MARKING

PRIMARY/SECONDARY VOLTAGE

Primary Voltage, this is the supply voltage assigned to the transformer by manufacturer, to achieve the secondary power indicated for the working secondaries conditions.
Secondary Voltage, is the voltage supplied by the transformer at secondary circuit with primary voltage at nominal value and secondary indicated current.

AMBIENT TEMPERATURE / THERMAL CLASS

Ambient temperature, the maximum temperature that transformer can be operate in a continuous mode under nominal conditions.
Thermal class, it indicates the highest temperature that any material in the transformer can reach when working, it is shown with a letter after that ambient temperature according the IEC60216 standard.

(E-120ºC) (B-130ºC) (F-155ºC) (H-180ºC)

SECONDARY POWER

Secondary power, indicated in the catalogue supplied by the secondary of transformer, when the primary gets the nominal conditions. For example 1,5VA at ta40ºC/B. for dual secondaries the total power corresponds to the sum of two windings. If the secondary is intended to be connected to a rectifier bridge and smooth capacitors, to supply DC voltage, the power required is quite more bigger than V*I sec. product, to help you to determine the right transformer power our technical dept. will help you.

PROTECTIONS

Short circuit proof, our range of transformers is short circuit proof until 3,2VA power. It is indicated by the safety transformer symbol showing the two inferior vertical lines assembled. The rest of powers need the external protection i.e. fuse, transformer can be manufactured with internal thermal fuse or PTC. The type of external fuses recommended can be type T (time-lag) at primary side or F (Fast) at secondary side.

HEATING

Heating is the increase of the winding temperature when operating under certain conditions, it must be determined by the resistance variation method in a steady state condition.

ADAPTED /SPECIAL TRANSFORMER DESIGNS

Any other transformer design that requires different or special characteristics than those indicated in the catalogue, TIYAN technical dept. can evaluate together with customer and see what solutions can be provided in order to obtain the best possible results.