AIAcompact Portable acoustic insulation analyser
Power Diagnostix’s AIAcompact allows acoustic and UHF PD measurements for insulation assessment
Power Diagnostix’s AIAcompact allows acoustic and UHF PD measurements for insulation assessment
Description
Power Diagnostix’s AIAcompact portable acoustic insulation analyser has been designed for the acoustic and electric analysis of the insulation condition of high voltage assets, such as:
Gas-insulated switchgears (GIS)
Gas-insulated lines (GIL)
Power transformers
Distribution transformers
Cable accessories
To be suitable for all these applications, the instrument adapts to a variety of piezoelectric acoustic sensors and pre-processing units. It can be used with acoustic sensors and external ultra-high frequency sensors as well as embedded UHF sensors of the tested asset.
The AIAcompact has a built-in liquid crystal display (LCD) and is controlled by two columns of buttons. The function of the left column is indicated with the LCD (soft keys), while the right column has fixed assigned functions. The instrument is designed as a portable standalone detector,; however, it is equipped with a USB interface so it can connect to a computer and be remotely controlled using the optional AIAcompact software. This, software also enables you to acquire coloured partial discharge patterns as well as report and save screen-shots.,
Every AIAcompact comes with a built-in four-channel multiplexer, which enables you to switch between four input channels. Additionally, the buttons on the panel of the instrument enable you to directly select one of the four signal sources. As a result, the partial discharge signal and the voltage signal are split and can be selected separately. All settings, e.g., such as the input and display modes, are stored individually for each channel.
Standard features include:
Built-in four-channel multiplexer
External infrared synchronisation box IRS1B
Analogue gating for capturing disturbance signals via an external signal processing unit
Output for the connection of a paper recorder or similar instrument
Built-in speaker for the audible indication of detected PD signals
Available in three different housing options
Four possible ways of synchronising the instrument
To receive software updates or user guides, please contact support.pdix@megger.com or call +49 241 74927. Please have your device serial number ready or state your reason for interest.
Frequently Asked Questions
Why are PD tests on gas-insulated switchgear and lines ( GIS/GIL) recommended?
Gas-insulated switchgear lines are of high importance for every grid: With high electric fields in comparatively small spaces, failure can lead to extensive damage and long outages. PD measurements with the AIAcompact can help to keep GIS/GIL units in service for longer through early identification of insulation defects, thereby preventing asset breakdowns and system failures.
What is the difference between acoustic and electric UHF PD measurements?
PD, due to free metal particles moving inside the chamber, loose contacts, floating potentials, or surface protrusions, causes electromagnetic waves in the ultra-high frequency (UHF) range, which propagate within the GIS/GIL structure. To detect the kinds of ‘“electric’” PD signals, UHF sensors can be attached to unshielded flanges or the surface of an inspection window. Alternatively, most modern GIS/GIL systems are manufactured with embedded UHF sensors. These sensors convert the electromagnetic wave of the PD to voltage, enabling the PD to be measured. Partial discharge activity also causes sound waves to propagate within the insulating SF6 gas and metallic structures of the GIS/GIL. Here, acoustic sensors are particularly useful at detecting the fault. They convert the sound wave of the PD to voltage, enabling the PD to be measured. Additionally, the AIAcompact reconverts the voltage to sound for an audible indication of detected PD signals via the built-in speaker or connected headphones.
What kind of information is useful to know before a PD measurement on GIS/GIL?
It is always useful to gather as much information as possible in advance. In particular, try to be informed about: The reason for testing The size of the GIS and its voltage level The results of previous measurements and maintenance, SAT/FAT… The types of embedded sensors and their connector types The availability of unshielded flanges The size of windows (window diameter, pitch circle diameter, screw size) The age of the components to be tested
What kind of accessories are available for PD measurements on GIS/GIL?
Power Diagnostix offers a broad range of PD sensors, cables, and other accessories to cover most of the possible testing situations with a GIS/GIL system. Please refer to Power Diagnostix’s accessories catalogue for further information.
