High-Voltage Phase CheckerUsage:
1; First, hang the X and Y collectors on the same high-voltage line respectively. The host display should show X and Y in phase.
2; When checking phase on high-voltage lines, arrange the X and Y collectors as follows: AA′ same phase 000°左右, AB′ different phase 120°左右, BB′ same phase 000°左右, BC′ different phase 120°左右, CC′ same phase 000°左右.
3; To obtain the * value, keep one collector at a collection point on the high-voltage line, and move the other collector around another collection point on the high-voltage line front, back, left, and right to find the zui* phase angle.
4; During phase checking, if the test data for AA′, AB′, BB′, BC′, CC′ all show different phases, it is because the two tested power supply lines have different wiring groups, which may result in a phase difference of 30 or 60°. The following describes the measurement standard in this case (taking 30° phase difference as an example): The test method is the same as ① and ②, and the results should be: AA′ different phase 30°, AB′ different phase 120°, BB′ different phase 30°, BC′ different phase 120°, CC′ different phase 30° (Note: 120° and 240° only indicate positive or negative phase sequence)
5; When measuring ≥10KV, X and Y can be directly placed on the conductor or insulation layer for phase checking.
6; When checking phase at ≥66KV, the X and Y collectors can use contact or non-contact methods. (For example, when measuring 110KV and 220KV, place the X and Y collection heads 300mm to 1000mm below the high-voltage wire. When measuring 500KV, place the X and Y collection heads 1000mm-2000mm below the high-voltage wire, with an allowable deviation of 300mm left or right.)
7; Phase sequence measurement: Assume a certain line is phase A. Place X on phase A and Y on another phase. If it displays 120°, it indicates a positive phase sequence, and that phase should be "B". If it displays 240°, it is a negative phase sequence, and that phase should be "C".
8; Voltage detection: Hang one collector on the high-voltage wire. If the host screen displays the corresponding collector symbol, it indicates that the high-voltage wire is energized.
