Installation and maintenance of asphalt plants electrical control system

1, Make well the electrical system ground ( or receive zero ) protection, and make well the whole machine lightning protection grounding and sensor shield grounding, from the power supply, if the power supply using the TT system, When installed the asphalt plant,the metal frame and control room's Electrical cabinet shell of asphalt plant are doing grounding protection. If the power supply using the TN-C system, when installed asphalt plant, the metal frame and control room's electrical cabinet shell of asphalt mixing plant should do grounding protection and access to zero reliable, this way not only achieve a asphalt plant conductive framework protect access to zero, but also to achieve a asphalt plant repeated electrical system neutral grounding. If the power supply with TN-S ( or TN-CS) system, when we installed asphalt batching plant, grounding and access to zero metal frame and control room's electrical cabinet of asphalt batching plants. Regardless of the kind of power supply system , do the grounding resistance of grounding point that is greater than 4Ω. In order to prevent asphalt plant lightning hazards, when installed asphalt plant, must be installed lightning rod in the highest point of asphalt plant, and all parts of asphalt plant must be in the effective lightning rod protection zone. the Lightning rod ground deflectors must be adopt a cross-section of not less than 16mm2, When installed asphalt plant must be have insulation protection, Copper skin, ground stations to be set up in other ground from asphalt plant at least 20m away where no pedestrian or facilities, and to ensure this grounding grounding resistance 30Ω or less.
When installed asphalt plant, but also to do all sensors shielded wire grounded reliable, the ground can link the ground deflectors of control unit, but the ground is different from the previously mentioned protective ground point and anti- Ray grounding point, leaving this ground to protect the ground at least 5m away from the straight line, grounding resistance is not greater than 4Ω.

2, do well the commissioning work carefully
When asphalt plant initial assembly, commissioning work may need to spend a lot of energy and time, as may be found in debugging a lot of problems, such as wiring errors, component or control unit parameter setting is inappropriate, improper installation location component, component damage, etc. reasons, specifically what is the reason, it is necessary to correct or adjust in accordance with the drawings, the actual situation and the test results.
After asphalt plant main part and electrical system installed, to do serious debugging work, starting with a single action manually controlled single motor load commission, if have problem do check the line and electrical components whether or not normal, if a single action single motor test action are normal, you can enter part of the unit controlled manually or automatically load commission, if are normal, then enter the full automatic load test. after work done, then do the whole machine with load test machine. after completed commissioning work, it can be said that the basic asphalt plant installation work has been completed, asphalt plant has already have a production capacity.
3, do well done temperature regulation of control room, often cleaning electrical components and external unit dust, check electrical components frequently, and do well done the maintenance work of mechanical transmission part. 
The control room of asphalt plant is the electric control syltem core, if the control room temperature is too high, it will affect the electrical components and systems normal work reliably, so to adjust the control room temperature. Since the largerdust of field, which have a greater impact with relays, contactors and other electrical components work reliably, so regular cleaning dust from various parts of the electrical components. In order to make the various mechanical transmission of asphalt plant can operate normally, to timely manner lubrication of mechanical transmission part.