Page 1 CT Analyzer & CT SB2 User Manual...
Page 2 The user is responsible for every application that makes use of an OMICRON product. OMICRON translates this manual from the source language English into a number of other languages. Any translation of this manual is done for local requirements, and in the event of a dispute between the...
Page 3 CT Analyzer User Manual...
Page 4 CT Analyzer User Manual Manual Version: ENU 1039 05 03 OMICRON...
Page 5: Table Of Contents
Short guide (CT Test mode) ............48 OMICRON...
Page 6 Available soft keys ............90 OMICRON...
Page 7 The CT Analyzer Suite home view ..........167 Technical data OMICRON...
Page 8 Calibrating CT Analyzer ............174 Error and warning messages Support OMICRON...
Page 9: About This Manual
Death or severe injury will occur if the appropriate safety instructions are not observed. WARNING Death or severe injury can occur if the appropriate safety instructions are not observed. CAUTION Minor or moderate injury may occur if the appropriate safety instructions are not observed. NOTICE Equipment damage or loss of data possible. OMICRON...
Page 10: Related Documents
Title Description CT SB2 User Manual Contains information how to use and operate the optional CT SB2 switch box for multi-ratio CT measurement with CT Analyzer as well as safety instructions for working with the CT SB2 switch box. CT Analyzer Suite help Contains detailed information about the CT Analyzer Suite software.
Page 11: Safety Instructions
If you do not understand some safety instructions, contact OMICRON before proceeding. Maintenance and repair of the CT Analyzer test set is only permitted by qualified experts at OMICRON service centers (see "Support" on page 186).
Page 12: Operating The Measurement Setup
In case of any problems or questions, or if you do not understand some safety instructions, contact the OMICRON Technical Support (refer to chapter "Support" on page 186). Before performing tests, observe the following instructions: ►...
Page 13: Power Supply
Opening the CT Analyzer device or its accessories without authorization invalidates all warranty claims. Any kind of maintenance, calibration or repair on the device itself may only be carried out by persons authorized by OMICRON. Disclaimer If the equipment is used in a manner not described in the user documentation, the protection provided by the equipment may be impaired.
Page 14: Recycling
OMICRON test sets are subject to the EU Waste Electrical and Electronic Equipment Directive 2012/19/EU (WEEE directive). As part of our legal obligations under this legislation, OMICRON offers to take back the test set and ensure that it is disposed of by authorized recycling agents.
Page 15: Introduction
CT with the new burden. • Quick wiring checks using the CPOL2 polarity checker from OMICRON. Using the CPOL2 in combination with the specific test signal provided by the CT Analyzer’s Quick Test feature you can check a series of test points (e.g., the burden wiring) for correct polarity.
Page 16: Guessing" Of Parameters
CT Analyzer User Manual If the CT design type is unknown, OMICRON recommends to reconfirm the CT characteristics beforehand and/or to perform an initial calibration between direct and indirect method for the certain CT type. As an example, the so-called factor of construction mentioned in IEC 61869-2 indicates if the CT is of low or high leakage flux.
Page 17: Functional Components Of Ct Analyzer
CT Analyzer to a PC Compact Flash card slot Keyboard with cursor keys and card selection keys SEC, PRIM I/0 key Mains connection unit Measurement inputs with status LEDs Mains socket with fuse and ON/OFF switch Figure 2-1: CT Analyzer overview OMICRON...
Page 18: Mains Connection Unit And Grounding
(4mm socket combined with knurled nut for clamp connection) Figure 2-2: Mains connection unit and grounding terminal 2.3.3 Compact Flash card slot Compact Flash card Storage medium for test data. Eject button Press to eject the Compact Flash card. Figure 2-3: Compact Flash card slot OMICRON...
Page 19: Remote Control Interface (Pc Connection)
CT Analyzer devices as of serial number JHxxxx or newer are equipped with a USB interface and a RS232 interface. You can use both interfaces alternatively to connect the CT Analyzer test set to a computer. OMICRON recommends to use the USB interface since communication via USB is considerably faster than communication via RS232. RS232 interface...
Page 20: Inputs And Outputs
OUTPUT Generator output. AC: 40V , 5A DC: 120V, 5A (15A peak Measurement input for secondary side of CT, 300V max. PRIM Measurement input for primary side of CT, 30V max. Figure 2-5: Inputs and outputs of CT Analyzer OMICRON...
Page 21: I/0 Key With Status Leds
Any other behavior of the status LEDs than described above indicates an error. In this case, switch off CT Analyzer. Do not touch any part of the test setup until the red LED is off and contact the OMICRON Technical Support (refer to chapter "Support" on page 29).
Page 22 Overload indication. CT Analyzer could not output the required test current or take all necessary measurement points due to an overload. Multi-ratio CT measurement. Indicates that a multi-ratio CT test using the optional CT SB2 switch box has been initialized on CT Analyzer (here: full tap combination X1-X4).
Page 23: Keyboard
Use the card selector keys to display a specific card. Use the cursor keys to select an edit field in the user interface or to move the cursor within an edit field. Use the cursor key to enter the edit mode of a displayed card. OMICRON...
Page 24: License-Depending Functional Scope
For up-to-date information about the licenses and packages available for CT Analyzer please refer to the OMICRON website. Scope of delivery, accessories, available licenses For up-to-date information about the scope of delivery and available accessories and licenses for CT Analyzer please refer to the OMICRON website or the OMICRON office nearest you. OMICRON...
Page 25: Setup And Connection
CT or the CT Analyzer test set. ► Always make sure that the CT Analyzer output is connected to the correct side of the current transformer according to the wiring instructions given in sections 3.4 to 3.5 below. OMICRON...
Page 26 Leave the secondary windings of the other (non-measured) cores connected, or short- circuit them if the windings are open. ► If possible, use the optional CT SB2 switch box for testing multi-ratio CTs. CT Analyzer then automatically reduces the test voltage in a way that the maximum possible voltage within the measurement setup (i.e., the voltage occurring at the tap combination with...
Page 27: Setting Up Ct Analyzer
1. Make sure to position the CT Analyzer test set on dry, solid ground. 2. Connect the grounding terminal on the CT Analyzer’s side panel (see section 2.3 on page 15) to protective ground (PE). Use the original cable supplied by OMICRON or alternatively a solid connection of at least 6mm .
Page 28: Connecting Ct Analyzer To A Pc (Optional)
Main Menu -> Settings -> Remote Interface -> RS232 RS232 (crossover) CT Analyzer connected via RS232 interface CT Analyzer settings: to PC Main Menu -> Settings -> Remote Interface -> RS232 RS232 (crossover) Figure 3-1: Connecting CT Analyzer to a PC OMICRON...
Page 29: Connection For Usual Applications
3. Connect the black socket of CT Analyzer input PRIM to the grounded side of the CT’s primary circuit and the red socket of this input to the open (ungrounded) side. OMICRON...
Page 30 PE. Figure 3-2: Basic wiring for a CT test Note: The CT may make humming or buzzing noises of varying frequency during the CT test. This is normal behavior and does not indicate a defective CT. OMICRON...
Page 31: Wiring For A Burden Test
PE. 3. Connect the red OUTPUT socket and the red socket of CT Analyzer input SEC of to the other (ungrounded) side of the burden. Burden Figure 3-3: Basic wiring for a burden test OMICRON...
Page 32: Wiring For Primary Resistance Measurement
The primary winding resistance measurement is performed with DC current. ► Do not open the measurement circuit while current is flowing. ► Stop the measurement by pressing the key on the CT Analyzer test set and wait until the red LED is off before opening the measurement circuit. OMICRON...
Page 33: Connection For Special Applications
As an alternative, a copper foil formed to a ring and placed to the inner side of the core can be used as shown in Figure 3-6. Copper foil Figure 3-6: Using a copper foil formed to a ring as primary wire OMICRON...
Page 34: Excitation Curve Measurement For An Unwound Iron Core
For this purpose, it is necessary to apply an "auxiliary winding" of at least 20 turns to the core. For this purpose, OMICRON offers a special cable with 23 turns (VEHK0658) and a special Microsoft Excel template for the required calculations. Please note that this measurement cannot be performed from the CT Analyzer Suite software.
Page 35 Setup and connection Figure 3-8: Excitation curve measurement using several cascaded "auxiliary winding" cables OMICRON...
