China Best Design Double Beam Eot Workshop Use Heavy Loading Capacity Gantry Crane
Installation of crane electrical equipment 2.2.1. Installation, adjustment and installation of electrical equipment shall be carried out in accordance with the electrical schematic, wiring diagram, electrical general diagram and relevant electrical equipment installation regulations, with...
Installation of crane electrical equipment
2.2.1. Installation, adjustment and installation of electrical equipment shall be carried out in accordance with the electrical schematic, wiring diagram, electrical general diagram and relevant electrical equipment installation regulations, with reference to the provisions of this section.
2.2.2. Installation of the following electrical equipment is carried out on site.
(I), large and small car conductive frame, conductive and car cable conductive parts.
(III), limit switches, cabin switches and floodlights.
(IV), control panel and junction box.
(V), the gantry part is threaded and connected
(VI), each threaded pipe welding.
2.2.3. The installation position of electrical equipment such as resistors, control panels, etc., is allowed to be adjusted as appropriate.
2.2.4. The overcurrent relays in the protection cabinet should be adjusted to 2~2.5 times of the rated current of the protected motor. The adjustment value of the total overcurrent relay LJ is recommended to be the two units with the highest power among the cranes. When the motor is started at the same time, the conditions under which the relay does not operate are adjusted.
2.2.5. The wires laid in the pipe are not allowed to have joints. The outlet end of the threading pipe should be lined with rubber or nylon casing. For example, the crane used in the open air should be sealed with asphalt.
2.2.6. The beginning of all wires must be marked with the same number as the schematic. Easy to install, inspect and repair.
2.2.7. Wires with a cross-section of 6mm2 or less can be used without wires, but should be tinned.
2.2.8. The sliding wire should be straightened and the rust on the contact surface must be removed.
2.2.9. For the horizontal and vertical centerlines of the angle steel sliding line, the error of the horizontal part during installation shall not exceed ±10mm, and the error of the vertical part shall not exceed ±20mm.
2.2.10. The whole power circuit and control circuit of the crane. When measuring the insulation resistance to the ground, it is necessary to try to connect all the parts of the electrical equipment, the value of which should not be less than 0.4 megohm. When determining the insulation resistance between phases, the values should not differ too much, nor should it be less than 0.4 megohms. For example, in wet areas, the insulation resistance can be reduced to 0.2 megohms.