Megger PD ICMmonitor User manual

Power Diagnostix Systems GmbH ∙ Vaalser Strasse 250 ∙ D-52074 Aachen ∙ Phone [phone] ∙ Fax [phone] ∙ www.pdix.com
ICMmonitor
Partial Discharge Monitor
User Manual
Rev. e3.41

ICMmonitor Partial discharge monitor
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Contents
IGeneral ............................................................................................................................................................. 1
I.1 About this manual................................................................................................................................... 1
I.2 Instrument safety .................................................................................................................................... 1
I.3 Battery module warnings........................................................................................................................ 2
II Introduction...................................................................................................................................................... 2
III Hardware .......................................................................................................................................................... 3
III.1 Models .................................................................................................................................................... 3
III.1.1 Rack mountable versions ......................................................................................................... 3
III.1.2 Enclosure for DIN rail mounting................................................................................................ 7
III.1.3 Explorer case ............................................................................................................................ 9
III.2 Cabinet.................................................................................................................................................. 10
III.3 Options.................................................................................................................................................. 11
III.4 Accessories .......................................................................................................................................... 13
III.5 Connections.......................................................................................................................................... 15
IV Operation........................................................................................................................................................ 17
IV.1 General ................................................................................................................................................. 17
IV.2 Main display modes.............................................................................................................................. 19
IV.2.1 Scope display.......................................................................................................................... 19
IV.2.2 Monitoring display ................................................................................................................... 20
IV.2.3 Projection display .................................................................................................................... 20
IV.2.4 Trending display...................................................................................................................... 21
IV.2.5 Spectrum display..................................................................................................................... 21
IV.3 Key menus............................................................................................................................................ 23
IV.3.1 Overview .................................................................................................................................23
IV.4 Optional key menus.............................................................................................................................. 43
IV.5 Calibration............................................................................................................................................. 47
IV.5.1 Calibration impulse generator.................................................................................................47
IV.5.2 Calibration menu..................................................................................................................... 49
IV.6 Noise reduction..................................................................................................................................... 51
IV.6.1 LLD noise ground (low-level discriminator) ............................................................................ 51

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IV.6.2 Window mask (software) ........................................................................................................ 52
IV.6.3 Gating with external sensor (analogue gating)....................................................................... 53
VApplication examples ................................................................................................................................... 55
V.1 Rotating machine monitoring................................................................................................................ 55
V.2 Transformer monitoring ........................................................................................................................ 57
V.2.1 Typical setup ........................................................................................................................... 57
V.2.2 Commissioning........................................................................................................................ 61
V.2.3 Operation.................................................................................................................................64
V.2.4 PD pattern examples .............................................................................................................. 65
VI The ICMmonitor software............................................................................................................................. 67
VI.1 Starting the program............................................................................................................................. 67
VI.2 Main functions....................................................................................................................................... 68
VI.2.1 Setup (F1, Ctrl+T) ................................................................................................................... 69
VI.2.2 Print (F2, Ctrl+P) ..................................................................................................................... 70
VI.2.3 NQS Trending (F3, Ctrl+N)..................................................................................................... 70
VI.2.4 Load (F4, Ctrl+L)..................................................................................................................... 70
VI.2.5 Save (F5, Ctrl+S) .................................................................................................................... 70
VI.2.6 Search / Offline (F6, Ctrl+E) ................................................................................................... 70
VI.2.7 Dial / Disconnect (F7, Ctrl+D) .................................................................................................71
VI.2.8 Start / Stop Auto-scan (F8, Ctrl+A)......................................................................................... 71
VI.2.9 Scan / Stop (F9, Ctrl+C) ......................................................................................................... 71
VI.2.10 Exit (F10, Ctrl+X)..................................................................................................................... 72
VI.3 Main menu ............................................................................................................................................ 72
VI.3.1 File menu.................................................................................................................................72
VI.3.2 Edit menu ................................................................................................................................ 73
VI.3.3 Measurement menu................................................................................................................ 81
VI.3.4 Options Menu.......................................................................................................................... 81
VI.3.5 Help menu............................................................................................................................... 83
VI.4 Auto-scan mode.................................................................................................................................... 84
VI.5 NQS trending analysis.......................................................................................................................... 87
VI.5.1 Button bar................................................................................................................................ 89
VI.5.2 Replay mode........................................................................................................................... 89

