General requirements for installation and commissioning of low-voltage switchgear

General requirements for installation and commissioning of low-voltage switchgear

 4. General requirements

   4.1 The assembly of the low-voltage switchgear must meet the requirements of the main wiring diagram.

   4.2 The electrical clearance and creepage distance between the conductors of different phases in the low-voltage switchgear shall meet the requirements of Table 1.

 

table1

Maximum value of rated working voltage to ground,V	Rated impulse withstand voltage,kV	Electrical clearance,mm	Creepage distance,mm
300	4	3	6.3
600	6	5.5	8.0
1000	8	8	12.5

 .3 The distance between the main busbar and the branch busbar and the ground shall be greater than 25mm.

   4.4 The electrical components in the product or the leads of the terminal block should be no less than 250mm from the base surface.

   5. Process equipment

   5.1 Read the product drawings and technical standards in detail, understand the requirements of the main wiring (scheme) drawings, and obtain the spare parts, electrical components, general components, fasteners and signs according to the product drawings.

   5.2 Check whether the electrical components obtained meet the requirements of the product circuit diagram (or wiring diagram), and whether the performance of the electrical components and their accessories meet the requirements.

   5.3 Each electrical component should have a factory certificate and instructions for use copper busbar machine, keep it in good condition, and put it in a plastic bag together with technical information, so that it can be sent to the orderer with the equipment.