There may be several reasons for the high roll current in the partially driven wire section of a paper machine:

1. Excessive mesh load: If the mesh load of the paper machine is too large, for example, the pulp concentration is too high and the paper thickness is too large. , which will cause the drive roller to need to invest more current to maintain normal operation.

2. The resistance of the network segment increases: when the resistance of the network segment increases, the driving roller needs to invest more current to overcome the resistance in order to maintain the normal running speed. The increase of resistance may be caused by problems such as paper blocking, network blocking and paper sticking in the network.

3. Motor fault: There may be faults in the motor driving meshing, such as motor winding short circuit and bearing damage. These problems will lead to abnormal operation of the motor and require more current to maintain operation.

4. Power supply problem: If the power supply voltage is unstable or the power supply capacity is insufficient, the current of the driving roller may increase. This may be caused by overload of power grid, aging of power lines or failure of power equipment.

If the roller current in the drive line section is abnormally high, it is recommended to take the following steps:

1. Check whether the conductor section is blocked or stuck with paper, and clean it up in time.

2. Check the motor for faults, such as winding short circuit and bearing damage, which need to be repaired or replaced in time.

3. Check whether the power supply is stable, and repair or replace the power supply equipment in time if there is any problem.

If the above methods can't solve the problem, it is recommended to contact professional maintenance personnel or paper machine manufacturers for further fault diagnosis and maintenance. They will be able to provide more accurate solutions and technical support.