What are the characteristics of tractor circuit?
To use, operate and maintain a tractor, it is necessary to know the line characteristics of the tractor.
1. The electrical equipment of all tractors is connected by single wire, and the other end is grounded.
2. When the shunt excitation DC generator and the battery room work in parallel, the connection between the two power supplies is through the regulator, and all electrical equipment is connected to the power supply after parallel connection.
3. All electrical equipment whose instantaneous power consumption exceeds or is close to the range indicated by the ammeter and whose frequency of power consumption is relatively frequent shall be connected in parallel before the ammeter so that the current passing through these equipment does not pass through the ammeter.
4. All lighting, instruments, electromagnetic starting switches, preheaters and other electrical equipment are connected behind the ammeter and connected in parallel with the charging line through the main power switch.
5. When the generator is not working, all electrical equipment is powered by the battery. Except for the starting current, other discharge current basically passes through the ammeter. When the generator works normally, the generator not only supplies power to all electrical equipment, but also charges the battery. At this time, except for the charging current passing through the ammeter, other electrical current does not pass through the ammeter.
6. The grounding polarity of the line is usually based on the grounding polarity of the generator. In the circuit using DC generator, the positive pole is often grounded; When silicon rectifier generator is used, it is generally grounded to the negative pole.
7. For the circuit with positive grounding, the "+" terminal of the ammeter is connected to the negative lead of the battery, and the "-" terminal of the ammeter is connected to the "power" terminal of the circuit master switch. The negative grounding circuit is the opposite.
