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Se vende transformador de aislamiento para radio antigua.
Caracteristicas: 230V - 30VA 0 -115 - 125V
MEDIDAS:
- ENTRE ANCLAJES: 7,5 cm
- LARGO: 6 cm
- ALTO: 5 cm
- ANCHO: 6 cm
- PESO: 650 gr
Fabricado en España, cobre de alta calidad. El precio es por unidad. Disponemos de más transformadores de diferentes capacidades.
Para mas informacion, consulte la fotografia.
Ref. R16-15540
Isolation transformer or network separator.
Every electrical transformer, be it voltage reducer or booster, has the peculiarity of transferring energy between its windings, by electromagnetic induction and without any electrical connection between them (except auto-transformers). Thus, a transformer provides isolation between circuits connected in the primary winding and those connected to the secondary.
This particularity is useful, as a safety measure, when it is necessary to supply an appliance (electrical or electronic) from the electrical network, but without a direct connection to it, to protect the physical integrity of those who must come into contact with its circuits. . For example, when the repair technician must work on devices, whose electronic circuits are directly fed from the electrical network. Commonly called: "hot circuits", "hot chassis", "live chassis", etc. and in the case of old radio devices, the so-called “universal” ones, in which one of the phases of the network is connected to the chassis.
Between the 230 VAC household electrical network and ground, there is always an electrical potential difference that can reach up to 100% of the line voltage. The human body, being largely made up of water, is a good conductor of electricity. Coming in contact with the electrical network or with any circuit connected directly to it, can cause that difference in potential or voltage existing between the line and ground to produce an electrical current through the body, which can reach be lethal.
By placing an isolating transformer between the electrical network and the device or circuit being manipulated, it will receive the same voltage required for its operation but it will be isolated from the potential difference between the electrical distribution line and ground, avoiding that way, the danger of shock when coming into contact with it.
This safety measure also makes it possible to protect the circuits of the device and the test instruments powered by the electrical network that must be connected to it during repair work, for example oscilloscope, signal generator, etc. As these instruments usually have a ground connection through the socket, and when connecting their test cable to the "live" chassis (connected directly to the electrical network), it produces a short circuit that can cause severe damage to the components and electronic circuits of the equipment under repair and of the test instrument involved.
Our transformers with concentric windings are also provided with an electrostatic screen between primary and secondary, composed of a 0.1mm copper tape of the same width as the winding.
This screen ground a possible leak between the primary and secondary windings in addition to eliminating some of the network interference.
As the secondary offers the possibility of having voltages of 115 and 125v, it is used to adapt most old appliances that do not have a power transformer to the current mains voltage.
