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Megger IPD ICMcompact User Manual

Megger IPD ICMcompact User Manual

Partial discharge detector
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ICMcompact
Partial Discharge Detector
User Manual
Rev. e4.21
Power Diagnostix Systems GmbH ∙ Vaalser Strasse 250 ∙ D-52074 Aachen ∙ Phone +49 241 74927 ∙ Fax +49 241 79521 ∙ www.pdix.com

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  • Page 1 ICMcompact Partial Discharge Detector User Manual Rev. e4.21 Power Diagnostix Systems GmbH ∙ Vaalser Strasse 250 ∙ D-52074 Aachen ∙ Phone +49 241 74927 ∙ Fax +49 241 79521 ∙ www.pdix.com...

  • Page 3: Table Of Contents

    ICMcompact Partial Discharge Detector Contents General ................................1 About this Manual ........................... 1 Instrument Safety ............................ 1 Principle of Operation ..........................2 Hardware ................................3 II.1 Acquisition Unit ............................3 II.2 Options for the ICMcompact ........................7 II.3 Installation ............................... 8 II.3.1 Connections ..........................
  • Page 4 ICMcompact Partial Discharge Detector III.4.3 External Signal Gating (TTL Gating) ..................67 III.4.4 Gating With External Sensor (Analogue Gating, Optional) ............ 68 III.5 Calibration ............................. 71 III.5.1 Calibration Impulse Generator ....................71 III.5.2 Calibration Test Set-up ......................72 III.5.3 Calibration Menu ........................73 Software for the ICMcompact ........................

  • Page 5: I General

    ICMcompact Partial Discharge Detector General About this Manual This manual describes the hardware, software, and usage of the ICMcompact in its current version. Some of the hardware features of the most recent versions are not available with earlier versions of the instru- ment.

  • Page 6: Principle Of Operation

    ICMcompact Partial Discharge Detector Principle of Operation The ICMcompact partial discharge detector is designed for quality assurance and quality control tests of high, medium, and low voltage insulation in a test laboratory environment. The instrument may be adapted to non- conventional testing tasks such as field testing and diagnostics by use of various preamplifier and couplers.

  • Page 7: Hardware

    ICMcompact Partial Discharge Detector Hardware II.1 Acquisition Unit The standard ICMcompact package includes the partial discharge detector, the remote-controlled pre-amplifier and the standard coupling unit CIL4L. All PD detectors of Power Diagnostix’ are built on a modular concept. Therefor it is possible to vary all external accessory parts like i. e. coupling units, preamplifiers, or calibration impulse generators.
  • Page 8 ICMcompact Partial Discharge Detector The instrument operates with mains supply in the range from 85 V up to 264 V @ 47 to 440 Hz. The standard preamplifier RPA1 is connected to the AMP IN terminal with a normal 50 Ω coax cable, i. e. RG58. The amplified partial discharge signals as well as supply voltage and remote- control signals to the preamplifier are carried via this cable.
  • Page 9 ICMcompact Partial Discharge Detector Fig. II.5: Front panel (top) and rear panel (bottom) of the ICMcompact's standard desktop version with COM (TTL) connector Power Diagnostix Systems GmbH ∙ Vaalser Strasse 250 ∙ D-52074 Aachen ∙ Phone +49 241 74927 ∙ Fax +49 241 79521 ∙ www.pdix.com...
  • Page 10 ICMcompact Partial Discharge Detector Fig. II.6: All-in-one panel of an ICMcompact in an outdoor case with MUX4 option The CIL4L standard coupling unit is a so-called RL coupling unit (inductance-resistance), which is tuned to coupling capacitors in the range of 600 pF to 2500 pF. Its permissible maximum charging current is 50 mA. Other coupling units can be supplied by Power Diagnostix on request.

  • Page 11: Ii.2 Options For The Icmcompact

    ICMcompact Partial Discharge Detector II.2 Options for the ICMcompact The instrument can be equipped with several optional features as: • SPEC board offers an additional frequency spectrum display for PD spectrum analysis. • DSO board for cable fault location. Single PD pulses and their echoes are captured with a high sampling rate to localize faults in long cables.

