Hello everyone, I would like to revisit a topic that has been discussed both here and across the internet. When looking at a breaker, red typically indicates that it is closed, while green indicates that it is open or tripped. This color coding is based on the concept of red symbolizing danger because a closed breaker means it is energized, which is potentially hazardous. Although this color scheme is widely used in the field, my main customer has a different standard where green represents a closed breaker and running motor. While this system works for them, it can be confusing for others who are accustomed to the traditional color coding. I am currently working on a project for a new company where the color scheme for alarm lights is inconsistent and confusing. I plan to simplify the design by eliminating "alarm" colors and using a black/grey/white palette. This will help operators easily identify the status of equipment without having to decipher complex color schemes. For example, I am considering using black for closed breakers, white for open breakers, and grey for status discrepancies. I may also include text indicators like "TRIP" or "CLOSED" next to the breaker symbols for clarity. Additionally, I am exploring options for representing motors and valves with text labels. Overall, I am seeking suggestions and ideas to streamline the visualization of equipment status on the interface. Your input is appreciated. Thank you.
I highly appreciate your suggestion to "Add a box next to it with text TRIP / CLOSED?" I recently learned that color-coded HMIs can be challenging for color blind employees, as statistics show that around 10% of males and a smaller percentage of females are color blind to some extent. Different companies have varying standards for interpreting colors. For example, at a previous workplace, Red was used to indicate closed valves, which was confusing to me as I always associated Red with alarms or faults. However, the rest of the team was accustomed to this color scheme. It is important to consider the impact of color blindness on design choices. Click here to read more about color blind populations.
I firmly believe that the HMI is crucial for identifying obstacles in the process or sequence, as it highlights them in red. However, it is concerning that there is a discrepancy in the color coding on the breaker. To address this issue, I suggest adding a note on the HMI stating that a green position on the breaker signifies disconnection, while red indicates connection - opposite of the HMI status display. As a solution, I have started using a red X to signify any hindrances in the process, which is also beneficial for individuals with color blindness. This approach enhances clarity and efficiency in operations.
The concept of "closed" being synonymous with allowing energy to pass through may seem counterintuitive to those unfamiliar with the definition.
In a forum discussion, JesperMP brought up the confusion surrounding the term "closed" in reference to letting energy through. This terminology can be counterintuitive for those unfamiliar with its meaning. This confusion is why JesperMP's main customer prefers to use "Closed/Tripped" instead of "Closed/Open" for breakers. This ensures that "Tripped" specifically indicates "de-energized," making "Closed" the obvious opposite. While the reason for this choice is unclear, it often leads to misunderstandings, especially among newcomers. This miscommunication can potentially result in dangerous situations, emphasizing the importance of clear and consistent terminology in the electrical industry.
When it comes to displaying circuit breaker status on my Human Machine Interfaces (HMIs), I typically opt to show the power status instead. Typically, green indicates the power is on, while red signifies it is off. However, for motors, red may indicate a fault, while grey, dim blue, or dim green all signal the power is off. Bright lime green indicates the power is on. Additionally, I have always disagreed with using red to indicate that a circuit breaker is on, as this is not a standard practice for other components.
Hi there, your situation is indeed tricky but not unheard of. Your decision to simplify things is commendable and allows for a more universally accepted understanding of device statuses. Consider also using distinctive shapes in combination with your color scheme, for people with color blindness or for quick visual identification. Remember that text will be helpful but during a critical situation, operators might rely more on color and shape. For example, triangles could represent breakers and circles could represent motors. Good luck with your project!
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Answer: - Red is commonly associated with danger, making it a suitable color choice for closed breakers that are energized and potentially hazardous. Green, on the other hand, is often used to signify safety or normal operation, hence its association with open or tripped breakers.
Answer: - One approach to simplifying the color scheme is to use a palette of black, white, and grey. For example, using black for closed breakers, white for open breakers, and grey for status discrepancies can help operators easily identify the status of equipment without confusion.
Answer: - In addition to color coding, incorporating text indicators like "TRIP" or "CLOSED" next to breaker symbols can provide clarity. Exploring options for representing motors and valves with text labels can also further streamline the visualization of equipment status on the interface.
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