Modular Drive Unit for High Voltage Switchgear Maintenance
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Solution Overview
Problem
Existing medium or high-voltage switchgear systems, particularly gas-insulated switchgear, face challenges in accessibility and ease of maintenance for drive units, requiring technicians to physically access and replace faulty drive units, which is cumbersome and time-consuming, especially in large substation setups.
Innovation Solution
A drive unit design that allows for remote placement from the switchgear, featuring an electric motor, mechanical or hydraulic power transmission, and a mechanical coupling with guide elements for easy insertion and removal, enabling quick replacement and improved accessibility, along with a user-friendly interface for power supply and control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the drive unit is integrated into the switch housing, then the switch structure is compact, but the drive unit becomes difficult to access for maintenance and replacement
Solution Approach 1:
The drive unit is separated from the switch housing into an independent modular component. The switch system is divided into distinct functional modules (switch mechanism and drive unit) that can be independently accessed, maintained, and replaced, resolving the contradiction between compact integration and maintenance accessibility.
Solution Approach 2:
A coupling mechanism serves as an intermediary between the drive unit and the switch mechanism. This coupling allows the drive unit to be remotely positioned yet still effectively operate the switch, enabling both compact overall structure and independent access to the drive unit for maintenance.
2Ease of operation
If the drive unit is placed remotely from the switch, then accessibility for maintenance is improved, but the mechanical coupling becomes more complex
Solution Approach 1:
The mechanical coupling is segmented into standardized interface components with defined connection points. By dividing the coupling mechanism into modular elements with clear interfaces, the system achieves remote positioning capability while keeping the coupling design manageable and replaceable as a standard component.
3Stability of the object's composition
If the drive unit requires disassembly of the switch housing for replacement, then structural integrity is maintained, but replacement time and effort increase significantly
Solution Approach 1:
The drive unit is pre-configured with standardized coupling interfaces that align with corresponding receptacles in the switch housing. This preliminary design of matching interfaces enables quick connection and disconnection without requiring disassembly of the housing structure, significantly reducing replacement time while maintaining structural integrity.
Solution Approach 2:
The drive unit is extracted as a separate replaceable module from the switch housing. This extraction allows the drive unit to be removed and replaced independently through the coupling interface without affecting or requiring disassembly of the main switch housing structure, thus preserving structural integrity while enabling rapid replacement.
4Adaptability or versatility
If multiple switches are arranged at different positions in the substation, then functional requirements are met, but the drive units become difficult to access and monitor
Solution Approach 1:
Each switch is equipped with its own independent drive unit module, allowing switches to be positioned flexibly throughout the substation to meet functional requirements. The modular drive units can be independently accessed, monitored, and maintained at their respective locations, eliminating the accessibility problems that would arise from centralized drive mechanisms.
Solution Approach 2:
The drive unit is designed as a universal standardized module that can be applied to multiple switches positioned at different locations. This universality allows the same drive unit design to serve various switch positions while maintaining consistent accessibility and monitoring capabilities across all installations.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Facilitates faster and more convenient maintenance by allowing the drive unit to be replaced without leaving the service aisle, reducing effort and time, and enhancing the versatility of switchgear design with flexible installation options.
Implementation Method 1
The drive unit has an electric motor
Implementation Method 2
The switch drive has a mechanical coupling for delivering a drive force that can be generated via the electric motor to a switch
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A drive unit (10) which can be connected to at least one switch (4) for moving at least one switching element (5) of the at least one switch (4) from a first position to a second position, wherein the drive unit (10) comprises an electric motor (22) and an electrical interface (23) for power supply and control of the electric motor (22). The drive unit (10) further comprises a first guide element (17) and a switch drive (15), which in turn comprises the electric motor (22) and the electrical interface (23) as well as a second guide element (18). The switch drive (15) interacts with the first guide element (17) via the second guide element (18) such that the switch drive (15) can be inserted into and removed from the drive unit (10).The switch drive (15) also includes a mechanical coupling (27) for transmitting a drive force generated via the electric motor (22) to a switch (4) that can be arranged spatially remote from the drive unit (10).