Newark sent me 30 of those PTCs in error. The return shipping would have cost them more money than it was worth so they told me to keep them. That was two years ago and I have not used one yet 😂 Perhaps one day 🤔
What is the frequency on those transformers? The reason I ask is, it looks to be voltages used in the US, which is 60 Hz. A 50 Hz transformer will work at 60 Hz, but not vice versa. 60 Hz on 50 Hz will run hot, as the core is smaller on the 60 Hz transformer over the higher frequency.
I think also amplitude of output voltage will be different/wrong if frequency is not matching the transformer freq? From video he only stated he wanted he wants to convert from 110V to 240V, but he never mentioned about Hz used by device and Hz he has in his country. I think he would have to check this with oscilloscope.
@@orion310591RS I didn't notice the frequency listed on the labels, only the two voltages, and I don't know if the seller stated it. That voltage, though, made me wonder what frequency it was. A 60 Hz transformer running at 50 Hz will have a core that goes into saturation, thus, it will get hot. There's not enough iron in it, as they run the cores at about 10-12 kilogauss in most cases, which is just under the knee of the B-H curve. If you lower the frequency on a 60 Hz transformer, the core runs into the saturation region above the knee. I would say that the waveform of the secondary would be affected somewhat as well.
@@TheDefpom Those look like the transformers wound in China, and if so, they design most everything for 50 Hz. My hope is that they just picked a core that they already had, and adjusted the turns per volt. Many foreign transformer companies just wind them all for 50 Hz, since they know they will work on 60 Hz. They don't have to stock two different cores that way.
Maybe 40 years ago I bought a transformer from Tandy (RadioShack) here in the UK to power an LED digital alarm clock module (from RS components) 240v in possibly 12v out, at maybe 250mA, a US sourced product, 60Hz, secondary current requirements were low, maybe 100mA. It initially worked fine but one day, fortunately when I was nearby it partially melted its way out of the (very expensive) two tone Vero plastic case, I replaced it with a UK sourced transformer and that setup lasted without a problem for a couple of decades until I upgraded to an alarm that successfully rode through external power failures. Since then I’ve always been wary of wound 60Hz products running on 50Hz.
I've found the same here in Western Australia. If you find something, buy multiple. Been burnt a few times.
Newark sent me 30 of those PTCs in error. The return shipping would have cost them more money than it was worth so they told me to keep them. That was two years ago and I have not used one yet 😂
Perhaps one day 🤔
What is the frequency on those transformers? The reason I ask is, it looks to be voltages used in the US, which is 60 Hz. A 50 Hz transformer will work at 60 Hz, but not vice versa. 60 Hz on 50 Hz will run hot, as the core is smaller on the 60 Hz transformer over the higher frequency.
I think also amplitude of output voltage will be different/wrong if frequency is not matching the transformer freq?
From video he only stated he wanted he wants to convert from 110V to 240V, but he never mentioned about Hz used by device and Hz he has in his country.
I think he would have to check this with oscilloscope.
@@orion310591RS I didn't notice the frequency listed on the labels, only the two voltages, and I don't know if the seller stated it. That voltage, though, made me wonder what frequency it was.
A 60 Hz transformer running at 50 Hz will have a core that goes into saturation, thus, it will get hot. There's not enough iron in it, as they run the cores at about 10-12 kilogauss in most cases, which is just under the knee of the B-H curve. If you lower the frequency on a 60 Hz transformer, the core runs into the saturation region above the knee. I would say that the waveform of the secondary would be affected somewhat as well.
@@craxd1 going from 240v 50Hz to 120v, will be at 50Hz instead of 60 but shouldn’t really matter for what it is used on.
@@TheDefpom Those look like the transformers wound in China, and if so, they design most everything for 50 Hz. My hope is that they just picked a core that they already had, and adjusted the turns per volt. Many foreign transformer companies just wind them all for 50 Hz, since they know they will work on 60 Hz. They don't have to stock two different cores that way.
Maybe 40 years ago I bought a transformer from Tandy (RadioShack) here in the UK to power an LED digital alarm clock module (from RS components)
240v in possibly 12v out, at maybe 250mA, a US sourced product, 60Hz, secondary current requirements were low, maybe 100mA.
It initially worked fine but one day, fortunately when I was nearby it partially melted its way out of the (very expensive) two tone Vero plastic case, I replaced it with a UK sourced transformer and that setup lasted without a problem for a couple of decades until I upgraded to an alarm that successfully rode through external power failures.
Since then I’ve always been wary of wound 60Hz products running on 50Hz.