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MIDAS
Mobile Insulation Diagnosis & Analysing System
Periodic maintenance
and inspection of high
voltage insulation losses is
performed on power
transformers, bushings,
motors, generators, etc.
The MIDAS is a valuable tool
for such measurements
especially in the harsh
electrical environments
experienced in substations
and other field locations.
Designed for testing at local
power-line frequency (50Hz
or 60Hz), MIDAS
automatically measures and
records dissipation factor
(tan), power factor (cos)
and all other relevant values
of impedances (capacitive,
inductive and resistive).
Damage or changes in the
insulation material are
detected rapidly and reliably.
Furthermore the optional
build-in 3-phase Transformer
Turns Ratio Meter and/or
Frequency Response
Analyser help to detect faulty
transformer windings as well
as defective tap positions.
The rugged construction and large pneumatic wheels make
transportation and access to remote locations easy.
A large touch sensitive, sunlight readable colour display and
the graphical user interface create a highly visual
environment with clear illustration of the instrument’s
advanced measuring and analysing features.
Predefined test sequences linked with limiting values (e.g.
previous measurements) guide the user automatically
through the test sequence and allow obtaining a first
assessment result on-site.
Built-in standard interfaces (USB, Ethernet) enable easy data
exchange with a host computer for data collecting, reporting,
printouts, statistics and advanced analysis.
FEATURES
To analyze the condition and quality of high voltage
insulation, the system performs automated measurement of:
Dissipation Factor (tan ) and Power Factor (cos )
Short Circuit Impedance and Excitation Current
Additional measuring capabilities like Capacitance,
Quality Factor, Frequency, Voltage, Current, Power,
Losses, Impedance, Inductance, Reactance, Spectrum
Analyzer, Digital Scope and Data Logger
Frequency Response Analysis (optional; built-in or
external remote controlled unit)
Turns ratio, voltage ratio, phase displacement
(optional; built-in or external remote controlled unit)
Trending Analysis function – get a first graphical on-site
assessment
Manual and Automatic (Sequencer) test operation.
Built-in high voltage supply up to 15kV, 4kVA
Built-in, long-term stable standard capacitor
Rugged, reliable and safe construction
State-of-the-art integrated PC running actual Windows
platform with advanced user interface
BENEFITS
Shortest Measuring Time
Shortest equipment set-up and measuring time by an “all in
one” unit. High output power allows testing of biggest class
power transformers in shortest time.
Easy to operate
Self-explanatory user interface with a large graphical colour
TFT touch screen. Manual and Automatic test operation.
Software assisted test planning, preparation, execution and
first assessment.
Highest Accuracy
Highest accuracy in field-testing using latest measuring
techniques as well as highest long-term stability of system
accuracy by using a gas-insulated standard capacitor as
internal reference arm and self-calibrating measurement
sensors.
Advanced interference suppression
Advanced interference suppression (patented) allows
measurement at local power-line frequency as recommended
in the related standard IEEE/ANSI 57.12.90
a brand of
Haefely has a policy of continuous product improvement. Therefore we reserve the right t o change design and specification without notice. LL_MIDAS288x_0711_LW - 1/6
Haefely is a subsidiary
of Hubbell Incorporated.
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APPLICATIONS
Power Transformers
Distribution Transformers
Instrument Transformers
Rotating Machines
Liquid Insulation
Bushings
Cables
Capacitors
Circuit Breakers
Surge Arrestors
HANDY MECHANICAL DESIGN
Rugged construction and large pneumatic wheels are an
advantage for transportation in the back of a van and when
measurements must be made in remote hard to access
locations.
A powerful data management allows for an easy and
fast trending and comparison analysis. Condition Based
Maintenance gets a new quality.
The automatic report generator minimises the time to
complete the test procedure.
The integrated online help supports the user during the
test procedure.
EASY TO OPERATE
MIDAS software incorporates much of our and our
customers’ experiences in the test business. We designed a
very easy to operate and understand, self-explanatory
graphical user interface. Together with the large colour
display and the touch
screen you can handle
test planning,
preparation, execution
and first assessment
with just a fingertip. It
also means the test
equipment is sealed
against environmental
influences.
