Huanyang VFD, how to get Waterpump switching on with UPF/DRV/DCM connectors?

[chefffe]

The maker of the program "Estlcam" mentioned that in a german forum:
https://cncwerk.de/forum/viewtopic.php?t=611

Here is the same info:
http://cnc.a-ueberbach.de/spindle/al...schalter_fircd

Translated with Google:
Residual current circuit breaker (FI / RCD)

In the case of a fault, DC residual currents with low residual ripple or high-frequency pulsating fault currents can occur in frequency inverters, which do not recognize the residual current circuit breakers normally installed in a domestic installation (FI type A). Likewise, the possible DC components in the fault current can lead to a saturation of the coil installed in the FI and render it significantly less sensitive to alternating currents.
According to VDE 0100-530, all-current-sensitive RCCBs (also known as RCD type B) must be installed here, but this entails costs of a few hundred euros.

[Clive S]

Well I read the forum posts you linked to as the spindle is not correctly grounded (ie only through the screen) If the spindle only has a 3 pin plug then I always change that to a 4 pin and connect the 4th pin to the spindle socket screw. Then use 4 core to supply the spindle with its 3 phase and earth.

[chefffe]

Thats one thing, the other is to use the RCD Type B.

[Clive S]

Thats one thing, the other is to use the RCD Type B.

Carry on then

[Kitwn]

I'm still confident that no RCD of any type will offer protection against a shock from the output of a VFD, or indeed any other power supply which has a transformer and/or rectifier between the mains input and the output. I used to teach electrical safety (in a previous millenium!), including how RCDs work, and this was a key point which electrical/electronic engineers and technicians needed to understand, though I admit my own knowledge did not include an in-depth understanding of type A, B, C etc. devices. Having done some reading this morning I believe the differences relate to resistance to spurious tripping or failing to trip due to the presence of harmonics and other interference in the mains current waveforms which are a serious consequence of direct rectification of the mains as used in many switch-mode power supplies.
On a happier note, the 2.2kW water cooled spindle I recently bought from the Hunag Yang Store on Ali Express already has a four pin plug with the case connected to pin 4.

Kit

[chefffe]

My Spindle also had 4 pins connector but Pin No. 4 was not connected. Of course I did that as well. To ground the spindle is a must, to use this RCD type might not be 100% a must for hobby CNC but regarding VDE it should be used with any VFD. In case of a fire, it might be an issue with insurance maybe ... but thats the decision of everybodys own.