Current location - Plastic Surgery and Aesthetics Network - Plastic surgery and beauty - What symbol is used at the beginning of tn-s when drawing the schematic diagram of motor forward and reverse rotation?
What symbol is used at the beginning of tn-s when drawing the schematic diagram of motor forward and reverse rotation?
Phase line (L 1, L2, L3) and neutral line (n).

1, phase line (L 1, L2, L3): the letters L 1, L2, L3 are used to represent the phase lines of three-phase power supply, which correspond to the main winding, auxiliary winding and male terminal of the motor respectively.

2. Zero line (N): The letter N is used to indicate neutral line or zero line, which is the grounding line required for the normal operation of the motor.