dear marke:

Now a lot of energy-savers for lightly loaded motor and electricity distribution networks, but many energy-saver are not so good , and product quality is low, so we must regulating the makets of energy-saver,and protect the consumer's benefits. so we must issue the national standards for these energy-savers,and these energy-savers must be tesed in lab before it propagation in the maket.
so I want to ask if there are test standard for these energy-savers in your country?

thank you
best regards

Hello yhg

Welcome to the forum.

I am not aware of any specific standards that apply to energy savers for induction motors as such, rather they are normally just covered by the motor controller standards such as IEC60947.4 (I think that is correct!!) This does not include any tests for quality of components etc, it is more of a safety standard. Neither does it refer to/measure the ability to save energy.

I believe that if there were independent tests done on the ability to save energy to the manufacturers claims, all (or most) would fail due to unrealistic claims except under extreme circumstances. - There is no magic bullet on these devices due to the efficiencies of induction motors except for small single phase motors and motors that are well overfluxed. (motors that do not meet modern standards.)

Best regards,

I cannot think of any specific standard besides IEC60947.4 either.

Sometimes the quality of those products are low because the unrealistic claims of those manufacturers, that's true. But I think some people picking the wrong model or have little knowledge in this field, is also a huge problem.

By the way, this forum is pretty nice!