Page 36: Measurement On A Gis (Sf6) Switch Gear
6. Connect the primary side of the CT to CT Analyzer input PRIM. Make sure that the polarity is correct (same colors on same polarity). Gas insulated busbar Earthing switch Utility line disconnected Circuit breaker Burden 3m max. Coax measurement cables 100m max. Figure 3-9: Measurement on a GIS (SF6) switch gear OMICRON...
Page 37: Measurement On Bushing-Type Cts
8. If the transformer has a tap changer installed, the position of the tap changer should be changed to a position where the regulation winding is completely bridged in order to ensure that the regulation winding cannot act as a voltage divider together with the main winding of the transformer. OMICRON...
Page 38 CT Analyzer User Manual (Mp) Coax measurement cables Figure 3-10: Measurement on a bushing-type CT Note: Primary terminal H1 must be open. Otherwise the primary side is shorted and CT Analyzer cannot obtain proper results. OMICRON...
Page 39 Short-circuiting the windings on all legs of the transformer is even better. Furthermore, all bushing terminals that are not connected to CT Analyzer should be connected to protective earth in order to prevent influence of external disturbances (see Figure 3-11). Figure 3-11: Measurement on a Y winding transformer OMICRON...
Page 40 For CTs that are integrated in the delta winding of the transformer, it is not possible to read the CT ratio directly since the delta winding acts as a voltage divider. In order to obtain the correct CT ratio, the ratio value determined by CT Analyzer has to be corrected. OMICRON...
Page 41 In the configuration shown in Figure 3-15, no delta compensation is required since the main winding of the power transformer is short-circuited on the other side. This avoids the induction of flux in the main winding of the power transformer that could influence the measurement results. OMICRON...
Page 42 CT Analyzer User Manual Figure 3-15: Measurement setup for delta compensation "Ratio 1" OMICRON...
Page 43: Vt Ratio Measurement Using Quick Test
VT. Connecting the CT Analyzer output to the secondary side of the VT by mistake will cause hazardous voltages on the primary side. ► For VT ratio measurements using Quick Test, always make sure to connect the CT Analyzer output to the primary side of the VT. OMICRON...
Page 44: Winding Resistance Measurement Using Quick Test
► Wait until the inductance has discharged completely before touching any connections or disconnecting the measurement leads of CT Analyzer. NOTICE Equipment damage possible Too high currents could destroy the winding. ► Use only low currents of e.g. 100 mA when measuring the primary side of VTs. OMICRON...
Page 45: Polarity Check Using Quick Test And The Cpol2 Polarity Checker
Polarity Check measurement type. The higher the resistance of the wiring checked (i.e., the burden wiring) or the current amplitude set on CT Analyzer, the higher the terminal voltage generated by this current! OMICRON...
Page 46: Disconnection
► Always wait until the red LED is off before disconnecting measurement leads. Proceed as follows to disconnect CT Analyzer: 1. Wait until the red LED on CT Analyzer is off. 2. Disconnect the measurement leads starting at CT Analyzer. OMICRON...
Page 47: Improving The Quality Of Measurement Results
One clamp is used for each measurement Two measurement leads use one single lead! Correct! clamp! Do not use! Figure 3-19: Demonstration of 2-wire and 4-wire connection technique OMICRON...
Page 48: Noise Reduction Techniques
► If possible, disconnect both primary terminals of the CT from the utility lines. ► If possible, always use the original coax measurement cables delivered by OMICRON. If it is necessary to use loose single-wire measurement cables, twist the wires to a twisted-pair line. Avoid open loops consisting of individual single-wire measurement cables in order to prevent interference voltages caused by magnetic fields.
Page 49: Ct Testing In Ct Test Mode ("New Ct Test")
► Make sure that no other windings of the CT are open. ► If possible, use the optional CT SB2 switch box for testing multi-ratio CTs. CT Analyzer then automatically reduces the test voltage in a way that the maximum possible voltage within the measurement setup (i.e., the voltage occurring at the tap combination with...
Page 50: Short Guide (Ct Test Mode)
Automatic test execution Test finished message -> 4.2.2, step 7. on page 50 View the results -> 4.2.3 on page 51 Disconnect or perform new test -> 4.2.4 on page 51 Figure 4-1: Short guide for testing in CT Test mode OMICRON...
Page 51: Running A Test (Ct Test Mode)
Figure 4-2: Displaying the wiring diagram (CT Test mode) 3. Enter the name plate data of the CT to the CT-Object card (see Figure 4-3). Refer to the table below. Figure 4-3: CT-Object card with name plate data entered OMICRON...
Page 52 When the test is over, the red LED stops flashing and the green LED is on. CT Analyzer displays a "Test finished" message showing the status of the test execution (see Figure 4-5). Press any key on the keyboard to close this message. Figure 4-5: Test finished message when the test is over OMICRON...
Page 53: After The Test Is Finished
► Do not disconnect measurement leads while the red LED on CT Analyzer is flashing. ► Always wait until the red LED is off before disconnecting measurement leads. 1. Wait until the red LED on CT Analyzer is off. 2. Disconnect the measurement leads starting at CT Analyzer. OMICRON...
Page 54: Ct Testing In Advanced Ct Test Mode ("New Advanced Ct Test")
► Make sure that no other windings of the CT are open. ► If possible, use the optional CT SB2 switch box for testing multi-ratio CTs. CT Analyzer then automatically reduces the test voltage in a way that the maximum possible voltage within the measurement setup (i.e., the voltage occurring at the tap combination with...
Page 55: Short Guide (Advanced Ct Test Mode)
Burden test card enabled? Select test current for burden test -> 5.2.2, step 4. on page 57 Start test -> 5.2.3, step 1. on page 57 see next page Figure 5-1: Short guide for testing in Advanced CT Test mode (1) OMICRON...
Page 56 Test finished message -> 5.2.3, step 11. on page 59 View results Disconnect or perform new test -> 5.2.4 on page 60 -> 5.2.5 on page 61 Figure 5-2: Short guide for testing in Advanced CT Test mode (2) OMICRON...
Page 57: Running A Test (Advanced Ct Test Mode)
When finished, press the Back soft key to return to the CT-Object card. 3. Enter the CT data listed in the tables below to the CT-Object card (see Figure 5-4). Figure 5-4: CT-Object card with name plate data entered OMICRON...
Page 58 "Ratio 2/3": If input PRIM is connected to the two terminals of that transformer winding, the CT is in series with. "Ratio 1/3": If input PRIM is connected to the terminals of a transformer winding, the CT is not in series with. OMICRON...
Page 59: Running The Automatic Test And Connecting Ct Analyzer
Cancel Test to abort the complete test. Note: If the "Continuous burden measurement" option is enabled in the Settings (see section 6.8.3 on page 71), the burden test has to be stopped manually by pressing the key. OMICRON...
Page 60 Note: If you do not want to execute the CT test, press the Skip Test soft key instead of changing the wiring. This will skip the CT test and immediately perform the demagnetization cycle to finish the test. OMICRON...
Page 61 Note: The test results and settings of each test started on CT Analyzer and finished with the "Test ok" status are automatically stored to the file OMICRON\AutoSave\CTAnalyzer.xml on the Compact Flash card. The existing CTAnalyzer.xml file is overwritten with each successful test. Tests that could not be finished successfully or that were aborted by the user are not stored and thus do not overwrite the existing CTAnalyzer.xml file.
Page 62: After The Test Is Finished
If desired, you can view the individual measurement results acquired during the test by viewing the Burden, Resistance, Excitation and Ratio cards, as shown in the following figures 5-13 to 5-16. Figure 5-13: Burden card with measurement results after the test is finished OMICRON...
Page 63: Disconnection
► Do not disconnect measurement leads while the red LED on CT Analyzer is flashing. ► Always wait until the red LED is off before disconnecting measurement leads. 1. Wait until the red LED on CT Analyzer is off. 2. Disconnect the measurement leads starting at CT Analyzer. OMICRON...
Page 64: Operating And Configuring Ct Analyzer
Then you can switch the set of displayed soft keys using the located below the soft keys (see Figure 6-2). 1st set of soft keys 2nd set of soft keys Press Figure 6-2: Switching the set of soft keys in the CT-Object card OMICRON...
Page 65: Editing A Card
The items in the list can be selected using the cursor keys. When an item Press the Main soft key in is selected (highlighted), the soft keys are labeled with the functions available for any test card this specific item. -> Main Menu Figure 6-4: Main Menu page OMICRON...
