Iriss Sonus PD Pro User manual

Sonus PD Pro
Operating Manual

22020 Sonus PD Alert Operating Manual
Contents
The Sonus PD Pro� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 6
Partial Discharge � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 6
Radiated Energy 6
Electromagnetic Radiation 7
Acoustic Radiation 7
Physical Dimensions of Sonus PD Pro � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 7
Dimensions 7
Weight 7
Power Supply 7
Temperature 7
Relative Humidity 7
IP Rating 8
CE Compliance � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 8
The Sonus PD Pro Kit List � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 8
General Substation Safety Precautions � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 8
Access 9
Visual Inspection of Substation 9
Environmental Protection � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 9
The Sonus PD Pro Overview � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 9
The Sonus PD Pro Outline 9
Sonus PD Pro Input/Output 10
Transient Earth Voltage (TEV)� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 10
Capacitive Coupler Sensor 11
Specication 11

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2020 Sonus PD Alert Operating Manual
Acoustic Emission (AE) � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 11
Surface Tracking 11
Acoustic Sensor 11
Specication 11
Operational Control � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 12
Control Buttons 12
Power 12
Battery level 12
Operating Modes 12
Mode Selection 12
TEV Mode 13
TEV Noise Detection 13
AE Mode 13
HFCT Mode 14
PD Detection Using HFCT 14
UHF Mode 15
PD Detection Using UHF Sensor 16
Display � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 16
Level Display 16
Live PRPD Display 17
Synchronisation 17
Persistent PRPD Mode 17
Sonus PD Pro App 18
Synchronisation Indication 18
Check Sonus PD Pro Function� � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 19
Function Tester 19

42020 Sonus PD Alert Operating Manual
Check The TEV Function 19
Check The AE Function 20
Surveying Switchgear Panels for PD - TEV � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 21
Step 1- Check TEV Activity Levels 21
Example 1 – Component Switchgear 21
Example 2 – Fully Enclosed Switchgear 22
Step 2 – Verify Whether Detected Activity is Noise or PD 22
Surveying Switchgear Panels for PD - Acoustic � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 22
Step 1- Check Acoustic Activity Levels 22
Appendix A: The Relationship Between PD and Criticality � � � � � � � � � � � � � � � � � � � � � � � � � � � � � 24
Criticality 24
Partial Discharge 24

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2020 Sonus PD Alert Operating Manual
IRISS Inc.
10306 Technology Terrace
Bradenton, FL 34211
Phone: [phone]
E-mail: [email protected]
Web: www.iriss.com
© 2021 IRISS Inc. All rights reserved
The contents of this manual are copyrighted property. Duplication and distribution in any form, particularly reprinting,
photographic, mechanical or electronic reproduction, or in the form of storage in data processing systems or data networks, is
prohibited without the consent of the copyright holder.
Revision:1.0,Date:01-01-2021Subjecttotechnicalmodications!

62020 Sonus PD Alert Operating Manual
The Sonus PD Pro
Partial Discharge
Partial Discharge (PD) is an electrical discharge that does not completely bridge the space between two conducting electrodes. The
dischargemaybeinagaslledvoidinasolidinsulatingmaterial,inagasbubbleinaliquidinsulatororaroundanelectrodeinagas.
When partial discharge occurs in a gas, it is usually known as corona.
Partial discharge is generally accepted as the predominant cause of long-term degradation and eventual failure of electrical
insulation.Asaresult,itsmeasurementisstandardaspartofthefactorytestingofmosttypesofhighvoltageequipment.In-service
monitoringofequipmentforPDgivesanadvancewarningofpendinginsulationfailure.Thisallowsaplantoperatortotakeremedial
action during planned outages.
Partial discharge often occurs under normal working conditions, gradually deteriorating the dielectric until it can no longer withstand
theelectricalstressandfails.BydetectingthisPDactivitywhiletheequipmentisinoperation,failurecanbeavoided.
The Sonus PD Pro is a partial discharge (PD) detection instrument
designed for use both in distribution voltage substations and
EHV Switchyards. It enables Network Operators to carry out
routine tests that will identify discharge activity in switchgear
(AIS and GIS), cables and high voltage accessories.
The battery-powered portable device has a live display that
shows a quantied level of PD activity. A colour-coded trafc
light system indicates when detected levels exceed the pre-
set thresholds. The Sonus PD Pro has a built-in TEV sensor for
the detection of internal discharge in switchgear and a built-
in ultrasonic sensor for detection of surface discharge and
tracking.
The Sonus PD Pro also supports external HFCT Sensors for
detection of cable PD and UHF sensors for detection of PD in
GIS and EHV termination.
Headphones are also supplied to help the user when working in
noisy environments.
The Sonus PD Pro is supplied with a battery-operated Function
Tester that should be used to verify the correct operation of the
instrument before use.
The Sonus PD Pro is a non-intrusive test device, therefore, PD
canbeidentiedandlocatedwhilsttheequipmentremainslive.
A PD event will radiate energy in different forms and this energy can be picked up and measured by the Sonus PD Pro.
Radiated Energy

