Can the SDE contact of Masterpact MTZ breaker be activated without primary injection or secondary injection (Automatic Trip Curve Test)?

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Yes.

Please see below details from Masterpact MTZ User Guide (DOCA0101EN) which describes the ‘Force Trip’ function using the EcoStruxure Power Commission (EPC) Software. This activates the SDE contacts.

Please note that this ‘Force Trip’ feature is only available for Masterpact MTZ breakers when the Micrologic X trip unit of Masterpact MTZ breakers is directly connected to a computer via USB connection only.