abb pttr spain zaragoza. the product: cast coil …file/estfo_the+product_040408.pdfa b b b a t r a...

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Zaragoza.The product:Cast coil transformers

ABB PTTR SPAIN

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INTRODUCTION

Dry Type Vacuum Cast CoilTransformer

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-Product Portfolio II

Dry Type Vacuum Cast Coil transformer

� 50kVA to 30 MVA

� High Voltage up to 52 kV

� Classes E2, C2, F1

� Partial discharges lower than 10 pC

� Insulation system temperature: 155ºC (F)

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-Product Portfolio I

Special Transformers

� For industrial applications with semiconductor converter

� Stationary transformers for traction systems

� For marine applications

� For windmill applications

� Single phase transformers

� Excitation transformers

� Low voltage higher than 1,1 kV

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-Vacuum Cast Coil Main Advantages� Reduced environmental contamination

� No fire hazard

� Maintenance-free

� Great resistance to short circuits

� Great capacity to support overloads

� Great performance towards seismic phenomena

� Suited for damp and / or contaminated areas

� Cuts cost on civil installation works and due to particular design they can be repaired on site

� Self-extinguishing

� In the event of a breakdown there is no risk of leakage of flammable and / or contaminating substances

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Vacuum Cast Range


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-Standard Technical Features - SCC

SCC. Small cast Coil

� Standards CE/IEC 60726, CENELEC HD 464, UNE 20-178, DIN 42563

� Rated Power up to 2,5 MVA

� Rated voltage up to 36 kV

� Cooling AN

� Protection degree IP00

� HV winding Encapsulated, Aluminium foil

� LV winding Prepreg layer between turns, Aluminium full width

� Temperature rise 100 k

� Insulation system temperature 155 ºC (Class F)

� Partial discharges < 10 pC

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-Standard Technical Features - LCC

LCC. Large cast Coil

� Standards CE/IEC 60726, CENELEC HD 464, UNE 20-178, DIN 42563

� Rated Power up to 30 MVA

� Rated voltage up to 52 kV

� Cooling AN

� Protection degree IP00

� HV winding Encapsulated, Aluminium foil

� LV winding Prepreg layer between turns, Aluminium full width

� Temperature rise 100 k

� Insulation system temperature 155 ºC (Class F)

� Partial discharges < 10 pC

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Technical Features


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Standard Technical Features I

Insulation levels according to IEC 726

BIL List 1 BIL List 2F.I.kV ef

310202838507095

2040607595

145

40607595

125170250

UM

1,13,67,212

17,5243652

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Special Technical Features II

� Environmental: E2 environmental class certificate in accordance with CENELEC and UNE standards

� Climatic: C2 climatic class certificate in accordance with CENELEC and UNE standards

� Fire class: F1 burning behaviour certificate in accordance with CENELEC standards

Environmental, Climatic and Fire classEnvironmental, Climatic and Fire class

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Special Technical Features III

Magnetic core

� Mitered full length yoke

� Step-lap

� Low no-load losses

� Low no-load current

� Low noise level

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Special Technical Features IV

High voltage winding

� Aluminium foil

� Encapsulated cast resin

� Free of partial discharges

� High series capacitance

� Good impulse strength level

� High voltage endurance

� HV coil reinforced with fibreglass net

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Special Technical Features (HV winding) I

Fiberglass net, rigid type Fiberglass net, flexible type

HV Coil reinforced with fiberglass netHV Coil reinforced with fiberglass net

� Mechanical properties improved

� Superiority to withstand short circuit stresses

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Special Technical Features (HV winding) II

Al-sheet

Al-foil

Bottomyoke

Top yoke

Turninsulation

10

1110

950

ABB Foil Disk winding The connection between two consecutive foil disk is made

as pictures shows

The connection between two consecutive foil disk is made

as pictures shows

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Special Technical Features (HV winding) III

ABB Foil Disk winding

Insulating Space

In a foil disk winding design, the safety insulating space between critical turns is

easier to guarantee than in another winding design.

In a foil disk winding design, the safety insulating space between critical turns is

easier to guarantee than in another winding design.

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Special Technical Features I

Low voltage winding

� Aluminium full width

� Open wound

� Prepreg foil between turns

� High short circuit strength

� Dump resistant

� Cooling ducts

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Special Technical Features II

� Full length foil in Low Voltage windings: Axial component forces during SC are minimised

� Prepreg insulation between turns in Low Voltage winding : improved resistance to compression due to radial component forces during SC

Short Circuit Strength

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Special Technical Features III

Tap changer

� The high voltage winding is provided with taps to modify the rated voltage. The standard number of taps is 5 with a tapping range of ± 5%.

� Tap changing is carried out by means of removable links

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Special Technical Features IV

� Measured since 1983

� 100% transformers as a routine test

� Admissible values

� CENELEC HD-46420 pC

� IEC 60076-11(DRAFT 10pC)

� ABB average 5 pC

ABB TRAFO, S.A. MEASURED PD - 4th TERM '99

0

1

2

3

4

5

6

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8

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10

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12

1/10/9

95/1

0/99

8/10/9

914

/10/99

19/10

/9922

/10/99

26/10

/9928

/10/99

3/11/9

98/1

1/99

10/11

/9912

/11/99

16/11

/9918

/11/99

20/11

/9923

/11/99

25/11

/9926

/11/99

30/11

/992/1

2/99

4/12/9

910

/12/99

14/12

/9915

/12/99

17/12

/9921

/12/99

23/12

/9928

/12/99

29/12

/99

pC

Partial discharges

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Special Technical Features V

� Phase voltage uniformly distributed along the winding height

� Operation voltages lower than one tenth of corona inception voltage

Low dielectric ageing

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Accessories


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Standard accessories I

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Standard accessories II

T-119 temperature control device

� Indicator led

� PTC sensors

� Three input lines

� PTC/L1 for the alarm

� PTC/L2 for the trip

� PTC/Fan to activate fans

� Programmable fan time functions

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Standard accessories III

T-154 temperature control device and relay

� Digital display

� Pt100 sensors (one per phase for all functions)

� Other programmable functions

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Special Accessories IV

Available standard types:� IP 21

� IP 23

� IP 31

� IP 33

� and other types requested

Enclosures

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Special Accessories V

Set of fans for forced air cooling:

� Transformer capacity can be increased up to 140%

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Customising IV

� Dual primary/ secondary

� Insulation class up to 52kV

� 6 pulse rectifying transformer

� 12 pulses rectifying transformer (3 windings)

� HV/LV conductor in copper

� Electrostatic screen

� Encapsulated LV

� Current transformers

abb pttr spain zaragoza. the product: cast coil …file/estfo_the+product_040408.pdfa b b b a t r a...

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