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HVTest HTJS-M Manual

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Dear Client
Thank you for Purchasing our HTJS-M Capacitance & Tan-
Delta Tester. Please read the manual in detail prior to first use,
which will help you use the equipment skillfully.
products continually, so there may be slight
differences between your purchase equipment and
its instruction manual. You can find the changes in
the appendix. Sorry for the inconvenience. If you
have further questions, welcome to contact with our service
department.
may bring voltage, when you plug/draw the test wire
or power outlet, they will cause electric spark.
PLEASE CAUTION RISK OF ELECTRICAL SHOCK!
Company Address:
 T4，No. 41, High-tech 2 Road，East Lake High-tech Development
Zone， Wuhan
 Sales Hotline: 86-27- 87457960
 After Service Hotline: 86-27- 87459656
 Fax: 86-27- 87803129
 E-mail: qiao@hvtest.cc
 Website: www.hvtest.cc
Our aim is to improve and perfect the company's
The input/output terminals and the test column

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Summary of Contents for HVTest HTJS-M

  • Page 1 Dear Client Thank you for Purchasing our HTJS-M Capacitance & Tan- Delta Tester. Please read the manual in detail prior to first use, which will help you use the equipment skillfully. Our aim is to improve and perfect the company's...
  • Page 2  SERIOUS COMMITMENT All products of our company carry one year limited warranty from the date of shipment. If any such product proves defective during this warranty period we will maintain it for free. Meanwhile we implement lifetime service. Except otherwise agreed by contract.
  • Page 3 Make sure the product has been grounded correctly before connecting with the input/output port. Pay Attention to the Ratings of All Terminals To prevent the fire hazard or electric shock, please be care of all ratings and labels/marks of this product. Before connecting, please read the instruction manual to acquire information about the ratings.
  • Page 4 －Security Terms Warning: indicates that death or severe personal injury may result if proper precautions are not taken Caution: indicates that property damage may result if proper precautions are not taken.

  • Page 5: Table Of Contents

    Contents I. Foreword ..................6 II. Security Measures ..............6 III. Testable parameters ..............7 IV. Performance features..............7 V. Technical indicators..............9 VI. Measuring method and principle.......... 10 VII. Wiring methods for common devices......... 11 VIII. Introduction to instrument functions ........15 IX. Operation steps of instrument..........16 X.

  • Page 6: Foreword

    I. Foreword Tan-delta Tester is a basic method in insulation test and effectively detect damp, degradation and partial defect of insulation of electrical equipment. This method is widely used in electric manufacturing, electric equipment installation, connection and preventive test. Measurement on dielectric loss of transformer, mutual inductor, reactor, capacitor, bushing and arrester is the most basic method to test their insulation property.TKC fully-automatic anti-interference dielectric loss tester breaks through the traditional bridge testing method and...

  • Page 7: Testable Parameters

    5. Maintenance, care and regulation of the instrument should be conducted by professionals. 6. Connect the grounding terminal of the instrument with the ground by a ground wire in a reliable way before any wiring. 7. As the testing equipment may produce HV, the testing personnel should abide by the safety operation specification strictly to prevent others from contacting high-voltage component and circuit.
  • Page 8 2. The instrument adopts variable frequency technology to eliminate 50Hz/60Hz power frequency interference. So a reliable data will be reachable even under the strong electromagnetic interference. 3. The instrument adopts large screen LCD . In the process of testing, Chinese menu prompt is visualized and easy to operate. 4.

  • Page 9: Technical Indicators

    will cut off the HV immediately and thus ensure the security of operator. V. Technical indicators Accuracy: Cx: ±（reading×1%+1pF） tgδ: ±（reading×1%+0.00040） Anti-interference: Variable frequency anti-interference, above accuracy can be reached under 200% interference. Capacitance range: Internal HV: 3pF～60000pF/10kV 60pF～1μF/0.5kV External HV: 3pF～1.5μF/10kV 60pF～30μF/0.5kV Resolution: Maximum 0.001pF, 4 valid figures.

  • Page 10: Measuring Method And Principle

    Computer interface: Standard RS232 interface Printer: WH-A7 mini-type thermal printer Environment temperature: -10℃～50℃ Relative humidity: <90% Overall dimension: 460×360×350mm Weight: 28kg VI. Measuring method and principle There are two measuring methods according to whether tested article is grounded, namely UST measurement and GST measurement. Their principles are shown in Diagram 1.

