Yes the Acti 9 4 Pole iID RCCBs can be wired for 3P without neutral.
You can directly connect the 3 phase on 3 poles of iID RCCB, you don't need to add a resistor since the test button circuit is not connected to the neutral pole but connected between 2 phases as shown in the below diagram.
For more information please refer to the Acti 9 technical catalogue: https://download.schneider-electric.com/files?p_Doc_Ref=SAUM9XED1130718&p_File_Ext=.PDF
You can directly connect the 3 phase on 3 poles of iID RCCB, you don't need to add a resistor since the test button circuit is not connected to the neutral pole but connected between 2 phases as shown in the below diagram.
For more information please refer to the Acti 9 technical catalogue: https://download.schneider-electric.com/files?p_Doc_Ref=SAUM9XED1130718&p_File_Ext=.PDF
Released for:Schneider Electric Australia
