We Manufacture all kinds of Transformers

Yudzhen LLC is a pioneer in manufacturing Torodial, High-Voltage, Power and Measuring Transformers. Visit our 'Products' page to learn more on our products & services.

We Manufacture Torodial Magnetic Cores

Yudzhen LLC manufactures all kinds of Maganetic Cores in all Shapes & Sizes, and custom made as per our clients requirements. Visit our 'Products' page to learn more.

We Manufacture Inductance Coil sets

Yudzhen LLC manufactures customized frame and frameless coils including coils for induction flow meters. Visit our 'Products' page to learn more.

We Manufacture Inductors & Pulse Transformers

Yudzhen LLC manufactures inductors both for protection & to avoid electromagnetic interference in main supplies. Visit our 'Products' page to learn more.

High Voltage Transformers

High-voltage transformers

High-voltage transformers are electromagnetic transformers in a body of glass-nylon composite filled with polymeric compound. High-voltage transformers are designed for ignition of liquid and gas fuels in heat-producing units (heat-generators, boiler units, calcining kilns). They can also be applied for power supply of high-voltage neon lamps used in commercial signs etc.

Original transformer design ensures reliable operation during long service life, low heating and low weight of the finished product. Solid core makes it possible to decrease energy consumption due to reduction of stray currents. For the ease of assembly all terminals for electric connections are located under one plastic lid.

Transformers are distinguished by durability, good chemical and mechanical resistance. They are not corrodible, do not crack and are easy to mount and operate.



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Transformers for Neon

Transformers PKFL 671112.648-xxxx are designed for application in areas protected from direct solar radiation and water.


Main technical characteristics
 
Transformers PKFL 671112.648-xxxx 25/30 mA 35/45 mA 50/60 mA
0225 0325 0425 0525 0625 0235 0335 0435 0250 0350
Operating temperature, C -40...+50
Nominal primary voltage, V ~220, 50
Nominal secondary voltage, V 2000 3000 4000 5000 6000 2000 3000 4000 2000 3000
Primary winding current at nominal load, not over 0.25 0.36 0.49 0.6 0.72 0.35 0.35 0.66 0.48 0.72
Nominal secondary current, mA 25 35 50
Overall dimensions, mm 151 x 120 x 84

 

Example: Transformer PKFL 671112.648-0525 means output voltage of 5 kV, nominal operating current 25 mA.

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ATTENTION

Luminous discharge tubes (neon tubes) are non-standard products. They can have any shape and number of bends, different length and diameter as well as electrodes by various manufacturers. Tubes are manufactured with equipment that has different parameters of vacuumizing and inert gas filling. All the above factors have an effect on electrical parameters of neon lamps. Variations can be really significant. Therefore, for accurate load calculation it is not enough to use loading tables only! Loading table data should be considered as reference only. After load connection to a transformer it is required to measure current in the secondary circuit.

Current in the secondary circuit of transformers should not be more than 5% and less than 10% than the nominal current. Mains voltage should be 220 Volt.

Nominal operating current, /td> Maximal short-circuit current, m/td> Allowable range of current strength in transformer secondary circuit, m/td>
25 30 22.5 - 26.3
35 45 31.5 - 36.8
50 60 45 - 52.5


 

For measuring secondary circuit current a multimeter with a clip-on ammeter.

Avoid under loading of transformers, incorrect load selection leads to a change of transformer operating parameters, which causes premature wear and breakdown of transformers.
 

 

Reference table for Transformer Load Length Calculation.
 
Gas Ar + Hg or + Hg
Outside tube diameter, mm 10 12 15 18
Gas pressure in a tube, mmHg 12 10 8 7
Transformer secondary voltage, V Electrical meters
2000 1.22 1.52 2.13 2.44
3000 2.13 2.74 3.66 4.27
4000 2.74 3.66 4.88 5.79
5000 3.66 4.57 6.1 7.01
6000 4.88 5.79 7.32 8.53


 

Gas Ne
Outside tube diameter, mm 10 12 15 18
Gas pressure in a tube, mmHg 13 12 10 8
Transformer secondary voltage, V Electrical meters
2000 1.22 1.52 2.13 2.44
3000 1.83 2.44 3.05 3.55
4000 2.44 3.05 3.96 4.88
5000 3.05 3.66 5.18 5.79
6000 3.96 4.88 6.1 7.01


To make calculations based on the tables it is required to translate linear length of an estimated load to electrical one. Electrical length of all tubes in a circuit shall be the total of electrical lengths of each separate tube.

Electrical length of a tube is the sum of its linear length (from ceramic ring of one electrode to ceramic ring of another electrode) + 0.3 meters (added to compensate electrode voltage drops).

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Transformers for Burner Ignition

Transformers for burner ignition PKFL 671112.265-03 PKFL 671112.265-04.

Designed for ignition of liquid and gas fuel at heat-producing units (heat-generators, boiler units, calcining kilns, etc.).

Single phase, filled, closed construction.

Designed for application in areas protected from direct solar radiation and water.

Transformers for burner ignition present inductive transformers with two terminal leads and serve for fuel ignition (gas, kerosene, diesel fuel, etc.) between two electrodes or 2 igniters.

 

Main technical characteristics
 
Transformer PKFL 671112.265-03 PKFL 671112.265-04
Operating temperature, C -40...+50
Nominal primary voltage, V ~220+15-10, 50-60
Nominal secondary voltage, V ~7000+750 ~12000+200
Primary winding current at nominal load, A not over 1.1 2.4
Nominal secondary current, mA 30 42
Relative load cycle, % 20%
Cycle time, s 180 120
Continuous arcing time, min 7 5
Overall dimensions, mm 151x120x84
Weight, kg 3.3 3.2


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