A mobile relay protection device for use during load transfer in a substation

By using mobile relay protection devices to achieve uninterrupted power supply retrofitting of primary equipment in substations, the problem of power supply interruption in traditional methods is solved. This provides an uninterrupted power supply retrofitting solution suitable for high-voltage substations, reducing load transfer costs and safety risks.

CN224355719UActive Publication Date: 2026-06-12XINING POWER SUPPLY CO OF STATE GRID QINGHAI ELECTRIC POWER CO
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
XINING POWER SUPPLY CO OF STATE GRID QINGHAI ELECTRIC POWER CO
Filing Date
2025-05-27
Publication Date
2026-06-12

AI Technical Summary

Technical Problem

Existing technologies require a power outage for substation equipment maintenance and upgrades, leading to power supply interruptions. In particular, the retrofitting of low-voltage substations cannot achieve uninterrupted power supply, and mobile substations are not applicable, resulting in high load transfer costs and safety risks.

Method used

A mobile relay protection device is provided, including a mobile relay protection box, a protector, a dedicated connecting cable and a quick-connect plug. It adopts a flexible and pressure-resistant cable and has dustproof, waterproof and moisture-proof functions. It supports the uninterrupted power supply transformation of primary equipment and is suitable for high-voltage substations.

Benefits of technology

It enables uninterrupted power supply retrofitting of primary equipment, reduces investment in load transfer, improves work efficiency, reduces power grid safety risks, and is suitable for the retrofitting and upgrading of secondary equipment in high-voltage substations.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application provides a mobile relay protection device for substation load transfer, comprising: a mobile relay protection box, the bottom of the box is provided with wheels and a locking mechanism for realizing the movement and fixation of the box; a mobile relay protection device installed in the box, the device comprises a line protection module and a main transformer protection module; a special connecting cable, one end of which is fixedly connected with the mobile relay protection device, and the other end is provided with a marked special connector, the special connector is configured as a quick connection plug for detachable connection with a terminal block of a substation interval terminal box or a terminal block of a control cabinet; wherein the special connecting cable adopts a flexible and pressure-resistant cable, and the current terminal wiring structure of the quick connection plug is designed to prevent open circuit.
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