Large TFT display with
touch-screen interface
Test system packed in the back of a station wagon
Easy one-man transportation and loading with the
integrated handles. Another great feature of this all-in-onepiece design is the shortest measuring set-up time you
can get on the market.
LATEST TECHNOLOGY
The development is based on the latest measurement and
electronics technologies.
Conventional techniques like mechanical driven
compensation is replaced by real-time electronic
compensation. This is realized by using advanced high-
speed data bus technology and powerful software
algorithms.
Predefined test sequences for transformer, bushings,
generators, cables, etc. together with two measuring
inputs reduce set-up and test time and minimize wiring
and re-wiring errors.
An integrated PC running under embedded Windows
TM
gives you the most powerful tool in the field to
XP
make sure you get your maintenance job done fast and
accurate.
The large colour TFT sunlight readable display with
touch screen interface, designed for outdoor use
allows having a clear and easy presentation of all values,
settings and operations.
a brand of
MANUAL AND AUTOMATIC
The manual test mode provides quick measurements without
lots of definitions or pre-settings while the automatic tests in
“Sequence mode” provide complete automated test
sequences. This powerful software efficiently performs for
field-testing from set-up to sequence definition to automatic
operation to a first on-site assessment to the final report.
Haefely is a subsidiary
of Hubbell Incorporated.
Haefely has a policy of continuous product improvement. Therefore we reserve the right t o change design and specification without notice. LL_MIDAS288x_0711_LW - 2/6
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SEQUENCE MODE
Executable test sequences (step macros) can be defined
with
Set-ups: Set all configuration values, type of DUT,
insulation type, temperature correction function, limits,
work order, serial numbers, test personal, location, etc.
Test levels: Set the desired different test levels (voltage
and frequency).
Connections: Set the different connections (DUT wiring)
e.g. GSTg A+B.
Measuring values: Define the different values to be
recorded. E.g. Voltage, Frequency, PF, Current, Insulation
Temperature, PF@20°C, etc.
Test instructions: In every step that requires a rewiring
of the test object an instruction box with text and pictures
can be defined to provide the test personal with a step by
step guide of how to perform the connection, wiring and
the test.
Pass/fail levels: Limits can be set absolute or relative
(based on reference measurements) that will be compared
with the measured values and shown in the analysis
diagram.
All this can be done on the MIDAS itself or with the office
software package on a separate PC or laptop.
A predefined test sequence then can be performed by
lower skilled or educated personal. It reduces the set up
time in the field and also reduces failures due to lack of
knowledge, wrong connections or misinterpretation of
measuring values.
ANALYSIS FUNCTION
As an immediate on-site assessment you can compare the
latest measurements with stored data sets and see how the
insulation values have changed (trending), using the
analysis diagram. Also comparison of measurements
captured at different voltages and different frequencies can
be observed.
The ANALYSIS window with the list of stored measurements (top)
and the corresponding diagram window (bottom)
Both axis of the analysis diagram are free definable and the
collected sets of different measuring data can be sorted as
selected. So almost any dependency can be shown and
displayed.
If the Pass/Fail criteria are set they are shown in the
diagram as a green “Pass” band, a yellow “Attention”
band and a red “Failed” section. So you can immediately
identify a possible problem in your insulation.
The ANALYSIS diagram shows the trending and the limits.
HIGHEST ACCURACY
The pop-up test instruction window with a connection diagram
picture and below the corresponding instruction text
The Sequence mode is the perfect tool to repeat
maintenance measurements. If you have already done one
complete measurement you can reload it, perform an
identical test, collect the additional measurements and
display the new trending. As easy as that!
a brand of
Haefely has a policy of continuous product improvement. Therefore we reserve the right t o change design and specification without notice. LL_MIDAS288x_0711_LW - 3/6
Due to the technology used for this advanced test
equipment we reached the highest accuracy in the market.
