Cast Resin Transformers

Cast Resin Transformers represent an alternative solution for electric power distribution in medium voltage applications.

Why Cast Resin Transformers?

Benefits

The advantages of cast resin transformers in comparison with the traditional oil-filled transformers are quite evident

Benefits

- 01

Minimal fire risk

The materials used for production of cast resin transformers are hardly inflammable and can be defined as self-extinguishing, which is why there is no need to use any special fire protection coatings for this type of transformers. Furthermore, in case of fire, the emission of toxic gases and opaque fumes is very low. These advantages make cast resin transformers a perfect choice for installations at places where safety is crucial, such as hospitals, public premises, airports, subway lines, mines, oil rigs, nuclear power plants, ships, etc.

No cooling liquids

Cast resin transformers need only air for cooling. They are therefore nearly maintenance-free, whereas a liquid-cooled transformer needs much more attention. This also makes cast resin transformers eco-friendlier since no liquid coolants – of whichever chemical composition – can be released into the environment.

Benefits

- 02

Easier maintenance

Cast resin insulation guarantees secure performance of the transformer with no need for complicated and costly maintenance. Preventive maintenance of cast resin transformers consists in a simple visual check.

Low operating costs

Low losses in the magnetic core and in the windings reduce the costs of operation.

Easier maintenance

The transformer is a key component in the electrical supply network, therefore ease and quickness of its installation should be born in mind. A cast resin transformer is easily installed, e.g. no blast walls are necessary. Consequently, the planning of the installation is simplified and installation costs are saved.

Benefits

- 03

Advantages of IP enclosure

Instead of traditional transformer bays, simple IP enclosures can be used for access prevention and protection of cast resin transformers. IP enclosures come in different types and colours depending on the client’s needs and preferences.

Possibility of significant increase in performance

Through optimized forced ventilation there is an increase in performance of about 40%.

High short-time overload capability

Current density in the windings of cast resin transformers is considerably lower than in those of oil-immersed transformers. Hence, short-time load peaks, such as with wind power installations, can be easily overcome with no need to plan adequate oversizing.

Benefits

- 04

High reliability

The high technology employed in the manufacturing process of windings gives the product a high level of reliability.

Versatility and performance

Versatility and performance

Technical Info

Data Sheets

The standard product range from POWER. Sp. z o.o. covers distribution cast resin transformers from 50kVA up to 5000kVA, with insulation class up to 36kV, with Eco-design, reduced or standard losses:

- 01

- 02

- 03

1.1

1.2

1.1

1.2

1.1

1.2

TRANSFORMERS UP TO CLASS/TRANSFORMATOREN BIS 12 kV – Uk/Kurzschlußstrom 4%

Power (kVA)100160200250315400500630
Uk%44444666
Po (W)440 (Co)610 (Co)715 (Co)820 (Co)960 (Co)1150 (Co)1300 (Co)1500 (Co)
Pcc 120˚ (W)2000 (Bk)2700 (Bk)3050 (Bk)3500 (Bk)4100 (Bk)4900 (Bk)5950 (Bk)7300 (Bk)
LwA (dB)5962646567686970
LpA (dB)4853545557585960
A (mm)10401120123012701300130013801410
B (mm)670670670670670820820820
C (mm)11501200130013001400150015501650
D (mm)520520520520520670670670
E (mm)125125125125125125125125
Weight (kg)52075087010101150134015901820

TRANSFORMERS UP TO CLASS/TRANSFORMATOREN BIS 12 kV – Uk/Kurzschlußstrom 6%

Power (kVA)100160200250315400500630800100012501600200025003150
Uk (%)666666666666666
Po (W)440 (Ao)610 (Ao)700 (Ao)820 (Ao)950 (Ao)1150 (Ao)1300 (Ao)1500 (Ao)1800 (Ao)2100 (Ao)2500 (Ao)2800 (Ao)3600 (Ao)4300 (Ao)5300 (Ao)
Pcc 120˚ (W)2000 (Bk)2700 (Ao)3100 (Ao)3500 (Ao)4200 (Ao)4900 (Ao)6100 (Ao)7300 (Ao)9000 (Ao)10000 (Ao)12000 (Ao)14500 (Ao)18000 (Ao)21000 (Ao)26000 (Ao)
LwA (dB)596264656768697071737576788183
LpA (dB)505343555758596061626364666870
A (mm)112011201230127013001330138014101460151016201640171017902060
B (mm)6706706706708208208208201000100010501050130013001300
C (mm)110011501200130013001400150015501650175018502150215022502450
D (mm)520520520520670670820820820820820820107010701070
E (mm)125125125125125125125125125125160160200200200
Weight (kg)50072084097011001250153017602080248028703350395047005640

