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HZJF-9011D

Partial Discharge Detector

User Manual

Huazheng Electric Manufacturing (Baoding) Co., Ltd

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Summary of Contents for HZJF-9011D

Page 1: ...HZJF 9011D Partial Discharge Detector User Manual Huazheng Electric Manufacturing Baoding Co Ltd ...

Page 2: ...al and operate and maintain the instrument according to the manual to prolong its service life Just a light press the test will be completed automatically is the operating characteristics of this instrument If you are satisfied with this instrument please tell your colleagues if you are not satisfied with this instrument please call 0312 6775656 to tell you to serve you at all times Baoding Huazhe...

Page 3: ... Indicators 1 III Operating Principle 3 IV Structure Description 5 V HZJF 9011D Description Of Front Panel And Rear Panel Components 6 VI Operating Instructions 6 VII Packing list 24 VIII User selected equipment Optional need extra money 24 ...

Page 4: ... following functions one key automatic correction high voltage test voltage divider ratio can be set serial communication upload test data The instrument has the characteristics of high sensitivity wide application range wide dynamic range of amplification system multiple frequency band combinations nine kinds and strong anti interference ability It is a practical partial discharge testing instrum...

Page 5: ... 3dB high frequency fh 80 200 300kHz optional NO Tuning Capacitance Range Sensitivity PC Unbalance d Circuit Effective Value Of Allowable Current Unbalanc ed Circuit Balance Circuit 1 0 25 100pF 0 02 30mA 0 25A 2 25 100 400pF 0 04 50mA 0 5A 3 100 400 1500pF 0 06 120mA 1A 4 400 1500 6000pF 0 1 0 25A 2A 5 1500 6000 25000pF 0 2 0 5A 4A 6 0 006 0 025 0 1μF 0 3 1A 8A 7 0 025 0 1 0 4μF 0 5 2A 15A 8 0 1 ...

Page 6: ...h screen display display 1 decimal place 4 Error 1 11 Test frequency display Error less than 1 12 Zero standard system Zero sign is consistent with all ellipse scanning frequencies 13 Structure 1 Dimensions 370mm width 460mm depth 215mm height 2 Weight about 12 5kg III Operating Principle When the sample CX produces partial discharge under the test voltage the pulse current is generated through th...

Page 7: ...en using JZF calibration pulse generator to inject the known electric quantity of sample CX through automatic correction the display value of discharge capacity is consistent with the injected electric quantity so the discharge quantity of the tested object can be read out directly on the touch screen during the voltage test without calculation which is very convenient The working principle of the...

Page 8: ...face of the instrument is divided into two parts front panel and back panel The positions of each component are shown in Fig 2a and 2b Figure 2a HZJF 9011D Schematic diagram of front panel of partial discharge detector Figure 2b HZJF 9011D Schematic diagram of back panel of partial discharge detector ...

Page 9: ...grounding condition of the test site Connect the grounding bolt 5 at the back of the instrument with the grounding wire of the test site with thick copper wire preferably braided copper tape The grounding short circuit piece of the input unit should also be properly grounded 2 According to the size of the test capacitor CX coupling capacitance CK select the suitable serial number input unit In Tab...

Page 10: ...7 Figure 3a Parallel connection Figure 3b Series connection Figure 3c Balanced connection Figure 3d Bridge tapping method ...

Page 11: ...capacitor voltage divider at the high voltage end and connect its output to the input socket 4 of back plate connected to high voltage voltage divider through the measuring cable 5 The common partial discharge test circuit is shown in Figure 4 Figure 4 Standard connection circuit of partial discharge test parallel connection of direct method 2 How to use it Home Screen ...

Page 12: ...9 Windowing interface Setting interface Example 1 adjust the working frequency Step 1 click the working frequency button Step 2 select the corresponding working frequency in the pop up menu ...

Page 13: ...Step 1 click the curve display button Step 2 select the corresponding display mode in the pop up menu Example 3 setting coarse adjustment gear Step 1 click the coarse adjustment gear button Step 2 select the corresponding gear in the pop up menu ...

Page 14: ... the pop up menu Example 5 window operation Step 1 click the window opening button to enable the window opening function Step 2 click the window mode button to select the corresponding selection mode Step 3 adjust the corresponding window opening area through the window position slider and window length slider ...