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VI.5.3 Loading via FTP ...................................................................................................................... 89
VI.5.4 Menu options........................................................................................................................... 91
VI.6 Pattern acquisition ................................................................................................................................ 93
VI.7 Spectrum analyser................................................................................................................................ 96
VI.8 Frequency spectrum calibration ........................................................................................................... 98
VI.8.1 Frequency spectrum calibration process.............................................................................. 101
VI.9 Optional software functions ................................................................................................................ 102
VI.9.1 ICMServer ............................................................................................................................. 102
VII MWS – Monitoring web server (optional)................................................................................................. 103
VII.1 Overview ............................................................................................................................................. 103
VII.2Signal flow........................................................................................................................................... 103
VII.3 Web interface...................................................................................................................................... 104
VII.3.1 Login und overview page...................................................................................................... 104
VII.3.2 Display................................................................................................................................... 106
VII.3.3 Pattern................................................................................................................................... 107
VII.3.4 Spectrum............................................................................................................................... 109
VII.3.5 AutoScan............................................................................................................................... 111
VII.3.6 Trending ................................................................................................................................ 112
VII.3.7 Alarm ..................................................................................................................................... 113
VII.3.8 Export .................................................................................................................................... 114
VII.3.9 Setups ................................................................................................................................... 118
VII.3.10 Calibration ............................................................................................................................. 125
VII.3.11 Manual calibration................................................................................................................. 126
VII.3.12 Automatic SPEC calibration.................................................................................................. 128
VII.3.13 Apply saved manual calibrations .......................................................................................... 131
VII.3.14 Apply saved automatic SPEC calibrations ........................................................................... 131
VII.3.15 Status (administrators only) .................................................................................................. 134
VII.3.16 User (administrators only)..................................................................................................... 135
VII.4 Rest API.............................................................................................................................................. 136
VII.4.1 Login...................................................................................................................................... 136
VII.4.2 Alarm ..................................................................................................................................... 136
VII.4.3 Exports .................................................................................................................................. 137

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Copyright 2023by Power Diagnostix. All rights reserved. No part of the content of this manual may be repro-
duced or transmitted in any form or by any other means without the written
permission of the publisher. Product
and company names herein may be the trademarks of their respective owners.
VIII FAQ (Troubleshooting)............................................................................................................................... 138
IX Miscellaneous.............................................................................................................................................. 143
IX.1 Maintenance ....................................................................................................................................... 143
IX.2 Product marks..................................................................................................................................... 143
IX.3 Shipment instructions ......................................................................................................................... 143
IX.3.1 Instrument ............................................................................................................................. 143
IX.3.2 Batteries ................................................................................................................................ 143
IX.4 Declaration of Conformity................................................................................................................... 144
IX.5 UK Declaration of Conformity............................................................................................................. 145
XTechnical data.............................................................................................................................................. 146
X.1 Main unit ............................................................................................................................................. 146
X.2 Cabinet................................................................................................................................................ 148
XI Annex............................................................................................................................................................ 149
XI.1 Connection of MUX OUT and AMP IN............................................................................................... 149
XI.2 National Instruments hardening guide ............................................................................................... 150
XI.2.1 Introduction............................................................................................................................ 150
XI.2.2 Step-by-step guide................................................................................................................ 150
XI.2.3 Service description................................................................................................................ 151
XI.3 Old enclosure models......................................................................................................................... 152
XI.3.1 Wall mounted instrument ...................................................................................................... 152
XI.3.2 Desktop enclosure ................................................................................................................ 154
XI.3.3 Outdoor cabinets................................................................................................................... 156
XI.4 Scale drawings ................................................................................................................................... 157
XII Index ............................................................................................................................................................. 165

