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you understand the change to the resistive leakage current of the metal oxide arrester, you can

predict whether the above failures occur.

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12

Содержание HTYB-3H

Страница 1: ...u can find the changes in the appendix Sorry for the inconvenience If you have further questions welcome to contact with our service department The input output terminals and the test column may bring...

Страница 2: ...this product can only be used within the prescribed scope Only qualified technician can carry out maintenance or repair work To avoid fire and personal injury Use Proper Power Cord Only use the power...

Страница 3: ...o not operate this product when covers or panels removed Use Proper Fuse Only use the fuse with type and rating specified for the product Avoid Touching Bare Circuit and Charged Metal Do not touch the...

Страница 4: ...ecurity 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 take...

Страница 5: ...able of Contents I Overview 1 II Structure Diagram for Instrument Panel 1 III Main Technical Indexes 1 IV Wiring Diagrams 1 V Instrument Operation 2 VI Measurement Principle and Data Analysis 4 VII Pr...

Страница 6: ...ests II Structure Diagram for Instrument Panel Figure 1 III Main Technical Indexes Range of reference voltage input peak 10V 200V Customizable 0 250V Measurement range of full leakage current peak 100...

Страница 7: ...r and the ground Boosting value 10KV 1 5 35KV 3 2 Online wiring diagram live test Figure 3 In the online measurement the voltage signal input is connected to the secondary side of PT located at the sa...

Страница 8: ...inding For example for the testing transformer with AC output rated voltage of 50KV the rated voltage of the measuring instrument winding is usually 100V so the transformation ratio is 50KV 100V 500 D...

Страница 9: ...s fund I 0 000mA Freq 50 00Hz Res I3 0 000mA A Power 0 000W Res I5 0 000mA R Power 0 000W Res I7 0 000mA Ratio 0 000 Res IMax 0 000mA Angle 0 000 Diff Phase 0 00 Prev Next Y Print N Esc Figure 7 Data...

Страница 10: ...rference can be considered when MOA performance is evaluated Based on B phase the reduced value of A phase is basically equal to the increased value of C phase according to the symmetry of interphase...

Страница 11: ...t To judge whether the valve disc of the metal oxide arrester is aged or affected with damp usually observe the change of resistive leakage current flowing through the zinc oxide valve disc in the nor...

Страница 12: ...7 you understand the change to the resistive leakage current of the metal oxide arrester you can predict whether the above failures occur...

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