What Happens if 2K2 & 2K3 Close Simultaneously?

In summary, the conversation discusses the potential consequences of two specific motor terminals, 2K2 and 2K3, closing simultaneously. There are interlocks in place to prevent this from happening, but the individual is curious about what would happen if they did close at the same time. The theorized outcome would be a decrease in voltage and an increase in current at the motor, as well as a circulating current in the auto-xmfr. The conversation also mentions the possibility of a loud bang due to relay contacts vaporizing, emphasizing the importance of safety precautions such as fuses and a physical barrier.
  • #1
kenneth edmiston
45
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TL;DR Summary
What happens when run and shorting contactors are closed in at the same time.
Can someone give me some insight into what would happen at the motor terminals and on the line if 2K2 (run Contactor) and 2K3 (auto xfmr wye contactor) were to close simultaneously. There are interlocks to prevent this, but I would like to know out of curiosity. My theory is that you would have reduced voltage and increase current at motor due to voltage drop and load torque demand, and a circulating current in the auto-xmfr.

thanks
 

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  • #2
Potentially a big BANG as the relay contacts vaporize.
But that's why there are fuses in the supply lines.

If you try the experiment be sure to have something substantial between it and you, a concrete wall perhaps. If you must watch it, use a video camera that you are willing to replace.

Cheers,
Tom
 
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Likes berkeman

1. What is the likelihood of 2K2 and 2K3 closing simultaneously?

The likelihood of 2K2 and 2K3 closing simultaneously is very low. These are two separate years and it is highly unlikely that they would both end at the exact same time.

2. What would be the impact of 2K2 and 2K3 closing simultaneously?

The impact of 2K2 and 2K3 closing simultaneously would depend on the context in which they are closing. If they are referring to financial years, it could affect the reporting and budgeting processes of companies. If they are referring to calendar years, it would have little impact on daily life.

3. Is it possible for 2K2 and 2K3 to close simultaneously due to a global event?

It is possible for 2K2 and 2K3 to close simultaneously due to a global event, such as a natural disaster or a major political event. However, this would be a rare occurrence and would require specific circumstances.

4. How would the scientific community handle the simultaneous closing of 2K2 and 2K3?

The scientific community would likely continue their work as usual, as the closing of two years simultaneously would not have a significant impact on their research or studies. However, they may need to make adjustments to their data and reporting processes if they are affected by the simultaneous closing.

5. Could the simultaneous closing of 2K2 and 2K3 have any long-term effects?

The simultaneous closing of 2K2 and 2K3 would not have any long-term effects as it is a temporary occurrence. Any potential impact would depend on the specific circumstances and context in which the years are closing simultaneously.

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