Contact signal sampling device and changeover switch

By fixing the sampling circuit board to the housing of the contact system in the changeover switchgear and routing the wiring inside the housing, the problem of complex wiring in the prior art is solved, and the installation is simplified and the operation is reduced.

CN224288072UActive Publication Date: 2026-05-26ZHEJIANG CHINT ELECTRIC CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
ZHEJIANG CHINT ELECTRIC CO LTD
Filing Date
2025-05-13
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

In existing changeover switches, the contact system and signal sampling structure are installed on both sides of the operating mechanism, resulting in long wiring and complex and difficult installation and disassembly operations.

Method used

The sampling circuit board of the signal sampling structure is fixed on the housing of the contact system, and the stationary contact is electrically connected to the sampling circuit board through the sampling line. The sampling line is routed inside the housing, which shortens the routing length and simplifies the installation process.

Benefits of technology

It effectively shortens the routing length of the sampling line, reduces the difficulty and complexity of installation and disassembly, simplifies the structure, and improves the convenience and reliability of installation.

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Abstract

This utility model belongs to the field of low-voltage electrical appliance technology and discloses a contact signal sampling device and a changeover switch. The contact signal sampling device includes a contact system and a signal sampling structure. The contact system includes a housing and contact units located inside the housing. The contact units include a first stationary contact and a second stationary contact, which are used to connect to power supply I and power supply II, respectively. The signal sampling structure includes a sampling circuit board and sampling lines. By connecting sampling lines to both the first and second stationary contacts and passing the sampling lines through the housing and electrically connecting them to the sampling circuit board, the status information of power supply I or power supply II can be collected through different sampling lines. By placing the sampling circuit board on the side of the contact system closer to the operating mechanism and fixing it to the housing, the sampling lines do not need to run from the contact system to the other side of the operating mechanism, effectively shortening the length of the sampling lines and helping to reduce the difficulty and complexity of installation and disassembly.
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