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Questions tagged [resistive-load]

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Triac design for switching load to resistive heater

I'm designing a triac-based relay circuit to switch ac mains on-off to a resistive heater. The app note (AN-3004) for the opto isolator I am using, the MOC3061, suggests using a gate resistor value ...
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1answer
268 views

Which relay will last the longest?

I'd like to control a 20 amp, 240 volt AC resistive load with a heavy duty contactor. The contactor I have is a Siemens 3TX7130-0DB03 rated for 30 amps, and DPDT. I was originally going to switch ...
2
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1answer
84 views

Measuring Current, Resistance and power capacity of an Incandescent bulb [closed]

We are making a cheap 1000w load bank, using 10 incandescent bulbs of 100 watts each, connected parallel to vary the load. On a 230V AC 50Hz Home Supply. I am able to measure the current, but when I ...
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2answers
192 views

60VAC resistive load (heater) on 220VAC?

I need to run a ceramic fiber heater (Watlow part number vc401a06a, datasheet) at 220VAC. This particular part is rated at 60VAC, for 220W. Can I safely use this on 220VAC, if I'll be controlling it ...
4
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4answers
789 views

Is a protection diode needed for a resistive load?

In some applications a flyback diode is added parallel to the load. Is that because the switching causes reverse voltage for inductive loads? What if we have a resistive load instead? Do we still need ...