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NDB Technologie XDP-II Скачать руководство пользователя страница 13

XDP-II User’s Guide 

NDB Technologie Inc. 

02/04/08 

13 

5. APPLICATIONS 

5.1. 

XPLE/EPR TYPE CABLE SPLICE & ELBOW PD CHECK 

It is strongly recommended to proceed to the calibration of XDP-II before entering 
a manhole or a cable junction room. (See Calibration Check in chapter 3). 

Any installation of new equipment in underground networks should be verified for 
reliability  and  security  purposes.  To  this  effect,  the  XDP-II,  with  the  use  of  its 
capacitive  sensor,  can  detect  partial  discharges  (PD)  that  may  occur  if  the 
equipment is not properly installed. (See Figure 16). 

 

Fig. 5.1: Capacitive sensor on an XLPE cable. 

You only need to slide the spatula sensor along the cables to be inspected. It is 
important for the sensor to be in close contact with the cables. You don’t need to 
adjust the gain as this is done automatically. 

The volume keys allow the used to adjust the sound level as needed. 

 

•

 

Always use the spatula sensor on isolated cables. 

•

 

For significant measurements, the XDP-II must be 
used on live voltage cables. 

 

 

Содержание XDP-II

Страница 1: ...nologie Inc 02 04 08 1 PARTIAL DISCHARGE DETECTOR XDP II User s Guide Version 7 2 March 2009 NDB Technologie Inc 1405 St Jean Baptiste St suite 111 Québec QC G2E 5K2 Canada Phone 418 877 7701 Fax 418 877 7787 http www ndbtech com ...

Страница 2: ...4 08 2 XDP II User s Guide Copyright 2006 and published by NDB Technologie Inc 1405 St Jean Baptiste St suite 111 Québec QC G2E 5K2 Canada Phone 418 877 7701 Fax 418 877 7787 http www ndbtech com Last Edition March 2009 Document no XDP II rev 7 2 ...

Страница 3: ...02 capacitive sensor 8 4 XDP II Main Functions and Modes 9 4 1 Menus 9 4 2 Peak Angle Mode 10 4 3 Analysis Mode 12 4 4 Edge Mode 12 5 Applications 13 5 1 XPLE EPR TYPE Cable splice elbow PD check 13 5 2 Filters 14 5 3 Off line partial discharge test kit using a variable transformer 16 5 4 Off line partial discharge test kit using a PD free source 20 5 5 Switchgears 24 6 Technical Specifications 25...

Страница 4: ...es on isolated equipment In maintenance programs it allows the monitoring of decaying equipment hence providing a safer environment for workers The partial discharge signal is detected by a capacitive coupling and then amplified by the XDP II in a radio frequency bandwidth The signal amplitude is proportional to the discharge energy The XDP II can display this level of discharge in dB or in picoco...

Страница 5: ...V AC DC adapter User s guide Fig 2 0 The following options are also available for the XDP II Capacitive spatula sensor Reference module with BNC BNC adapter Inductive sensor Differential sensor Capacitive coupler 50 kV BNC cable Nylon mesh pouch with transparent protection membrane Handling rod Customized sensor according to application Waterproof case XDP II Software ...

Страница 6: ...XDP II User s Guide NDB Technologie Inc 02 04 08 6 2 2 XDP II OVERVIEW Figure 2 1 XDP II overview ...

Страница 7: ...ws the user to listen to the signal 6 BACK Send back to the preceding menu level when in the menu options This key can also give the absolute value related to the dB 7 ENTER Selects options in the menus 8 UP VOLUME When used in the default reading mode raises the speaker s volume When used in the menus sends to the upper option 9 BACKLIGHT Toggles the backlight on and off press once to get 50 inte...

Страница 8: ... by pressing the I O key 5 Verify that the value displayed by the XDP II is identical to the value given on the sensor s case 6 Disconnect the reference module after testing Note The test signal lasts thirty seconds and immediately starts after the activation of the XDP II If you do not have time to complete the test during this time you will have to reset the XDP II by turning it off and on again...

Страница 9: ...ther in this chapter PEAK ANGLE CALIBRATION PICO ANALYSIS EDGE FILE Thanks to this function the user can listen to signals previously saved as well as signatures downloaded with the software The up and down arrow buttons are used to select the recordings Three submenus can be selected OPEN FILE DELETE ALL REF SIGNATURES PARAMETERS This mode is used to define three different parameters for the XDP ...

Страница 10: ...djust the real time clock on your XDP II This setting is very important as the date and time are automatically associated with the record number LANGUAGE Sets the XDP II system language Five different languages are available English French Spanish German or Italian CONTRAST Sets the contrast level of the LCD VERSION Displays the XDP II firmware version 4 2 PEAK ANGLE MODE Description The peak angl...

Страница 11: ...xt step Fig 4 2 Fig 4 3 Fig 4 1 Fig 4 2 4 Make sure the S is visible on the top right corner of the screen This indicates that the XDP II is synchronized to the network Fig 4 3 If synchronization cannot be achieved the XDP II will display SCAN SYNCHRO The synchronization is not possible without a special device and interface for sampling network voltage 5 Select the scan time by using the arrow ke...

