How to find out the circuit fault of telescopic arm excavator
Circuits can be divided into single-line and double-line systems. To explore such a large mechanical telescopic arm is a single-line system. Faults will occur in the single-line system, which will affect the normal operation of the stop. Next, we will study the troubleshooting methods of digging out the telescopic boom circuit problems.
In the case of fuse failure or automatic circuit breaking maintenance, there are alternating current motors, switch on circuit switches, and electrical equipment can not work properly.
There are three reasons for this defect: first, the plug is loose, lost or polluted in the circuit; second, the switch contact oxidation failure or the unreal application of iron on the third or air lines.
Short circuit current:
Failed to turn off circuit switch or circuit switch, fuse, automatic maintenance switch, wire heating and extinguishing. Faults are usually caused by the damage of local electrical insulators, resulting in the contact between the power cord and the body. There are two ways to check short circuit: one is OMMI test, the other is fuse test.
Ohmmeter method: cut off circuit switch, take out fault circuit fuse, ohmmeter take 1 meter iron and 1 meter broken wire. If there is a small indicator circuit in the master meter, it can be used to measure the resistance or to track the detection point of the fault point. If the resistance value is measured correctly in the master table, follow back and check section a.
Test the fuse method: first set the electrical switch off, then try the fuse holder at both ends; 2. On the wharf, light the lamp, and then turn off the circuit switch. If the pilot lamp, short-circuit fuse and device switch are not on and connected to the indicator lamp of the electrical switch, the short-circuit between the electrical equipment and AC is indicated.
In order to accurately determine where to sew the short part. If the pilot does not open the back, point out the shortcomings after opening, and vice versa, and then flip. To facilitate memory, the method can be summarized as: connecting the test lamp, instead of the broken fuse, which is connected by alternating current, and connecting step by step; removing the stitches and headlights. This is wrong.
If the number of fuses is 1 or the number of parallel branches is controlled by automatic maintenance switch, all switch lines should be removed, and then each branch connection line will collide with the wharf one by one. If you touch and take a piece of paper, try to dim the lamp (test lamp and electrical equipment in series, current decreases), branch short circuit fault if the test lamp is good, indicating a short circuit.
Poor contact with telescopic arm of PC400 excavator, red light bulb, weak motor, large current circuit, sometimes even cause head or ablation. This problem is generally due to improper plug connection resulting in poor welding and poor wire contact oxidation. There are two ways of checking: one is OMMI test, the other is light test.
Ohmmeter test: disconnect the main switch, check the circuit switch, and measure the contact resistance with the ohmmeter.
Test lamp test: check circuit fuse disconnection or disconnection of automatic maintenance switch, test lamp connected to fuse or two terminals, automatic maintenance of disconnection circuit switch and power control switch installation, while using a line contact to check, can increase light, and then poor connection.
Above is the way to find out the circuit breakdown of telescopic excavator. Shandong Dongying Bocheng Excavator Rental Company provides long arm excavator and extended arm excavator service. If you need, please call us for consultation. Our website is http://www.rbaras.com.