  • Page 11: Wiring Methods For Common Devices

    is determined. Cx in Diagram 1(b) is grounded product, and Cx terminal in the instrument is grounded directly. Icx flows from HV terminal of tested article to sampling resistor in the instrument, thus the total current value is determined. (a) Current vector method (b) Equivalent circuit of tested article Diagram 2 VII.
  • Page 12 2.2 GST, internal reference capacitor, internal HV (conventional GST ) HV core HV shell HV shell GST I-CN 5-Hz I-UN 2.3 UST, external reference capacitor, internal HV; HV core shell Shell Shell Core E-CN 5-Hz Core UN GND 2.4 GST, external reference capacitor, internal HV; HV shell shell HV core...
  • Page 13 2.6 GST, internal reference capacitor, external HV: Core External HV (max 10kV) HV shell Shell GST I-CN 5-Hz E-UN 2.7 UST, external reference capacitor, external HV( HV dielectric loss) Increase external HV as per Cx/C\n voltage level Shell UST E-CN Core Shell 5-Hz...
  • Page 14 Core HV cable Bridge Core When adopting CVT self-exciting measurement, the instrument should measure C firstly and then C with the method of lead measurement and correct impact of voltage division automatically. It should be noticed that the HV cable should be hung in the air; otherwise additional dielectric loss to the ground will cause errors.

  • Page 15: Introduction To Instrument Functions

    VIII. Introduction to instrument functions The instrument panel is as shown in Diagram 3: Diagram 3 1. Cxsocket 2. Cnsocket 3. CVT1 4. CVT2 5. Power jack 6. Power switch 7. High voltage switch 8. Menu key 9. Printer 10. Display 11.

  • Page 16: Operation Steps Of Instrument

    IX. Operation steps of instrument 1. Preparation for measurement: 1) Connect one end of ground wire with ground pole of instrument and the other end with reliable ground in order to ensure instrument casing is at the ground potential. 2) UST: Insert the HV cable plug in the back door HV socket and fix the big red clamp on the other end on the HV terminal lead.
  • Page 17 I-CN 5-Hz 10kV I-UN TEST Diagram 4 Mode: UST Frequency: 5-Hz ……2 Voltage: 10kV 5-Hz 50Hz Test Internal External Standard: Internal reference reference reference Power supply: Internal HV Internal External Diagram 5 Diagram 6 I-CN CX = 50.85PF 5-Hz 10kV I-UN tgδ= 0.002%...

  • Page 18: Notes For Site Test

    tgδ: Loss factor of tested article tgδ value. CX: Measured capacitance value V: Applied voltage value I: Current flowing through the tested article F1, F2: Testing frequencies After completing printing, turn off the power switch and the test comes to an end.
  • Page 19 end voltage measurement method. 4. High air humidity If the air humidity exceeds the standard and results in abnormal increase (decrease or even negative value) of measurement result and its instability, add a shell if necessary. However, adding shell by human factor may change the electric-field distribution of tested article.

  • Page 20: Instrument Detection

    Detect the disconnection status of test cable or short circuit of core and shield with a multimeter; determine whether 220V input power is too high or too low and whether grounding is in good contact. Measure the reference capacitor or tested capacitor with known capacitor and dielectric loss.

  • Page 21: Discussion On Variable Frequency Measurement

    the instrument by interference current, then the anti-interference capacity of instrument cannot be measured. 3) It is not advised to apply interference with an almost HV conductor as it may result in close range point discharge. This kind of discharge resistance is nonlinear resistance, which is likely to produce co-channel interference.
  • Page 22 tgδ tgδ In-series model Constant dielectric loss Actual tested article In-parallel model Low frequency dielectric High frequency dielectric loss curve loss curve (<1kHz) or low frequency circuit resonance 2. Relationship between frequency and dielectric loss The dielectric loss can be divided into two ideal models: RC in series and RC in parallel: RC in series tgδ=2πfRC;...

  • Page 23: F The Instructions On New Features

    XIII. F the instructions on new features 1. Configuration thermal printers：When printing more quickly, no noise. Instrument can automatically according to the environment temperature, adjust the print quality, ensure to print more clear. 2. Discharge tip：Wiring in the testing process automatic monitoring situation, if in the loop have poor contact or strike fire situation, on the left side of the screen in the instrument will display and the number of discharge, in general, lower the number of electricity is not more than 20。...

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