In recent years, with the improvement of power supply quality requirements, our company often entrusted by customers, check the double power phase sequence in order to ensure power quality. Check the power phase sequence is also called nuclear two-phase refers to the use instrument in electric power system operation or other means to check whether the two power supply or the loop phase, phase sequence, same phase sequence to ensure that the transmission line in accordance with user requirements by three-phase load phase sequence.

In previous power nuclear two-phase experiment, first by two nuclear phase with the operator of the insulated insulated gloves and shoes, the contact with insulating rod box open sliding door, can only be carried out by two other homework personnel nuclear operations, this is the most basic, the most traditional, is also our company has been used in nuclear phase method, this kind of operation is not only time-consuming, laborious, also due to the limited operating personnel's stamina, balance, juggle, appear easily safety accident, people and equipment safety crisis. The traditional methods need at least 4 people can complete nuclear work (as shown in figure 1); In view of the above shortcomings, we substation team under the guidance of DouYuPing manager on the basis of the circuit breaker chassis chassis developed nuclear phase (figure 2), automotive chassis dedicated workers need to nuclear phase put hand into the working position, contact box automatic sliding door open (as shown in figure 3) can be nuclear test (as shown in figure 4). With nuclear phase chassis can greatly reduce threat the safety of the workers charged parts, save the time and the number of people, improve the work efficiency, increase the safety and reliability of operation test.