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WS & EFS1

Sensors

Power Diagnostix' external retrofit sensors for UHF monitoring of gas insulated switchgear (GIS) can be fitted fitted to the GIS at marginal cost and whilst the equipment is on-line.

AS75 & AS150

Sensors

The versatility of the Power Diagnostix line of PD detection equipment is due in large part to the range of accessories available for the ICMseries instruments. Each ICMseries data acquisition unit can be combined with different accessories to suit specific applications.

WS

Window Sensors

The versatility of the Power Diagnostix line of PD detection equipment is due in large part to the range of accessories available for the ICMseries instruments. Each ICMseries data acquisition unit can be combined with different accessories to suit specific applications.

AS75 & AS150

Acoustic Sensors

The versatility of the Power Diagnostix line of PD detection equipment is due in large part to the range of accessories available for the ICMseries instruments. Each ICMseries data acquisition unit can be combined with different accessories to suit specific applications.

External Retrofit UHF Sensors for GIS

Window Sensor WS80 / 95 / 140

External window sensors are used to conveniently equip older GIS with UHF monitoring. Power Diagnostix offers such window sensors of different sizes to fit the inspection windows of older GIS. Here, the obtained results with sensitivity are comparable to embedded sensors, if the window has a diameter of 80 mm or higher. In case well matched, such external window sensors offer a sensitivity of few pC.

External Flange Sensor EFS1

The external flange sensor EFS1 is a wide-band UHF antenna for PD detection on GIS and GIL. Since it is wrapped round the unshielded flange connection, the flange dimensions are required on order. With the N-connector it can be directly jointed with an UHF preamplifier like the UHF1, UHF2, or FCU2. Power Diagnostix offers to different models, for permanent and for temporary installation.

Ultrasonic PD Sensors

Acoustic Sensors AS75I and AS150I

The AS75I and AS150I are active sensors with very high sensitivity for measurements on GIS, transformer tanks, or cable joints. They come with a built-in 40 dB preamplifier and can be connected to the RPA1D, RPA1F, RPA1G, or directly to the AIAcompact, ICMsystem, ICMcompact, or ICMmonitor.

The sensor fixture SFX1 is suited to secure the acoustis sensors on a GIS. The magnetic sensor fixtures SFX2 are for temporarily mounting of the acoustic sensors on a transformer tank.

Sensor fixture SFX1
Sensor fixture SFX2

UHF Transformer Sensors

Valve Sensor TVS2 & Flange Sensor TFS1

UHF transformer sensors can be used to detect internal PD on power transformer in a frequency range between 300 MHz and 1 GHz. The UHF frequency range can be chosen under difficult on-site conditions, such as high impact of the measurements due to corona discharges or other disturbances within the typical HF range (100 kHz to 10 MHz). UHF sensors are suitable for retrofitting as well as for pre-installation. The sensitivity can be proven by injecting an impulse ge-nerator signal  in the UHF range into the system. UHF PD signals can be used for PD pattern analysis as well as for triggering acoustic measurement systems, like the FOS4, for instance. Power Diagnostix provides the TFS1 for valve flanges and the TVS2 for oil valves. Both sensors can be modified and designed in accordance of special customer specifications.

Transformer sensors TVS2 and FS1

Cable Sensors

Differential Foil Sensor DFS1

Besides the embedded coaxial sensor of cable accessories, external sensors can be applied to joints and terminations. Especially on cross-bonding joints differential foil sensors serve to capture partial discharge signals in elevated frequencies. Such foil sensors can be permanently installed for monitoring or temporary applied for survey type measurements.

Differential Foil Sensor DFS1