Step 1: Strip the wires
The stripping length is 6~7.5mm, and the number of copper wires cut in the stripping process is no more than 5. It is recommended to use professional strippers to ensure stripping quality.
Tool recommendation: PV-AZM wire stripper
For conductors with a cross-sectional area of 1.5mm2, 2.5mm2, 4mm2, 6mm2, and 10mm2, with inserts (marked with the cross-sectional area), with length locator.
Step 2: Crimp
Open the well and hold the clip, place the metal core in the appropriate cross-sectional area, with the opening facing up, press until the door touches the crimping die, then insert the stripped end of the cable until the insulation of the cable handles the crimping core, and then fully crimp.
Qualified crimping should have no broken wires, missing wires and burrs in appearance, symmetrical left and right, and correct front and rear positions of copper wires. Taking a 4mm2 cable as an example, the IEC 60352-2 standard requires a pull-off force of at least 310N and a crimp resistance of less than 135μΩ for the open crimp ends of metal pins on the market.
Tool recommendation: PV-CZ crimping pliers
Easy to operate, the metal core can be automatically returned, and the crimping efficiency is high. Inserts (marked with the cross-sectional area) and positioning blocks can be replaced as required. The crimping quality is reliable, and the crimping resistance is small and stable.
Step 3: Insertion
Insert the cable end into the insulator, and you will hear a "click" when it is in place, pull it in the opposite direction to confirm the connection is reliable, and then use a wrench to tighten. Finally, plug the positive and negative connectors into each other and hear a "ding" sound to indicate that they are in place.
Although photovoltaic connectors account for a low proportion of the cost of photovoltaic power plants, they are vital components and should still be given enough attention. Reliable quality photovoltaic connectors and correct installation methods ensure the regular and stable operation of photovoltaic power plants.