9. Coolant system
279
9.7.2 Description
(1) Characteristics
1) Discharge at lift : 0 m discharge capacity : 20 liters/min. or greater.
2) Automatic feeding height : 1 m or greater
(Limit for automatic feeding height: new pump with inside parts wet, approx. 2 m)
3) Automatic feeding time : 2
-5 seconds.
(Limit for automatic feeding time: new pump with inside parts wet, approx. 1 second.)
4) Automatic stopping : Air intake causes negative pressure triggering automatic stopping.
(2) Insulation
1) Insulation resistance: 500V with a megatester when the difference between the continuity point and
the body is 1MΩ or greater.
2) Insulation proof stress: AC50 between the continuity point and the body, or 60hz 500V for 1 minute
when impressed current leakage is 10 mA or lower.
(3) Durability
Rated voltage when there is 3% salt water 60L + engine oil 3%, and operation is at 1800 cycles and
there are no difficulties.
(4) Vibration proof
Amplitude 0.51 mm (one side of the amplitude)
Vibration frequency 10-55 Hz
Sweep time 90 seconds.
Direction of vibration each direction 4 hours
No difficulties after test period
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