Hi Thanks for reading. I have a large transformer and want to use a soft start as the mains keeps tripping everytime i plug the transformer in.
In the pass labs f5 amp they use a single thermistor in between the two primary windings. The transformer i have is encapsulated so cannot access the windings. I have the two mains cable live and neutral sticking out of the encapsulation, and four cables for the two secondary windings
Where can i put the thermistor, and which thermistor would you use for british ac 240 volts, something rugged.
The two secondaries are 15 amps each
Thanks
In the pass labs f5 amp they use a single thermistor in between the two primary windings. The transformer i have is encapsulated so cannot access the windings. I have the two mains cable live and neutral sticking out of the encapsulation, and four cables for the two secondary windings
Where can i put the thermistor, and which thermistor would you use for british ac 240 volts, something rugged.
The two secondaries are 15 amps each
Thanks
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Simple solution, buy a soft start module. If done right it helps you to keep mains voltage and secondary voltages apart. There are some that even have a very small transformer for the cirquit, those can be triggered by different kinds of switches. Maybe look at ebay.
The low part count version is a resistor, like 5 Ohm 20 Watt and a relais that bridges the resistor, just a fraction of a second later, driven by the secondary DC voltage. The not so nice thing is to have the mains voltage near to the secondary's.
Lke this https://www.ebay.co.uk/itm/28301787...JZIeHdTVRTVjeVMtR4BqNecQ==|tkp:Bk9SR4zSje_dYQ
The low part count version is a resistor, like 5 Ohm 20 Watt and a relais that bridges the resistor, just a fraction of a second later, driven by the secondary DC voltage. The not so nice thing is to have the mains voltage near to the secondary's.
Lke this https://www.ebay.co.uk/itm/28301787...JZIeHdTVRTVjeVMtR4BqNecQ==|tkp:Bk9SR4zSje_dYQ
As the windings and thermistor are in series it doesnt matter where you put it.
Thanks! So i can just put the thermistor in series with the mains cable and the transformer. Which thermistor would you recommend
