A rule of thumb in industry to measure the decrease in motor life expectancy is that for each 10 degrees centigrade of operating temperature increase, the life expectancy of the motor insulation decreases by 50%.
A fairly comprehensive, microprocessor based solution to protect expensive motors is offered by E-Labs. MP380 provides the much needed monitoring of the supply before starting the motor and while it is running.
TECHNICAL SPECIFICATIONS
Main Supply : Phase to Phase
Under-Voltage Selection : 330,340,350,360
Over-Voltage Selection : 415,430,445,460
Power Consumption : 1 watt
Dropout time : 2.5 seconds (Adjustable)
Pickup time : 3 seconds
Relay contacts : SPDT. Type, 250VAC 5Amps
Housing : Plastic casing
Unbalance : Dropout at 11% and reset at 6%.
