Frequently Asked Questions
For the 3 Phase Variable Speed Drives, the RCD type B or type B-Si is particularly suitable.
It protects against fault currents with DC offset, which is true for three-phase power converters. In addition, it has enhanced immunity against nuisance tripping caused by:
EMC common mode filters connected upstream VSD.
Type B has a tripping delay allowing the inrush current to flow on power up.
The permanent switching leakage currents existing in power converters (ex: 25kHz).
Type B include a "low pass" filter to ensure a trigger threshold which increases with frequency while complying with the personal protection curve (fibrillation).
Please note: if the required sensitivity is 300mA, Selective type RCD should be proposed ensuring a non-triggering time of 50ms.
More information can be found on the Earth Fault Protection guide: https://download.schneider-electric.com/files?p_enDocType=Catalog&p_File_Name=CA908066E+%28web%29.pdf&p_Doc_Ref=CA908066E
With regards to installation of these RCDs, they are mounted upstream of the Variable Speed Drives.
See below example
Schneider Electric offers Acti9 iID range of 4 Pole RCDs type B available in 30 mA sensitivity and type B-Si available in 30 and 300 mA sensitivity (Selective type is available)
Click this link below to view the complete range of Acti9 iID RCDs available in Australia: https://www.se.com/au/en/product-range/7559-acti9-iid/?filter=business-5-residential-and-small-business&parent-subcategory-id=1620
PDL used to do a complete unit - The 695SP however, this is now obsolete. A Surge Protection Outlet can be made up of parts. You will need to use one of the sockets that have an extra switch space such as the 694X or the 695X and replace the extra switch with our Surge Protection Module, the 600SM.
The part number is A9N26948