Help with wiring of relays

[boddingtonsbob]

can anyone please advise how to wire a couple of relays with a standard push button switch, to allow a thermostatic controller, when reaching a certain temperature, to send an input to the relay(s) and thus tripping the switch off. The key thing I want to achieve is that the switch/button switches off when sensing the 240v from the heat controller and stays off until manually re-set. cheers

 

[Electroenthusiast]

Connect the load between NC and COM.
Why wouldnt you use bi-metallic strip?

 

[Diver300]

https://www.eleinmec.com/figures/024_03.gif shows you how to do it.

You use the thermostat in place of the reset switch.

 

[boddingtonsbob]

thanks for reply. the thermostatic controller is a digital TC-10 temperature controller, that will be pre-set at a maximum temperature parameter. If and when that temperature is reached, i want the controller to cause the switch to trip, and stay off, and not to switch back on when temperature falls. i need the system to be manually started every time because of the temperature settings.

 

[boddingtonsbob]

thanks for reply!

 

[Reloadron]

thanks for reply. the thermostatic controller is a digital TC-10 temperature controller, that will be pre-set at a maximum temperature parameter. If and when that temperature is reached, i want the controller to cause the switch to trip, and stay off, and not to switch back on when temperature falls. i need the system to be manually started every time because of the temperature settings.

OK, so what you want is an overtemperature relay latching circuit. When the temperature exceeds a set point you likely want to open a main contactor to the heaters and have that latched open until a manual reset is applied. The basic start would look like the attached relay latching circuit but the N/O PB would be replaced with your thermostst overtemp switch. The PB could be left in as a test PB also. The NC PB resets the circuit once it is latched.

Additionally besides pins 1 & 3 relay K1 has other sets of DPDT contacts that can be used.

Ron