E.M.G. Snc

Via Giorgio La Pira, 6

52012 Bibbiena St. (AR)

Italia


fon: +39 0575-536860

fax: +39 0575-536860

e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.

web: http://www.emgtrasformatori.it

 

EMG-ISO 9001-2000-200

Cast Resin Transformers

E.M.G. - Transformers are designed and manufactured according to CEI 14-32 and IEC 60076-11 CENELEC HD 464 and CENELEC HD 528 On request, additional standards can be applied.

The core of these transformers is made of cold rolled grain oriented steel with low losses. The surface is insulated in order to reduce eddy current losses. A special technology makes it possible to minimize the losses, and Vibaration SOUNDS.

The Ns-windings are made of aluminum or copper tape (standard UNI 4507). They are insulated by coating with a special resin film. The impregnation of the windings is carried out under vacuum in order to prevent moisture absorption. This allows these transformers in high ambient temperatures, are used for heavy soiling under tropical or marine conditions.

The Ms-winding is made ​​of aluminum or copper band, surrounded by a thermal insulating material of the class F, and aligned in a special form. After heat treatment, it is cast with epoxy resin in vacuum. After the time-and temperature-controlled Polymeristion and relaxation gives a compact unit, the winding is protected by an adequate thickness of the resin. This technology allows to create MS-windings, which is protected against any kind of external accidents such as fire, humidity and condensation.

characteristic data

  • The epoxy resin used contains minerals, such as silica and alumina, and is cast in an autoclave under Vakkuum to achieve a perfect degassing with respect to the presence of air. In terms of insulation, epoxy resin is in fire class F. He has successfully passed the tests for the class E2, C2 and F1 as defined in EN IEC 60076 standards.
  • The primary windings are equipped with a 5-position bridging switch, with which an adjustment of ± 2 x 2.5% is possible. Other values ​​are available on request.
  • The ambient temperature must not exceed 40 ° C usually, and the temperature increase should I be about 100K with standard transformers in the windings.
  • EMG transformers can be executed for use in locations with ambient temperatures up to 55 ° C!
  • E.M.G. Transformers have a very low noise level of 46 dB (A) to 68 dB (A).
  • The maximum height of standard transformers is 1000 m above sea level. But it can also be manufactured transformers for higher-up locations.
  • The transformers are equipped with Pt100 3 pcs (1 pcs in each winding Ns), connected to a temperature control unit.
  • For proper operation of the transformer a correct and natural ventilation in the room must be guaranteed. The operating conditions in function of the insulation transformer are defined by IEC IEC 60076-11 14-32.
  • For special applications where a temporary increase in performance over the nominal values ​​occurs, the use of a forced ventilation is recommended.
  • Tests carried out
    • Measurement and inspection of the transmission ratio and the gear group
    • Measuring the resistance of the windings
    • Measurement of no-load losses and no-load current
    • Measuring the losses of load
    • Measurement of short-circuit voltage
    • Insulation test voltage
    • Insulation test of the induced voltages
    • Measurement of Partial Discharge

      Test Type (optional):
      pulse Test
      temperature rise

      Special test (on request):
      Measurement of noise emitted

operating conditions
In line with the environmental, climatic and fire-resistant categories the transformers can be eingestzt under the following conditions:

 

environment class
E0 No condensation on the transformer, minor soiling, installation in a clean, dry place
E1 Occasional condensation and little pollution
E2 The Transformer is subject to considerable condensation and / or heavy contamination

 

climate class
C1 The transformer is not suitable for operation at temperatures below -5 ° C, but can be up to -25 ° C during transportation
C2 The transformer can be used, handled and stored as -25 ° C.

 

Brandklasse
F0 There is no fire hazard, no precautions must be taken to reduce the flammability
F1 In case of fire, the transformer is self-extinguishing, and there are no harmful substances and / or toxic fumes emitted

For more information, see the catalog (Italian /English)

Castresin 36kV class

General characteristics:

MV winding: Cast Resin

IEC 60076 – HD 464 S1 – DIN 42523 – CEI 14 -32

Frequency 50 Hz
Secondary Voltage at No-Load 415V
Regulation Taps On HV Side ± 2 x 2,5%
Vector Group Dyn11
Primary Insolation level 36 - 70 - 145 / 170kV
Secondary Insolation level 1,1 - 3kV
Ambient Temperature -25...+40°C
Environment-Climatic-Res. To Fire Class E2-C2-F1

 

Read more: Castresin 36kV class

Castresin 24kV class

General characteristics:

MV winding: Cast Resin

IEC 60076 – HD 464 S1 – DIN 42523 – CEI 14 -32

Frequency 50 Hz
Secondary Voltage at No-Load 400V
Regulation Taps On HV Side ± 2 x 2,5%
Vector Group Dyn11
Primary Insolation level 24 - 50 - 95 / 125kV
Secondary Insolation level 1,1 - 3kV
Ambient Temperature -25...+40°C
Environment-Climatic-Res. To Fire Class E2-C2-F1

 

Read more: Castresin 24kV class

Castresin 17,5kV class

General characteristics:

MV winding: Cast Resin

IEC 60076 – HD 464 S1 – DIN 42523 – CEI 14 -32

Frequency 50 Hz
Secondary Voltage at No-Load 400V
Regulation Taps On HV Side ± 2 x 2,5%
Vector Group Dyn11
Primary Insolation level 17,5 - 38 - 75 / 95kV
Secondary Insolation level 1,1 - 3kV
Ambient Temperature -25...+40°C
Environment-Climatic-Res. To Fire Class E2-C2-F1

 

Read more: Castresin 17,5kV class

Castresin 12kV class

General characteristics:

MV winding: Cast Resin

IEC 60076 – HD 464 S1 – DIN 42523 – CEI 14 -32

Frequency 50 Hz
Secondary Voltage at No-Load 400V
Regulation Taps On HV Side ± 2 x 2,5%
Vector Group Dyn11
Primary Insolation level 12 - 28 - 60 / 75kV
Secondary Insolation level 1,1 - 3kV
Ambient Temperature -25...+40°C
Environment-Climatic-Res. To Fire Class E2-C2-F1

 

Read more: Castresin 12kV class