Concerning the old style Amperite time delay relays, the ones like octal and 9 pin glass tubes... I can best ask my question with an example. If I have a power transformer in an old tube radio where the B+ is 75ma at 235 volts, and a completely separate transformer for the tube heaters operating at 24 volts. And the relay is hooked to the 24 volt transformer. I turn on the radio and both transformers become live, but I want the 235V B+ voltage to be delayed 15 seconds while the tube heaters are coming up off the 24 volt transformer, is that what an Amperite 24NO15 does? Or does the relay only delay the power that is applied to it, and pass only that power? In this case 24 volts. In other words, does this relay control a separate voltage from the one that powers it? Thank you.
24 is the heater voltage
NO means normally open
15 is the delay time in seconds
The heater and the switch are separate as far as I know, so you can control whatever voltage you'd like.
Tom
NO means normally open
15 is the delay time in seconds
The heater and the switch are separate as far as I know, so you can control whatever voltage you'd like.
Tom
A little googling got me this Amperite data sheet: https://threeneurons.files.wordpress.com/2015/05/amperite_delay.pdf
Tom
Tom
According to the datasheet, it can switch 115 V, 3 A AC. Switching DC is more difficult for a relay than switching AC, and 235 V is more than 115 V.
I don't know what noacronym's mains voltage is. Besides, I don't know if the insulation between the contacts and the coil is sufficient for a direct connection to the mains.
Over here, equipment with protective earth is supposed to have insulation between the mains and the rest that can occasionally withstand 1500 V RMS while the nominal mains voltage is 230 V. If that means you need 750 V for 115 V mains, the relay doesn't quite meet it. Its initial dielectric strength is specified as 500 V RMS between contacts and coil.
Over here, equipment with protective earth is supposed to have insulation between the mains and the rest that can occasionally withstand 1500 V RMS while the nominal mains voltage is 230 V. If that means you need 750 V for 115 V mains, the relay doesn't quite meet it. Its initial dielectric strength is specified as 500 V RMS between contacts and coil.
I've been using these for delaying the 120V mains voltage to my PT for a couple of years now. I delay about 120 seconds seconds for my 866A's mercury to vaporize. I use the 115V heater models just because. You might need to try a few samples as the timing is not exact between samples.