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jtw/Bennetselec,
The fundemental operating principal of these devices means that they can cause interference to the mains supply.
The load they present to the mains is non linear, think switched mode power supply and you will be on similar lines.
jtw,
We had a manufacturing facility and support int he States and we often had to send guys over from the UK or Germany to sort these sorts of problems and it was rare they were caused by our kit. (NOT DANFOSS I hasten to add, but a competitor)
There are EU wide standards that have to be met along with the EMC & LVD in the EU, which the EU kit does for CE mark.
Not saying that US kit is not of a similar standard, however, it was always weakness in the supply infrastructure IIRC that caused the US problems.
Bennets,
I did not realise that we were up at 75kW, nor that we were talking about supply cable harmonics alone.
The way I understood it to date was overheating of supply side cb's though no confirmation yet.
Overheating of the motor side cabling?
Anyone, is this the case, or is all the "damage" one side, if so which side?
Crusty,
I trust they are GXD/CXT or is it AXT type, I only use GXT type but there is another as well.
Please don't use stuffing glands or skintops.
16mm 4c may be more than is needed, what are the motor details?
What are you pumping?
Why inverters, do you have closed loop control back to the inverters for flow or pressure?
Or, are they just glorified soft starts?
Have you/can you monitor start up performance?
Do they have a duty cycle or are they S1 & used continuously?
The fundemental operating principal of these devices means that they can cause interference to the mains supply.
The load they present to the mains is non linear, think switched mode power supply and you will be on similar lines.
jtw,
We had a manufacturing facility and support int he States and we often had to send guys over from the UK or Germany to sort these sorts of problems and it was rare they were caused by our kit. (NOT DANFOSS I hasten to add, but a competitor)
There are EU wide standards that have to be met along with the EMC & LVD in the EU, which the EU kit does for CE mark.
Not saying that US kit is not of a similar standard, however, it was always weakness in the supply infrastructure IIRC that caused the US problems.
Bennets,
I did not realise that we were up at 75kW, nor that we were talking about supply cable harmonics alone.
The way I understood it to date was overheating of supply side cb's though no confirmation yet.
Overheating of the motor side cabling?
Anyone, is this the case, or is all the "damage" one side, if so which side?
Crusty,
I trust they are GXD/CXT or is it AXT type, I only use GXT type but there is another as well.
Please don't use stuffing glands or skintops.
16mm 4c may be more than is needed, what are the motor details?
What are you pumping?
Why inverters, do you have closed loop control back to the inverters for flow or pressure?
Or, are they just glorified soft starts?
Have you/can you monitor start up performance?
Do they have a duty cycle or are they S1 & used continuously?