Switchgear Cabinet Overload Rerouting via Sensor-Controller Segmentation
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Solution Overview
Problem
Existing switch cabinet arrangements fail to effectively manage overloads and unbalanced loads, leading to potential system failures and unnecessary shutdowns, as they do not automatically reroute power to alternative paths when threshold values are exceeded.
Innovation Solution
Incorporating sensors to monitor current and temperature on electrical conductors within the switch cabinet, with a controller that switches the power path from a primary circuit breaker to a secondary one when thresholds are met, ensuring continuous operation by redirecting energy through an alternative path without interrupting the power supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If circuit breakers are used for overload protection, then system safety is improved, but system availability deteriorates due to unnecessary shutdowns during unbalanced loads
Solution Approach 1:
The invention segments the single protection function into two distinct functions: a controller that monitors and evaluates load conditions (including unbalanced loads) and circuit breakers that execute shutdown only for genuine overloads. This segmentation allows the system to distinguish between hazardous overloads and benign unbalanced loads, preventing unnecessary shutdowns while maintaining safety.
Solution Approach 2:
The controller acts as an intermediary between the load and the circuit breaker. Instead of the circuit breaker directly responding to all abnormal conditions, the controller intermediates by evaluating the nature of the abnormality and selectively triggering the circuit breaker only when necessary, thereby avoiding unnecessary shutdowns during unbalanced load conditions.
2Measurement precision
If circuit breakers are set to trip at low threshold values, then protection sensitivity is improved, but system stability deteriorates due to frequent shutdowns during normal unbalanced operation
Solution Approach 1:
The invention applies different response characteristics to different types of abnormal conditions. The controller evaluates whether an abnormal condition represents a genuine overload hazard or a benign unbalanced load condition, and applies appropriate responses: high sensitivity tripping for genuine overloads and tolerance for unbalanced loads. This local differentiation of response quality resolves the contradiction between sensitivity and stability.
Solution Approach 2:
The controller changes the effective threshold parameter dynamically based on the type of abnormality detected. For unbalanced loads, the system effectively raises the trip threshold to tolerate normal operational variations, while for genuine overloads, the threshold remains low for sensitive detection. This parameter adaptation resolves the contradiction between sensitivity and stability.
3Stability of the object's composition
If circuit breakers are set to high threshold values, then system stability is improved by reducing false shutdowns, but protection capability deteriorates due to insufficient sensitivity during genuine overloads
Solution Approach 1:
The system dynamically adjusts its response characteristics based on real-time evaluation of the abnormal condition. The controller continuously monitors load parameters and adaptively determines the appropriate response threshold, transitioning between tolerant and sensitive modes as needed. This dynamic adaptation allows the system to maintain both stability during normal unbalanced operation and sensitivity during genuine overloads.
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
This solution prevents circuit breaker overload, maintains normal operation during imbalances, and allows for emergency shutdown only when necessary, ensuring the system operates within safe parameters and minimizing disruptions.
Implementation Method 1
at least one sensor which is arranged on one of the electrical conductors and is set up to record a measured value for a current flowing through the conductor
Implementation Method 2
a measured value for a temperature of the conductor
Data Source
Figure 1~2
Figure 3~4
Figure 5
AI summary
Disclosed is a switchgear cabinet arrangement (1a..1f) comprising an input (E) for connecting to an energy supply network and at least one output (A). The switchgear cabinet arrangement (1a..1f) also has multiple electrical conductors (2, L1..L3, N) and multiple circuit-breakers (3a..3f) arranged along the run of the conductors, by means of which circuit-breakers the input (E) can be electrically connected to the at least one output (A) via a first path. The switchgear cabinet arrangement is also provided with at least one sensor (4a..4c) which is arranged on one of the electrical conductors (2, L1..L3, N) and is designed to detect a measured value for a current flowing through the conductor (2, L1..L3, N) and/or a measured value for a temperature of the conductor (2, L1..L3, N). The at least one output (A) is connected inside the switchgear cabinet by the actuation of the circuit breaker (3a..3f) to the input via a second path that differs from the first path, if the detected current exceeds a first threshold value and/or the detected temperature exceeds a second threshold value. Also disclosed is a circuit breaker (3a..3f) comprising an integrated sensor (4a..4c).