Remote Automatic Racking for Network Protectors
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Solution Overview
Problem
Network protectors require manual operation, exposing workers to arc flash hazards and necessitating bulky personal protective equipment, which is uncomfortable and dissuades proper use.
Innovation Solution
A remote automatic racking system for network protectors, utilizing a motor-driven gear box assembly with magnets and a magneto-resistive sensor to control the racking mechanism, allowing for safe operation from a distance and eliminating the need for manual handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If manual operation of network protectors is used, then workers can directly control the racking mechanism, but workers are exposed to arc flash hazards and must wear bulky PPE
Solution Approach 1:
The patent replaces the manual mechanical operation system with an automated motor-driven racking mechanism. The motor assembly, controlled by a controller that receives commands from a remote interface, eliminates the need for workers to physically manipulate the network protector or crank the racking mechanism, thereby substituting mechanical human operation with an automated electromechanical system.
Solution Approach 2:
The patent introduces a remote interface and control system as an intermediary between the operator and the network protector. This intermediary allows the operator to issue commands from a safe distance, and the controller translates these commands into automated motor-driven racking operations, mediating the interaction to eliminate direct exposure to hazardous areas.
2Device complexity
If manual handling of network protectors is required, then simple mechanical mechanisms can be used, but worker safety is compromised and operational comfort is reduced
Solution Approach 1:
The patent replaces the simple manual mechanical racking mechanism with an automated electromechanical system comprising a motor assembly, drive train, and controller. This substitution maintains the mechanical racking function while adding automation to eliminate worker exposure to arc flash hazards, thereby improving reliability in terms of worker safety without compromising the core mechanical functionality.
3Object-affected harmful factors
If remote automatic racking is implemented, then worker safety is improved by preventing exposure to energized bus work, but the system complexity increases
Solution Approach 1:
The patent introduces a remote interface and control system as an intermediary between the operator and the network protector. This intermediary allows the operator to issue commands from a safe distance, and the controller translates these commands into automated motor-driven racking operations, mediating the interaction to eliminate direct exposure to hazardous areas.
Solution Approach 2:
The patent replaces the manual mechanical operation system with an automated motor-driven racking mechanism. The motor assembly, controlled by a controller that receives commands from a remote interface, eliminates the need for workers to physically manipulate the network protector or crank the racking mechanism, thereby substituting mechanical human operation with an automated electromechanical system.
4Reliability
If precise monitoring and protection of breakers is maintained during remote operation, then breaker safety is ensured, but control mechanism complexity increases
Solution Approach 1:
The patent incorporates feedback mechanisms through the controller that monitors the racking mechanism's position and status. The controller receives feedback from sensors and position indicators to verify the network protector has reached the correct position (connected, disconnected, or test position), ensuring precise monitoring and protection while maintaining automated control.
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
Enhances worker safety by preventing exposure to energized bus work and maintaining precise monitoring and protection of breakers, reducing the risk of injury and improving operational comfort.
Implementation Method 1
A remote automatic racking system for network protectors, utilizing a motor-driven gear box assembly with magnets and a magneto-resistive sensor to control the racking mechanism
Data Source
AI summary
A system includes an electrical enclosure having an inner volume and a door structured to open to expose the inner volume and structured to close to enclose the inner volume. A racking mechanism is disposed in the inner volume and includes a member movable in a first direction to a first position and an opposite second direction to a different second position. A network protector is carried by the racking mechanism and is movable thereby between a connect position in the inner volume corresponding to the first position of the member of the racking mechanism, and a test position in the inner volume corresponding to the different second position of the member of the racking mechanism. A control mechanism is structured to move the member of the racking mechanism between the first position and the different second position of the member responsive to a number of remote commands.