Water shortage safety interlock of boiler feed pump

摘要

(57) Abstract Topic Making operation the boiler feed pump halt at the time of the water shortage, thatDamage is prevented, the danger of being formed by temperature rise preventsOffer of water shortage safety interlock of ru boiler feed pump. Solutions Water shortage safety interlock of boiler feed pump of this deviceThe bridged circuit and the said bridge time which have the thermisterIt connects to the path and when perceiving the temperature where the said bridged circuit differs,Fairing the relative circuit and the high electric potential which output the electric potential where unevenness differsDoing, transmitting the differentiating circuit, to continue another gate fluid, the lineThe spuare wave which makes pumping operation halt anarogusuitsu which is formedWhen it has chi, the said analog switch is the above-mentioned low voltage,It does not continue the said gate fluid and it makes continue operates the pumpIt is constituted the way.