The built-in reference is a standard gas capacitor,
developed in-house, proven over 60 years, used as a
calibration standard for high voltage laboratories and
metrology national institutes. This guarantees the highest
long-term stability unbeaten by any other reference
standard. Because of the design of our standard capacitor,
the stability and the accuracy is independent of the
temperature, air pressure and humidity of the environment
so there is no need for additional verification. It’s all built-in
already and all calibrations are done automatically as part
of the self-test at boot-up. That’s our interpretation of
“accuracy by design”.
Haefely is a subsidiary
of Hubbell Incorporated.
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ADVANCED INTERFERENCE SUPPRESSION
The built-in Adaptive Dynamic Noise Suppression (ADNS)
eliminates the external interferences from the measuring
signal.
With ADNS we have successfully developed an advanced
interference suppression method (patented) that allows
measurements at the real power-line frequency!
For environments polluted with highest noise the system
switches into a Extended Noise-Suppression mode to
measure stable and accurate values even in most difficult
locations.
WIDE RANGE OF APPLICATIONS
The built-in 15kV and 4kVA high voltage high power source
is unique. The 15kV output voltage (MIDAS 288xG) together
with the mobile resonating inductor 5289 allows the testing
of generators with 25kV nominal voltage according to IEC
60034.
The powerful supply and measuring capabilities make sure
that you can test even the biggest class of power
transformers in shortest time.
The optional add-ons “ Transformer Turns Ratio Meter” and
“Frequency Response Analyser” are important additional
diagnostic tools for power transformer diagnosis.
They can help to detect faulty transformer windings,
defective tap changer positions and mechanical failures and
displacements in the winding structure. For related technical
data see flyers TTR2795 and FRA5310.
Furthermore measurements can be carried out on solid
insulation such as cables, distribution-, voltage & currenttransformers, motors, bushings, capacitors, etc.
With the optional test cell 6835 all kinds of liquid insulation
samples can be tested as well.
TEMPERATURE CORRECTION
Built-in temperature correction curves for different insulation
materials are used to recalculate the measured results to
reference conditions (20°C, 68°F). The method of correction is
depending on the type of insulation and the relevant
standard, and the predefined set of curves can be easily
expanded or changed by the user.
a brand of
REPORTING AND DATA HANDLING
All measurement results and test object data are saved in
XML and CSV, which allow an easy transfer to database
applications, MS WordTM, MS ExcelTM, MS AccessTM,
MS PowerPointTM or even a simple text editor. Printing of
the test reports can be done directly or after transferring
the data to a PC using the Ethernet interface or a USB
memory stick.
CONDITION BASED MAINTENANCE
Gaining knowledge about asset (medium- and high voltage
equipment) performance from condition measurements
(e.g. tan values) with the help of a database and
experienced personal are essential for the implementation
of a risk strategy. Large-scale development of knowledge
rules to support decisions about asset endurance, is
possible with knowledge based platforms e.g. “ksandr”, a
mutually applied expert database, designed for the
collection of local condition measurements, generates
decision rules based upon a lager population than just the
local user. Membership to this non-profit, independent
organisation is open to all willing to share data and
experience regarding asset performance.
Component view screen for tan values in the iCore©
database of the “ksandr” platform which is supported by Delft
University of Technology. See also www.ksandr.org
Haefely is a subsidiary
of Hubbell Incorporated.
Haefely has a policy of continuous product improvement. Therefore we reserve the right t o change design and specification without notice. LL_MIDAS288x_0711_LW - 4/6
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TECHNICAL SPECIFICATIONS
Measuring Unit Range Resolution Accuracy
Dissipation Factor
tan
Power Factor
cos
Quality Factor 0.01 .. 10000 0.0001
Capacitance Range
@ 50Hz
Capacitance Range
@ 60Hz
Inductance Range
@ 50Hz
Inductance Range
@ 60Hz
Test Voltage
Test Current
Ref Current
Input Cn ext
30uA .. 15 A 0,1 uA
Input A & B
30uA .. 300 mA 0,1 uA
Test Frequency 15 .. 400 Hz 0.01 Hz
Apparent Power S
Real Power P
Reactive Power Q
Output Voltage 80 V .. 15 kV
Output Frequency 15 .. 400 Hz
Output Current 150 mA
Output Power
4000 VA
max
Output Power duration continuous 30 min. ON / 1h OFF 5 min. ON / 1h OFF 1 min. ON / 1h OFF
Output PD level
max
Internal Cn (Reference)
Input Power 100 .. 240 VAC, 50 / 60 Hz, 1kW, active PFC (IEC61000-3-2)
Operating Temperature -10 .. 50°C
Storage Temperature -20 .. 70°C
Relative Humidity 5 .. 95 % r.h.