Page 66: New Ct-Test
This option is only available if you have purchased a corresponding license. For Main Menu: more detailed information about multi-ratio CT testing using the CT SB2 switch - New MR-Test box, please refer to the CT SB2 User Manual.
Page 67: New Advanced Mr-Test
New Advanced MR-Test Using the "New Advanced MR-Test" option in the main menu you can initialize a How to get there: new advanced multi-ratio CT test using the optional CT SB2 switch box. Press the Main soft key in any test card This option is only available if you have purchased a corresponding license.
Page 68: Settings
→ Advanced CT Test mode, see chapter 8 on page 89. → Quick Test measurement function, see chapter 10 on page 142 → Multi-ratio testing with CT SB2 switch box, see CT SB2 User Manual. Default Test Card Select the test cards a new Advanced CT test should contain by default.
Page 69 K (transient dimensioning factor): acc. to IEC 60044-6: K is calculated exactly according to the standard. acc. to OMICRON: K calculation considers the CT remanence. acc. to GB 16847: K is calculated acc. to the Chinese standard GB16847.
Page 70 CT Analyzer test set (Save as -> Send to CT Analyzer). CT Analyzer Suite by default stores such customized assessment rules (*.car files) to the OMICRON/CAR folder on the Compact Flash card of CT Analyzer.
Page 71 These settings are only relevant for the Advanced CT Test mode. Please refer to section 6.8.3 on page 71 for more information. 1. Only available for CT Analyzer devices that are equipped with a USB interface (serial number JHxxxx or newer). OMICRON...
Page 72: Default Test Card Selection
Assessment requires Comment requires Figure 6-9: Dependencies of test cards Press the Back soft key to save your selection and to return to the setting menu. Press the key to return to the setting menu without saving the selection. OMICRON...
Page 73: Miscellaneous Settings
CT Analyzer normally stops the burden test automatically as soon as it measurement obtains stable measurement values for the connected burden. If this option is enabled, the burden measurement is not stopped automatically but instead performed continuously until the user stops it manually by pressing the key. OMICRON...
Page 74 "1A: Prot. CT, if V-kn >" Possible values: 50 to 300V. Default: 100V. • "5A: Prot. CT, if V-kn >" Possible values: 15 to 60V. Default: 20V. The Reset Values soft key resets all values to their default values. OMICRON...
Page 75: Tools (Update Functions)
Compact Flash card. Using the New License soft key you can add new licenses manually. For information on how to receive new licenses or a new license key for additional functions, please contact your local OMICRON distributor or the OMICRON support. OMICRON...
Page 76: Update Text
► Only install language files that are included in the package of the installed firmware version. Refer to the OMICRON website for available languages or ask your distributor for a special language file. If the text update process is interrupted or fails, the device displays an error message and automatically resets the user interface to English when it is switched on the next time.
Page 77: Update Firmware
Figure 6-13: File system card for selecting a new firmware file To perform a firmware update, a corresponding firmware file CTAnalyzer.bin has to be available in the A:\OMICRON\ directory on the Compact Flash card. To update the firmware, select the desired firmware file CTAnalyzer.bin using the cursor keys and press the Update Firmw.
Page 78: File Handling
Formatting the Compact Flash card. All data on the Compact Flash card will be lost! Note: In the CT Analyzer file system, the root directory can contain a maximum of 240 files and the file name length (incl. the path) is limited to 240 characters. OMICRON...
Page 79: Working In The File System
Figure 6-16: File system card after creating a new folder Note: In the CT Analyzer file system, a directory can contain a maximum of 240 files and the maximum file name length is 240 characters. Renaming of folders is not supported by CT Analyzer. OMICRON...
Page 80 Note: The test results and settings of each test started on CT Analyzer and finished with the "Test ok" status are automatically stored to the file OMICRON\AutoSave\CTAnalyzer.xml on the Compact Flash card. The existing CTAnalyzer.xml file is overwritten with each successful test. Tests that could not be finished successfully or that were aborted by the user are not stored and thus do not overwrite the existing CTAnalyzer.xml file.
Page 81: Ct Analyzer Help System
Operating CT Analyzer from a computer It is also possible to operate CT Analyzer remote controlled from a computer using the CT Analyzer Suite software. For more detailed information, please refer to chapter 11 on page 167 and the CT Analyzer Suite help. OMICRON...
Page 82: Test Cards For Ct Test Mode
This card contains the CT data. Refer to page 81. Test Results This card displays the results of the CT test. Refer to page 84. Comment In this card you can enter any text, e.g. additional notes regarding the test. Refer to page 88. OMICRON...
Page 83: Ct-Object Card
These fields provide information about the location of the CT and the CT itself. The content of these fields is defined in the Location settings page and the Object settings page, respectively. OMICRON...
Page 84: Parameters And Settings Used
Note: Parameters marked by a star "*" in the CT Analyzer user interface are mandatory parameters. Test execution is not possible if no data are specified for such parameters. All other parameters can be assigned with default values defined in the default test settings and have to be adapted accordingly. OMICRON...
Page 85 Possible values: Soft keys Prot. CT, Meter. CT or ?. Default: As defined in the default test settings. Class Accuracy class of the CT. Possible values: Depending on the selected standard. Default: As defined in the default test settings. OMICRON...
Page 86: Test Results Card
CTs to allow the display of the composite error for different multiples of the nominal secondary current I ε @Ipn*F Use the "F" parameter to specify the factor (for example, 1 x, 5 x, or 10 x I and read the resulting composite error from the "ε @Ipn*F" field. OMICRON...
Page 87: Secondary Winding Resistance Measurement Details
Reference temperature, i.e, temperature the CT is specified for. Value used: Reference temperature defined in the Settings (main menu). The winding resistance at reference temperature is calculated from the winding resistance measured at ambient temperature (T ) and the specified reference meas temperature. OMICRON...
Page 88: Excitation Graph
Switches off the display of values on the bottom right of the diagram. If you have switched off the values, this soft key changes to Text On to switch the values display on again. Closes the excitation graph and brings you back to the Excitation card. OMICRON...
Page 89 (e.g. "V-meas" and "L-meas" if you have entered a current "I-meas"). Figure 7-7: Entering a current value to display its corresponding voltage and inductance values on the excitation graph OMICRON...
Page 90: Comment Card
CT Analyzer User Manual Comment card Use the Comment card of the CT Test mode to enter additional notes regarding your test. Press to open the main menu Figure 7-8: Comment card OMICRON...
Page 91: Test Cards For Advanced Ct Test Mode
CT Analyzer. The set of test cards actually available on your CT Analyzer depends on your purchased license(s). Note: For up-to-date information about available licenses for CT Analyzer please refer to the OMICRON website or contact your OMICRON sales contact.
Page 92: Ct-Object Card
Note: When loading a new CT test from the main menu (using the "New Advanced CT Test" entry), the test card selection defined in the default test settings is used for this new test. The card selection performed in the CT-Object card will then be discarded. OMICRON...
Page 93: Information Fields To Be Filled By The User
Type: Type number or description of the CT under test. • Serial No.: Serial number of the CT under test. • Core: Number of the tested core. • Tap: Description of the tap (e.g. 1S1-1S3, X1-X4, ...). • Optional 1: Optional field for free use. OMICRON...
Page 94: Parameters And Settings Used Or Determined By The Test Process
Settings -> Select Customized Assessment (see page 68)), an additional Custom soft key is available to allow selection of this customized assessment rule. Default: Standard defined in the default test settings. Note: Using the IEEE C57.13 standard for transformers with gapped cores may possibly deliver incorrect results. OMICRON...
Page 95 When Assess @ VA is selected, the soft key changes to Assess all VA to enable deactivation of this option. Refer to section "Specific parameters and settings displayed for IEEE C57.13 metering CTs" on page 106 for information on the "Burden designation" field and detailed instructions how to use the Assess @ VA option. OMICRON...
Page 96 Possible values: 0.25 to 1.00 or soft key 1.0. Default: As defined in the default test settings (Main menu -> Settings -> Misc. Settings). OMICRON...
Page 97 Default: As defined in the default test settings (Main menu -> Settings -> Misc. Settings). 1. If the question mark is entered for this parameter and a new test is started, CT Analyzer automatically tries to determine the value using its integrated guesser function (see chapter 9 on page 138). OMICRON...
Page 98 2. If the question mark is entered, half the voltage entered or measured for E is used. 3. If the question mark is entered, CT Analyzer uses the excitation current measured at the voltage value defined at E . In this case, the assessment for this parameter is OK. OMICRON...
