The winger has joined Wolverhampton Wanderers on loan until the end of the season.
The winger has joined Wolves on loan until the end of the season, with Jackett moving quickly to secure him to help boost his side’s hopes of pushing further up the table.
His capture has come as something of a surprise, given he has made 22 appearances for the promotion chasing Owls so far this season.
And Jackett has now explained his decision to move for the player, saying he helps to give his side natural balance in the left hand side of his team.
He’s an attacking player and has a lot of pace and power, which is something we need in either position. We're very pleased to add him,” he told wolves.co.uk.
“He gives us natural balance on the left side, we’ve had a considerable amount of injuries down there.”
"He can play wide left or at left back. I think he’s capable of both and he’s comfortable in either depending on the system that you play."
Jackett will now be hoping Helan can help his side turnaround an alarming run of form over the last two months.
His side are without a win in seven games, with them having failed to pick up all three points since the 3-2 win over Fulham on January 12th.
That sees them sitting 15th in the table, just eight points away from the drop zone, a gap that could be seriously reduced if their current form continues.