Lighting Circuit Overload Warning With Flashing and Cutoff

Resolve Bottlenecks,
Find Innovative Solutions
Generate Solutions

Solution Overview

Problem

Outdoor lighting fixtures with multiple lamps of different wattages connected to the same circuit often exceed the circuit's rated current without immediate warning, posing safety risks and equipment damage due to the inability to calculate appropriate lamp installations.

Innovation Solution

A real-time warning system with a current detection component and control component that periodically flashes lamps and cuts off power when current thresholds are exceeded, ensuring safe operation by preventing overloads.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple lamps with different wattages are connected to the same circuit in outdoor lighting fixtures, then the lighting coverage and flexibility are improved, but the risk of exceeding circuit rated current increases and immediate warning capability deteriorates

Engineering Contradiction:
Improvelighting configuration flexibilityVSAvoidcircuit overload safety
Core Design Contradiction:
Adaptability or versatilityVSReliability

Solution Approach 1:

The patent implements a feedback mechanism by detecting the actual current drawn by the lighting circuit and comparing it against the circuit's rated current. When the detected current exceeds the rated current, the system provides immediate feedback through visual warnings (flashing LEDs) and audible warnings (buzzer sounds), alerting users to the overload condition. This closed-loop feedback system enables real-time monitoring and immediate response to prevent circuit damage.

Inventive Principle:
Principle #23Feedback

Solution Approach 2:

The patent introduces an intermediary overload detection device that mediates between the power supply and the lighting circuit. This device includes current detection components (such as current transformers or shunt resistors) and control circuitry that act as intermediaries to monitor power consumption and enforce safety limits. The intermediary device translates electrical parameters into human-perceptible warnings without disrupting the flexible lighting configuration.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Ease of operation

If users install lamps without calculating total wattage, then the ease of installation is improved, but the accuracy of load management deteriorates and overload risks increase

Engineering Contradiction:
Improveinstallation simplicityVSAvoidload calculation accuracy
Core Design Contradiction:
Ease of operationVSMeasurement precision

Solution Approach 1:

The patent enables self-service operation by allowing users to install lamps without performing manual wattage calculations. The system automatically performs the load management function through its current detection circuitry, which continuously measures the actual power consumption and compares it against safety thresholds. The control circuitry autonomously determines when overload conditions exist and triggers appropriate warnings, eliminating the need for user calculations while maintaining precise load management.

Inventive Principle:
Principle #25Self-service

Solution Approach 2:

The patent replaces the manual mechanical calculation process with an electronic measurement and control system. Instead of requiring users to manually calculate total wattage by adding individual lamp ratings, the system uses current detection components to directly measure the actual electrical load. This substitution of electronic measurement for manual calculation provides both ease of installation and precise load management simultaneously.

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If the system provides immediate overload warnings, then the safety response time is improved, but the system complexity increases due to additional detection and control components

Engineering Contradiction:
Improveoverload protection capabilityVSAvoidcontrol system structure
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent merges multiple functions into a single integrated overload detection device. The current detection components, control circuitry, visual warning indicators (LEDs), and audible warning devices (buzzer) are combined into one unified system that can be installed at the circuit breaker or fuse location. This merging approach provides comprehensive overload protection capability while minimizing the increase in system complexity through functional integration rather than separate discrete components.

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The patent designs the overload detection device with multi-functionality to justify the added complexity. The system not only detects overloads but also provides dual-mode warnings (visual and audible), records peak current values, and can be installed in various circuit configurations. This universal design approach maximizes the safety benefits relative to the complexity investment by providing multiple protective and informative functions within a single device.

Inventive Principle:
Principle #6Universality (Multi-functionality)

Data Source

PatentUS20250358922A1Overload warning and protection device and method and lighting control system
Publication Date: 2025.11.20 SMART ELECTRIC WORKS CO LTD
  • US20250358922A1 patent drawing
  • US20250358922A1 patent drawing
  • US20250358922A1 patent drawing

AI summary

An overload warning and protection device suitable for a lighting control system including a power supply, a lighting device and a switching element is disclosed to include a current detection component and a control component. When the control component detects that the current is greater than the first threshold current and continues to exceed the first preset time, the control component periodically turns off and on the switching element, causing the lighting device to flash to remind the user. When the control component detects that the current is greater than the second threshold current, the control component permanently shuts down the switching element and cuts off the power supply for protection.