet 15-400 Hz)

o 2 kV 8Hz – 505 Hz

o 1 kV 4Hz – 505 Hz

o 0,5 kV 2Hz – 505 Hz

o 0,25kV 1Hz – 505 Hz (data sheet 1-500 Hz)

• In case of use of Resonant Inductor, the suppression method “line sync reversal” should be

used since the “frequency variation” will place the resonance circuit out of resonance and the

Delta 4000 output current will be too high.


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%VDF is the Voltage Dependence Factor describing the voltage dependence of an insulation system.

If this factor become high on a system where no voltage dependence is expected, e.g. an oil-

impregnated paper bushing or an oil-filled power transformer it is an indication of an insulation

problem. More information can be obtained by perform a tip-up test, i.e. measure the capacitance and

power factor /dissipation factor at several voltage levels.

• %VDF is designed for capacitance and power factor measurements only, and for all

inductance measurements, e.g. a typical excitation current test, no %VDF is reported.

• %VDF shold not be regarded when using “Line. Freq. Sync.” Suppression mode, in in

“Frequency Variation” mode for low voltages, (below 1 kV) and low frequencies ( 15 Hz) The

%VDF has an internally noise level of approximately 0.025-0.035%. The limit for a voltage

dependency is set to 0.05%

• Note that %VDF is NOT a quality/analysis/diagnostic number. It is only used to set a limit

where voltage dependence is suspected!

• The Delta 4000 output protection will limit the peak output current to 25 A equals 454 mA

peak. For a specimen with small voltage dependence, i.e. all power factor / dissipation factor

measurements this means that the limit is set to approximately 320 mA RMS. For specimen

with large voltage dependence, i.e. during excitation current tests, the actual maximum test

current may become lower.

• The inductance calculation is based on a parallel inductance resistor equivalent circuit. This

circuit for inductance calculation is used in the transformer equivalent circuit model and by

e.g. software supplied by Doble Engineering. To our knowledge, parallel inductance model is

not available in Omicron CPC-TD1.

• In PowerDB the measurement integration algorithm is always set to “Auto” but in Delta

Control it is possible to choose manual set of measurement integration time from 3s to 200s.

• It is not possible to measure power factor /dissipation factor continuously in step-up voltage

tests and perform measurement without step down voltage in between measurements. At

line frequency (50 or 60Hz) this is also NOT possible with Delta2000/D3000, Doble M4000

or Omicron CPC.

• You can use the Delta Control, test type “MANUAL” to apply voltage at any

frequency/amplitude and you may change amplitude continuously. Test type “MANUAL” can

be used for balancing a resonant inductor or perform external measurements.

• Delta Control, Test Type “MANUAL” can be used for balancing a resonant inductor. From

PowerDB, in the DELTA 4000 Measurement Overview pop-up window, you can choose a

special designed function for resonant inductor balancing. The “Iout” is a simple

measurement of the output current and this value should be minimized during balancing.

Measurement of Iout gives a lowest level in range of 10 mA. To make sure to get good

balancing, balance at 20% of maximum applied voltage level. Note that suppression mode

Line Freq. Sync. must be used measuring with resonant inductor, otherwise the inductor

will be out of balance. (In PowerDB, you can change suppression mode in the pop-up window

form)


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• A log file is always saved under My Documents/DELTA Measurement Logs. In this file,

with the extension *.txt, the fields are separated with “Tab” and the decimal separator is

comma or point according to regional settings. To import to e.g. Excel, first open Excel and

use open. Then select tabulated text and if the file decimal separator does not fit your regional

settings, change the decimal separator under advanced button in the import dialog.

• When measuring extreme capacitance values, e.g. above 10 µF, the frequency needs to be

lowered to e.g. 10 Hz. (These are values far out of the ordinary range for the applications that

DELTA is designed for)

• When measuring large capacitances, >100 nF, accuracy decreases slightly above

specification

• Capacitance is missing in graphic presentation for both step-test and frequency sweep.