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2020 Sonus PD Alert Operating Manual
PD creates EM radiation that dissipates in all directions away from the source. Metal components, for instance, the panels around
switchgear, will pick up this radiation and small voltages called Transient Earth Voltages (TEVs) are induced on the surface. These
veryhigh-frequencysignalswillbepickedupbytheSonusPDProandindicatethatthereisaPDsourcenearby.
Electromagnetic Radiation
PartialDischargealsogeneratesacousticenergyacrossawidebandoffrequencies.Thisacousticenergycanbedetectedinthe
ultrasonic range when there is a ‘line of sight’ between the PD source and the detecting sensor. Sharp points, for instance on air-
insulated cable terminations, are typical sources of discharge that will produce acoustic emission. Cast insulators are prone to
surface tracking, particularly when dirty or wet, where electrical stress across the insulator’s surface causes discharge, and
deterioratestheinsulatorsurfaceandcreatescarbontracks.Thiscanleadtoashoverandfailureoftheequipment.
Acoustic Radiation
Physical Dimensions of Sonus PD Pro
Dimensions
The Sonus PD Pro has the following external dimensions excluding attachments and aerials:
• Width: 190 mm
• Height: 90 mm
• Depth: 65 mm
The Sonus PD Pro weighs 220g.
Weight
The Sonus PD Pro has a built-in Lithium-Ion battery allowing for long battery life. A battery charger and car charger are included in
the kit.
Power Supply
Test Situation Est. Battery Life
Sonus PD Pro Only 8 hours
Sonus PD Pro with App 6 hours
Table 1: Battery Life Estimate
Temperature
The Sonus PD Pro can be used in the following temperature ranges:
• Operation: -20°C to +60°C
• Storage: -20°C to +75°C
Relative Humidity
The Sonus PD Pro can be installed in the following relative humidity ranges:
• Operation: 0% to 95%

