CTA Toolset 4.40

Whats New?

Whats New in the CTA Hardware?

No changes

Whats New in the CTA Software Version 4.40? Overview of new features and changed functionality:

1. Support of additional metering CT classes 2.4 and 4.8 following IEEE standard

2. Additional support of 8 IEC protection CT classes (2P/2PR 6P/6PR) within the Standard Package

3. Testing and assessment with burdens up to 400 VA (IEEE 57.13)

4. Testing and assessment with burdens below 1 VA

5. Additional polarity information for remanence measurements

6. Additional value for TPZ cores

1 Whats New in the CTA Software Version 4.40?

1.1 Support of additional metering CT classes 2.4 and 4.8 following IEEE standard

The new CT Analyzer software version enables testing of the additional metering classes 2.4 and 4.8 according to the IEEE standard C57.13.

The new classes can be selected in the user interface (GUI) on the CT-Object card. Once the standard IEEE C57.13 is selected and the CT type is defined as metering CT, the new classes can be selected from the pre-configured menu.

These metering classes are not defined in the standard IEEE C57.13 itself but required in some cases according to that standard.

1.2 Support of additional different protection classes following IEC Standard

The protection classes 2P/2PR, 3P/3PR, 4P/4PR, 6P/6PR are supported within the Standard Package and Advanced Package in the new CT Analyzer software. The classes can be selected in the pre-configured menu when the standards IEC 60044-1 or IEC 61869-2 are selected.

1.3 Testing and assessment with burdens up to 400 VA following IEEE standard

According to the IEEE standard C57.13 the additional burden B-16.0 with a power of 400 VA can be selected for the test and the assessment of protection CTs. It is also possible to select the secondary terminal voltage to be 1600 V which results in a nominal burden of 400 VA for Isn=5 A. It is following the standard burden designation B-8.0 with a power of 200 VA. The newly supported burden can be selected in the GUI on the CT-Object card once the standard IEEE C57.13 and the type protection CT are selected. It can be found in the pre-configured menu at the designation B-16. The burden of 400 VA is automatically written to the desired field in the CT-Object card. This is independent of the CT class.

1.4 Testing and assessment with burdens below 1 VA

With the new CTA software version it is possible to enable burden values below 1 VA for testing and assessment. This feature can be enabled or disabled in the GUI in the Setting Menu selecting Rated Burden Constraints.

When the new feature is enabled, it is possible to enter a burden value below 1 VA on the CT-Object card. This is independent of the selected standard. The values below 1 VA are also added in the ratio table.

In addition, the new feature enables the assessment (100 % to 25 %) of CTs below 1 VA if for example the value of 25 % of the rated burden is lower than 1 VA.

1.5 Additional polarity information for remanence measurements

The remanence of the CT is calculated and displayed with information about the polarity. It indicates whether the cores have had a positive or a negative remanence. After the measurement, the remanence is displayed on the Res. Magnetism Card in the GUI.

1.6 Additional assessment of the peak value of alternating error component () for TPZ cores

According to the IEC standards 60044-6 and 61869-2 the peak value of the alternating error component for TPZ cores can be assessed with the new software.

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