TRANSFORMERS UP TO CLASS/TRANSFORMATOREN BIS 24 kV – Uk/Kurzschlußstrom 6%

Power (kVA)100160200250315400500630800100012501600200025003150
Uk%444446666666666
Po (W)46065077088010501200145016502000230028003100400050006000
Pcc 120˚ (W)205290335380465550650760940110013001600180023002800
LwA (dB)596264656768697072737576788183
LpA (dB)505355555758596062626363656870
A (mm)107012501250125013001330136014101570157017401740186020102100
B (mm)6706706706706708208208201000100010001000130013001300
C (mm)110011501200130013001400150015501700175019502200225023002450
D (mm)520520520520670670670670820820820820107010701070
E (mm)125125125125125125125125125125160160200200200
Weight (kg)530760880102011601360161018502190261030203530416049505940

TRANSFORMERS UP TO CLASS/TRANSFORMATOREN BIS 24 kV – Uk/Kurzschlußstrom 4%

Power (kVA)100160200250315400500630
Uk (%)44444444
Po (W)400580690800950110013501600
Pcc 120˚ (W)17502500298034504170490055506900
LwA (dB)5962646567686970
LpA (dB)5053545556585860
A (mm)10401070125012501250133013301360
B (mm)670670670670820820820820
C (mm)11501200130013001400150015501650
D (mm)520520520520670670670670
E (mm)125125125125125125125125
Weight (kg)57082095011001250147017402000

TRANSFORMERS UP TO CLASS 12 kV – REDUCED LOSSES (FORMER TIER1) AoBk

Power (kVA)100160200250315400500630
Uk%44444444
Po (W)2804004535206197509001100
Pcc 120˚ (W)20502900330038004530550064107600
LwA (dB)5156565759606162
LpA (dB)3942434446474848
A (mm)11001100120012001300130014001400
B (mm)670670670670670820820820
C (mm)12251315135014351560157515901750
D (mm)520520520520520670670670
E (mm)125125125125125125125125
Weight (kg)740860103011401280150016502000

TRANSFORMERS UP TO CLASS/TRANSFORMATOREN BIS 12 kV – Uk/Kurzschlußstrom 6%

Power (kVA)100160200250315400500630800100012501600200025003150
Uk (%)666666666666666
Po (W)280400450520619750900110013001550 1800 2200260031003800
Pcc 120˚ (W)20502900 330038004536550064107600800090001100013000160001900022000
LwA (dB)515456575860616264656768707174
LpA (dB)394443444647484950515354555659
A (mm)104011001200120012501300140014001500150017001700180019002000
B (mm)6706706706708208208208201000100010501050130013001300
C (mm)113012351350137513751440156017301815187020852310233025002570
D (mm)520520520520670670670820820820820820107010701070
E (mm)125125125125125125125125125125160160200200200
Weight (kg)6958001045106512101500182020502300280034004200485064006800

TRANSFORMERS UP TO CLASS/TRANSFORMATOREN BIS 24 kV – Uk/Kurzschlußstrom 4%

Power (kVA)100160200250315400500630
Uk%44444444
Po (W)2804004535206197509001100
Pcc 120˚ (W)20502900330038004530550064107600
LwA (dB)5154565759606162
LpA (dB)3941434446474748
A (mm)10701250120012001260129013801410
B (mm)670670670670820820820820
C (mm)12651285132014601500150016801850
D (mm)520520520520670670670670
E (mm)125125125125125125125125
Weight (kg)8101030120012401480158022602540

TRANSFORMERS UP TO CLASS/TRANSFORMATOREN BIS 24 kV – Uk/Kurzschlußstrom 6%

Power (kVA)100160200250315400500630800100012501600200025003150
Uk (%)666666666666666
Po (W)28040045352061075090011001300155018002200260031003800
Pcc 120˚ (W)2050290033003800453655006410760080009000110001300016000 1900022000
LwA (dB)515456575860616264656768707174
LpA (dB)394443444647484850515353555659
A (mm)120012001200130013301300140014501500170018001900200021002190
B (mm)6706706706706708208208201000100010001000130013001300
C (mm)121011851360136013701440154517151715200020452195235025002425
D (mm)520520520520670670670679820820820820107010701070
E (mm)125125125125125125125125125125160160200200200
Weight (kg)75010001100126014001630175020602700301033304170542065007160

TRANSFORMERS UP TO CLASS/TRANSFORMATOREN BIS 12 kV – Uk/Kurzschlußstrom 4%

Power (kVA)1001602002503154005006308001000
Uk (%)4444444444
Po (W)25236040846855767581199011701395
Pcc 120˚ (W)1800260029553400387645005630710080009000
LwA (dB)50535656585960616364
LpA (dB)39434445464748485051
A (mm)1080114012501140120012601260132013801500
B (mm)67067067067067082082082010001000
C (mm)1175121012851400144015001530158016801680
D (mm)520520520520520670670670820820
E (mm)125125125125125125125125125125
Weight (kg)79097010801170139016601770204022802820

