EI Transformer for Power Supply EI Transformer for Power Supply

POWER: 300VA
Insulation systems: 105/130/155/180 degree are available.
Primary is specified, 100/110/115/120/220/230/240/380/415V.
Secondary is specified by customer.
Design to meet UL/CSA/TUV/VDE/CE and other safety requirements.
ROHS 2.0 Directive and (SVHC/REACH) are conformity.
Application field: Telecomm. Power Supply

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Key Specifications

AC power supply transformer is the device installed in a power supply for voltage conversion. The primary and secondary can be design according to customer's request. The range of frequecy can be design 45~500Hz. The common frequency is 50~60Hz, 47~63Hz, 45~70Hz, 20-75Hz. Power supply has high requirements on the transformer。It requests transformer is with high efficiency, small loss, Low interference resistance, small magnetic leakage, low temperature rise. Especially for the high level insulation.


Power Range: 10VA to 450VA (EI 41 ~ EI133.2)

Phase: Single

Input/Output: Customized

Insulation: up to 4kV (Hi-pot)

Sample Lead Time: 3~5 days
 Production Lead Time:3 Weeks  (Urgent order can be negotiated)
 Quantity:No MOQ Require

 

Specification Table

 

Power Regulation Temperature
Rise
Size(mm)   Power Regulation Temperature
Rise
Size(mm)
(VA) (%) L W H F/A×B   (VA) (%) L W H F/A×B
10VA 18.0% 60℃ 50 34 44 61   120VA 7.5% 60℃ 86.2 72 72 71×63
15VA 18.0% 60℃ 50 40 44 61   140VA 6.8% 60℃ 86.2 79 72 71×70
25VA 16.0% 60℃ 59.5 44 50.5 70.5   160VA 6.5% 60℃ 96 75 80.5 76×61
30VA 15.0% 60℃ 59.5 48.5 50.5 70.5   190VA 6.4% 60℃ 96 82 80.5 76×68
35VA 13.0% 60℃ 59.5 54 50.5 70.5   220VA 5.0% 65℃ 105 79 91 76×58
40VA 12.0% 60℃ 68.5 52 58.5 81.5   260VA 4.8% 65℃ 105 89 91 76×68
50VA 11.0% 60℃ 68.5 58 58.5 81.5   290VA 4.8% 65℃ 105 94 91 76×73
60VA 9.0% 60℃ 68.5 68 58.5 81.5   350VA 4.6% 65℃ 114 94 97.5 95×80
70VA 8.0% 60℃ 78.5 62 68.5 90   420VA 4.5% 65℃ 114 104 97.5 95×90
90VA 8.0% 60℃ 78.5 68 68.5 90   450VA 4.5% 65℃ 114 109 97.5 95×95


                         

                                            

Process

EI Transformer Main Materials (IQC process)

All the material is inspected strictly with ISO9001:2015 quality program.

Core: appearance inspection and core loss test.

Copper wire: pinhole test and coat of adhesion test

 

 EI  Transformer Process

  • EI lamination has 0.35mm and 0.5mm thickness, material has Z11/H12/H14/H18/H50 of option.
  • The insulation for coil has 0.075/0.125mm thickness polyster film. 0.18/0.25mm DMD insulation paper and T410 Nomex paper. The brand of polyster film is DUPONT. The layers of overlap is deponds on the safety agent requirements.
  • Primary and Secondary winding wire is polyesterimid enameled, have 130/155/180/200degree for option.
  • Primary lead wire from type UL1617 double insulation for 600V voltage and 105 degree or UL3321 XLPE for 600V and 150degree.
  • Secondary lead wire from type UL1015 for 600V voltage and 105 degree.
  • Outer insulation is overlap 1 layer 0.075/0.125mm thickness polyester film or 0.18/0.25mm DMD insulation paper or T410 Nomex paper.

 

EI  Transformer Testing Items

  • Exciting current & core loss: 100% test
  • DC Resistance: 100% test
  • Layer insulation: 100% test
  • Loading test: 100% test
  • Hi-pot test: 100% test, but the time is only approx 10seconds for the production-run.
  • Aging test: Spot check, 10% of product quantity

 

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