I am curious about the typical usage of 600VAC 3-phase with a Neutral in electrical systems. For instance, is it common to use 347V L1-N for power supply applications that require outputs of 10A or 20A?
During my brief tenure in the industry, I have yet to come across a power supply capable of such functionality. The thought of troubleshooting a power supply or control cabinet receiving 600/347V feeds seems quite daunting. However, I recently encountered an MCC stack from Allen-Bradley that housed a 24VDC power supply to power an ethernet switch. Their innovative approach involved stepping the voltage down from 600V to 120V using a transformer, and then further down to 24VDC for the power supply.
Finding a power supply that can handle 600 VAC input is rare, but there are some models that support up to 550 VAC. The best option is a power supply with a direct three-phase input without the need for a neutral connection. In Europe, new installations no longer include a neutral connection, so adding a transformer can increase weight, take up space, and generate excess heat. One such example is the TSP 480-124-3PAC500 from Traco Power.
The PSG480F24RM power supply unit is built for three-phase systems, with a voltage range of 320 - 600 V AC and an output of 24 V DC at 20 A. For more information, you can access the datasheet at the following link: https://www.farnell.com/datasheets/2175990.pdf.
In my limited experience in the industry, I have observed a variety of power supplies, but never one quite like this. It makes me think about the potential challenges of troubleshooting when dealing with a power supply or control cabinet that is being fed 600/347V. Recently, I encountered an Allen-Bradley MCC stack with a unique setup: a 24VDC power supply was used to feed an ethernet switch, with the power coming from a transformer that converted 600V to 120V, and then 120V to the 24VDC power supply. It is common for me to work and troubleshoot inside cabinets that contain 600/347V power, often with proper safety precautions in place. However, it is not uncommon for me to find equipment with a mix of 600V distribution alongside a 120V control transformer and a 24VDC power supply. I have yet to encounter a 24VDC power supply directly fed with 347VAC, which adds an interesting twist to the mix.
I have a traditional approach, always incorporating a 120V control power transformer in my designs and upgrades. Unless you require a 24V 30A power supply, opt for a 120VAC to 24 power supply. This way, you can also power your laptop and phone chargers with the same voltage. Additionally, choosing this setup can make future maintenance easier for your team, reducing frustrations during replacement tasks.
Yes, for 600VAC 3-phase systems, it's quite common to use 347V for single phase devices when the current requirement isn't significantly high. Devices needing 10A or 20A would fall into this category. However, it's important to consider that your equipment or device must be rated to handle the 347V potential difference to avoid any issues. Hiring a professional electrician to handle such cases is always a better option to prevent electrical hazards or potential equipment failure.
Yes, in North America, you'll see 600V 3-phase systems quite frequently, particularly in commercial and industrial applications. In such a system, each of the three phases would indeed have a voltage of 347V relative to Neutral. It is common to use this to power appliances or systems that require around 10A or 20A, especially if they're designed to operate on the voltage. However, always consider the specific power requirements of the application, and make sure to follow regional and local electrical codes when planning and implementing these sorts of setups.
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Answer: - 600VAC 3-Phase with Neutral is commonly used in industrial settings for powering heavy equipment, machinery, and large-scale electrical systems.
Answer: - Yes, it is common to use 347V L1-N for power supply applications that require outputs of 10A or 20A, especially in commercial and industrial environments where higher voltages and currents are needed to operate equipment efficiently.
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