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High Voltage

Technical Services

www.silcar.com.au

High voltage testing

Commissioning and maintenance of transmission

Generation

Distribution

Mining and process plant electrical equipment switchboards

Transformers

Generators

Motors and associated electrical apparatus

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Silcar high voltage technical services utilises highly

skilled and trained technical staff to provide a wide

range of testing, commissioning and high voltagetest services Australia wide.

Silcar provide a wide range of testing, commissioning and high voltage test services

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Testing and commissioning services for

transmission, distribution, generation and

mining industries electrical infrastructure

Silcar provides commissioning and maintenance testing of protection relays

and schemes. We utilise highly skilled eld technical personnel using Doble and

Omicron secondary injection test equipment to provide:

3 Project management and commissioning of protection and control schemes

in new and existing sub stations

3 Factory Acceptance Testing of electrical switchboards (FAT)

3 Site Acceptance Testing of electrical ewitchboards (SAT)

3 Maintenance of existing protection schemes

3 Development of data setting les for numerical protection relays

3 Test plans, relay setting and relay logic les

3 Simulation testing of SCADA systems to ensure correct functions integrity

3 Development of quality Inspection Test Plans (ITPs).

Testing Capability

3 Protection relay programming and scheme testing

3 Protection relay maintenance

3 Secondary injection

3 Primary injection

3 Current transformer testing

3 Voltage transformer testing

3 Battery discharge testing

3 High voltage testing of switchboard apparatus

3 Ductor testing

3 Insulation resistance testing

3 Circuit breaker testing and commissioning

3 Metering equipment commissioning and testing

3 Scada interface testing

3 On Load measurement of current and voltage

3 Fault nding

3 Earth resistance testing

Silcar protection scheme testingand commissioning services

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Dielectric Loss Angle test (DLA)

The DLA test, also known as DDF, Doble, Power factor test, is used

to determine conditions of an insulation medium in a high voltage

apparatus.

Applications: transformers, current & voltage transformers,

bushings, generators, motors

and surge arrestors.

Silcar provides a specialist diagnostic high voltage testing capability.

Technical Services staff utilise specialised condition monitoring

and diagnostic equipment to quickly and accurately establish the

condition of HV plant. The range of available services and their

typical application is outlined below:

Frequency

Response

Analysis (FRA)

The FRA test system is designed to detect winding movements

resulting from shipping damage, or subjection to low impedance

through faults.

Applications: power transformers.

Partial Discharge test (PD)

Partial Discharge is an electrical discharge that occurs across

a portion of the insulation between two conducting electrodes,

without completely bridging the gap. Partial discharges can occur

in voids in solid insulation (paper, polymer), gas bubbles in liquid

insulation or around an electrode in a gas (corona).

PD testing is particularly important where HV plant has a high

criticality. This may be due to its age, historical failures or the

consequences of its failure (such as position in the network).

Applications: transformers, current and voltage transformers,

bushings, generators, motors, switchgear (SF6).

Frequency response analysis (FRA)

2MHz range amplitude

Frequency (hz 000s)

a2 - n RMS b2 - n RMS

5

0

-5

-10

-15

-20

-25

-30

0 200 400 600 800 1000 1200 1400 1600 1800 2000

Gain(db)

c2 - n RMS

Very Low Frequency (VLF)

high potential test

The VLF test focuses on high voltage cables, but can also be applied

to rotating machinery, transformers, arrestors and insulators.TheVLF high potential test is the only high potential test approved for

XLPE cables.

Silcar high voltage testing services

04 Silcar provide a wide range of testing, commissioning and high voltage test services

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Ring Flux test

The ring ux test can detect deep core lamination breakdown as well

as back core burning, which may not be detected by the ELCID test.

The core damage is represented by a localised heating of the core

laminations, which is then detected by thermography equipment.

Applications: generator stators

Recurrent Surge Oscillograph

(RSO) test

This test is most sensitive to inter-turn insulation faults, or shorted

turns on generator rotors. It can also be used to detect open circuits

and earth faults of the rotor windings.

Applications: generator and motor rotors

Thermography (detection tool)

Thermography will quickly locate hot spots and determine the

severity of the problem. Thermography is also particularly useful forinspecting indoor and outdoor components such as motor control

centres, substations, breaker panels, switchgear, transformers and

circuit breakers.

Applications: transformers, current and voltage transformers,

bushings, generators, motors, switchgear

DC Insulation Resistance (IR)

and Polarization Index (PI)

A megohmmeter (insulation resistance tester), is used to measure

the ohmic value of an insulator under a direct voltage of great

stability. The insulation resistance test is a non-destructive test and

can detect where insulation is satisfactory.