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I General
I.1 About this manual
This manual describes the hardware, software,and usage of the ICMmonitor in its current version. Some of
the hardware features of the most recent versions are not available with earlier versions of the instrument. It
is possible to upgrade most of the previous instruments to the features of the current instruments. Please
contact Power Diagnostix for details.
Software updates are available through Power Diagnostix's web site (www.pdix.com). The access to the
download area of that web site is password protected and requires a valid software maintenance contract.
Contact Power Diagnostix for details. Current brochures and revisions of this manual are available for down-
load (PDF format) on that web site as well.
This manual describes the ICMmonitor including its miscellaneous functions. Some of these functions have
to be ordered separately and are marked as optional functions. For information regarding the accessories
and special applications of the ICMmonitor please contact Power Diagnostix.
I.2 Instrument safety
Before using the ICMmonitor, read the following safety information and this manual carefully. In particular,
read and follow the information, which is marked with the words 'Warning' and 'Caution'. The word 'Warning'
is reserved for conditions and actions that pose hazards to the user, while the word 'Caution' is reserved for
conditions and actions that may damage the instrument or its accessories, or that may lead to malfunction.
Always obey the safety rules given with the warnings and in this section. Make sure to take care of the safety
issues while performing field measurements. Never disregard safety considerations even under time con-
straints found often with on-line and off-line test on site.
Warning:
•Always provide solid grounding of the instrument and the coupling units. Never operate the
instrument without protective grounding.
•Use isolation techniques, such as isolation transformers or fibre optic isolation to avoid haz-
ard and injury. With applications bearing a high risk of electrical shock or breakdown use fi-
bre optic isolation in general.
•Avoid working alone.
•Do not allow the instrument to be used if it is damaged or its safety is impaired.
•Inspect the ground leads and signal cables for continuity.
•Select the proper coupling circuit and connection for your application.
•Do not use the instrument in an environment that is at risk of explosion.
!

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I.3 Battery module warnings
•This instrument may be provided with a battery module.
•Do not pierce, damage, disassemble, or modify the battery module. The battery module contains safety
and protection devices which, if tampered with, may cause the battery to generate heat, to rupture, or to
ignite.
•If a battery is suspected to be faulty, replace it with a Power Diagnostix approved battery module.
•If an instrument is suspected to contain a faulty battery module, the module must be removed before the
instrument is shipped.
•Do not ship a faulty battery module, either separately or connected to an instrument.
II Introduction
The ICMmonitor is a partial discharge analyser comprising a spectrum analyser, an acoustic detector, and a
conventional partial discharge (PD) monitor in one instrument. This combination enables PD measurements
even with a large background noise,e.g.,on power transformer within substations or power plants.
The ICMmonitor is an autonomous instrument, which can be used as stand-alone monitoring device. How-
ever, it is equipped with a serial computer interface for the download of trending data and remote access,
e.g.,by UMTS or LAN network (TCP/IP). The system can be adapted to utilise all commonly used types of
couplers and sensors. It offers a relay output to give a warning if a pre-set threshold level is exceeded.
The ICMmonitor is easy to use, where the user can choose between several display-modes of the integrated
LCD screen. All instrument settings including calibration are done via the optional functions on-screen men-
us or via software. These settings are automatically stored in a non-volatile memory when the system is shut
down.

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III Hardware
III.1 Models
III.1.1 Rack mountable versions
Figure
III.1: ⅔ 19-inch rack
Figure
III.2: Half 19-inch rack
Figure
III.3: Full 19-inch rack

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III.1.1.1 Front panel and external connections
Figure III.5 shows the front panel of the instrument as ⅔ 19-inch rack. The backlit liquid crystal display (LCD)
has a resolution of 240 x 128 pixels; the ten control buttons are arranged along the right-hand edge. The
brightness adjustment of the LCD is accessed using a small screwdriver, immediately beneath the control
buttons. A temperature deviation of the environment will be compensated by the device itself. For remote
control purposes a computer system can be connected via USB.
LAN: LAN Ethernet connector, RJ45, for connecting the ICMmonitor with external controlling systems.
USB: The USB terminal provides the connection to a PC for remote communications.
CH1 ... CH4: The input connectors of the 4-channel MUX can be connected to different PD sensors or cou-
pling units. The settings are changed in the menu SETUP3 / MUX.
Figure
III.5: Front panel of the ICMmonitor in a ⅔ 19-inch rack
Figure
III.4: Front panel of the ICMmonitor with IEC61850 option in a half 19-inch rack