  • Page 12: Ii.3 Installation

    ICMcompact Partial Discharge Detector II.3 Installation II.3.1 Connections There are various circuits to take measurements of PD with the ICMcompact. The diagram below (fig- ure II.8) illustrates the basic connections among the elements of the partial discharge measuring setup with the ICMcompact.
  • Page 13 ICMcompact Partial Discharge Detector Figure II.9 shows an examples test setup for measurements on a distribution transformer with an ICMcompact with MUX option. Here, a coupling capacitor with built-in quadrupole (e. g. CC35B/V) acts as decoupling unit and provides a voltage signal for synchronisation. If only one channel is used for testing, the MUX output ('MUX OUT') must be connected to the 'AMP IN' terminal.
  • Page 14 ICMcompact Partial Discharge Detector Figure II.10 shows a test-setup on a power transformer using an ICMcompact with MUX option. If only one preamplifier is connected to the instrument, the MUX output ('MUX OUT') must be connected to the 'AMP IN' terminal. Fig.
  • Page 15 ICMcompact Partial Discharge Detector The connections to the standard ICMcompact are made by several BNC connectors, one wing nut screw, and one serial connector. The functions of the connectors are as follows: AMP IN: The AMP IN input is connecting the PD signal with the ICMcompact. The AMP IN connector must be connected to a remote preamplifier (RPA).

  • Page 16: Ii.3.2 Synchronising The Icmcompact

    ICMcompact Partial Discharge Detector If the quadrupole has an optional voltage divider, the output marked “U” is a low voltage copy of the high voltage applied to the test object and coupling capacitor. This output can be used for external synchronisation when connected to the “SYNC IN”...

  • Page 17: Operation

    ICMcompact Partial Discharge Detector Operation III.1 Main Functions After switching on the ICMcompact, the LC screen displays the ICMcompact logo and software version for about two seconds. The instrument is controlled by the five pushbuttons on the front panel. The individual functions are assigned to each button by the menu fields on the right side of the display.

  • Page 18: Iii.1.1 Scope

    ICMcompact Partial Discharge Detector There are two displays to indicate the captured PD activity. In the 'Scope' display every PD signal is shown on a phase resolved graph. In the 'Meter' display the peak value is shown on an analogue meter. III.1.1 Scope Within the Scope mode there are 4 ways to display the PD pattern.
  • Page 19 ICMcompact Partial Discharge Detector In the HOLD mode every partial discharge impulse activates a display pixel at the location according to the pulse magnitude and the phase angle of occurrence. Note that in this case the display is refreshed every 100 ms which allows a visualization of the build- up dynamics of a partial discharge pattern (also called PD-Map or phase-amplitude distribution).

  • Page 20: Iii.1.2 Meter

    ICMcompact Partial Discharge Detector III.1.2 Meter Figure III.7 shows the instrument's display in the MAIN menu and METER mode. The buttons GAIN+ and GAIN- increase or decrease gain resp. amplification factor. Meter scaling automatically tracks the actual calibration and gain factor. The button SCOPE, DSO or HVM activates the next display mode, and the button SETUP calls the configuration menus.

  • Page 21: Iii.2 Key Menus

    ICMcompact Partial Discharge Detector III.2 Key Menus All functions described in this section is based on the firmware version 4.08. You can find the firmware number either by start up at the info-screen or by selecting the INFO submenu while the instrument is run- ning.

  • Page 22: Iii.2.2 Optional Key Menus

    ICMcompact Partial Discharge Detector III.2.2 Optional Key Menus Fig. III.10: Optional menus for gating (GATE) Figure III.10 shows the optional gating menus. These menus become visible if the device has an activated external GATE IN input channel. In this case, the ICMcompact is equipped with an onboard logarithmic preamplifier RPA6G.
  • Page 23 ICMcompact Partial Discharge Detector Fig. III.12: Optional high voltage meter menus (HVM) Fig. III.13: Optional menus (DSO extension) Devices with a DSO acquisition board for cable fault location get the entry UNIT within the MD D2 / UNIT menu. This option allows to select the display unit for cable fault positions. There will also be an additional menu MAIN D for working with the DSO board.

