Atec Tettex-MIDAS-288x Series - Manual

C
Haefely has a policy of continuous product improvement. Therefore we reserve the right to change design and specification without notice. LL_MIDAS288x_0711_LW - 1/6
a brand of
Haefely is a subsidiary
of Hubbell Incorporated.
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