Electric water heater temperature controller

Published:2011/8/5 2:08:00 Author:Ecco | Keyword: Electric water heater , temperature controller | From:SeekIC

The electric water heater temperature controller circuit is composed of the power supply circuit, leakage protection circuit, temperature control circuit, water level indication and anti-dry circuit, and it is shown in Figure 3-81. Power supply circuit is composed of the power transformer T, bridge rectifier UR, filter capacitors Cl, C2, and three-terminal voltage regulator integrated circuit ICl. Leakage protection circuit is composed of the current transformer TA, a time-base circuit which is inside of the dual time-base integrated circuit IC2 (lC2a, IC2b), and some other peripheral components. Temperature control circuit consists of the another time-base circuit which is inside of the dual time-base integrated circuit lC2, thermistor RT, transistor V, Relay K, potentiometer RP and the other external components.



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