  • Page 24: Iii.2.3 Key Menus Description

    ICMcompact Partial Discharge Detector III.2.3 Key Menus Description The following list explains step by step all menus coming with the standard ICMcompact firmware releases higher than version 4.00. GAIN+ / GAIN- GAIN+ Sets the amplification of the ICMcompact signal path up or down. The total amplification GAIN- is a combination of pre-amplification (external preamplifier, i.
  • Page 25 ICMcompact Partial Discharge Detector DISPL DISPL Pushing this button changes to the DISP S menu. HOLD HOLD AUTO Setting this option (>) enables the ‘hold’ visualization for the phase resolved PD display (SCOPE). Pushing this button again will freeze the current display. Pushing this button AUTO F for the third time will clear the frozen hold display and will continue with the Hold Mode.
  • Page 26 ICMcompact Partial Discharge Detector DISPL DISPL Pushing this button changes to the DISP M menu. RIV MD RIV MD AUTO Push this button to access the MODE menu for RIV measurements. AUTO F AUTO Setting this mode (>) means that the gain will be adjusted automatically to the maximum EXIT level of the current PD-pulses.
  • Page 27 ICMcompact Partial Discharge Detector 160ms >160ms Sets the decay time to 160 ms. 600ms 600ms Sets the decay time to 600 ms. EXIT Sets the decay time to one second. DECAY EXIT Pushing this button changes to the menu MODE. Depending on the optional functions several mode menus and their submenus are add- ed.
  • Page 28 ICMcompact Partial Discharge Detector FILTER FILTER / BW Pushing this button changes to the filter setting menu FILTER. LLD/P BW(only with SPEC mode activated) MISC Pushing this button changes to the bandwidth setting menu BW. MORE.. LLD/P When SCOPE display is active, pushing this button changes to the menu LLDSET to ad- EXIT just the low level discriminator.
  • Page 29 ICMcompact Partial Discharge Detector SPEC >SPEC Activates the SPEC path for display. When not activated, the AMP path is displayed. DYNOPT DYNOPT This entry sets the gain strategy. If activated, the internal gain settings are optimized to accept PD signal with strong dynamic, while the gain settings are focusing on overall low MORE..
  • Page 30 ICMcompact Partial Discharge Detector (only available in the METER display, when RIV mode is selected and NEMA mode acti- vated) k+ / k- Pushing this button increments/decrements the calibration factor (k) of the RIV meas- urement directly. If known from a previous calibration, the factor can be set here to skip further calibration.
  • Page 31 ICMcompact Partial Discharge Detector GAIN+/GAIN- GAIN+ Pushing this button increments/decrements the total gain by one step. This will have no GAIN- impact on the calibration factor. CF+/CF- These buttons can be used to set the calibration factor directly. This function can be used to copy a previously done calibration.
  • Page 32 ICMcompact Partial Discharge Detector << >> << >> Pushing this button widens the window(s) for blinding out the pulses on the display. The width of the windows is displayed at upper right side of the screen. >> << >> << POS>>...
  • Page 33 ICMcompact Partial Discharge Detector >800KHZ >800kHz Pushing this button sets the upper cut-off frequency to 800 kHz. 600kHz 600KHZ 250kHz Pushing this button sets the upper cut-off frequency to 600 kHz. 250KHZ EXIT Pushing this button sets the upper cut-off frequency to 250 kHz. LOWP EXIT Pushing this button changes to the setup menu FILTER.
  • Page 34 ICMcompact Partial Discharge Detector BEEP BEEP The sound when pushing one of the five keys can be modified here. DISPL DISPL UNIT Display modes (SCOPE, METER, DSO and HVM) can be deselected in this menu. MORE.. UNIT The unit for the SCOPE and METER displays can be selected here. EXIT MISC2 MORE..
  • Page 35 ICMcompact Partial Discharge Detector >pC Setting this mode (>) changes from the acoustic measurement mode ('mV') back to the charge measurement mode. Setting this option (>) changes the display unit to 'mV' for the acoustic measurement. For a correct calculation of the input voltage, it is mandatory to connect the RPA1D pre- amplifier or to disconnect the RPA supply in the menu MISC1.

  • Page 36: Iii.2.4 Reset To Default Settings

    ICMcompact Partial Discharge Detector ESYNC ESYNC If this button is selected (>) the frequency measurement and synchronisation signal is 0.1Hz taken from the SYNC IN input, if possible. To manually turn to the line (mains) sync., de- select the button. 0.05Hz 0.1Hz, 0.05Hz, 0.02Hz 0.02Hz...