Protection classes IP22, IEC 61010, CE mark, general IEC 61326-1,
Weight & Dimensions Instrument box 58 kg (174 lbs) 34 x 47 x 104 cm (13.5” x 18.5” x 41”)
Recorded Values
Interfaces (PC head 2880) USB, Ethernet, RS232, Mouse, Keyboard, Thermal printer
Data format XML, CSV
Calibration Interval 2 years recommended
Safety Specification VDE 0411/part 1a , IEC/EN 61010-1:2002
1 Accuracy valid @ 50..60Hz 2 Accuracy valid for voltage > 1000 V 3 Can be expanded with optional Resonating Inductor 4 Can be lowered with optional Current Booster
5 measured by external temperature/humidit y probe
0 .. 100
(0 .. 10’000%)
0 .. 1
(0 .. 100%)
3
6.5 pF .. 56 nF
8.1 pF .. 88 nF
1.2 nF .. 13 uF
3
5.4 pF .. 47 nF
6.8 pF .. 73 nF
1.0 nF .. 10.8uF
4
140 H .. 1600 kH
112 H .. 1280 kH
0.75 H .. 8.5 kH
4
117 H .. 1334 kH
93 H .. 1067 kH
0.62 H .. 7 kH
15 kV (12 kV)
@ 15kV
@ 12kV
@ 80V
@ 15kV
@ 12kV
@ 80V
@ 80V
@ 80V
@ 15kV
@ 12kV
@ 15kV
@ 12kV
0.0001
(0.01%)
0.0001
(0.01%)
0.01 pF
0.01 pF
0.1 mH
0.1 mH
1 V
0.5 % rdg 0.0001
( 0.5 % rdg 0.01%)
0.5 % rdg 0.0001
( 0.5 % rdg 0.01%)
0.5% rdg 0.0001
0.3 % rdg 0.3 pF
0.3 % rdg 0.3 pF
0.5 % rdg 0.5 mH
0.5 % rdg 0.5 mH
0.3 % rdg 1 V
0.3 % rdg 1 uA
0.3 % rdg 1 uA
0.1 % rdg 0.1 Hz
0.1 mVA
0.1 mW
0.1 mvar
MIDAS 288x
0.8 % rdg 1 mVA
0.8 % rdg 1 mW
0.8 % rdg 1 mvar
1 MVA
1 MW
1 Mvar
1500VA
MIDAS 288x G
Output power derating beyond 40..70Hz
continuous
1501 .. 2000VA 2001 .. 3000VA 3001 .. 4000VA
80 V .. 12 kV
, 450 mA
max 5min.
