You mean 240v in two phases right? not the 230v single phase used in most of the world. So you can't use a meter designed for a single phase.

You can try to use only one phase from that connector to power some miners and the second phase with the other miners.

for illustrative purpose: https://i1.wp.com/makezine.com/wp-content/uploads/2016/10/figure_9.jpg?resize=620%2C366