Performance Criterion 1: Contact Pressure
In photovoltaic energy terminal terminals, contact force is one of the basic elements. If there is not enough contact pressure, no matter how good the conductive material is, it will not help. Because, if the contact force is too low, there will be displacement between the wire and the conductive sheet, resulting in oxidative pollution, increasing the contact resistance and causing overheating.

Performance Criterion 2: Voltage
The size of the voltage drop at the contact point is also one of the criteria for identifying the quality of the terminal block. Even with a small force distance applied to the screw, the value of the voltage drop is still well below the limits required by VDE0611. At the same time, the applied torque varies over a wide range and the voltage drop is almost constant. Therefore, although the torque used by different operators is different, it will not affect the quality of the connection.
Performance Criterion 3: Self-Locking Function
During the tightening of the screw, the threaded tongue on the crimping frame springs upwards, thereby creating a reaction force against the screw. Changes in wire diameter due to temperature are offset by the elasticity of the crimping frame itself, so there is no need to tighten the screws again.