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SYNC1 ... SYNC4: The SYNC connections are used for external synchronisation of each channel to the
frequency of the applied high voltage. This signal is usually derived from the coupling unit but can also be
taken from an extra voltage divider. The terminals can take voltages up to ~100 VRMS or ~200 Vpeak. If the
SYNC is not connected or the signal is too low, the ICMmonitor will synchronise on the mains supply fre-
quency (usually 50 or 60 Hz).
REC OUT: The REC OUT terminal of the ICMmonitor may optionally be connected to a paper recorder or
other device to provide a graph of the NQS value. The output gives 0 to 10 V with a R0= 100 Ω.
MUX OUT: When using the multiplexer the MUX OUT must be connected to the AMP IN either by a pream-
plifier or directly via a short BNC cable (see section X.1 "Connection of MUX OUT and AMP IN" on
page 149).
AMP IN: The AMP IN connector takes the PD signal either from
the MUX OUT (former AMP OUT) or directly from a PD source. Its
input impedance is about 50 Ωand has a sensitivity of <2 mV.
When using a preamplifier,the direction of the arrows engraved on
the RPA's must point toward AMP IN connector.
GATE IN: The GATE IN terminal can be used for noise rejection
during measurements. An additional RPA (usually RPA6G) is only
necessary with older versions of the ICMmonitor. The current ver-
sions come with an onboard integrated preamplifier. The unwanted
noise signal must be connected with the GATE IN.
REMOTE: The REMOTE terminal provides a direct serial connec-
tion to a PC for remote communications, using the serial cable
provided by Power Diagnostix. Alternatively,a TCP/IP interface
box can be connected.
IEC61850:Optional terminal for communication with the
ICMmonitor according to IEC 61850. See page 12.
X1: Power supply and alarm relay output
Caution: Make sure you know for what kind of voltage your device
is designed before connecting it to the power supply. The X1 con-
nector of the ICMmonitor DC version is only suitable for 12 to
26 VDC. Higher voltages can damage the instrument.
X2: Alarm relay output
: The case of the ICMmonitor must be connected to ground.
Caution: Preferably, the AMP IN is connected to the preamplifier. The supply voltage for the preamplifier may
damage the output circuit of the signal source. Be sure not to connect anything but the RPA to this terminal
or turn OFF the supply voltage. Only the SYNC IN terminal can take voltages up to ~200 Vpeak. Do not apply
any voltage to the REC OUT terminal (min. 100 Ωinput impedance).
X1.1 L
X1.2 N
X1.3 GND
IO.4 NC1
IO.5 COM1
IO.6 NO1
IO.7 NC2
IO.8 COM2
IO.9 NO2
Figure
III.6:
X1 connector for AC power
supply
Figure III.7:
X1 connector for DC power
supply
Figure
III.8:
X2 connector for alarm relay
output

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For a description and explanation of the left part of the rear panel, see above.
The panel's right part additionally provides:
MUX OUT: When using the multiplexer the MUX OUT must be connected to the AMP IN either by a pream-
plifier or directly via a short BNC cable (see section X.1 "Connection of MUX OUT and AMP IN" on
page 149).
X1: Alarm relay output
X2 (optional): Up to eight additional output signals of 4–20 mA or 0–
10 VDC can be provided for external monitoring purposes.
WLAN: Alternative to the LAN terminal for connecting controlling sys-
tems or a PC to the ICMmonitor.
: The case of the ICMmonitor must be connected to ground.
Figure III.9: Rear panel of ICMmonitor's 19-inch version with MUX8/8 and AUXOUT8 option
X2.1 NC1
X2.2 COM1
X2.3 NO1
X2.4 NC2
X2.5 COM2
X2.6 NO2
Figure
III.10: Connection block X2