  • Page 37: Iii.3 Optional Functions

    ICMcompact Partial Discharge Detector III.3 Optional Functions III.3.1 SPEC - Spectrum Function The SPEC display shows the frequency spectrum of the input signal up to 10 MHz. Three traces for the current input channel allow to store, compare and process this spectrum. The figure below shows an exam- ple of a SPEC display with two traces.
  • Page 38 ICMcompact Partial Discharge Detector SWEEP Dwell-time (DWT) is the pause on one frequency during which demodulation takes place. The sweep-time (SWP) is calculated from the dwell-time, the span, and the step-frequency. Sweep-time is the required time for one sweep i. e. scanning through the whole span of frequencies. If the sweep-time exceeds one second, the progress is indicated by an expanding line in the top of the display.
  • Page 39 ICMcompact Partial Discharge Detector A_, B_, C_, A_AVG OFF, C/W, MHD, VW, AVG B_MHD There are three traces (A_, B_ and C_) to display different curves. Pushing one of the three C_C/W buttons will alter through the 5 available modes. EXIT EXIT Pushing this button will change to the menu MD F1.
  • Page 40 ICMcompact Partial Discharge Detector SWP+ / SWP- SWP+ Pushing this button will directly increase / decrease the dwell-time (DWT). It will also SWP- change the sweep-time (SWP). EXIT Pushing this button will change to the menu MD F2. EXIT SWEEP STEP+ / STEP- STEP+ Pushing this button will increase / decrease the frequency step size between each demodu-...

  • Page 41: Iii.3.2 Hvm - High Voltage Meter Display

    ICMcompact Partial Discharge Detector III.3.2 HVM - High Voltage Meter Display Instruments with the option of a HVM display (high voltage meter) are able to calculate and display the volt- age waveform connected to the SYNC IN terminal. The scaling of the amplitude and time base is done au- tomatically so that one full waveform is displayed.
  • Page 42 ICMcompact Partial Discharge Detector Changes to the submenu DIV. There the divider ratio of the high voltage divider can be set. MODE Changes to the submenu Cd. There the low voltage capacitance can be entered. This SCOPE menu is only visible if one of the three VLF is selected in the menu SYNC. SETUP MODE MAIN H...

  • Page 43: Iii.3.3 Vlf - Very Low Frequency

    ICMcompact Partial Discharge Detector III.3.3 VLF – Very Low Frequency Instruments with the optional VLF acquisition are able to synchronise (trigger) at very low frequencies like 0.1 Hz. Since the synchronisation is done by the supplied high voltage, the instrument needs also to have the optional high voltage measurement HVM.
  • Page 44 ICMcompact Partial Discharge Detector Phase Shift Adjustment The ICMcompact will adjust the phase shift (PH) due to the lower frequency automatically. This calculation requires the nominal divider factor and the low voltage capacitor (C ) of the coupling unit. These values can be set in the menu 'MAIN H' while the synchronisation frequency is set to one of the three VLF's (e.

