What is the starting method for a 22kw motor?
Thread Content
There is a 22KW motor used for mixing; what is a better starting method – star-delta or direct start? I’m not sure if this counts as overload – can the star-delta starter be activated? Thank you
Star-delta starting is possible; first, check what capacity your transformer has. Generally speaking, 22 KW corresponds to a small motor, and direct starting is no problem as it reduces the number of potential failure points. Although the mixer is also considered a heavy-duty device, its gearbox provides significant speed reduction, so the torque reaching the motor side isn’t that high.
Look at the transformer capacity; it should generally not exceed 20% of the transformer’s capacity. A 22KW unit should be able to start directly.
Where are the transformers? Which is faster, a star or a triangle? Isn’t the starting current independent of the load?
22. . . Can it be started directly?
Is there a version without an inverter for driving the mixer? ? 22kw isn’t considered high either; it should be able to start directly
It mainly depends on the capacity of your transformer; if it exceeds 20% of the transformer’s capacity, a reduced-voltage starting method should be used. If the transformer has a large capacity, direct starting is sufficient. Star-delta starting is used for light-load startups; if the startup load on the mixer is high, consider other voltage-reduction starting methods.
A 22KW motor is not considered to be under heavy load; the key issue is whether the motor needs to start under load. If so, it is recommended to use a star-delta starting method.
1. If there is a reduction gearbox on the load side of your motor, you can start the motor directly. 2. If there is no reduction gearbox, it is advisable to use star-delta starting, frequency-sensitive reactor-based voltage reduction starting, soft starter starting, or inverter starting.
If starting under load, it’s necessary to do some calculations first. We all know that during star-delta starting, the torque at the beginning is only one-third of the normal value; the key question is whether this one-third torque is sufficient to drive the load Since yours is a mixer, you can calculate based on the operating principle of the mixing equipment and then decide how to start it.
Small motor – just supply power directly! ! ! Generally, motors of this size are part of a motor group, and auxiliary starting devices such as soft starters are used for them.
It can be started directly; however, when it is located far away from the transformer, the startup time takes a bit longer.
Straighten up such a small motor.
In our factory, 320KW units start up directly.
The person upstairs can’t be from the same department as me, right? I have seen 300kw models with direct start, and I have also designed 280kw models with direct start. All the transformers are 1250… there are 2 of them: lol 22kw is considered a small motor. In the vast majority of cases, it can be started directly. Adhering to the principle of keeping it at no more than 30% of the transformer’s capacity ensures that the voltage drop remains within 15–20%. This is how I understand the blender the original poster is talking about. These days, many precision manufacturing processes emphasize speed control; you can ask if your process has any requirements regarding speed control. If available, use direct frequency conversion. The data is sent directly to the backend, which serves multiple purposes; P can reduce the impact wear that occurs during device startup.