• Negative temperatures cannot be entered in DELTA Control


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7 PowerDB ITC, Intelligent Temperature Correction is supported for two-winding, three-winding, auto without

tertiary and auto with tertiary transformers

In the Overall test form ITC is based on two materials, oil impregnated cellulose and oil. The

algorithm requires frequency range from 450 Hz down to 2 Hz.

The voltage level of delta at 2 Hz is limited to 500 V and therefore the default sweep voltage is set to

500 V (but in no case higher that actual 50/60 Hz test voltage). As an alternative to ITC traditional

table based correction factors can be used. The actual table is selected from setting of certain fields

in the nameplate such as kVA/MVA rating, Tank Type and Coolant.

In the bushing C1 test, the ITC based temperature correction is based on single material insulation.

For temperature corrections from a temperature higher or near 20C only high frequencies are needed,

e.g. 470 320 160 80 32 Hz. For measurements at low temperatures e.g. at 5C, sweep down to 2 Hz is

necessary. Also for bushing C1 test form traditional table based correction factors can be used.

Here the table is selected based on Type/Class in the Bushing Nameplate.

Known issues and FAQ’s:

• The temperature used in overall correction is the entered oil temperature.

• Calculations sometimes need to be updated by e.g. change temperature from e.g. 28C to 29C

(press return) and then back to 28C (press return).

• Today each factor is calculated individually for each test in overall and this is time consuming.

In future releases only one sweep will be used for ITC of the complete transformer ( CHL)

• The temperature used in C1 correction is the average of nameplate ambient temperature and

nameplate oil temperature.

• ITC for transformers is only validated for 5-35 °C


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For many tests, there is a hookup illustration available. The hookup Illustration is opened up from the

DELTA 4000 Measurement Overview window press the Hookup Illustration button. See example

below:

In the 2 and 3-w transformer forms, exciting current test illustration is missing.

• When a DTA (Doble Test Assistant) file is imported, the data is not presented accordingly in

the PowerDB Template.


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8 User’s Manuals

8.1 DELTA User’s Manual

The User’s Manual (hereafter manual) is only available in English at this time, both as a printed paper

based manual as well as the on-line manual in the software. Additional languages in progress:

• German

• Spanish

• French

Future languages may include:

• Russian

• Portuguese

• Italian

• Czech

• Polish

• More…

8.2 DELTA Applications and Reference Guide

This guide will only be available in English and gives useful additional information about the DELTA

applications

8.3 PowerDB Manual

The manual for PowerDB is an on-line help in the software and is not delivered as hard-copy. It is

available in the following languages (same as the SW):

• English

• Spanish

• German

• French


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9 Appendix 1 – Slow Ethernet connection

9.1 Introduction

Ethernet has a built-in handshaking that determines the fastest possible speed between the two

connection points. In rare occasions this may fail and a 10 Mbit/s half-duplex is used. This results in a

very slow connection.

This can be resolved by setting the PC to use a faster connection .This is described in this document.

Note that some of the pop-up screens will differ pending operating system and networking card

manufacturer.

9.2 Verify the Problem

When connected go to Control Panel > Network Connections.

Double click on the connection that is connected to the DELTA unit. If you are unsure, switch the

view to “Details” look at the “Status” column at the same time as you unplug the Ethernet cable. The

status should change from “Connected” to “Network cable unplugged” on the connection you are

looking for. Reconnect the Ethernet cable before you continue.


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Once you have double clicked on your connection, you will see a dialog like this.

9.3 Fixing the Problem

When connected go to Control Panel > Network Connections. Double click on the connection that is

connected to the DELTA unit. This will bring up a dialog like the picture below.

1, Click on “Properties”

2, Click on “Configure”


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(Depending on your network cards manufacturer the dialog below may look different)

Change the link speed to “Full Duplex”.

Click on the “Advanced” tab. Locate where you

can specify the communication speed (in this

case “External PHY”. From the dropdown

select “100mbps Full Duplex” (this may be

different for your network card). Click “OK”

You have now successfully set the network card to use a faster connection speed. This should solve

any slow connection issue when communicating with the DELTA instrument.

.