Residual Current Device - Fault Notifications with Shelly
Overview
This article showcases how a notification system can be developed and which alerts whenever a Residual Current Device (RCD) trips and disrupts the power supply.
Goal
The goal is to set up a system where you receive a notification whenever the Residual Current Device (RCD) trips and cuts off power. This can help you take timely action, either by resetting the switch or by addressing any issues that caused the trip.
Challenges
Problems and challenges:
Monitoring the state of the Residual Current Device (RCD) is typically manual and can result in delayed action when it trips.
Prolonged power outages or potential safety hazards may occur due to the lack of real-time awareness of RCD trips.
Existing setups often lack automation and notification systems to inform users promptly of electrical faults.
Solutions/Implementations
Solution
The proposed solution involves including a Shelly device in the electrical circuit to monitor the state of the Residual Current Device (RCD) and to send real-time notifications when it trips. This setup ensures timely awareness of electrical faults, enhancing safety and reliability.
Key features
Real-Time Monitoring: Continuous monitoring of the RCD state.
Push Notifications: Alerts sent directly to the user’s phone whenever the RCD trips.
Configurable Scenes: Customizable triggers and actions through the Shelly app.
Enhanced Safety: Immediate response to potential faults or power outages.
Products Used
Shelly i4 Gen3
For this specific case it was used Shelly i4 Gen3. However keep in mind that any other shelly device with physical input will do the job.
Examples - Shelly 1PM Gen3, Shelly 2PM Gen3, Shelly 1 Mini Gen3, Shelly 1PM Mini Gen3. As many RCDs you would like to use, the more physical inputs are needed so for example with Shelly Pro 4PM you can control 4 at a time.
In addition - if you would like to use the fault notification to signal to another system or component, Shelly 1 Gen3 with its dry contact can be used.
Here is an exemplary diagram scheme of the wiring
Results
Real-time notifications ensure immediate awareness of RCD trips.
Improved response time to electrical faults, reducing the risk of prolonged power outages or safety hazards.
Increased convenience and safety, especially in areas prone to load shedding.
Conclusion
This system offers an efficient and easy solution, which can monitor and respond to RCD trips. By leveraging the Shelly device and app, users gain real-time insights into their electrical systems, ensuring enhanced safety and timely action in the event of power disruptions. This setup is particularly beneficial in scenarios where rapid response to electrical issues is critical.
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