Page 99 Possible values: Soft keys On or Off. Default: On. 1. If the question mark is entered for this parameter and a new test is started, CT Analyzer automatically tries to determine the value using its integrated guesser function (see chapter 9 on page 138). OMICRON...
Page 100 Possible values: 1.0 to 2043 or soft key ? Default: ?. Specified secondary time constant. Possible values: 0.000 to 100.0s or soft key ? Default: ?. Duty Specified duty cycle. Using the soft keys, two different energizing cycles can be selected: C-O or C-O-C-O Default: C-O. OMICRON...
Page 101 Select a calculation method using the soft keys: acc. to IEC 60044-6 (calculation exactly acc. to standard), acc. to OMICRON (calculation considers CT remanence) or acc. to GB 16847 (acc. to Chinese standard GB 16847). Default: As defined in the default test settings (see "Default Standard"...
Page 102 Possible values: 0.1 to 40000V or soft key ? Default: ?. Accuracy limiting current acc. to IEC 61869-2. Possible values: 0.03mA to 30000mA or soft key ? Default: ?. Maximum allowed excitation current at E Possible values: 0.03mA to 30000mA or soft key Default: ?. OMICRON...
Page 103 The setting of this parameter displays or hides the parameters K , and T , Duty and t (see parameter descriptions below). Possible values: Soft keys by Duty or by Ktd. Default: As defined in the default test settings. OMICRON...
Page 104 Possible values: 0.000 to 5.000s and max. t soft key 40ms. Default: ? or ?*. * If displayed, this parameter is relevant for assessment. No automatic assessment is available if the user did not enter data for this parameter prior to the test. OMICRON...
Page 105 2. If the question mark is entered, half the voltage entered or measured for E is used. 3. If the question mark is entered, CT Analyzer uses the excitation current measured at the voltage value defined at E . In this case, the assessment for this parameter is OK. OMICRON...
Page 106 Possible values: Soft keys On or Off. Default: On. 1. If the question mark is entered for this parameter and a new test is started, CT Analyzer automatically tries to determine the value using its integrated guesser function (see chapter 9 on page 138). OMICRON...
Page 107 1. Acc. to IEEE C57.13 (2008) 2. If the question mark is entered for this parameter and a new test is started, CT Analyzer automatically tries to determine the value using its integrated guesser function (see chapter 9 on page 138). OMICRON...
Page 108 ► The "Burden designation" field displays the standard burden or the burden range selected for assessment (for example, B-0.9 - B1.8). The ratio table and the phase table in the Ratio card will now only show the error for this specific burden or burden range. OMICRON...
Page 109: Burden Card
1A (value of I-test) It is possible to overwrite the default test current using the keyboard (0.1 to 5A). Always verify the test current settings prior to starting the test in order to avoid damaging of the CT or other equipment. OMICRON...
Page 110: Test Results
► Residual magnetism measurement, see section 8.4.2 on page 110. ► Primary resistance measurement, see section 5.2.3, steps 4. & 5. on page 58. ► CT test, see section 5.2.3, steps 7. to 11. on page 59, and sections 5.2.4 on page 60 and 5.2.5 on page 61. OMICRON...
Page 111: Residual Magnetism Card
Residual Magnetism card Note: Residual magnetism is an optional feature. The functionality described below is only available if you have purchased a corresponding license. For further information, please contact your OMICRON sales contact or the OMICRON office nearest you. The Residual Magnetism card of the Advanced CT Test mode is only available if it is enabled on the Select Cards page (Default Test Card Selection or Select Cards soft key in the CT-Object card).
Page 112: Test Settings And Results
Residual Magnetism test card in the Select Cards page. Press the Back soft key to apply your test card selection and return to the CT-Object card. Figure 8-7: Select Cards page with Residual Magnetism test card enabled 2. If not already specified, enter the I of the CT on the CT-Object card. OMICRON...
Page 113 5.2.3, steps 4. & 5. on page 58. 10. After the primary resistance measurement is finished, the test halts to allow rewiring for the CT test. Connect CT Analyzer and run the CT test as described in section 5.2.3, steps 6. to 11. on page 59. OMICRON...
Page 114: Resistance Card
Press to open the main menu Figure 8-9: Resistance card showing parameters and results for primary and secondary winding resistance measurement Figure 8-10: Resistance card for secondary winding resistance measurement only (left) and for primary winding resistance measurement only (right) OMICRON...
Page 115: Primary Winding Resistance Measurement
This measurement is performed completely automatically. Note: If only the secondary winding resistance test is selected, a demagnetizing cycle is performed after the test to guarantee complete demagnetization of the CT. OMICRON...
Page 116: Test Settings And Results
0.2 A, I is automatically set to 0.2 A. Maximum value: 5 A. Primary winding resistance measurement only: Maximum value: 10 A. V-DC Measured voltage. R-meas Measured resistance at ambient temperature. R-ref Reference resistance (temperature-compensated resistance, compensated to T OMICRON...
Page 117: Excitation Card
If CT Analyzer displays an overload in the Excitation card, either the desired knee point could not be reached or not all necessary measurement points could be taken (e.g. in the knee point area, not enough points for a proper calculation of the knee point could be measured). OMICRON...
Page 118: Available Soft Keys
(Results with Nom. Burden) or calculated with the operating burden (Results with Op. Burden). The displayed pages are identical to a large extend, except the labeling of the burden parameter field ("VA" in case of nominal burden and "Burden" in case of operating burden) and the result values. OMICRON...
Page 119 User-defined e.m.f. to verify the excitation current at this e.m.f. Max. allowed excitation current at E 1. If CT Analyzer is not able to measure up to the actual value, the prefix ">" is displayed to indicate that the measurement value is larger than the displayed value. OMICRON...
Page 120 Peak instantaneous alternating current component error according ε ac to the standard. 1. If CT Analyzer is not able to measure up to the actual value, the prefix ">" is displayed to indicate that the measurement value is larger than the displayed value. OMICRON...
Page 121 Accuracy limiting current according to IEC 61869-2 (at Ek). User-defined e.m.f. to verify the excitation current at this e.m.f. Max. allowed excitation current at E Kssc Rated symmetrical short-circuit current factor at accuracy 1, 2 limit with the selected load. Theoretical transient dimensioning factor. OMICRON...
Page 122 1. For IEEE C57.13 classes C, T and K. 2. For IEEE C57.13 class X only. 3. If CT Analyzer is not able to measure up to the actual value, the prefix ">" is displayed to indicate that the measurement value is larger than the displayed value. OMICRON...
Page 123: Excitation Graph
Moves the cursor downwards on the excitation graph. Switches off the display of values on the bottom right of the diagram. If you have switched off the values, this soft key changes to Text On to switch the values display on again. OMICRON...
Page 124 IEEE C57.13 (30°) to enable the display of the knee point for the 30° tangent. 30° is recommended for gapped cores in IEEE C37.110, chapter 4.3. Note: The test report only contains the graph for the standard selected in the CT-Object card. OMICRON...
Page 125 (e.g. "V-meas" and "L-meas" if you have entered a current "I-meas"). Figure 8-14: Entering a current value to display its corresponding voltage and inductance values on the excitation graph OMICRON...
Page 126: Accuracy Limiting Error Graph
► Select the desired edit field "K-Value" or "Burden" using the cursor keys and enter the desired value using the keyboard. ► Press the key to apply the entered value and read the corresponding value in the respective field. OMICRON...
Page 127: Ratio Card
Ratio card. Note: Although the test is not performed with the real current, the test results reflect the current ratio and not the voltage ratio. Press to open the main menu Figure 8-16: Ratio card OMICRON...
Page 128: Available Soft Keys
Changing this value only influences the results displayed in the Ratio card (operating burden related values). It does not affect the values displayed in the separate pages for the ratio and phase tables (values related to nominal burden). Default: Value of I OMICRON...
Page 129: Test Results
This parameter is only displayed if the IEEE C57.13 standard is selected in the CT-Object card. RE@(20*Isn) Ratio error at 20 * I This parameter is only displayed if the IEEE C57.13 standard with class C, T or X is selected in the CT-Object card. OMICRON...
Page 130: Ratio Table And Phase Table For Iec 60044-1, Iec 60044-6 And Iec 61869-2
3.75VA instead of 1VA. Please note that this only applies if the results are displayed with the nominal burden. It has no effect if the results in the ratio table and the phase table are displayed with the operating burden. OMICRON...