Page 15: ... be set and the keyboard input window will pop up Step 3 after inputting the corresponding value in the keyboard window click the input completion button 1 Start up preparation Connect the power socket 7 with the 220 V power frequency power supply press the power switch 2 to start the machine select 50 60 in the working frequency button ...

Page 16: ...the test voltage is applied the connection line between the calibration pulse generator and the test object must be disconnected to prevent the high voltage from damaging the calibration pulse generator 3 Test operation Turn on the power supply of high voltage test circuit slowly increase the test voltage press the ellipse rotation button select the rotation angle and make the ellipse turn to the ...

Page 17: ...ing the discharge pattern It is judged according to the discharge position and movement in the discharge pattern the consistent degree of discharge amplitude in positive and negative half cycle and the variation characteristics of discharge amplitude with test voltage and pressurization time which can only be roughly introduced here Generally speaking the main characteristic of partial discharge w...

Page 18: ...form characteristics are as follows there are many discharges with small amplitude in the positive half cycle and a few discharges with large amplitude in the negative half cycle and the amplitude difference can reach 10 1 Others are the same as above A typical example is the discharge of polyethylene cable with poor adhesion between insulation and conductor If the discharge amplitude increases wi...

Page 19: ...lue Cause discharge caused by the gap between metals The gap may be between two independent metal bodies on the ground or in the sample such as loose shielding Fig 7a Fig 7b 4 External tip corona see Figure 8a waveform characteristics the initial discharge only occurs in one and a half cycles of the test voltage and is symmetrically distributed on both sides of the peak value When the test voltage...

Page 20: ...is at high voltage if it appears in negative half cycle the tip is at ground potential Fig 9a Fig 9b 6 Poor contact FIG 10 waveform characteristics symmetrically distributed on both sides of the zero point of the test voltage the amplitude is roughly unchanged but it drops to zero near the peak value of the test voltage and the waveform is rough and unclear When the voltage increases the amplitude...

Page 21: ...ate high frequency waveform broadening thus increasing the space occupation Fig 11b The reason is that there are silicon controlled elements nearby in operation Fig 11a Fig 11b 8 Relay contactor glow tube and other actions Fig 12 waveform characteristics irregular or intermittent waveform It has nothing to do with the test voltage Cause thermal relay contactor spark tester and recorder with spark ...

Page 22: ...Fig 14 waveform characteristics fence like pulse with the same amplitude with two clusters of pulse groups symmetrically appearing in positive and negative half waves Reason fluorescent lamp lighting Fig 14 11 Waveform characteristics of radio interference Fig 15a FIG 15b high frequency sine wave with amplitude modulation independent of test voltage Reasons wireless telephone broadcast telephone c...

Page 23: ...18 waveform characteristics lower frequency harmonic oscillation appeared in two and a half cycles The amplitude increases with the increase of voltage and disappears without voltage Cause resonance caused by magnetic saturation of various iron core equipment test transformer filter reactor isolation transformer etc of the test system Fig 18 15 The electrode moves mechanically in the direction of ...

Page 24: ... After understanding the waveform characteristics and sources of various discharge types and identifying the interference measures can be taken to eliminate the interference causes and correctly conduct discharge measurement according to the specific situation 2 The main formation and invasion ways of interference 1 The main forms of interference are interference from power supply network interfer...

Page 25: ... of the power grid system the secondary winding is shielded to the ground of the test circuit or the ground of the fully shielded system 2 Set up shielding room Only the test circuit part can be shielded while the high voltage transformer is outside and the high voltage is introduced by bushing but filter must be used High voltage power supply can also be placed in the shielding room while the par...

Page 26: ... filter in series in the high voltage lead and the effect is also very good Fig 21 High voltage filter connected to test circuit In the figure CX is the sample CK is the coupling capacitance ZM is the input unit 5 Balance method or bridge test circuit is used 6 By using the time window of the gate unit the interference of the fixed phase does not fall into the window 7 The amplifier adopts narrow ...

Page 27: ...High voltage resistance 10kv 500kv voltage level optional 3 OWF series coupling capacitor 10kv 500kv voltage level 500 2000pf optional 4 Fof series voltage divider capacitor 10kv 500kv voltage level 500 2000pf optional 5 JZF series calibration pulse generator jzf 6 jzf 9 and jzf 10 optional 6 LB series power isolation filter 7 YXY series power frequency high voltage test console 8 Ywdt series powe...

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