How long does it take for a motor to trip due to overload?
Thread Content
The excessive flow rate from the pump causes the motor to overload and shut down. May I ask, how long does it take for the motor to shut down due to overload? ? Is this issue mentioned in the pump’s data sheet? ?
The motor tripping due to overload has nothing to do with time; it is related to the magnitude of the overload current. The setting value for the thermal relay used for motor overload protection is 1.1 to 1.5 times the rated current, and once the current reaches this level, the motor will trip.
It depends on the settings of your timer; it’s usually around 5 seconds
Reply to 2# mmhsz321: But in order to eliminate the impact of instantaneous values on the motor, there should be something like a timer.
Reply to 3# modouyu123: Do you have any materials on this topic?
Reply to 5# 4683557good: You can check GBl4048.4—93; the relevant information is not available either
The compressors in our factory are motor-driven, and they have a current overload delay protection of 15 seconds; this value can be adjusted according to specific circumstances
Reply to 6# modouyu123: This standard cannot be found online; it’s frustrating. Do you have it? Could you send me one? Thank you, email 4683557good@163.com
I really don’t have this; you can ask someone who specializes in electrical matters for advice, hehe!
It seems there isn’t a clear specification regarding the time
The operating principle of the motor overload thermal protection element features a reverse-time characteristic: within the set range for protection activation, the greater the current, the shorter the time; the smaller the current, the longer the time. The specific tripping protection time is set by the manufacturer of the thermal element during production.