Page 131: Ratio Table And Phase Table For Ieee C57.13
Values without the prefix "!" have guaranteed accuracy. The accuracy of values marked with a "!" in the tables is reduced by factor 2. Figure 8-18: Displaying the ratio table and the phase table in the Ratio card (for IEEE C57.13) OMICRON...
Page 132: Assessment Card
CT should have according to the nameplate. In other words: If a parameter is guessed by CT Analyzer, the automatic CT assessment is partly based on its actual values instead of its rated values and therefore possibly incorrect. OMICRON...
Page 133: Assessment Details
Parameters assessed for IEC 60044-1 Table 8-28: Parameters assessed for IEC 60044-1 protection CTs Param. Description Parameter assessed for IEC 60044-1 protection CTs standard classes OMICRON extension 5P 10P 5PR 10PR PX 2P, 3P, 2PR, 3PR, 4P, 6P 4PR, 6PR Class Accuracy class according to standard.
Page 134 Table 8-28: Parameters assessed for IEC 60044-1 protection CTs (continued) Param. Description Parameter assessed for IEC 60044-1 protection CTs standard classes OMICRON extension 5P 10P 5PR 10PR PX 2P, 3P, 2PR, 3PR, 4P, 6P 4PR, 6PR Dimensioning factor (according to IEC 60044-1 class PX).
Page 135 (K K * Kssc Dimensioning factor (K) multiplied by the rated symmetrical short-circuit current factor (K V-al Rated equivalent excitation limiting secondary voltage. I-al Accuracy limiting secondary excitation current. Secondary winding resistance. Rprim Primary winding resistance. OMICRON...
Page 136 Parameters assessed for IEC 61869-2 Table 8-31: Parameters assessed for IEC 61869-2 protection CTs Param. Description Parameter assessed for IEC 61869-2 protection CTs standard classes OMICRON extension 5P 10P 5PR 10PR PX PXR 2P, 3P, 2PR, 3PR, 4P, 6P 4PR, 6PR Class Accuracy class according to standard.
Page 137 Description Parameter assessed for IEC 61869-2 metering CTs 0.1, 0.2, 0.2s, 3, 5 0.5, 0.5s, 1 Class Accuracy class according to standard. Δϕ Phase deviation. ε Current ratio error. Instrument security factor (indirect meas. method). Rprim Primary winding resistance. OMICRON...
Page 138 Current ratio error at 20 times the secondary 20 * Isn current I Vknee Knee point voltage. Vk / Ik User-defined measuring point. Vk1 / Ik1 User-defined measuring point 1. Secondary winding resistance. Rprim Primary winding resistance 1. Acc. to IEEE C57.13 (2008) OMICRON...
Page 139: Comment Card
The Comment card of the Advanced CT Test mode is only available if it is enabled in the Select Cards page (Default Test Card Selection or Select Cards soft key in the CT-Object card). Use the Comment card to enter additional notes regarding your test. Press to open the main menu Figure 8-20: Comment card OMICRON...
Page 140: Using The Guesser Function
► Make sure that no other windings of the CT are open. ► If possible, use the optional CT SB2 switch box for testing multi-ratio CTs. CT Analyzer then automatically reduces the test voltage in a way that the maximum possible voltage within the measurement setup (i.e., the voltage occurring at the tap combination with...
Page 141: About The Guesser Function
2. Connect the CT to CT Analyzer as described in chapter 3. ► Refer to section 3.4.1 on page 27 for detailed information on how to connect CT Analyzer for the CT test. ► Be sure that the polarity of all wires is correct. OMICRON...
Page 142: Preparing And Configuring The Test
Figure 9-2: "No assessment" warning displayed if you did not enter data for a parameter relevant for assessment Press Cont. Test to continue testing without an automatic assessment. Or press Cancel Test and enter data for all parameters marked with a star "*" in the CT-Object card and start the test again. OMICRON...
Page 143: After The Test Is Finished
► Do not disconnect measurement leads while the red LED on CT Analyzer is flashing. ► Always wait until the red LED is off before disconnecting measurement leads. 1. Wait until the red LED on CT Analyzer is off. 2. Disconnect the measurement leads starting at CT Analyzer. OMICRON...
Page 144: Using The Quick Test Feature
For further information, please contact your OMICRON sales contact or the OMICRON office nearest you. The Quick Test feature cannot be used when a CT SB2 switch box is connected to the remote control interface of CT Analyzer.
Page 145: Safety Notes And Notes For Using Quick Test
When performing measurements on CTs using Quick Test, consider that CT Analyzer does not perform automatic demagnetization of the CT. ► If necessary, run a normal CT test with its automatic demagnetizing cycle following Quick Test measurements for a CT. OMICRON...
Page 146: Introduction To Quick Test
CT with the new burden. • Quick wiring checks using the CPOL2 polarity checker from OMICRON. Using the CPOL2 in combination with the specific test signal provided by the Quick Test feature of CT Analyzer you can check a series of test points (e.g., the connecting terminals of the burden wiring) for correct polarity.
Page 147: Performing Measurements With Quick Test
2. Select the measurement type and connect your test object to CT Analyzer correspondingly (see sections 10.4 to 10.10 below). 3. Define your measurement quantities. 4. Start and stop your measurement by pressing the key. 5. After starting a measurement, the Results card is displayed automatically, showing the measurement results. OMICRON...
Page 148: Advanced Measurement
Feeding an inductance with DC current will charge the inductance. CT Analyzer does not perform automatic discharge of the inductance. ► Wait until the inductance has discharged completely before touching any connections or disconnecting the measurement leads of CT Analyzer. OMICRON...
Page 149 Allows high precision measurement of the fundamental wave of an applied signal. All frequencies below and above the output frequency plus/minus the filter bandwidth are suppressed by at least 110 dB. This measurement mode is deactivated for output signal type DC. See also "B-width" below. OMICRON...
Page 150 0 to 1000H. Ω Default: 1.00 for R and 50.00H for L If these values are not set correctly for the connected CT, the CT will saturate sooner or later, depending on the inaccuracy of the values used. OMICRON...
Page 151 Impedance, calculated from the amplitude and phase angle of the output signal and the voltage measured at input SEC. Rp, Rs Use the Rp/Rs soft key to switch between R and R Parallel or serial resistance, calculated from the output signal and the voltage measured at input SEC. OMICRON...
Page 152 L ) are calculated using the parallel equivalent circuit diagram, the results for R and L ) are calculated using the serial equivalent circuit diagram. Use the following wiring (examples): Figure 10-5: Wiring examples for Advanced measurement type OMICRON...
Page 153: Polarity Check
The CPOL2 polarity checker from OMICRON checks the polarity of the injected signal and provides a clear indication whether the polarity is OK or not.
Page 154 Use the cursor keys to move the cursor to a field and then select the quantity to be displayed in this field using the available soft keys. Please refer to page 149 (Advanced Measurement type) for a detailed description of the available quantities (soft keys). OMICRON...
Page 155 4. Select the Polarity Check measurement type and set the amplitude of the polarity check signal appropriately. 5. Start the polarity check by pressing the key on CT Analyzer. 6. The Results Polarity Check card displays the measured values as long as the measurement is active. OMICRON...
Page 156 CPOL2. In that case, the other LED should light up. 8. Stop the measurement by pressing the key on CT Analyzer again. Note: Please refer to the CPOL2 User Manual for detailed information about the CPOL2 polarity checker. OMICRON...
Page 157: Ct Ratio Measurement
0 to 1000H. Ω Default: 1.00 for R and 50.00H for L If these values are not set correctly for the connected CT, the CT will saturate sooner or later, depending on the inaccuracy of the values used. OMICRON...
Page 158 RMS value and phase of the voltage measured at input PRIM. Current ratio of the CT calculated from the voltages measured at inputs SEC and PRIM. Frequency measured at input SEC. Use the following wiring for CT ratio measurement (example): Figure 10-10: Wiring example for CT ratio measurement OMICRON...
Page 159: Vt Ratio Measurement
This input is considered as the phase reference, therefore the phase is always 0. PRIM RMS value and phase of the voltage measured at input PRIM. Voltage ratio of the VT calculated from the voltages measured at inputs SEC and PRIM. Frequency measured at input SEC. OMICRON...
Page 160 CT Analyzer or clicking the ON button on the VT Ratio tab of the CT Analyzer Quick Test software tool. The measured values are displayed and permanently updated as long as the measurement is active. Refer to Figure 10-14. OMICRON...
