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At trip position what the state of the OF aux ( open state or close state ) For NSX circuit breakers ?

OF (ON/OFF): indicates the position of the switch-disconnector poles. 

You have several ways to connect an OF auxilliary contact as there are 3 contacts to allows the customer to choose the info he wants according the state of the switch-disconnector or breaker. 
Kindly check Picture (1) 

(extract from NSX user guide DOCA0140EN-00 04/2018 page 71). Please refer to attached extracted document. 

B group shows that you have 2 possibilities for OF contacts. 
For a breaker closed, OF can be closed or opened 
Once we have a trip, the breaker is considered by the OF contact as open. 

Kindly check Picture (2) 

If A is in OUT (like the photo): 
Electrical contact between 1 and 4 
No electrical contact between 1 and 2 

If A is in IN: 
Electrical contact between 1 and 2 
No electrical contact between 1 and 4 
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