Iriss Sonus PD Pro, Руководство по эксплуатации

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2020 Sonus PD Alert Operating Manual
Figure 8: HFCT around earth Figure 9: HFCT around core and earth
In HFCT mode, the screen shows the measured signal in pico-Coulombs (pC) for values between 0-999pC and in nano-Coulombs
for values between 1-7nC as shown in Figure 10.
Figure 10: HFCT screen display
In HFCT Mode, the Sonus PD Pro will detect HF signals that are from both PD sources and from noise sources. An algorithm
processes the detected signals and distinguishes between the PD and noise so that the level of each can be shown separately.
The magnitude of pulses recognised as PD are displayed in large text in the centre of the screen in pC/nC. The magnitude of pulses
recognised as noise are displayed on the right-hand side of the screen in pC/nC.
IMPORTANT
The HFCT signal cable does not provide electrical isolation for the HFCT. The HFCT sensor should therefore never be placed near
tohighvoltagecomponents,itshouldonlyeverbeplacedaroundfullyearthedcomponents.Neverdisconnectacableearthtofit
the HFCT sensor around it.
For the detection of PD in Gas Insulated Switchgear (GIS) the Sonus PD Pro can be used with a UHF PD Sensor. The UHF sensor
is connected to the instrument using the BNC-2.1mm Jack cable connected via the UHF power decoupler as shown in Figure 11.
UHF Mode
Figure 11: Sonus PD Pro connected to the UHF and power decoupler