  • Page 45: Iii.3.4 Dso - Digital Storage Oscilloscope For Tdr Measurements

    ICMcompact Partial Discharge Detector III.3.4 DSO – Digital Storage Oscilloscope for TDR Measurements Instruments with an optional DSO acquisition board for cable fault location (TDR) are able to process and display PD signals on a time-based curve. Single PD pattern can be triggered and recorded with a resolu- tion of 10 ns (= 100MSamples/s) and a maximum total display range of 80 µs (with Firmware ≤...
  • Page 46 ICMcompact Partial Discharge Detector III.3.4.2 DSO – Software The set-up for the acquisition of PD pulses in TDR (single PD pulses are observed) has the same principle as for the PD pattern acquisition. A detailed description of this set-up is already given with the VLF mode in section III.3.3;...
  • Page 47 ICMcompact Partial Discharge Detector All functions of the software are accessible by the pull-down menu in the top line. This menu will change with the selection of 'Main' or 'DSO' panel. The fields in the The upper x-y-graph (LOC) displays the The oscilloscope-like display on the upper centre of the DSO results of evaluated measurement curves.
  • Page 48 ICMcompact Partial Discharge Detector Position The displayed range of the x-axis can be shifted by the value 'Position' or the scroll bar above the graph, whereas the trigger is always set as zero position of the x-axis and a pre-trigger time of -1 µs is fixed by the in- strument.
  • Page 49 ICMcompact Partial Discharge Detector Gain, Trigger Level The 'Gain' value defines the total amplification of the high frequent signal. The gain can be set between 1 and 80000 (0–98 dB) in different steps. The trigger level ('Trg.Level') can be set between 0 and 100%. Both values are only accessible in RUN mode.
  • Page 50 ICMcompact Partial Discharge Detector Calibration of the Cable Length The values for the cable length and the pulse velocity can be entered in the fields directly, if known. If only one value is known, the second value can be determined with a calibration measurement. The selection of the calibrated value is done in the menu of the DSO panel: Options / Calibration Mode / Length.
  • Page 51 ICMcompact Partial Discharge Detector Description of the Functions The function keys at the bottom of the window offer the major functions needed for a cable fault location. In the following these are described in detail as well as the different conditions of the program. Active function keys are marked with dark grey.
  • Page 52 ICMcompact Partial Discharge Detector Start/Stop Replay, Start/Stop Scan (F2, Ctrl+A) The second function key (F2) changes its function depending on the program status. You find there the most important functions for the data acquisition (SCAN) and evaluation (REPLAY). The SCAN function can only be used if the software has an online connection to the instrument.
  • Page 53 ICMcompact Partial Discharge Detector Each selected file is automatically counted in the LOC graph. The position of the red cursor determines the marking of a defect within the LOC graph. Report (F3, Ctrl+R) This report is saved together with each cfl file created by the 'Save' (F5) function.
  • Page 54 ICMcompact Partial Discharge Detector The LOC function is automatically started with the replay of saved measurements. It must be pointed out, that the counting within the LOC graph starts from the far end. The display range for the x-axis ('Max. Dis- play') should always be larger than the cable length, otherwise faults can be overlooked.
  • Page 55 ICMcompact Partial Discharge Detector With the buttons 'PgUp' and 'PgDown', the next respectively previous DSO file can be loaded from the current folder. The program has to be in the offline mode. A brief message will give a warning if no DSO file can be found in the selected folder.
  • Page 56 ICMcompact Partial Discharge Detector If the 'Sliding Average' is 'on', multiple acquisitions of the DSO graph are averaged before they are displayed. For this it is necessary to trigger al- ways to the same fault signal. The 'Trigger Mode' allows selecting 'Auto', 'Normal' and 'Single Shot'. This mode affects the repetition of the acquired graphs.
  • Page 57 ICMcompact Partial Discharge Detector III.3.4.3 Calibration for the TDR Before raising the voltage on a cable for the actual PD location, a TDR snapshot is done for calibrating the PD magnitude. This can also provide information on the length of the cable, locations of joints, condition of the neutral wire, and the level of sensitivity you can expect to obtain with PD measurements.
  • Page 58 ICMcompact Partial Discharge Detector III.3.4.4 Measurement example with the TDR The next figures show measurement examples of a cable having a cable joint. In figure III.47 a joint was detected at 305.8 m measured from the far end. Cable joint Joint distance Far end (open) Near end (coupling unit)
  • Page 59 ICMcompact Partial Discharge Detector Once the cable length has been specified and the joints are located, the cable can be energized. Figure III.49 shows a measurement with one fault at 567.4 m taken from the far end. Consider that the dis- tance is now taken between the 1 and 2 cursor (grey and green) but not between the 1...
  • Page 60 ICMcompact Partial Discharge Detector III.3.4.5 Functions for the DSO To get a proper PD pulse, the gain and trigger values have to be set correctly. These factors are independ- ent from the calibration factor described in section III.5.3. Figure III.50 shows an example of a triggered PD pulse with all its echoes taken from an HV test cable.
  • Page 61 ICMcompact Partial Discharge Detector After setting the correct trigger and gain, the PD pulse becomes visible. The triggered pulse and two reflec- tions should be displayed before going on with further evaluations. Adjust the zoom if less or more reflections are visible.
  • Page 62 ICMcompact Partial Discharge Detector III.3.4.6 Key Menus for the DSO Following menus are accessible with an ICMcompact including the DSO for cable fault location. GN/TRG GN/TRG Pushing this button changes to the submenu GN/TRG. Within that menu the user can RUN/HD set the gain, trigger level and trigger mode for the PD display in time domain (DSO dis- play).
  • Page 63 ICMcompact Partial Discharge Detector TRG L+/TRG L- TRG L+ Pushing this button displays and changes the trigger level. More details are described TRG L- above. EXIT Pushing this button changes to the GN/TRG menu. EXIT TRGLVL Activates/deactivates the RUN mode for the DSO display. >HOLD HOLD MEM+...
  • Page 64 ICMcompact Partial Discharge Detector ZOOM+ / ZOOM- ZOOM+ With these buttons the zoom can be adjusted. ZOOM- POS>> / POS<< POS>> With these buttons the displayed position can be adjusted. More details are described POS<< above. EXIT EXIT Pushing this button changes to the setup menu MODE D. ZM/POS CURS 1, CURS 2 CURS 1...

