Quotation for Material of Explosion proof Power Box for 380V Stainless Steel Welding Machine

Quotation for Material of Explosion proof Power Box for 380V Stainless Steel Welding MachineTechnical Requirements:

1.1 Configuration of primary components in the maintenance box

Select products certified by 3C and CQC, and use miniature circuit breakers for three-phase circuit breakers with incoming circuit currents less than or equal to 63A.

The electrical components inside the box, such as low-voltage circuit breakers, air switches, sockets, etc., must have performance in two domestic power plants with a capacity of 600MW or more; The socket current is selected as 63A; 32A.

1.2 Cabinet frame and shell

1.2.1 The cabinet frame and shell have sufficient strength and rigidity to withstand external forces, as well as the dynamic and thermal stability generated by the installation of components and short circuits. At the same time, the performance of the equipment will not be affected by the lifting, transportation, and other situations of the complete set of equipment.

1.2.2 The protection level of the shell shall not be lower than IP55.

1.2.3 The maintenance box shall be made of stainless steel material, with a matte surface treatment and a plate thickness of 2.0mm. The protection level shall not be less than IP55.

1.2.4 The metal plate of the box body shall be reliably connected to the protective grounding soft copper wire (not less than 50mm2), including between the box door and the box body. The insulation partition inside the box will not break and a reliable grounding terminal will be installed.

Quotation for Material of Explosion proof Power Box for 380V Stainless Steel Welding MachineMain and branch lines

1.3.1 The main line, branch lines, and joints shall be insulated.

1.3.2 The wire is made of copper material with high conductivity. When using bolt connections, anti loosening measures should be taken for each bolt connection.

1.3.3 The insulated wires inside the box are made of copper. After correction, the current carrying capacity of the wire still has 1.3 times the working current of this circuit.

1.4 Wiring

1.4.1 The rated voltage of a terminal shall not be less than 500V, and the rated current shall not be less than twice the working current of this circuit. Each terminal block is labeled with a number.

1.4.3 The wires of the circuit inside the box are laid in trunking.

1.4.4 Open the door in front of the box.

1.4.5 The box body needs to consider setting sufficient wire outlet holes (sealed type) up and down, which can lead out wires without affecting the closure of the box door. The box is reliably connected to the grounding flat iron through a grounding soft copper wire (not less than 50mm2).

1.4.6 The surface of the box is smooth and even.

1.4.7 There is sufficient space inside the box for easy maintenance of components and connection of cables.