500 pC
100 pF, tan 0.00002, Capacitance constancy < 0.01% / year
Temperature coefficient < 0.01% / K
IEC 61000-4-X, 61000-3-X, EN 55011, ANSI/IEEE C37.90
PC head 7.5kg (17 lbs) 30 x 42 x 26 cm (12” x 16.5” x 10”)
Trolley 11kg (25 lbs) 33 x 68 x 112 cm (13” x 26.8” x 44”)
DF(tan), DF(tan)
PF%(cos)
, QF (quality factor), QF (quality factor)
@20°C
, DF%(tan), DF%(tan)
@20°C
, PF(cos), PF(cos)
@20°C
@20°C
CP (ZX= CP RP), RP (ZX= CP RP), CS (ZX= CS + RS), RS (ZX= CS + RS) ,
L
(ZX= LS + RS), RS (ZX= LS + RS), LP (ZX= LP RP), RP (ZX= LP RP),
S
Standard capacitor Cn, U
Admittance Yx, Frequency
Real Power @2.5kV, Real Power @10kV, Temperature
Rel.Humidity
5
, Temp.Corr.Factor K,
, U
RMS
, Frequency
Test
RMS
3, I
, I
Test eff
Line
, Im, I
Ref eff
, App. Power S, Real Power P, Reactive Power Q,
Impedance Zx, Phase-angle (Zx),
Fe,
5
Ambient
Connection mode, Settings, all Notes and Comments, Time, Date
@20°C
, Temperature
1
2
, PF%(cos),
Insulation
1
1
5
,
a brand of
Haefely has a policy of continuous product improvement. Therefore we reserve the right t o change design and specification without notice. LL_MIDAS288x_0711_LW - 5/6
Haefely is a subsidiary
of Hubbell Incorporated.
C
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SCOPE OF SUPPLY
MIDAS 2880 System with touch screen operated PC
head as system controller. Max. output voltage 12kV
MIDAS 2881 System with laptop as system
controller. Max. output voltage 12kV
MIDAS 2880G, MIDAS 2881G Systems as above
but with a maximum output voltage of 15kV.
Optimised solution for power generator testing.
MIDAS 2880 MIDAS 2881
Rugged cable case including:
HV supply cable
double shielded
20m with clamp
and hook, ground
cable 20m with
clamp, 3 shielded
Measuring cables
20m with clamps,
2 Mini clamps,
Safety switch with
cable 10m, USB
memory stick, Instruction manual and Test Certificate.
ACCESSORIES AND OPTIONS
MIDAS OFFICE Software. Can be used
for PC test preparation, data visualisation
and staff education
288x TEMP Laser infrared, contact-less
Thermo/Hygrometer. For determination of:
tank(oil) temperature, air temperature
and air humidity.
www.tettex.com
Europe, Asia, South & Central
America, Australia
Haefely Test AG
Birsstrasse 300
4052 Basel
Switzerland
+ 41 61 373 4111
+ 41 61 373 4912
sales@tettex.com
a brand of
China (Sales & Service Office)
Haefely Test AG – Beijing Office
8-1-602, Fortune Street
No. 67, Chaoyang Road, Chaoyang District
+ 86 10 8578 8099
+ 86 10 8578 9908
sales@haefely.com.cn
288x SAFE * Safety Strobe Light with
magnetic base for mounting e.g. on a
transformer tank, providing visual
warning of high voltage presence.
6835 Test cell for on-site
measurements on liquid insulation
samples.
5287 * Current Booster for inductance
testing, especially for short circuit
impedance testing of power
transformers acc. IEC60076 to diagnose
transformer winding deformation.
5289 * 15kV, 100kVA Automated
Resonating Inductor for testing high
capacitance values up to 1.56uF. E.g. for
testing of large power generator
windings.
5288A 10kV, 33kVA
Manual Resonating Inductor for testing
high capacitance values up to 1uF.
288x FRA * Built-in fully automated
frequency response analyser. Operated
via MIDAS system controller.
288x TTR * Built-in fully automated
three phase Turns Ratio Meter. Operated
via MIDAS system controller.
288x RACK Mechanical kit for 19” rack
mounting of MIDAS Instrument box.
288x CASE Additional
rugged field case for safe
transportation of MIDAS2880
or 2881.
* For these options the MIDAS unit needs additional interfaces built-in
the factor
Beijing, 100025
P. R. China
.
sales@hipotronics.com
Haefely is a subsidiary
of Hubbell Incorporated.
North America
Hipotronics Inc.
1650 Route 22
PO Box 414
Brewster, NY 10509
USA
+ 1 845 279 3644
+ 1 845 279 2467
Haefely has a policy of continuous product improvement. Therefore we reserve the right t o change design and specification without notice. LL_MIDAS288x_0711_LW - 6/6
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