TRANSFORMERS UP TO CLASS/TRANSFORMATOREN BIS 12 kV – Uk/Kurzschlußstrom 6%

Power (kVA)100160200250315400500630800100012501600200025003150
Uk (%)666666666666666
Po (W)2523604084685576758119901170139516201980234027903420
Pcc 120˚ (W)180026002955340038764500563071008000 900011000130001600019000 22000
LwA (dB)505355565859606163646667697073
LpA (dB)384143434546474949505252545558
A (mm)125012501250125012501330136013601570157016801680186020102100
B (mm)6706706706708208208208201000100010501050130013001300
C (mm)109511751285136514601460155015501680188019902140224023802425
D (mm)520520520520670670670670820820820820107010701070
E (mm)125125125125125125125125125125160160200200200
Weight (kg)8409801120133014801740187020002410284033804060519061107530

TRANSFORMERS UP TO CLASS/TRANSFORMATOREN BIS 24 kV – Uk/Kurzschlußstrom 4%

Power (kVA)1001602002503154005006308001000
Uk (%)4444444444
Po (W)25236040846855767581199011701395
Pcc 120˚ (W)1800260029553400387638765630710080009000
LwA (dB)50535556585960616364
LpA (dB)38404243454647484950
A (mm)1140120012601290135013501380150015001560
B (mm)67067067067067082082082010001000
C (mm)1210132013601470153015801580175018502010
D (mm)520520520520520670670670820820
E (mm)125125125125125125125125125125
Weight (kg)940115013901610183020102070260028403430

TRANSFORMERS UP TO CLASS/TRANSFORMATOREN BIS 24 kV – Uk/Kurzschlußstrom 6%

Power (kVA)100160200250315400500630800100012501600200025003150
Uk (%)666666666666666
Po (W)2523604084685576758119901170139516201980234027903420
Pcc 120˚ (W)18002600295534003876450056307100800090001100013000160001900022000
LwA (dB)505355565859606163646667697073
LpA (dB)384142434546474749505152545557
A (mm)114012501250133013301360141014101570168016801860201021002250
B (mm)6706706706708208208208201000100010501050130013001300
C (mm)115511751285132014001500150016501780195021402200238024552605
D (mm)520520520520670670670670820820820820107010701070
E (mm)125125125125125125125125125125160160200200200
Weight (kg)7509101050118013501630177020202860325036804600573071508470

Operation Conditions

C2E2F1

All of our transformers are manufactured in compliance with IEC 60076-11 standard and in particular meet the requirements for climatic (C), environmental (E) and fire (F) classes

Climatic class C2

Transformers suitable for working, transportation and storage at temperatures down to -25°C.

Environmental class E2

Transformers suitable for working in environment where they can be subject to frequent condensation, heavy pollution or a combination of the two.

Fire class F1

Transformers exposed to a fire hazard. They are characterized by restricted inflammability, low emission of toxic substances and opaque fumes.

- 01

Factory Acceptance Tests

Each and every transformer undergo a series of routine tests in compliance with IEC60076-11 at our own testing room, which include:

  • Measurement of winding resistance
  • Measurement of voltage ratio and check of phase displacement
  • Measurement of short-circuit impedance and load losses
  • Measurement of no-load losses and no-load current
  • Insulation test of MV against LV and earth
  • Insulation test of LV against MV and earth
  • Overvoltage test
  • Measurement of partial discharges

- 02

Special Tests

On customer’s request, the following type and special tests can be conducted:

  • Noise level measurement
  • Temperature rise test
  • Impulse test

- 01

Special applications

Our design and construction capacity can satisfy all various needs as to different types and applications of transformers:

  • Autotransformers
  • Transformers for 6-12-18-24-36 pulse converters
  • Photovoltaic application
  • Wind power transformers
  • Earthing transformers
  • Reactors
  • HV-HV transformers and LV-LV transformers
  • Application for traction and for testing room

- 02

Standard accessories
  • 3 PT100 probes for windings temperature
  • 4 lifting eyebolts
  • 4 bidirectional wheels
  • 2 earthing links
  • Identification plate
  • Tapping terminal board on MV side
  • CE marking

- 03

Accessories upon request
  • Forced cooling system (POWER Sp. z o.o. production)
  • Anti-vibration pads for transformers wheels (POWER Sp. z o.o. production)
  • Temperature relay for PT100 and PTC sensors
  • Additional PT100 or PTC probes
  • Enclosures with different degrees of IP protection
  • Earthing bolts with spherical end Ø 20mm, Ø 25mm and Ø 30mm
  • 2 or more contact thermometers
  • Marshalling boxes with one or more relays wired according to client’s specifications
  • Electrostatic screen between primary and secondary windings
  • Bi-metal (Al/Cu) plates
  • Surge arrester in MV side from 3 kV up to 36 kV

- 04

Special executions
  • MV and LV terminals brought to the side of the transformers
  • MV or LV terminals in the bottom
  • MV and LV windings in copper
  • LV in cast encapsulate coils
  • Transformers with over temperature in class B
  • Installation above 1000 m a.s.l.
  • Ambient temperature above +40˚C
  • Ambient temperature below -25˚C

Accessories

Magnetic Cores

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