A secondary nuclear phase method using a high voltage charged display

By using a high-voltage live display to extract low-voltage signals with a capacitive sensor and measuring the voltage difference with a multimeter, the problem of difficult phase matching in high-voltage equipment is solved. This enables safe and rapid phase determination and confirmation of phase matching results, avoiding the risk of electric shock and economic losses.

CN122238726APending Publication Date: 2026-06-19NANJING IRON & STEEL CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN Β· China
Patent Type
Applications(China)
Current Assignee / Owner
NANJING IRON & STEEL CO LTD
Filing Date
2026-03-25
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

The current phase verification operation of high-voltage medium-voltage switchgear and ring main unit is difficult, especially the ring main unit cannot be phase verified once. The accuracy and reliability of the secondary phase verification are affected by the correctness of the equipment wiring. Furthermore, incorrect phase verification may lead to serious consequences such as short circuits. In addition, the existing methods are time-consuming and labor-intensive, increasing the time and economic losses for power outage troubleshooting.

Method used

A high-voltage live indicator is used for secondary phase comparison. By installing a reference live indicator at the incoming switch position, a low-voltage signal is extracted using a capacitive sensor, and the voltage difference is measured using a multimeter to determine the phase relationship, thus avoiding direct contact with high-voltage equipment.

Benefits of technology

It enables safe and accurate phase verification operations, avoids the risk of electric shock, simplifies the phase verification process, reduces on-site workload and power outage time, and reduces economic losses.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN122238726A_ABST
    Figure CN122238726A_ABST
Patent Text Reader

Abstract

This invention discloses a method for secondary phase verification using a high-voltage live indicator, relating to the field of power equipment testing technology. The method includes the following steps: Step S1: Install a first live indicator at the incoming switch position as a reference live indicator, and verify the phase sequence of this reference live indicator after power is supplied; Step S2: Install a second live indicator at the equipment to be verified as a comparison object, and use a phase sequence detection instrument to check whether the phase sequence of the second live indicator is correct; Step S3: Use a voltage measuring device to measure the voltage difference between the corresponding phase detection holes of the first and second live indicators; Step S4: If the voltage difference is zero, determine that the corresponding phases of the two live indicators are in phase; otherwise, determine that they are out of phase. This invention eliminates the need for direct contact with high-voltage electrical equipment, keeping personnel away from high-voltage live equipment and effectively preventing the risk of electric shock.
Need to check novelty before this filing date? Find Prior Art