AIA Compact-Partial discharge detector

Description

AIA compact can be equipped with circuits for UHF measurements.The instrument is fitted with a battery pack for independent operation up to 3 hours and adapts to a variety of piezo-electric acoustic sensors and is supplied with a versatile sensor fixture. Additionally, the AIAcompact allows partial discharge measurements on external UHF sensors.Acoustic partial discharge measurements can be easily applied on gas-insulated switchgear and other high voltage equipment without the need of interrupting the operation.

UHF measurements on embedded or external sensors are possible with the use of the FCU2, a logarithmic frequency converter, which covers 100 MHz to 1800 MHz. As with the preamplifiers, the AIAcompact automatically detects the FCU2 and changes into the logarithmic display for the UHF detection. To protect the instrument’s hardware it is advisable to connect an input protection unit like IPU2B to the sensor’s output.

AIAcompact offers three display modes, which are selected using dedicated control buttons: SCOPE, METER, and TIME.

SCOPE

In SCOPE mode, the AIAcompact shows the phase-resolved partial discharge signal or pattern. Here, the ‘Freeze’ function allows keeping such a captured pattern for further evaluation or for taking screenshots.

METER

The METER mode offers four bar graph displays showing derived quantities of the captured activity. The graphs display the RMS and the peak PD level, as well as their 50 Hz (60 Hz) and 100 Hz (120 Hz) content. The instrument automatically synchronizes to the line frequency.

TIME

Within the TIME mode, the AIAcompact displays five or ten AC cycles triggered by a partial discharge event. Thus, this display shows the pattern of consecutive partial discharge events and, hence, offers a clear identification of bouncing particles and the severity of their activity.

AIAcompact Options

• AIAcompact software: All captured patterns and displays can be transferred to a notebook via an USB interface using the optional AIAcompact software. Optionally, the software allows acquisition of color PD patterns.
• Gating: Software controlled noise reduction for PD measurements in environments with high frequency disturbance.
• MUX: Built-in 4- or 12-channel multiplexer to split the PD signal and the voltage signal, with individual setup and calibration factor for each channel.

AIAcompact software offering easy-to-use acoustic partial discharge analysis of gas-insulated switchgear (GIS) and other high voltage equipment plus the optional analysis on embedded or external UHF sensors makes the AIAcompact the ideal solution for convenient in-service substation condition assessment.The AIAcompact combines the complimenting acoustical and electrical partial discharge detection for gas-insulated equipment in a lightweight and battery operated instrument. The measurement inputs provide the supply voltage for different preamplifiers  and acoustic sensors. It automatically selects the appropriate operation mode for each test setup. The AIAcompact  comes with a built-in display and can be operated via integrated push-buttons. Measurement data can be stored and transmitted to a laptop or PC for further analysis.

Standard PD test system:

• 1 x AIAcompact (opt. MUX4 or MUX12, gating)
• 1 x AIAcompact software
• 2 x Frequency converter unit FCU2
• 2 x Input protection unit IPU2
• 1 x Acoustic sensor AS75I incl. sensor fixture
• 1 x Disturbance antenna DA2
• 1 x Impulse calibrator CAL2B
• 1 x Set of cables