Nuclear phase test refers to the use of instruments or other means in the electrical operation of the power system to check whether the phase and phase sequence of two power sources or loops are the same. That is, in the actual operation of electricity, the measurement of phase difference. Three-phase circuit nuclear phase test must be carried out for newly built, rebuilt and expanded substation and transmission line, as well as before the line is overhauled and sent to users, to ensure that the phase sequence of the transmission line is consistent with the phase sequence required by the three-phase load of users.
Nuclear phase method of wireless high voltage nuclear phase analyzer
Before a new power station is connected to the grid and a new substation is put into operation, it is often necessary to do a nuclear phase test. The nuclear phase mentioned on site includes checking phase sequence and checking phase. Phase sequence check is mainly for the normal operation of generators and motors. In the practice of electric power production, it is necessary to check the phase sequence test before the generator is connected to the grid. If the phase sequence is incorrect, the generator cannot be connected to the grid. In the transformation of power grid, attention should also be paid to keep the original phase sequence of power grid, so as not to bring trouble to users.
For the rotor of the generator and the motor, the positive and negative poles are connected to the excitation current according to the factory requirements, and phase A, B and C in the stator lead line of the generator and the motor are checked to the power grid end in order, and the place where the phase sequence is changed is found. If the phase color of the power grid is correct, the probability of successful nuclear phase is large. For motor nuclear phase, power test, see the direction of rotation can determine the phase sequence.
The wireless high voltage nuclear phase meter is the phase check and phase sequence check of the power line and substation of the power system, which has the functions of nuclear phase, phase sequence test and electricity check. The wireless high voltage nuclear phase meter has strong anti-interference, meets the requirements of EMC standards, and ADAPTS to various electromagnetic field interference occasions. The phase signal of measured high voltage is taken out by the collector and directly emitted after processing. Received by nuclear phase analyzer and phase comparison, qualitative results after nuclear phase.
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