Huazheng HZCT-100B, Manual

Page 1: ...HZCT 100B CT PT Analyzer Huazheng Electric Manufacturing Baoding Co Ltd...

Page 2: ...nt from the Manual In case of any changes we will inform you in the attached sheets Thanks for your understanding If anything is unclear please contact the After Sale Service Department in our company...

Page 3: ...specifications of the product can be used Correct connection and disconnection When the test lead is connected to the charged terminal please don t connect or disconnect the test lead at will Earth th...

Page 4: ...Avoid touching the exposed circuits or charged metal When the product is electrified never touch the exposed contacts or parts...

Page 5: ...ate the product in a humid environment Never operate the product in an explosive environment Keep the surface of the product clean and dry Safety Terminology Warning Warning messages indicate the cond...

Page 6: ...User Interface And Method Of Operation 3 2 1 Current Transformer 3 2 2 Voltage Transformer 11 2 3 Self test Page 14 2 5 Button Function 15 III Appendix 17 A Principle Of Low frequency Test 17 B 10 Er...

Page 7: ...t but can also be used for the tests of various PTs including excitation characteristics of the electromagnetic unit ratio polarity secondary winding resistance ratio error and phase displacement Auto...

Page 8: ...er output Green S1 black S2 terminal measure output voltage Red P1 black P2 terminal measure inductive voltage Keyboard Enter the value and operational command LCD screen GUI 1 3 Technical Parameter H...

Page 9: ...onnection Used for selecting one or more experiment item including four options such as resistance excitation ratio burden etc According to transformer type four options can be combinated as shown in...

Page 10: ...the table 2 1 to wiring For all the CT structures please refer to the description of appendix D for the actual connection mode Step 2 The other windings of the same CT should be opened CT s primary s...

Page 11: ...ng PR PX TPS TPX and TPZ etc 4 Current temperature When measure the temperature of winding generally input the current room temperature for reference 5 Rated frequency 50Hz or 60Hz 6 Maximum measured...

Page 12: ...primary current Used to calculate the ratio of actual current accurately rated burden Rated load of plate power factor for 0 8 or 1 power factor Rated accurate limit coefficient alf K The provisions o...

Page 13: ...fault 500m s Choose C t1 O tfr C t2 O Cycle will be shown t2 Current time limit for the second time default 100m s Choose C t1 O tfr C t2 O Cycle will be shown tal2 Second the flow by maintaining accu...

Page 14: ...limit voltage Ial correspondin g with Ual Note expressed the need for settings that do not need to set up a blank 2 1 3 Test Results The test result interface as shown in fig 2 4 Fig 2 4 The test resu...

Page 15: ...tage and knee current unit V and A According to standard definition when knee voltage increase 10 knee current increase 50 Unsaturated inductance u L unit H The average inductance of linear section fo...

Page 16: ...alcuated coefficient Rated knee potential Ek Ie correspondin g with Ek The actual excitation current corresponding with rated knee potential Rated voltage Ual The rated equivalent second limit voltage...

Page 17: ...periment project description experiment item Description Connection diagram resistanc e excitatio n ratio burden Measure PT s secondary winding resistance Fig 2 5 must disconnection if measuring prima...

Page 18: ...sh interface parameter Settings Switch cursor to where the parameter you want to set by turning the Rotating mouse 1 Serial number and resistance number Input letters and numbers directly 2 Rated seco...

Page 19: ...nd experiment item the results will be also different The detailed as shown in Table 2 5 Table 2 5 PT test results description result description P M Resistanc e resistance 25 R unit resistance value...

Page 20: ...ncy Installation of the output voltage or current frequency scope 0 50Hz After testing Current test set or test voltage set the test frequency the frequency of the device will output the corresponding...

Page 21: ...2 5 Button Function 2 5 1 Button Function For Parameter Interface 1 Open A Report The interface of opening a report is shown in Fig 2 10 Choose to open a report the relative information will be displa...

Page 22: ...urve Selecting the error curve the relationship curve of rated primary current multiple and maximum burden will be shown as fig 2 14 according to 10 or 5 error The x axis is rated primary current mult...

Page 23: ...e Of Low frequency Test IEC60044 6 standard corresponding to the national standard GB16847 1977 claims CT test can be done in conditions lower in frequency than the rated and avoid secondary windings...

Page 24: ...and frequency Therefore as long as the core has the same size on the magnetic flux then the test CT can be lower than the rated frequency of the conduct when the core voltage amplitude required to re...

Page 25: ...efinite M as a multiple of the maximum short circuit current K for the current transformer ratio there are N N N M I I I K I K I I M 2 0 2 1 1 1 10 B 4 Where M I1 The largest one side short circuit cu...

Page 26: ...areas 3 To ensure that all the CT terminal of the other transmission lines disconnect from all other windings open 4 2 5mm2 red and black line CT secondary side connected to the HZCT 100B Output K1 an...

Page 27: ...ction transformer CT test conducted on the connection mode as shown in Figure D 2 Figure D 2 HZCT 100B in the triangle on the transformer connection when the connection mode test Figure D 2 HZCT 100B...

Page 28: ...the HZCT 100B cannot obtain the correct result Figure D 3 HZCT 100B on the transformer bushing testing at the time of CT Connection 4 HZCT 100B in the GIS SF6 switch on the wiring of the CT test mode...

Page 29: ...in V Vs so if the accurate measurement of impedance R can not simply replace the Vs with V Impedance R of the measuring circuit should be used Figure E 2 connection method measuring the voltage meter...

Page 30: ...ure E 4 Four terminal method under test must pay attention to wiring terminal connection winding Figure E 5 the connection is correct Figure E 6 7 the connections are wrong Figure E 5 Figure E 6 Figur...

Page 31: ...round lead 1 4 Fuse pipe 5 5 Red test line 1 6 Yellow test line 1 7 Green test line 1 8 Print paper 4 9 Special driver insurance tube 1 10 Alligator clips red 1 black 1 2 11 Small clip 2 black 1yellow...