what's the tolerance of high voltage pulse for mains voltage input

[Henry_Hua]

Dear Colleagues

We have one customer who will use our XLI+XVR solution. And customer told us their grid is not good and  recorded some high voltage pules in the mains input side.  the volrage is 1400V, and the duration is 0.010 ms.

So customer is asking what's the tolerance of high voltage pules for our XLI+XVR. what's the max. voltage and duration? thank you!

Best Regards,

Henry

[Drives_Uwe]

We require

See documentation.

[Henry_Hua]

Dear Uwe,

thank you for your reply. we know this main data and relvant tolerance. but customer want to know what's the instantaneous high voltage(like 0.01 ms) ctrlX Drive allows.

or the 500*(1+10%)=550V is the maxium tolerance whatever it's instantaneous or not?

BR Henry

[macmotor · Accepted solution]

For such drive & control type of equipment one cannot seriously define a "tolerance range" for the transient voltage spikes on your customer's mains supply. Such surge voltages are basically a threat to all electrical equipment in that factory and will cause more rapid ageing and sooner or later -or instantly- damage the equipment. Which is then of course not covered by any product warranty.

So the question should not be, how much suffering the devices might be able to bear, but how to prevent and take control of such problems and thus keep up availability of the production equipment. Common practice would e.g. be to install transient surge protection devices (SPD), which are available as standard catalog products from all major manufacturers.