82020 Sonus PD Alert Operating Manual
IP Rating
The Sonus PD Pro is IP54 rated but is not intended for use in damp conditions.
CE Compliance
The Sonus PD Pro complies with the following directives:
EN 61000-6-2: 2005 IMMUNITY STANDARD (INDUSTRIAL ENVIRONMENT)
EN 61000-6-3: 2007 EMISSION STANDARD (RESIDENTIAL, COMMERCIAL and LIGHT INDUSTRY ENVIRONMENT)
The Sonus PD Pro Kit List
The Sonus PD Pro Kit includes:
• 1x Sonus PD Pro
• 1x Sonus PD Pro power supply/
charger unit
• 1x USB Charger Cable
• 1x Car Charging Adapter
• 1x Stereo Headphone with 3.5mm
Jack
• 1x PD-FT Function Tester
• 1x Moulded carry case
• 1x Sonus PD Pro Companion App
Manual
General Substation Safety Precautions
Before setting up the Sonus PD Pro in the substation it is important for the user to read and understand the
following general safety information.
The engineer should obey the plant owner’s High Voltage safety rules at all times. The following safety rules
whichareparticulartotheSonusPDProequipmentshouldbeappliedinadditiontotheexistingsafetyrules,
whicharerequiredbytheplantowner.GeneralsafetyrulesfortheuseoftheSonusPDProareasfollows:
1. Avoid working alone.
2. OnlyaccreditedpersonnelwithappropriateHealthandSafetyTrainingshouldusetheequipment.
3. Donotusetheequipmentifitisdamaged,oritssafetyisimpairedinanyway.
4. TheUsershouldhavereadandunderstoodtheappropriateequipmentmanuals.
5. Always select the appropriate sensor and sensor connection for the application.
6. Theinstrumenthasbeendesignedforuseonlyontheearthed,outersurfacesofmetal-cladequipmentandearthedconnections
of cables/switchgear. The Sonus PD Pro or PD sensors should never be connected to, or put near, any high voltage components.
7. Never disconnect or loosen an earth connection in order to install a PD sensor
8. Cables connecting PD sensors to the instrument do not provide protection against high voltage.
9. Always maintain Safety Distances between the instrument, PD sensors, the operator, and any high voltage components.
10. Donotdisturborinterferewiththehighvoltageequipmentinanyway.
11. The User should wear sensible and appropriate PPE and clothing when in the substation.
Optional sensors supplied separately
• 1x HFCT sensor for Cable PD
• 1x UHF sensor for GIS PD
• 1x Ultrasonic Parabolic Dish
• 1x AA Ultrasonic Probe
Figure 1: PD Detector kit

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2020 Sonus PD Alert Operating Manual
Access
The Test Engineer shall only enter the customer’s switchyard or substation after they have received permission from an Authorised
Personappointedbytheplantownerandhavetherelevanttrainingand/orcertication.
Visual Inspection of Substation
On entry to the test area, a visual inspection of the area should be carried outby the Test Engineer(s). This should enable the operator
toidentifyanypotentialhazardsintheareaandtoassessboththetypeofequipmenttobetestedandthemethodofdoingso,for
instance, Switchgear using CC or AA sensors or Cables using HFCT sensors. Only when this visual inspection has been completed
shouldtestequipmentbeused.
Environmental Protection
This product contains general electronic components that may be environmentally harmful if improperly
disposed of. Please use correct disposal methods in accordance with local regulations.
The device can be returned to IRISS at the end of use for proper disposal.
The Sonus PD Pro Overview
The Sonus PD Pro Outline
The Sonus PD Pro has a tough ABS enclosure with rubber
protective covering around the built in TEV and ultrasonic PD
sensors. Both built-in sensors are mounted at the front of the
instrument so that they can be easily directed at the inspection
point.
The Sonus PD Pro can also be used with external PD sensors.
The Sonus PD Pro is controlled with three membrane switches
on the front panel. When used in standalone mode, an OLED
screen displays both text and graphical information to the user.
When connected to a mobile device running the Sonus PD Pro
App, all information is displayed on the App. The Sonus PD Pro
also has an audio output through both a built-in speaker and
pluggable earphones.
The unit is powered by a lithium-ion battery giving a long life for
hours of use. The software has intelligent power management
prolonging battery life.

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Sonus PD Pro Input/Output
The Sonus PD Pro has inputs and outputs as detailed in the tables below:
Front Panel Type
Display OLED
Display 6 x PD level LEDs
Control button MODE Membrane switch
Control button DISPLAY SELECT Membrane switch
ON/OFF button Membrane switch
PD Detector Only
Earphone socket 3.5mm Jack
External AE sensor 3.5mm Jack
UHF/HFCT/Power charge port 2.1mm DC power
PD Detector Only
Bluetooth module Bluetooth 4.0 LE
Table 2: Sonus PD Pro Input/Output
Transient Earth Voltage (TEV)
Partial discharge activity inside a metal-clad high voltage plant induces small voltage impulses called Transient Earth Voltages on
thesurfaceofthemetalcladding.TheseTEVstravelaroundthecladdingsurfacetotheoutsideoftheequipmentwheretheycanbe
picked up using capacitively coupled transducers.
The TEV signals will not pass through the metal panels but instead emerge at the joins between the metal panels and it is at these
points that the highest readings are generally detected.
Figure 2: PD pulse propagation in AIS panels