Phase Sequence Meter Wiring Measurement Method and Phase Loss Problem
For the connection measurement method of the phase sequence meter and the problem of lack of phase, connect the three test leads of the phase sequence meter to the three lines of the source to be measured, and the correct use of the lack of phase indication and phase sequence indication, etc. Before opening the case, Be sure to cut off the power.
Phase sequence table wiring measurement method
1. Wiring
Connect the three test lead lines A (red, R), B (blue, S), and C (black, T) of the phase sequence table to the three lines A (R), B (S), and C (T) of the source to be measured, respectively. on-line.
2. Measurement
Press the measurement button on the upper left corner of the meter, the light is on, and the measurement is started. The measurement stops when the measurement button is released.
3. Phase loss indication
The three red LEDs A, B, and C on the panel respectively indicate the corresponding three-phase incoming calls. When the measured source is out of phase, the corresponding LED does not light up.
4. Phase sequence indication
When the three-phase sequence of the source under test is correct, the green light corresponding to the positive phase sequence is on; when the three-phase sequence of the source under test is wrong, the red light corresponding to the reverse phase sequence is on, and the buzzer sounds an alarm.
Note 1: Positive phase sequence means UA0, UB0, UC0 (or UAB, UBC, UCA) lag by 120 degrees in sequence; reverse phase sequence means UA0, UB0, UC0 (or UAB, UBC, UCA) lead by 120 degrees in sequence.
Note 2: To change the reverse phase sequence to the positive phase sequence, just exchange any two of the three wires A, B, and C.
Note: When any one of the three-phase input lines is connected to electricity, the meter is charged. Be sure to cut off the power before opening the case.
1. Powered directly by the power supply under test, no battery required.
2. With phase loss indication function: the three red light-emitting diodes A, B, and C on the panel respectively indicate the corresponding three-phase incoming calls. When the measured source is out of phase, the corresponding LED does not light up.
3. Use sound and light as phase sequence indication: when the three-phase sequence of the source under test is correct, the green light corresponding to the positive phase sequence is on; when the three-phase sequence of the source under test is wrong, the red light corresponding to the reverse phase sequence is on. The light is on and the buzzer sounds an alarm.
