frankfurt (germany), 6-9 june 2011 singh– us – session 1 – 0952 dry-type transformer for pole...
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Frankfurt (Germany), 6-9 June 2011
SINGH– US – Session 1 – 0952
Dry-type Transformer for Pole Mounted Application
Frankfurt (Germany), 6-9 June 2011
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
Frankfurt (Germany), 6-9 June 2011
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 -
Frankfurt (Germany), 6-9 June 2011
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
Frankfurt (Germany), 6-9 June 2011
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
Frankfurt (Germany), 6-9 June 2011
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!
Frankfurt (Germany), 6-9 June 2011
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)
Frankfurt (Germany), 6-9 June 2011
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
Frankfurt (Germany), 6-9 June 2011
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
Frankfurt (Germany), 6-9 June 2011
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.