Frankfurt (Germany), 6-9 June 2011 SINGH– US – Session 1 – 0952 Dry-type Transformer for Pole...

Frankfurt (Germany), 6-9 June 2011

SINGH– US – Session 1 – 0952

Dry-type Transformer for Pole Mounted Application


ABB dry-type transformers Market and technology leader,

providing three complementing

technologies from 60 kVA to 63 MVA up to 72.5 kV and with on-load tap changer

More than 35 years experience

Proprietary technology and R&D departments

RESIBLOC®

Vacuum cast coil

Open wound


Our value proposition – Dry TransformersSafety – reliability – low losses

Safety for people and property - no fire hazard or explosion risk Hundred thousand-fold proven Intrinsically environmental-safe

New high-tech product line for ultra-efficient dry-type transformers: “EcoDry”

New 72.5 kV voltage class dry-type transformer for ultimate safety

New IP00 pole mount dry-type transformer PoleDry for avoiding soil contamination and copper theft -


Dry pole mount transformerThe motivation for the development Risks for oil leakage, theft and related soil

contamination Not attractive for copper theft Safety for people and environment Suitable for water and environment protection

areas Compact transformer, with comparable

dimension and weight as oil-filled Pole mounts


Dry-type IP00 pole mount 100kVA / 15 kV

VCC coils, realized with cycloaliphatic epoxy for outdoor applications

Solid insulation between HV and LV

Integrated bushings and off-load taps

Stacked core with corrosion protection

Used advanced simulation tools to realize dielectric design

Integrated bushingsmould design

Advanced dielectric simulations


Testing- Routine Dielectric

Results Dimensions (LxWxH): mm

1200 x 613 x 1198

Lightning impulse/ AC 95kV

Passed

AC Withstand 38kV Passed

Sound power level 53 dB(A)

PD-level (@ 130% nominal voltage)

<10 pC (after pre-stressing to

200%)

Temperature rise +45°C (25°C ambient)

NEW!


Core corrosion resistance

All structural steel part are made of stainless steel or Aluminum with no welding joint.

1000 hrs. of corrosion test for magnetic steel (stacked core samples)

Standards used DY991 and DY2101

Stacked core samples after 1000hrs. of salt fog testing (a) reference, uncoated sample (b) successful, coated sample.

(a)

(b)


Testing- Accelerated Aging- Salt fog Chamber

Test Voltage [U/Uo, kVrms] [Uo=8.7 kVrms]

Total Ageing Time [Hours]

1.03 160

1.5 378

1.8 303


Testing- Outdoor- KIPTS

The installation is placed around 30 m from the Atlantic Ocean in Western Cape of South Africa

Almost one year of energized PoleDry transformer confirmed robustness of materials and design

Energized Dry Pole mount transformer in South Africa


Conclusions Dry-type transformer for pole

mount application without enclosure

Increases safety and avoids oil or copper theft

Complies with IEC 60076-11 Solid insulation between HV and

LV, cycloaliphatic outdoor epoxy Corrosion resistant coating for core Dielectric simulations confirm the

internal and external design Lab and outdoor testing show

superior performance under extreme environments

3D-drawing showing single pole installation (from HV side) of PoleDry with HV- Delta connection.

Frankfurt (Germany), 6-9 June 2011 SINGH– US – Session 1 – 0952 Dry-type Transformer for Pole...

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Transcript of Frankfurt (Germany), 6-9 June 2011 SINGH– US – Session 1 – 0952 Dry-type Transformer for Pole...