Page 161 CT Analyzer again or clicking the OFF button on the VT Ratio tab of the CT Analyzer Quick Test software tool. Live display of measured values Live display of VT ratio Figure 10-14: Results test card for VT ratio measurement OMICRON...
Page 162: Resistance Measurement
This measurement is performed with DC current. Feeding an inductance with DC current will charge the inductance. CT Analyzer does not perform automatic discharge of the inductance. ► Wait until the inductance has discharged completely before touching any connections or disconnecting the measurement leads of CT Analyzer. OMICRON...
Page 163 NOTICE Equipment damage possible Too high currents could destroy the winding. ► Use only low currents of e.g. 100 mA when measuring the primary side of VTs. Measurement settings Figure 10-17: CT-Quick test card with settings for resistance measurement OMICRON...
Page 164 5. Stop the measurement by pressing the key on CT Analyzer again or clicking the OFF button on the Resistance tab of the CT Analyzer Quick Test software tool. Live display of winding resistance Figure 10-18: Results test card for resistance measurement OMICRON...
Page 165: Impedance Measurement
This input is considered as the phase reference, therefore the phase is always 0. PRIM Not used for impedance measurement. Measured impedance, calculated from the magnitude and phase angle of the output signal and the voltage measured at input SEC. ϕ Power factor of the measured impedance. OMICRON...
Page 166 CT Analyzer User Manual Use the following wiring for impedance measurement (example): Figure 10-20: Wiring example for impedance measurement OMICRON...
Page 167: 10.10 Reactance Measurement
Not used for reactance measurement. Serial resistance, calculated from the output signal and the voltage measured at input SEC. Serial reactance, calculated from the magnitude and phase angle of the output signal and the voltage measured at input SEC. OMICRON...
Page 168 CT Analyzer automatically detects whether the test object is an inductance or a capacitance based on the phase angle. Note: The reactance measurement uses the serial equivalent circuit diagram for results calculation. Use the following wiring for reactance measurement (example): Figure 10-22: Wiring example for reactance measurement OMICRON...
Page 169: Ct Analyzer Suite
Press the F1 key on your keyboard or click the help button and select Help to display the help system providing detailed information about CT Analyzer Suite. The figure below shows the CT Analyzer Suite home view. OMICRON...
Page 170 CT Analyzer User Manual Figure 11-1: CT Analyzer Suite home view OMICRON...
Page 171: Technical Data
Output power 400VA max. 12.3 Measurement inputs Table 12-3: Measurement input SEC Characteristic Rating Voltage ranges 0 - 0.3 / 3 / 30 / 300V (auto ranging) Accuracy 0.1% (guaranteed) Insulation Reinforced insulation (R) to all other circuits OMICRON...
Page 172: Winding Resistance Measurement Accuracy
• One terminal of the primary side of the CT is connected to PE. • The original measurement cables delivered by OMICRON for CT Analyzer are used. • The CT under test is a CT with a non-gapped core. •...
Page 173: Compact Flash Card Interface
Remote control interface The remote control interface of CT Analyzer is exclusively intended to connect CT Analyzer to a computer (e.g. running the CT Analyzer Suite software) or to the optional CT SB2 switch box (for multi- ratio CT measurement).
Page 174: Rs232 Interface
CT Analyzer User Manual 12.7.1 RS232 interface The RS232 interface can be used to connect CT Analyzer to a computer or to the optional CT SB2 switch box. 9-pole SUB-D connector, male Figure shows outside view onto the pins at CT Analyzer!
Page 175: Environmental Conditions
IEC/EN 60068-2-6 (frequency range 10 Hz…150 Hz, acceleration 2 g Vibration continuous (20 m/s /65 ft/s ), 20 cycles per axis) IEC/EN 60068-2-78 (5%…95% relative humidity, no condensation), Humidity tested at 40 ºC/104 ºF for 48 hours Protection class IP20 according to EN 60529 OMICRON...
Page 176: User Maintenance
13.3 Calibrating CT Analyzer OMICRON offers a reference CT (calibration CT VEHZ0649) to verify the calibration of CT Analyzer. This reference CT is delivered together with a calibration certificate of a national test laboratory. The calibration CT has a ratio of 2000:1 and 2000:5. Its class is 0.02.
Page 177: Error And Warning Messages
Reason: No valid software in the device Flash memory or incorrect checksum. Solution: Insert a Compact Flash card with valid software (CTAnalyzer.bin) in the Omicron directory and switch the CT Analyzer off and on again. 002.xxx Error [002] Can't open file! Reason: The firmware cannot read the file CTAnalyzer.bin from the Compact Flash card since the...
Page 178 The measured input voltage differs by more than 5V from the input voltage expected during the burden test using the CT SB2 switch box. Solution: Check whether the BURDEN OUT and the BURDEN IN sockets on the CT SB2 are connected correctly. 201.xxx Warning [201.xxx] Check connection.
Page 179 Reason: Input signal at input "Prim" differs from the expected one. Solution: Check whether the PRIM OUT and the PRIM IN sockets on the CT SB2 are connected correctly to the primary side of the CT. 207.xxx Warning [207.xxx] Check connection! OUTPUT may be disconnected.
Page 180 Warning [401.xxx] CT SB2 switch box is disconnected! Reason: The CT SB2 is not properly connected to the CT Analyzer. Solution: Restore proper connection between the CT SB2 and the CT Analyzer and restart your test. 402.xxx Warning [402.xxx] CT SB2 switch box communication error. Reason: Communication between the CT SB2 and the CT Analyzer failed.
Page 181 Warning [408.xxx] Check CT SB2 switch box wiring: <text depending on missing connection actually detected> Reason: At least one of the CT taps enabled for multi-ratio testing is not connected to the CT SB2 correctly. Solution: Make sure that all CT taps are connected correctly to the TAPS terminals on the CT SB2 and restart your test.
Page 182 Delete some files on the Compact Flash card or insert a new CF card. 805.xxx Warning [805.xxx] Flash card access error. No or corrupt flash card. Reason: No or no valid CF card can be found. Solution: Insert a valid Compact Flash card. OMICRON...
Page 183 The .xml file seems to be not a CT Analyzer report. Solution: The report cannot be loaded by the CT Analyzer. 817.xxx Error [817.xxx] The xml file has no valid OMICRON report style. Reason: The .xml file has no valid OMICRON report style. Solution: The report cannot be loaded by the CT Analyzer.
Page 184 Error [824.xxx] An internal software error has occurred at address xxxxxxxH. To log this error, make sure that a CF card is inserted and then press OK. Please send the file \OMICRON\ ErrorLog.xml on the CF card to the next OMICRON service center.
Page 185 Solution: Switch the CT Analyzer off, wait 1 minute and then switch it on again. If this error occurs more frequently, you should contact your next OMICRON service center. 901.xxx Warning [901.xxx] Protective earth (PE) connection in power supply cord missing. Connect PE to equipotential terminal.
Page 186 The message is active as long as the internal power for the measurement interface fails. Contact the next OMICRON service center if the error does not disappear. 911.xxx Error [911.xxx] Power supply error, contact next Omicron service center. Desired voltage xxxx, measured voltage yyyy. Reason: One supply voltage on the measurement interface boards is out of tolerance.
Page 187 Checksum for user language support data invalid. Solution: Copy a user text file (CTUser_xxx.bin) to the directory A:\Omicron\ on the Compact Flash card and try to update the user language support data using the "Update Text" function in the tools menu.
Page 188: Support
OMICRON Academy – learn more www.omicronenergy.com/academy Learn more about your product in one of the training courses offered by the OMICRON Academy. OMICRON electronics GmbH, Oberes Ried 1, 6833 Klaus, Austria, +43 59495 OMICRON...
Page 189 CT SB2 User Manual...
Page 190 CT SB2 User Manual Manual Version: ENU 1112 05 03 OMICRON...
Page 191 General..............15 Connecting the communication link between CT SB2 and CT Analyzer ....17 Basic measurement setup for multi-ratio CT testing .
Page 192 Replacing fuses ............. . . 61 Error and warning messages for CT SB2...
Page 193: About This Manual
About this manual About this manual This CT SB2 User Manual provides information on how to use the CT SB2 switch box. The CT SB2 User Manual contains important safety instructions for working with CT SB2, gets you familiar with operating it, and provides typical application examples.
Page 194: Related Documents
CT SB2 User Manual Related documents The following documents complete the information covered in the CT SB2 User Manual: Title Description CT Analyzer User Manual Contains information on how to use and operate CT Analyzer as well as safety instructions for working with CT Analyzer.