  • Page 65: Iii.3.5 Riv - Radio Interference Voltage Measurement

    ICMcompact Partial Discharge Detector III.3.5 RIV - Radio Interference Voltage Measurement The RIV mode is for the measurement of 'Radio Interference Voltage' according to NEMA 107-1987 and other relevant standards. In this mode, the bandwidth is fixed to 9 kHz. Technically it is a selective µV- meter.
  • Page 66 ICMcompact Partial Discharge Detector III.3.5.3 NEMA 107-1987 Compliant RIV Calibration The ICMcompact is able to automatically measure, calculate, and store the circuit RIV factor (k). This cali- bration should be done after the instrument is adjusted. However, if this factor is already known from a pre- vious calibration, it can be entered in the 'CAL' menu by 'k+' and 'k-'.
  • Page 67 ICMcompact Partial Discharge Detector With the CISPR selected in the MODE menu, the CAL menu offers choosing the calibration magnitude (CAL+/-) and the calibration CAL, which calculates the overall attenuation and corrects the displayed magni- tude. Figure III.57 shows a typical setup. Fig.

  • Page 68: Iii.3.6 Mux - Channel Multiplexer

    ICMcompact Partial Discharge Detector III.3.6 MUX – Channel Multiplexer Instruments with a built-in multiplexer (MUX) are able to switch between 4 or 12 different channels. The front panel of an instrument with this option includes five extra buttons labelled ‘∆ CH ∇’, ‘∆ SYNC ∇’ and ‘LOCK’.

  • Page 69: Iii.3.7 Aux - Auxiliary Inputs

    ICMcompact Partial Discharge Detector III.3.7 AUX – Auxiliary Inputs Up to four auxiliary input channels (AUX) can be ordered for the ICMcompact. These inputs can be used to record extra signals like power, AUX 1 + temperature, pressure etc. Commonly used input levels of either 4 to 20 mA AUX 1 –...

  • Page 70: Iii.4 Noise Reduction

    ICMcompact Partial Discharge Detector III.4 Noise Reduction III.4.1 LLD Noise Ground (Low Level Discriminator) Depending on the environment and the test cir- cuit, different levels of background noise are visible (see figure III.66). Since this noise level is usually stable for the whole phase (360°), it can be removed by the LLD function (low level dis- criminator).

  • Page 71: Iii.4.2 Window Mask (Software)

    ICMcompact Partial Discharge Detector III.4.2 Window Mask (Software) Some disturbances like thyristor firing are phase stable. They can be removed by the software function WIN. This function selects up to three windows which blank out pulses occurring in these windows. Pulses occurring within these windows will neither contribute to the displayed charge peak value of the SCOPE display, nor will they affect the reading of the meter.

  • Page 72: Iii.4.4 Gating With External Sensor (Analogue Gating, Optional)

    ICMcompact Partial Discharge Detector III.4.4 Gating With External Sensor (Analogue Gating, Optional) An effective noise reduction is required in case the ICMcompact is used for partial discharge measurements in an environment with high frequency (HF) disturbance. HF disturbances, which hamper partial discharge detection and which can be handled by the gating function, are, for instance, radar signals, corona dis- charge, or thyristor firing.
  • Page 73 ICMcompact Partial Discharge Detector Two different modes of setting the trigger can be selected from the menu ‘GATE’: MAN G - The manual mode offers to set the trigger from 1 to 100 % of the peak disturbance level. This threshold is displayed in the upper right corner of the display (MAN G) once this mode is active.
  • Page 74 ICMcompact Partial Discharge Detector GT+/GT- Pushing these buttons increments or decrements the total gating time. This value is dis- played at the upper right side of the screen in percent. The instrument automatically ad- justs the threshold level. If the gating signal exceeds this automatically set level, then the GT IN PD signal (AMP IN) is blocked for maximum 100 μs at 50 Hz.

  • Page 75: Iii.5 Calibration

    ICMcompact Partial Discharge Detector III.5 Calibration PD measurements refer to the apparent charge and are relative measurements. Therefore, each new installation, changes of relevant quantity (e. g. bandwidth, coupling capacitance etc.) requires a new calibration. This is done by injecting a known PD pulse close to the origin of the real PD source (test object) and from this calculating the scale factor for the measurement.

  • Page 76: Iii.5.2 Calibration Test Set-Up

    ICMcompact Partial Discharge Detector All calibrators are switched on with the pushbutton On/Off. Both amplitude (Range) and polarity (Pos/Neg) of the single charge pulse per cycle are dis- played and can be adjusted by pushing the two buttons. The instrument is syn- chronised to line frequency by a photo diode.

  • Page 77: Iii.5.3 Calibration Menu

    ICMcompact Partial Discharge Detector III.5.3 Calibration Menu The ICMcompact offers a calibration menu (CAL) which can be found as first item in the menu SETUP1. To have the complete information for doing the calibration, it is best to be in the SCOPE display. However, the menu CAL is not available, when the optional displays HVM or DSP are visible.

