AndrewT said:Hi,
the CL60 is recommended by many that use 110/120Vac.
I like 50r to 100r of power resistors on 240Vac.
Hi Andrew
The CL60 is rated at 10R. Is 10ohms on a 240vac supply to low?
Does it need to be 50r - 100r?
Thanks
Richard
Are we the only folk capable of telling the truth?Nuuk said:
Only a Scot would say that!
Two CL60s come to about £4. Five 10r 5W WW radials (that I have 1000off) are just £1 for the set.
Hi,
if you keep the two terminals side by side (not split), you can insert the Thermistor without bending any legs.
Insulate the chassis under the terminals and thermistor.
Double insulate the live and neutral wires inside the chassis.
All these components are at Live potential. Protect them from wayward fingers and dropped tools.
I am not at all sure that parallel NTC thermistors will work.
The one that has slightly lower resistance will pass more current. This will heat it and drop the resistance even more, passing a bigger proportion of the total current draw. Then around that circle again. Effectively one device is doing all the work and dissipating most of the heat and thus setting your thermistor current limit.
Your pic shows quite small Power Thermistors. One of these may not suit soft starting a transformer.
You could series connect the two Thermistors using a 3way terminal strip with Live in and out through the outer terminals.
if you keep the two terminals side by side (not split), you can insert the Thermistor without bending any legs.
Insulate the chassis under the terminals and thermistor.
Double insulate the live and neutral wires inside the chassis.
All these components are at Live potential. Protect them from wayward fingers and dropped tools.
I am not at all sure that parallel NTC thermistors will work.
The one that has slightly lower resistance will pass more current. This will heat it and drop the resistance even more, passing a bigger proportion of the total current draw. Then around that circle again. Effectively one device is doing all the work and dissipating most of the heat and thus setting your thermistor current limit.
Your pic shows quite small Power Thermistors. One of these may not suit soft starting a transformer.
You could series connect the two Thermistors using a 3way terminal strip with Live in and out through the outer terminals.
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