Страница 12: ...o the signal acquired by the XDP II is SIGNATURE 2 The signatures are selected in the XDP II software Fig 4 5 4 4 EDGE MODE Using a high frequency sampling this mode displays the accurate graphic of the partial discharge signal edge One sample is taken every 30 ns and is displayed on the graphic The shape of the pulse gives you information on the distance between the sensor and the fault As illust...

Страница 13: ...the XDP II with the use of its capacitive sensor can detect partial discharges PD that may occur if the equipment is not properly installed See Figure 16 Fig 5 1 Capacitive sensor on an XLPE cable You only need to slide the spatula sensor along the cables to be inspected It is important for the sensor to be in close contact with the cables You don t need to adjust the gain as this is done automati...

Страница 14: ...if the fault is coming from the inside or from the outside of the cable Partial discharges located between 0 º and 180 º will be identified as a fault going to ground Fig 5 2 Partial discharges located between 180 º and 360 º will be identified as a fault going to the cable s center conductor Fig 5 3 As shown in figure 5 2 many partial discharges happen at many different angles but the XDP II will...

Страница 15: ...XDP II User s Guide NDB Technologie Inc 02 04 08 15 STANDARD FILTERS 200 KHz to 2 MHz XDP 049 2 MHz to 20 MHz XDP 048 15 MHz to 40 MHz XDP 052 Custom filters may also be available upon request Fig 5 4 ...

Страница 16: ...tive coupler XDP 050 4 High voltage cable EWXDP050 02A 5 200pC calibrator XDP 202 6 4mm extension EWXDP203 02A 7 Calibrator ground cable EWXDP203 01A 8 Integrator filter 2 MHz XDP 205 9 2 BNC to BNC coaxial cables EWXDP050 03A 10 Line filter output cable EWXDP021 01A 11 Line filter cable WIR X 037 12 Metal plate reference ground XDP 206 13 Low voltage variable transformer Option Make sure that you...

Страница 17: ...I and slide the switch to the 0 dB position 2 Connect the calibrator and the XDP II The device under test as well as the high voltage transformer source must be properly connected for valid calibration 3 Make sure that the XDP 202 is connected to the coupler and select CALIBRATION PICO menu and then 200pC Select 200pC ...

Страница 18: ...05 calibrators the reading should show about 38 to 40dB The XDP II is now calibrated with a signal of 40 to 50dB Measurements in pC will now vary along with those in dB Note If you have 39dB for 200pC the maximum value before overload is 2000pC For higher values use filter switch at 20dB attenuation and recalibrate the XDP II The maximum value before overload is then 20 000pC ...

Страница 19: ...0 to 130V or 0 to 250V A variable transformer Variac is used to control the voltage connected to the transformer secondary winding The voltage is increased until partial discharges appear Note The XDP II will shut down automatically after 15 minutes of inactivity If this occurs calibration must be redone ...

Страница 20: ... coupler XDP 050 4 200 pC calibrator XDP 202 5 200 kHz to 2 MHz integrator filter XDP 205 6 4 mm extension EWXDP203 02A 7 Calibrator ground cable EWXDP203 01A 8 2 BNC to BNC coaxial cable EWXDP050 03A 9 2 foot high voltage cable EWXDP050 02A 10 1 5 foot high voltage cable EWXDP050 01A 11 2 Line filter cable WIR X 037 12 Grid plane XDP 206 13 High voltage control source 14 High voltage transformer ...

Страница 21: ...nnect the calibrator and the XDP II For proper calibration the device under test as well as the high voltage transformer source must be connected 2 From the XDP II menu select CALIBRATION PICO menu and then 200pC Select 200 pC 3 Wait 20 seconds and then press SELECT to quit calibration 4 Remove the XDP 202 from the coupler ...

Страница 22: ...th a signal in dB Measurements in pC will now vary along with those in dB Note If you have 39dB for 200pC the maximum value before overload is 2000pC For higher values use filter switch at 20dB attenuation and recalibrate the XDP The maximum value before overload is then 20 000pC Note A new calibration must be done each time a new connection is made with the set up ...

Страница 23: ... Test procedure A variable high voltage source is used to control the test voltage Voltage is increased until partial discharges appear Note The XDP II will shutdown automatically after 15 minutes of inactivity If this occurs calibration must be redone ...

Страница 24: ... on both phases are eliminated To work on switchgears with the XDP II the equipment must have a VIS Voltage Indicator System The switchgear coupler is connected by removing the indicator lamp or the test points Fig 5 6 Fig 5 6 Fig 5 5 In only three readings the XDP II detect on which phase the problem is Example A B 15dB A C 5dB B C 15dB In this example the problem is on phase B because the partia...

Страница 25: ...utomatic shutoff of the backlighting after 30 seconds LCD Liquid Crystal Display displays the results in easy to read big letter casings PC interface Windows for the analysis and the follow up of results and also for signature programming Measurement follow up through the Access database 4 polarities can be selected 5 different languages available Display of partial discharges with phase angle vie...

Страница 26: ... Calibration pC Automatic via signal injection Adjustments EEPROM on the micro controller Operating Temperatures 4 F to 122 F 20 C to 50 C Storage Temperatures 4 F to 122 F 20 C to 50 C Humidity 0 to 95 non condensing Submersible rainproof Autonomy 8 hours Batteries 6 X A size NiMH rechargeable cells 2 1 Ah Charger 12V 1A adapter with a sealed connector available for 110V or 220V Charging Time 3 h...

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