(a) Failure of discharge valve to open or to close within predetermined time (incomplete sequence). Applicable if there is an automatic pump control valve.

(b) Motor overload (for medium voltage motors, thermal overcurrent, ground fault and phase sequence/undervoltage).

(c) High bearing temperature (applicable for pumps 500 hp and above).

(d) No discharge flow (pump failure, sensed by flow switch on discharge side) (if considered necessary).

(e) Excessive vibration (if considered necessary).

(f) High pressure (in the event the system pressure should exceed a predetermined maximum level).

(g) Pump floor flooding (if considered necessary).

The pumps shall also be shut down, but not locked out, in case of low suction, as sensed by the reservoir low level sensor or electrode type water sensor in the suction line. (28-ME-DG-02 § 23.9)