Atec Tettex-MIDAS-288x Series User Manual download pdf

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

1 2 3 4 5 6