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Table of Contents
Summary of Contents for NDB Technologie XDP-II
- Page 1 XDP-II User’s Guide 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 NDB Technologie Inc. 02/04/08...
- Page 2 NDB Technologie Inc. Copyright © 2006, and published by: 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 NDB Technologie Inc. 02/04/08...
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Page 3: Table Of Contents
Product Overview ..................... 5 2.1. Equipment and Accessories................5 2.2. XDP-II Overview....................6 Calibration Check (when using xdp-302 capacitive sensor) ........8 XDP-II Main Functions and Modes ................9 4.1. Menus: ......................9 4.2. Peak-Angle Mode.....................10 4.3. Analysis Mode ....................12 4.4. -
Page 4: Introducing The Xdp-Ii
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 picocoulombs (pC) if pC mode is selected in the calibrated set-up. -
Page 5: Product Overview
XDP-II User’s Guide 2. PRODUCT OVERVIEW 2.1. EQUIPMENT AND ACCESSORIES The following standard components are provided with the XDP-II: • A 12 V AC/DC adapter • User’s guide Fig 2.0 The following options are also available for the XDP-II: • Capacitive spatula sensor •... -
Page 6: Xdp-Ii Overview
XDP-II User’s Guide 2.2. XDP-II OVERVIEW Figure 2.1: XDP-II overview NDB Technologie Inc. 02/04/08... - Page 7 Please note that the backlight shuts off automatically after 45 seconds. I/O: Turns the XDP-II on and off. DOWN / VOLUME (-): When used in the default reading mode, lowers the speaker's volume. If used in the menus, browses menus and submenus.
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Page 8: Calibration Check (When Using Xdp-302 Capacitive Sensor)
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. -
Page 9: Xdp-Ii Main Functions And Modes
4. XDP-II MAIN FUNCTIONS AND MODES 4.1. MENUS: The XDP-II has five menus and many submenus that allow the user to perform a variety of tasks: SAVE: This menu allows the user to record the signal by pressing the "... -
Page 10: Peak-Angle Mode
SYSTEM: In this menu, the user can choose between four submenus: DATE TIME: You can adjust 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. - Page 11 Procedure The peak-angle mode needs to be used with either the XDP-012 Bi-phase Coupler or the XDP-050 Capacitive Coupler. The XDP-II must have a direct connection to be able to synchronize with the line frequency. 1. Connect the XDP-II to your system.
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Page 12: Analysis Mode
4.3. ANALYSIS MODE In this mode, the signal acquired by the XDP-II is compared with its own signature database. The XDP-II then displays, in percentage, the four nearest signatures found. It also displays the correspondence with all ten signatures on a bar graph as well as the intensity of the signal, in dB. -
Page 13: Applications
(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. -
Page 14: Filters
As shown in figure 5.2, many partial discharges happen at many different angles but the XDP-II will only display the absolute value of the one with the highest amplitude. The polarity will also be displayed. You will only see PEAK ABS when the scan is complete, therefore if you selected a scan of 30 seconds, you will have to wait 30 seconds to see PEAK ABS appearing. - Page 15 XDP-II User’s Guide 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 NDB Technologie Inc. 02/04/08...
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Page 16: Off-Line Partial Discharge Test Kit (Using A Variable Transformer)
Make sure that your equipment is properly grounded at all times. Calibration set-up for transformer is illustrated below. This mode is used to calibrate the XDP-II in order to see the measurements in picocoulombs. The measurements in picocoulombs (pC) will match the initial measurements in dB, which were taken during calibration check. - Page 17 XDP-II User’s Guide 1. Plug the filter integrator (XDP-205) direcly to the input of XDP-II 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.
- Page 18 5. Remove the XDP-202 from the coupler. Note: With XDP-202 and XDP-205 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.
- Page 19 (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. NDB Technologie Inc. 02/04/08...
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Page 20: Off-Line Partial Discharge Test Kit (Using A Pd Free Source)
Note: Make sure your equipment is properly grounded at all time. The set-up for calibration is illustrated below. This mode is used to calibrate your XDP-II in order to be able to see the picocoulomb on the screen.The picocoulomb (pC) will match the initial dB taken during calibration. - Page 21 XDP-II User’s Guide Warning: The high-voltage source is unplugged during this procedure. 1. Connect 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 menu and then 200pC.
- Page 22 XDP-II User’s Guide Note: With XDP-202 and XDP-205 calibrators, the reading should show about 38 to 40dB. The XDP-II is now calibrated with 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.
- Page 23 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. NDB Technologie Inc. 02/04/08...
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Page 24: Switchgears
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... -
Page 25: Technical Specifications
• Display in picocoulombs and dB on the same screen. 6.2. BATTERIES To recharge the batteries, simply connect the 12V AC/DC adapter in the corresponding socket for 3 hours. The XDP-II cannot be used while it is being recharged. NDB Technologie Inc. 02/04/08... -
Page 26: Specifications
XDP-II User’s Guide 6.3. SPECIFICATIONS • Resolution in pC 5 pC * • Sensibility Dynamic Range 60 dB, of which 40 dB in automatic gain • Number of reference 10 signatures signatures • Number of samplings per signature • Bandwidth 300 kHz to 70 MHz •...
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