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III.1.2 Enclosure for DIN rail mounting
For an explanation of the display and the push buttons, see page 3.
III.1.2.1 External connections
USB: The USB terminal provides the connection to a PC for remote commu-
nications.
X3 (optional): Up to six additional input signals of 4–20 mA can be measured and recorded.
X2:Alarm relay output (see Figure III.14 on page 8)
COM (DCG): Connector for a serial connection to a device communication
gateway DCG61850 for communication with the ICMmonitor according to
IEC 61850. See also page 12.
LAN: LAN Ethernet connector, RJ45, for connecting the ICMmonitor with
external controlling systems.
CH1 ... CH8: The input connectors of the 8-channel MUX can be connected
to different PD sensors or coupling units. The settings are changed in the
menu SETUP3 / MUX.
GATE IN: The GATE IN terminal can be used for noise rejection during measurements. An additional RPA
(usually RPA6G) is only necessary with older versions of the ICMmonitor. The current versions come with an
onboard integrated preamplifier. The unwanted noise signal must be connected with the GATE IN.
SYNC IN: The SYNC IN can be used for external synchronisation of the ICMmonitor to the frequency of the
applied high voltage. This signal is usually derived from the coupling unit but can also be taken from an extra
voltage divider. The terminal can take voltages up to ~100 VRMS or ~200 Vpeak. If the SYNC IN is not con-
nected or the signal is too low, the ICMmonitor will synchronise on the mains supply frequency (usually 50 or
60 Hz).
Figure
III.11: DIN rail version of the ICMmonitor
Figure
III.12: DCG61850

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MUX OUT: When using the multiplexer the MUX OUT must be connected to the AMP IN either by a pream-
plifier or directly via a short BNC cable (see section X.1 "Connection of MUX OUT and AMP IN" on
page 149).
AMP IN: The AMP IN connector takes the PD signal either from the MUX OUT (former AMP OUT) or directly
from a PD source. Its input impedance is about 50 Ωand has a sensitivity of <2 mV. When using a preampli-
fier,the direction of the arrows engraved on the RPA's must point toward AMP IN connector.
X1: Power supply
: The case of the ICMmonitor must be connected to ground.
X1.1 +
X1.2 -
X1.3 GND
Caution: The I/O is connector only suitable for 12–26 VDC. Higher voltag-
es can damage the instrument.
X2.1 NC1
X2.2 COM1
X2.3 NO1
X2.4 NC2
X2.5 COM2
X2.6 NO2
Figure
III.13: I/O connector X1
Figure
III.14: Connection block X2

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III.1.3 Explorer case
For a description and an explanation of this model's
panel, see page 3and 5.
Additionally,this panel provides a speaker in the
upper corner on the right-hand side.
Figure
III.16: Portable ICMmonitor in a robust Explorer case
Figure
III.15: Panel of the ICMmonitor in an Explorer case

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III.2 Cabinet
Power Diagnostix offers the ICMmonitor fitted in a stainless steel cabinet with following parameters:
Protection class: IP65
Corrosion proved
Screening grid
Pivoting centre section
Options: Heating installation or cooling system
Figure
III.17: ICMmonitor
with retrofitted MWS module in a stain-
less steel enclosure (PDMAR500)

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III.3 Options
The ICMmonitor can be equipped with several optional features to adapt the instrument for special acquisi-
tion tasks.
•MWS
Monitoring web server providing an Ethernet gateway for platform independent remote access to an
ICMmonitor instrument. The module is available for DIN rail mounting or as built-in plug-in card.
•MCI2
Additional module providing a mobile communication interface for remote access via UMTS.
•AUXOUT4/AUXOUT8
Up to eight additional output signals of 4–20 mA or 0–10 VDC (to be specified on order) can be provided
for external monitoring purposes.
X1 AUX 1 +
X2 AUX 1 –
X3 AUX 2 +
X4 AUX 2 –
X5 AUX 3 +
X6 AUX 3 –
X7 AUX 4 +
X8 AUX 4 –
X1 AUX 1 +
X2 AUX 1 –
X3 AUX 2 +
X4 AUX 2 –
X5 AUX 3 +
X6 AUX 3 –
X7 AUX 4 +
X8 AUX 4 –
X9 AUX 5 +
X10 AUX 5 –
X11 AUX 6 +
X12 AUX 6 –
X13 AUX 7 +
X14 AUX 7 –
X15 AUX 8 +
X16 AUX 8 –
Figure
III.18: AUXOUT
connector
for eight channels
Figure
III.19:
AUXOUT connect-
or for four channels

