Diesel generator failure protection circuit

by:Jet Power     2020-12-03
( 1) High temperature protection water temperature sensors installed on the cooling water outlet pipe, the water temperature gauge on the meter indicates the NT series diesel engine cooling water temperature of cooling water temperature is normal ( 74 ~ 91) ℃. When the cooling water temperature higher than 106 ℃, the temperature t close contact, through intermediate relay circuit of Q3, Q3 electricity or absorption, and through its own auxiliary contacts Q3 self-locking, Q3 normally closed off contact Lord, fuel shut-off solenoid valve FSV circuit, FSV release, fuel oil supply oil truncated, automatic stop of diesel generators, and protection. ( 2) Low oil pressure protection NT series diesel engine lube oil pressure of the road, when idle for ( 34. 3-137) Is 274 kPa, rated speed. 4-519. 4) kPa。 If oil pressure is too low, poor lubrication can make the moving parts, even without lubrication, wear, shorten service life. Therefore, this unit has the function of low oil pressure protection. Oil pressure by oil pressure sensor for testing, P dashboard oil pressure gauge indicates the high and low oil pressure. Uranium when oil pressure is lower than 127 kpa pressure relay released, their contact P disconnect, fuel shut-off solenoid valve FSV circuit, FSV release, fuel oil supply oil truncated, automatic stop of diesel generators, the same protection. ( 3) Overspeed protection on diesel engine operation process, if there is a speeding, namely the speed higher than 1725 r/min, the speed of electronic switching circuit to detect the speed signal, at this point, the relay IRC and speeding, the normally closed contact IRC disconnect, fuel shut-off solenoid valve FSV power circuit, so as to cut off fuel pathway, diesel engine automatic stop.
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