Page 195: Safety Instructions
CT Analyzer User Manual carefully. Do not turn on the CT SB2 switch box and do not operate the device without understanding the safety information in this manual. If you do not understand some safety instructions, contact OMICRON before proceeding.
Page 196: Operating The Measurement Setup
CT SB2 to protective ground (PE). Only use the original cable set supplied by OMICRON. ► Make sure that the terminals of the test object to be connected to CT SB2 do not carry any voltage potential. During a test, CT Analyzer (with CT SB2 connected) is the only permitted power source for the test object.
Page 197: Power Supply
240V AC. Orderly measures The CT SB2 User Manual or alternatively the e-book has always to be available on the site where CT SB2 is being used. The CT SB2 users must read this manual before operating the device and observe the safety instructions and all relevant instructions for connection and operation.
Page 198: Recycling
OMICRON devices are subject to the EU Waste Electrical and Electronic Equipment Directive 2012/19/EU (WEEE directive). As part of our legal obligations under this legislation, OMICRON offers to take back the test set and ensure that it is disposed of by authorized recycling agents.
Page 199: Introduction And Designated Use
CTs but also for testing single-ratio CTs. CT SB2 is intended exclusively for the applications described above. Any other use is deemed not to be according to the regulations. The manufacturer and the distributor are not liable for damage resulting from improper usage.
Page 200: Hardware
A green LED lights up when the output is active. LEDs Green power LED. Indicates that CT SB2 is switched on and ready for operation. Mains connection unit Status LED. Mains socket with fuse and ON/OFF switch...
Page 201: Block Diagram (Simplified)
(4mm socket combined with knurled nut for clamp connection) Connection of CT SB2 to the remote control interface of CT Analyzer. Figure 3-2: Side view of CT SB2 with mains connection unit, PC and CTA interfaces, and equipotential bonding connector Block diagram (simplified) BURDEN...
Page 202: Ct Sb2 Accessories (Scope Of Delivery)
CT SB2 User Manual CT SB2 accessories (scope of delivery) The following accessories are delivered with the CT SB2 switch box: Table 3-1: CT SB2 accessories Accessory Description 1 x 6-pole cable Cable for connecting CT SB2 to CT Analyzer...
Page 203: Measurement Setup
Measurement setup General When connecting the CT to the CT SB2 switch box, please also observe the wiring hints given in the CT Analyzer User Manual. Always connect only one CT to CT SB2. Disconnect and remove unused cabling from CT SB2 and the CT after testing.
Page 204 CT SB2 User Manual WARNING Death or severe injury caused by high voltage or current possible Observe the following when running tests: ► Prevent the presence of other persons in the potentially dangerous area around the test object. ► If necessary, perform appropriate additional safety precautions according to the...
Page 205: Connecting The Communication Link Between Ct Sb2 And Ct Analyzer
CT Analyzer/CT SB2 connected to PC via RS232 interface: RS232/USB adapter to PC RS232 (crossover) RS232 (1:1) CT Analyzer CT SB2 to PC RS232 (1:1) Figure 4-1: Connection diagrams for communication link CT SB2 - CT Analyzer - PC OMICRON...
Page 206: Basic Measurement Setup For Multi-Ratio Ct Testing
Burden Wiring for burden measurement, see Figure 4-4 For information on how to connect the communication link between CT SB2 and CT Analyzer, please refer to section 4.2 on page 17. Figure 4-2: Basic measurement setup for multi-ratio CT testing (6-tap CT, no burden measurement, no...
Page 207: Basic Measurement Setup For Single-Ratio Ct Testing
Burden Wiring for burden measurement, see Figure 4-4 For information on how to connect the communication link between CT SB2 and CT Analyzer, please refer to section 4.2 on page 17. Figure 4-3: Basic measurement setup for single-ratio CT testing (no burden measurement, no primary...
Page 208: Additional Wiring For Burden Measurement
Basic CT wiring, see Figure 4-2 or Figure 4-3 For information on how to connect the communication link between CT SB2 and CT Analyzer, please refer to section 4.2 on page 17. Figure 4-4: Additional wiring required for burden measurement...
Page 209: Additional Wiring For Primary Winding Resistance Measurement
Basic CT wiring, see Figure 4-2 or Figure 4-3 For information on how to connect the communication link between CT SB2 and CT Analyzer, please refer to section 4.2 on page 17. Figure 4-5: Additional wiring required for primary winding resistance measurement...
Page 210: Ct Testing In Mr Test Mode ("New Mr Test")
User Manual. Preparing and configuring the test 1. Connect CT SB2, CT Analyzer and the CT under test as described in section 4.3 on page 18. 2. Switch on CT SB2 and CT Analyzer. 3. Select "New MR-Test" from the CT Analyzer main menu and press the OK soft key to initialize a new test in the MR Test mode.
Page 211 Use this column to select the tap combinations you actually want to measure during the test. You can enable or disable each single tap combination individually (disabling the full tap combination is not possible). Disabling unused tap combinations reduces the test duration. OMICRON...
Page 212: Running The Test
CT test is running. 2. After starting the test, CT Analyzer first checks communication with the CT SB2 switch box via the serial interface. CT Analyzer then checks the input/output wiring between CT Analyzer and CT SB2 and the corresponding wiring from CT SB2 to the test object.
Page 213 3. Display the CT-Object card and enter the "Location" and "Object" details. Then press the to set the focus to the CT-Object card’s tab and save your test. Figure 5-6: CT-Object card after the test, ready to enter location details OMICRON...
Page 214: Ct Testing In Advanced Mr Test Mode ("New Advanced Mr Test")
Preparing the test 1. Connect CT SB2, CT Analyzer and the CT under test as described in section 4.3 on page 18. 2. Switch on CT SB2 and CT Analyzer. 3. Select "New Advanced MR-Test" from the CT Analyzer main menu and press the OK soft key to initialize a new test in the Advanced MR Test mode.
Page 215 For protection CTs of the IEEE C57.13 classes C, K and T, enter the rated secondary terminal voltage V instead of VA. CT Analyzer then automatically calculates the value for VA. The cos ϕ for the nominal burden is automatically selected according to the standard. OMICRON...
Page 216 CT SB2 User Manual Table 6-2: Data to be specified in the CT-Object card (continued) Parameter Description Burden Operating burden and cos ϕ of the tap in use. cos ϕ If the value of the connected operating burden is available, enter the values to these fields.
Page 217 This column displays for each tap combination the operating burden and cos ϕ specified in the CT-Object card. The values cannot be changed by the user. The "Burden" column is displayed if you selected to display the operating burden using the Op. Burden soft key. OMICRON...
Page 218: Automatic Test Execution
If CT Analyzer detects any missing or faulty connections, a corresponding error message is displayed. The currently active input/output of the CT SB2 switch box is indicated by a green LED on the CT SB2 front panel. 1. CT Analyzer measures the secondary winding resistance of the CT for each tap combination.
Page 219 The assessment of the measurement results for the full tap combination can be viewed on the Assessment card. If desired, you can view the measurement results for the tap in use selected in the MR-Config. card by viewing the Resistance card, the Excitation card and the Ratio card. OMICRON...
Page 220: Default Settings On Ct Analyzer For Multi-Ratio Ct Testing Using Ct Sb2
CT Analyzer allows customization of the default settings for multi-ratio CT testing How to get there: using CT SB2. These settings are defined using the Select Startup Mode option Press the Main soft key in in the Setting Menu of CT Analyzer.
Page 221 Default settings on CT Analyzer for multi-ratio CT testing using CT SB2 Table 7-1: Options in the Set Startup Mode page Option Description Number of Taps Only available if Mode at Startup = Multi-Ratio. The number of taps is the overall number of tap connections available on the multi-ratio CT.
Page 222: Ct Analyzer Test Cards For Mr Test Mode
CT SB2 User Manual CT Analyzer test cards for MR Test mode The test cards described in this chapter are only available for the MR Test mode. Initialize a new test by selecting "New MR-Test" from the CT Analyzer main menu to enter the MR Test mode.
Page 223: Ct-Object Card For Mr Test Mode
Possible values: Value between 16 and 400 Hz or soft keys 16.7Hz, 50Hz, 60Hz or 400Hz. Default: Frequency defined in the default test settings. Definition of CT type: Protection or metering CT. Possible values: Soft keys Prot. CT, Meter. CT. Default: As defined in the default test settings. OMICRON...