  • Page 78: Software For The Icmcompact

    ICMcompact Partial Discharge Detector Software for the ICMcompact There are two software packages available to communicate with the ICMcompact via serial link (USB or COM TTL). • ICMcompact: Standard software to record and save PD measurement data. Optional version for the cable fault location, only to use with the DSO extension. •...

  • Page 79: Iv.1.1 Pattern Acquisition

    ICMcompact Partial Discharge Detector The ICMcompact software can be used online and offline. In the first online session the device code of the instrument has to be entered to keep the serial connection. The PC will then actively communicate with the instrument and take the PD pattern and measurement values.
  • Page 80 ICMcompact Partial Discharge Detector to fixed cut-off frequencies, pattern acquisition using the spectrum path offers selection of a centre frequen- cy up to 10 MHz with a bandwidth of 9 kHz or 300 kHz. 'Mode' shows if the pattern is presented as 2D or 3D view.

  • Page 81: Iv.1.2 Data Record Mode

    ICMcompact Partial Discharge Detector Color The z-axis (i. e. the distribution of the colour) may be coded linear ('Norm') or logarithmic ('Log'). Coding This entry is only available with newer instruments. PD pulses can be separated by its polarity. Bipolar ('BI') shows positive and negative pulses separated, whereas Unipolar ('UNI') does not consider the polarity.
  • Page 82 ICMcompact Partial Discharge Detector The record mode can be configured by the Data Record Settings. Select the Edit / Data Record Settings menu item to open the following window. Fig. IV.5: Data record settings By selecting the Auto Save Data Record File, Auto Save Data Record TXT File, or Auto Save Data Record XLS File, the recorded values are stored in the selected file formats.
  • Page 83 ICMcompact Partial Discharge Detector On the right-hand side of the main panel, the values, which should be displayed in the chart graph, can be selected. Only those values can be selected that are available with the in- strument. If no multiplexer is available, only the values of one channel can be displayed, and the Amp area will be dimmed.

  • Page 84: Iv.2 Extended Software With Cable Fault Location

    ICMcompact Partial Discharge Detector IV.2 Extended Software with Cable Fault Location The optional software extension for cable fault location is specialized for high or medium voltage cable di- agnostic. This requires an ICMcompact instrument with the optional acquisition board ‘DSO’. For the gen- eral functionality of this board and a detailed description of this software extension, see also section III.3.4 'DSO –...

  • Page 85: Iv.3 Specialized Software Hvpilot (Optional)

    ICMcompact Partial Discharge Detector IV.3 Specialized Software HVpilot (Optional) The HVpilot software is designed to control the voltage for a test set up and to take measurements of volt- age (high voltage site), partial discharge (PD), tanδ (dissipation factor) , C (ideal capacitance of the test object).
  • Page 86 ICMcompact Partial Discharge Detector The first step to create a test sequence is the step voltage curve. This can be done offline (without the instruments) and downloaded later to the STEPcom- pact (for the voltage control). Figure IV.8 shows the function panel to create the step voltage curve.
  • Page 87 ICMcompact Partial Discharge Detector Vaalser Strasse 250 52074 Aachen Tel. +49 241 74927 Germany Fax +49 241 79521 Fig. IV.10: Example report Power Diagnostix Systems GmbH ∙ Vaalser Strasse 250 ∙ D-52074 Aachen ∙ Phone +49 241 74927 ∙ Fax +49 241 79521 ∙ www.pdix.com...

  • Page 88: Iv.4 Installation Of Software And Drivers

    ICMcompact Partial Discharge Detector IV.4 Installation of Software and Drivers The software comes with an install- er and is suitable for Microsoft Win- dows 7, 8, and 10. It is developed with National Instruments' LabWin- dows/CVI. Starting the program setup.exe, which is located on the provided CD-ROM, will install the software and the required CVI run time engine.
  • Page 89 ICMcompact Partial Discharge Detector Fig. IV.14: By pressing the 'Finish' button the installation is completed. If the software does not find the instrument at the correct COM port, it is possible to set the COM port man- ually. First open the Windows device manager with only the ICMcompact connected to the computer to find the COM port of the instrument.

  • Page 90: Miscellaneous

    ICMcompact Partial Discharge Detector Miscellaneous Maintenance The ICMcompact does not require any maintenance on a regular basis. There is no fine adjustment on a regular basis required, as the partial discharge measurement is a relative measurement that is calibrated with a reference source prior to a measurement. The calibration impulse generator as the reference source, however, must be calibrated on an annual basis to ensure that its output signal remains within the recom- mended boundaries.