Applications: transformers, current and voltage transformers,

bushings, generators, motors, switchgear.

Transformer Ratio test

Transformer turns ratio measurements are best made with

specialised instruments that include detailed connection and

operating instructions. The measured turns ratio should be within

0.5% of the calculated turns ratio. Ratios outside this limit may be

the result of winding damage, which has shorted or opened some

winding turns.

Applications: transformers, current and voltage transformers

Winding Resistance test

Transformers are subject to vibration. Problems or faults occur

due to poor design, assembly, handing, poor environments,

overloading or poor maintenance. Measuring the resistance of the

windings assures the connections are correct and the resistance

measurements indicate there are no severe mismatches or opens.

Applications: transformers, current and voltage transformers,

bushings, generators, motors, switchgear (SF6).

Electromagnetic Core Imperfection

Detection (ELCID) test

The ELCID test was developed in the late 1970s by the Central

Electricity Generating Board (CEGB) in the UK to enable it to readily

test machines where a high power source for traditional ring ux test

was not available. Because of a large number of laminations and thin

insulation layers there is a high probability of insulation breakdown.

The fault currents induced can be large and cause excessive local

core heating. If not detected and repaired at an early stage, faults

can be catastrophic.

Applications: generators, motors

Pole A

Pole B

Flux Probe

Quadrature

Axis

Slot

Leakage

Flux

Air Gap (Rotor) Flux test

Flux monitoring via permanently mounted air gap ux probes is a

proven technology in synchronous machines to determine if turn-to-

turn shorts have occurred in the rotor winding. Flux measurements

are the most powerful means of monitoring the condition of rotor

windings on-line and can provide information on the integrity of

the rotor winding inter-turn insulation. This information is critical

in planning maintenance, explaining abnormal vibrations, and

verifying new and rewound rotor integrity.

Applications: generator rotors

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2012 UGL SP Ausnet Ringwood, Glenrowan and West

Melbourne Terminal Stations Victoria.

Testing and commissioning associated with 66kV CT replacement

program.

2012 UGL Verve Power Station WA.

Commissioning engineers to provide assistance with commissioning

of generator and transformer protection schemes.

2011 2012 Siemens Goonyella Terminal Substation Moranbah

Queensland.

120 KV terminal substation (green eld) pre-commission and

commission substation.

2012 2013 Siemens Woodside KGP Karratha, WA.

Pre-commissioning and commissioning of the substation 33kV GIS

replacement program.

2011 2012 Siemens Eraring Power Station.

Test & commissioning on generator/transformer protection upgrade.

2011 2012 Siemens Sino Iron Power Plant Cape Preston, WA.

Pre-commissioning and commissioning work at Sino Iron port substation.

2010 2011 Archer Zone Substation Darwin Darwin, NT.

66Kv to 11 KV zone substation (green eld) pre-commission and

commission substation.

2010 2011 Mortlake Power Station 500kV Switchyard

Mortlake, Victoria.

500kV switchgear and protection scheme commissioning.

2009 2010 Sino Iron Power Plant Cape Preston, WA.

220kV, 33kV, 11kV & 6.6kV switchgear and protection commissioning.

2008 TRUenergy Yallourn Power Station.

Generator stator re-wind. High voltage testing of stator winding duringthe outage. ELCID test before, during and after re-wind.

2007 Rowville Terminal Station.

333.3MVA 500/220kV single phase auto transformers congured as

YNa0d1. Full commissioning and testing.

2007 - Kalgoolie Nickel Smelter.

B Set furnace transformer change over full turn key operation.

Including all SAT and witness FAT, Alstom, Rocklea, Queensland.

2007 2009 Jeeralang Power Station Protection Upgrade

Jeeralang, Victoria.

7 x generator/transformer protection scheme commissioning.

2006 - 2007 Transend Package B Substation Project TAS.

4 x 110kV/22kV Substations switchgear, transformer and protection

commissioning

Major projects include

Silcar has been providing high voltage services since 2000. Projects include substation commissioning, maintenance of

transmission, distribution and process plant electrical infrastructure, and high voltage testing of transformers, generators,

motors and switchboards and associated apparatus.

Our activities include Factory Acceptance Testing and Site Acceptance Testing on site pre-commissioning, commissioning

and maintenance.

