oceansoul
Member
Registered: 19th Jun 06
Location: Sunbury, Surrey
User status: Offline
|
I been tasked at work to redesign a water heating system for a safety shower, so that the heater is shut off when the shower is empty, and also have lights to show that the heater is on and that the mains is healthy i.e. 230VAC. Ive come up with this diagram, but me mentor is off tomorrow and he wants me to finish it by end of the day. Also what rating relay should i use, the thermistor is rater at 16A so that gives a Power rating of 3680W. Im thinking a relay (contactor) rated to 3.8kW.
Just to reiterate im not asking anyone to do my work for me, just check over it and maybe suggest a better way of going about it etc.
Cheers in advance
|
Bart
Member
Registered: 19th Aug 02
Location: Midsomer Norton, Bristol Avon
User status: Offline
|
Yep looks good to me mate.
-R1 is your contactor.
Your Float switch is shown in a fail safe state (i.e the switch/ball breaks then it goes to the normally open position and remains healthy).
16A sounds a bit high for a shower?? but then i've only ever worked with pumps and motors.
Yes a 3.8kw contactor will suit that. I doubt there will be 100% efficiency with the thing anyway, so it probably wont pull 16A.
|