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•AUXIN4/AUXIN6/AUXIN8
Up to eight additional sensor signals of 4–20 mA or 0–10 VDC can be measured and recorded. These
AUX data are only accessible by the ICMmonitor software.
Caution: The AUX inputs may be solely connected with their designed
signal magnitude. Over-voltage (e.g., from the signal for the SYNC input)
might harm your instrument.
Only with the ICMmoni-
tor software it is possible to label and scale the AUX in-
puts. Figure III.21 shows the setup window where the
number of channels and the sort of input (4–20 mA or
0–10 V) have to be set according to the ordered instru-
ment. Within the main panel of the software the loaded
AUX values are displayed together with the PD trending
data. An export of these data is easily done to standard
data file formats.
•MUX8/MUX12
Eight or twelve input channels for PD and synchronisation signals.
•IEC61850
Hardware based protocol converter for IEC 61850 compliant communication,built-in or as additional
module (DCG61850).Instruments equipped with this option have an additional terminal for communica-
tion via LAN which can be used to transfer the following data:
NQS: Average discharge current; the unit depends on the unit setting for the charge value.
AppPaDsch: Apparent charge of partial discharge, peak level; this value is only available, if the meas-
uring mode of the corresponding channel is set to 'PD'.
PaDschAlm: Partial discharge alarm; this value is set if a pre-set limit of the Qp value is exceeded.
NQSAlm: NQS alarm; this value is set if a pre-set limit of the NQS value is exceeded.
X1 AUX 1 +
X2 AUX 1 –
X3 AUX 2 +
X4 AUX 2 –
X5 AUX 3 +
X6 AUX 3 –
X7 AUX 4 +
X8 AUX 4 –
Figure
III.20: AUXIN connector
Figure
III.21: Screenshot of the AUX input board

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III.4 Accessories
RPA1 Range: 40 kHz–800 kHz
The RPA1 is the standard preamplifier for measurements in the low frequen-
cy range according to standards such as the IEC 60270.
RPA1L Range: 40 kHz–20 MHz
The RPA1L is the standard preamplifier for measurements in higher frequen-
cy ranges.
RPA1H Range: 40 kHz–20 MHz
The RPA1H covers the same frequency ranges as the RPA1L but with lower
input sensitivity.
RPA2 Range: 2MHz–20 MHz
The RPA2 is a signal-conditioning amplifier that is designed to measure PD
in a frequency range higher than the range provided by the ICMmonitor itself.
Its basic function is to transfer the envelope of the high frequency signal
found in the range of 2–20M Hz into a frequency range that can be acquired
by the ICMmonitor in the AMP mode.
RPA6(G)
MODE 1: 40 kHz–800 kHz (10 kΩinput impedance)
MODE 2: 2 MHz–20 MHz (50 Ωinput impedance)
MODE 3: 200 MHz–600 MHz (50 Ωinput impedance)
The RPA6(G) is a signal-conditioning preamplifier with a demodulating loga-
rithmic transfer function covering 4.5 decades in one range. The remote con-
trol used with other preamplifiers to control the gain setting is here used to
control three different frequency ranges. It is to be used for gating only
.
Please see also section IV.6.3.
Remark: With current versions of the ICMmonitor the pre-amplifier RPA6
is
no longer built in. The onboard integrated RPA6G is used instead. It offers a
range of 100kHz–10 MHz (1 kΩinput impedance).

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FCU2 Range: 100 MHz–1800 MHz
The FCU2 is an ultra-wide band frequency converter unit. It is mainly used for
GIS monitoring. It is designed to withstand high voltage transients for most
applications, however in some cases it might be necessary to increase the
input protection by an IPU2
IPU2
The protection unit IPU2 is designed to avoid damage of the FCU2 input
stage under the presence of very strong transient signals.
AS75I
Range: 30–120 kHz acoustic sensor
The AS 75I is an active sensor with very high sensitivity for measurements on
GIS, transformer tanks, or cable joints. They come with a built-in 40 dB pre-
amplifier and can be connected to the RPA1D or directly to the ICMmonitor.
RPA: The output arrow engraved on the RPA (preamplifier) must be connected towards the AMP IN
connection. The input arrow of the RPA must be connected to the signal source via the MUX. It is also
possible to place the RPA external, before the MUX for e.g., feeding long signal cables.