Major Silcar projects

Silcar provide a wide range of testing, commissioning and high voltage test services

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TRANSFORMERS

3 Frequency Response Analysis (FRA)

3 Dielectric Loss Angle (DLA) test on bushings and transformers

3 Insulation resistance test & polarisation index test

3 Winding resistance test

3 Winding ratio test

3 Impedance test

3 Applied voltage or AC high potential (Hi-pot) test

3 Induced voltage test

3 Surge arrestor watts loss test

3 Condition monitoring reports

3 Visual inspections

GENERATORS AND MOTORS

3 Dielectric Loss Angle (DLA) test

3 Partial Discharge test (PD)

3 Electromagnetic Core Imperfection Detection (ELCID) test

3 Winding resistance test

3 Impedance test

3 Recurrent Surge Oscillograph (RSO) test

3 Current spectrum analysis

3 Applied voltage or AC high potential (Hi-pot) test

3 Iron core loss test

3 Broken rotor bars (Induction Heater) test

3 Insulation resistance test

3 Polarisation index test

3 Air gap probe ux test

3 DC controlled over voltage test (step & continuous) also known

as step ramp test

3 Visual inspections

OTHER TESTS

3 Cable high potential (DC or VLF [very low frequency]) test

3 Instrumentation (functionality test and calibration)

3 Protection and metering testing

3 Primary injection

3 Energy measurement

3 Testing of operating equipment

3 Battery discharge testing

POWER TRANSFORMERS

3 Sweep Frequency Response Analysis (SFRA)

3 Dielectric Response Analysis (DIRANA)

3 Winding Dielectric Loss Angle (DLA)

3 HV Bushing DLA

3 Winding Insulation Resistance (IR)

3 Polarisation Index (PI)

3 Winding Resistance (through taps- HV)

3 Low voltage impedance

3 Low voltage induce

3 Low voltage no-load loss & load loss

3 Separate source

3 Single phase excitation (through taps)

3 Surge arrestors IR & DLA

3 Winding & oil temperature indicator calibration/check

3 Auxiliary controls

3 Visual inspection

3 Condition monitoring report

ROTATING MACHINES

Stator Core:

3 Inspection services

3 Core lamination tightness

3Thermography

3 Electromagnetic Core Imperfection Detector (ELCID)

3 Ring Flux (c/w Thermography)

Stator Winding

3 Insulation Resistance (IR)

3 Polarisation Index (PI)

3 Winding Dielectric Loss Angle (DLA) - power frequency up 25kV AC

3 Off - Line Partial Discharge (PD) - power frequency up to 25kV AC

3 DC resistance

3 DC Controlled Overvoltage (DCCO)

3 AC & DC Hi - Pot

Rotor Winding3 Recurrent Surge Oscillograph (RSO)

3 Off-line at stand still / speed

3 Air Gap Flux Probe - on line

3 Current Spectrum Analysis - on line

3 Residual magnetisms

3 Insulation Resistance (IR)

3 Polarisation

3 Resistance

3 Impedance

3 AC high potential

3 Pole balance

HIGH VOLTAGE CABLES3 Insulation resistance

3 AC high potential (Power Frequency & VLF)

3 DC high potential

3 Dielectric Loss Angle (DLA)

Silcar provides the following tests:

Silcar Services

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colemanstudios.c

om.a

u

National Office Victoria

25 37 Huntingdale Road

Burwood, Victoria, Australia 3125

P (03) 9273 7600 F (03) 9017 1424

Email enquiries@silcar.com.au

WA Perth Regional Office

Unit B, 2-10 Kewdale Road

Welshpool WA 6106

Telephone (08) 9351 7300

QLD Brisbane Office

Unit 1, 237 Fison Avenue West

Eagle Farm QLD 4099

Telephone (07) 3291 2433

High Voltage Technical Services Head Of fice

43 Saviges Road, Moe, Victoria, 3825

(PO Box 549)

P (03) 5122 4000

F (03) 9017 1444

www.silcar.com.au colemanstudios.com.au

Ownership

Silcars 50/50 shareholders are Siemens Ltd (a global leader in electricalengineering and electronics) and Thiess Pty Ltd (a leading integrated engineering

and services provider in Australasia and South East Asia).

Silcar Corporate Locations & Operations

With over 1,800 employees Australia-wide, Silcar services technically

complex assets using a nationally distributed support network to

ensure 24/7 maintenance support. Whether you require capital city

CBD site coverage, or cover for the remotest outback location, Silcar

can deliver your requirements.

Darwin

Cairns

Brisbane

Sydney

Hobart

Adelaide

Perth

Melbourne

Rockhampton

Silcar State Offices

Silcar Service Coverage

Canberra

New Caledonia