  • Page 91: Declaration Of Conformity

    ICMcompact Partial Discharge Detector Declaration of Conformity The manufacturer Power Diagnostix Instruments GmbH Vaalser Strasse 250 52074 Aachen Germany declares, that the product ICMcompact Partial discharge detector provided it is installed, maintained, and used for which it was made, in accordance with relevant installation standards and manufacturer's instruction, meets the requirements of the following directive(s): Low Voltage Directive 2014/35/EU EMC Directive 2004/108/EG...

  • Page 92: Declaration Of Conformity

    ICMcompact Partial Discharge Detector UK Declaration of Conformity The manufacturer Power Diagnostix Instruments GmbH Vaalser Strasse 250 52074 Aachen Germany declares, that the product ICMcompact Partial discharge detector provided it is installed, maintained, and used for which it was made, in accordance with relevant installation standards and manufacturer's instruction, meets the requirements of the following Statutory Instruments: SI 2016 no.

  • Page 93: Troubleshooting

    ICMcompact Partial Discharge Detector Troubleshooting This section lists some problems that may be encountered in using the ICMcompact along with possible causes and remedies. The ICMcompact doesn’t do anything when powered up. The power fuse might be blown. Unplug the unit and check the power supply fuse. This fuse is located on the rear panel of the ICMcompact (desktop and rack mountable version) or in the upper left corner (Explorer case version) above the on/off switch (see figure II.5 and figure II.6 in section II.1).
  • Page 94 ICMcompact Partial Discharge Detector The ‘RPA?’ message appears in the lower left portion of the data display of the LCD panel, even though the RPA (preamplifier from Power Diagnostix) is connected. The RPA might be installed improperly (backwards). Check to be sure that the BNC connector marked with leads from the sensor (quadrupole, CT, or coupling capacitor), and that the BNC connector which is marked by the sign...

  • Page 95: Technical Data

    ICMcompact Partial Discharge Detector Technical Data VI.1 ICMcompact (Standard) Mains supply: 90–264 V , 47–440 Hz (automatic) Line fuse: 1.6 A (time-lag) Power requirements: Approx. 40 VA Display: Backlit LCD Display resolution: 128 x 240 pixels b/w Operation: 5 menu supported pushbuttons 5 fix function pushbuttons with multi-channel version or remote controlled via software Recorder output:...
  • Page 96 ICMcompact Partial Discharge Detector Synchronisation / HVM Sync. Frequency: 5–505 Hz / VLF (0.02/0.05/0.1 Hz) Maximum voltage: 200 V (140 V ), 100 V nom. peak Ω Input impedance: 10 M A/D converter: ±15 bit Precision: Typ. < 1.5 % Spectrum Function Input sensitivity <...

  • Page 97: Annex

    ICMcompact Partial Discharge Detector Annex VII.1 Preamplifier for Gating with Older Hardware Versions With older hardware versions (manufactured before 2016) in- Bandwidth mode Frequency range struments with gating function came with a built-in preamplifier RPA6. The preamplifier had a logarithmic amplification and MODE1 40 kHz to 800 kHz...

  • Page 98: Vii.2.2 Step-By-Step Guide

    ICMcompact Partial Discharge Detector VII.2.2 Step-by-Step Guide 1.) Open the Windows start menu and type “services.msc”. 2.) Click onto the search result named "Services". The "Services" window will open. 3.) Locate these services in the service list: • NI Domain Service •...

  • Page 99: Vii.2.3 Service Description

    ICMcompact Partial Discharge Detector VII.2.3 Service Description http://www.ni.com/product-documentation/14487/en/ Power Diagnostix Systems GmbH ∙ Vaalser Strasse 250 ∙ D-52074 Aachen ∙ Phone +49 241 74927 ∙ Fax +49 241 79521 ∙ www.pdix.com...

  • Page 100: Viii Index

    ICMcompact Partial Discharge Detector VIII Index LOW ........30 Low level discriminator . 29, 66 LOWP ......... 28 Acoustic ......31 ESYNC ........ 32 AMP IN....8, 9, 10, 11 Explorer case ......3 Analogue gating ....68 EXT ........13 AUTO ....
  • Page 101 ICMcompact Partial Discharge Detector RPA?......13, 90 START+/- ......34 UK Declaration of Conformity RPA1D ........ 31 STEP ......34, 35 ........88 RPA6........93 Step voltage curve ....82 ........37 peak RPA6G ......69, 93 ........38 STEP+/- ....... 36 RUN ........

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