Page 224 CT SB2 User Manual Table 8-1: Parameters and settings in the CT-Object card for the MR Test mode (continued) Parameter Description Class Accuracy class of the CT. Possible values: Depending on the selected standard. Default: As defined in the default test settings.
Page 225: Mr-Config. Card For Mr Test Mode
Use the Show Inter Taps soft key to display the intertap combinations instead of the tap combinations. If the intertap combinations are displayed, the soft key is labeled Show Taps. Examples of tap combinations: X1-X2, X1-X3, X1-X4, etc. Examples of intertap combinations: X2-X3, X2-X4, X3-X4, etc. OMICRON...
Page 226: Parameters And Settings
The default number of taps can be selected using the Select Startup Mode option in the Setting Menu, see chapter 7 on page 32. When testing a single-ratio CT using the CT SB2 switch box, select No. Taps 2. However, single-ratio CT testing should preferably be performed using the normal single-ratio CT test mode of CT Analyzer without using CT SB2.
Page 227 Disabling unused tap combinations reduces the test duration. Disabled taps are not measured. Therefore, no test results are available for disabled tap combinations. Disabling a tap combination also disables the corresponding intertap combinations. It is not possible to disable a specific intertap combination. OMICRON...
Page 228: Mr-Results Card For Mr Test Mode
CT SB2 User Manual MR-Results card for MR Test mode After the multi-ratio test is finished, the MR-Results card shows the measurement results for each tap combination and/or intertap combination enabled for testing in the MR-Config. card. If necessary, use the cursor keys to scroll the display.
Page 229 TCF (IEEE C57.13, metering CTs only): Transformer correction factor for metering CTs. ALF (IEC 60044-1, protection CTs only): Accuracy limiting factor for protection CTs. FS (IEC 60044-1, metering CTs only): Instrument security factor for metering CTs. (IEC 60044-6 only): Rated symmetrical short-circuit current factor. OMICRON...
Page 230: Test Results Card For Mr Test Mode
CT SB2 User Manual Test Results card for MR Test mode The Test Results card of the MR Test mode displays the test results for the tap combination selected as tap in use in the MR-Config. card prior to the test.
Page 231: Secondary Winding Resistance Measurement Details
Reference temperature, i.e, temperature the CT is specified for. Value used: Reference temperature defined in the Settings (main menu). The winding resistance at reference temperature is calculated from the winding resistance measured at ambient temperature (T ) and the specified reference meas temperature. OMICRON...
Page 232: Excitation Graph
CT SB2 User Manual 8.4.4 Excitation graph Press the Excit. Graph soft key in the Test Results card to display the excitation graph calculated from the test results. The graph shows the r.m.s. terminal/core voltage over the r.m.s./peak current depending on the selected standard.
Page 233 (e.g. "V-meas" and "L-meas" if you have entered a current "I-meas"). Figure 8-7: Entering a current value to display its corresponding voltage and inductance values on the excitation graph OMICRON...
Page 234: Ct Analyzer Test Cards For Advanced Mr Test Mode
Advanced MR Test mode. Depending on the selected standard, the behavior of the CT-Object card may differ slightly from the normal single-ratio CT test mode without using CT SB2. See section 9.1 on page 47. See section 9.2 on page 50.
Page 235: Ct-Object Card For Advanced Mr Test Mode
CT type. Set "P" for a protection CT or "M" for a metering CT. * This parameter is relevant for assessment. No automatic assessment is available if the user did not enter data for this parameter prior to the test OMICRON...
Page 236 CT SB2 User Manual Table 9-1: CT data in the CT-Object card (continued) Parameter Description Class * Rated accuracy class of the CT. This field becomes available after selecting the CT type (protection CT or metering CT). The class can be selected by soft keys or is determined by CT Analyzer during the test.
Page 237 If the "Check "*" settings before start" option is enabled in the default test settings for CT Analyzer, all parameters that are required for assessment are marked by a star "*" in the CT-Object card. For more detailed information, please refer to the CT Analyzer User Manual. OMICRON...
Page 238: Mr-Config. Card For Advanced Mr Test Mode
CT SB2 User Manual MR-Config. card for Advanced MR Test mode Use the MR-Config. card to configure the multi-ratio test. In this card, set ► the number of taps available on the CT, ► the "tap in use", i.e., the tap combination (ratio) actually used and connected to the operating burden during operation of the CT, ►...
Page 239: Available Soft Keys
The default number of taps can be selected using the Select Startup Mode option in the Setting Menu, see chapter 7 on page 32. When testing a single-ratio CT using the CT SB2 switch box, select No. Taps 2. However, single-ratio CT testing should preferably be performed using the normal single-ratio CT test mode of CT Analyzer without using the CT SB2.
Page 240 CT SB2 User Manual Table 9-3: Parameters and settings used or determined during the test (continued) Parameter Description Tap in Use The tap combination actually used during operation of the CT (e.g. X1-X4). Select the tap combination using the soft keys (for example X1-X5, X1-X4). To select an intertap combination for the tap in use, press the Show Inter Taps soft key.
Page 241 Disabling unused tap combinations reduces the test duration. Disabled taps are not measured. Therefore, no test results are available for disabled tap combinations. Disabling a tap combination also disables the corresponding intertap combinations. It is not possible to disable a specific intertap combination. OMICRON...
Page 242: Mr-Results Card For Advanced Mr Test Mode
CT SB2 User Manual MR-Results card for Advanced MR Test mode After the test is finished, the MR-Results card shows the measurement results for each tap combination and/or intertap combination enabled for testing in the MR-Config. card. If necessary, use the cursor keys to scroll the display.
Page 243 CT is loaded in CT Analyzer. Ratio results and excitation results The measurement results are displayed on two different pages (see Figure 9-3 on page 54). You can toggle these pages using the Show Excit. or Show Ratio soft key. OMICRON...
Page 244 CT SB2 User Manual The following table lists the ratio results displayed in the MR-Results card. Table 9-5: Ratio results displayed in the MR-Results card Column Description Ipn : Isec (A) This column shows for each tap combination the measured current ratio I This column shows for each tap combination the measured winding ratio.
Page 245: Resistance, Excitation And Ratio Card For Advanced Mr Test Mode
The automatic test assessment in the Assessment card is always performed for the full tap combination given by the Number of Taps (e.g. for X1-X5 if number of taps = 5). Please refer to the CT Analyzer User Manual for detailed information about the Assessment card. OMICRON...
Page 246: Technical Data
10.2 PC and CTA interfaces The PC interface of the CT SB2 switch box is exclusively intended to connect the CT SB2 switch box to a computer (e.g., running the CT Analyzer Suite software). The CTA interface of the CT SB2 switch box is exclusively intended to connect CT SB2 to a CT Analyzer test set.
Page 247: Environmental Conditions
2 x female Connections required: 1 2 3 4 5 6 7 8 shield 1 2 3 4 5 6 7 8 shield Figure 10-3: Connection cable CT SB2 to CT Analyzer 10.3 Environmental conditions Table 10-2: Environmental conditions...
Page 248: Mechanical Data
CT SB2 User Manual 10.4 Mechanical data Table 10-3: Mechanical data Characteristic Rating Weight 2.6kg (5.7lbs) without accessories Dimensions W x H x D 285 x 68 x 225mm (11.2 x 2.7 x 8.9") 10.5 Standards Table 10-4: Standards EMC, safety...
Page 249: User Maintenance
3. Disconnect CT SB2 from CT Analyzer and, if applicable, from the computer. 4. Locate the blown fuse on the side panel of CT SB2 and replace it by an identical fuse type: T2.0A H 250V (2.0 Amps slow-acting high breaking capacity wire fuse 5 x 20mm). CT SB2 has two fuses of the same type.
Page 250: Error And Warning Messages For Ct Sb2
CT SB2 User Manual Error and warning messages for CT SB2 The CT SB2-specific error and warning messages of CT Analyzer are listed in chapter "Error and Warning Messages" of the CT Analyzer User Manual. OMICRON...
Page 251: Support
OMICRON Academy – learn more www.omicronenergy.com/academy Learn more about your product in one of the training courses offered by the OMICRON Academy. OMICRON electronics GmbH, Oberes Ried 1, 6833 Klaus, Austria, +43 59495 OMICRON...
Page 252 ENU 1132 05 03...

Omicron CT SB2 User Manual

Ct Analyzer User Manual

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