If Masterpact MTZ is a 3 pole breaker and you use External Neutral Current Transformer, so remove the jumper from T1 T2 and connect CT wires on terminals.
If you do not use ENCT T1 T2 must be shorted.
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If Masterpact MTZ is a 3 pole breaker and you use External Neutral Current Transformer, so remove the jumper from T1 T2 and connect CT wires on terminals.
If you do not use ENCT T1 T2 must be shorted.