Post History
The question: Is there a way to convert from triple-phase 208VAC to single-phase 208VAC? Background: Hi everyone, I am stuck on a project I'm working on. I'd like to convert 208VAC (three phase,...
Question
transformer
#5: Post edited
by
cosined
·
2021-12-04T04:29:51Z (almost 3 years ago)
- # **The question:**
- Is there a way to convert from triple-phase 208VAC to single-phase 208VAC?
- # **Background:**
- Hi everyone, I am stuck on a project I'm working on. I'd like to **convert 208VAC** (**three phase**, NEMA L5-20R) to **230VAC** (**single phase**, NEMA 5-20R) for use with a piece of **230VAC equipment** that plugs into the 5-20R.
- The wall outlet I am limited to using is the **aforementioned 208VAC outlet in wye arrangement**. Only **two of the three 120V hots are accessible**, as well as the **grounded neutral**. 208V is taken by the difference between the two phase-shifted 120V hots. See the diagram below:
- 
- The goal is to get a **single phase** voltage much like how you get 120VAC single phase at a typical NEMA 5-15R outlet you see in a North American residence/business. But instead of 120V, it needs to be 230VAC for the equipment I want to attach. So like this:
- 
- Not being too experienced in this field, I got a [single-phase T-1-81051 autotransformer from Grainger](https://www.grainger.com/product/ACME-ELECTRIC-500-VA-Buck-Boost-Transformer-4LEF9) but realized too late that I couldn't take the two three-phase hots from the wall and use it as a pseudo single-phase. I recognized this after looking more at the wiring diagram for it (Fig. H) and realizing that I would be shorting the connections if I made the attachments as shown.
- 
- 
- Everything else matches what I need for the equipment load, but the input not being single-phase is a problem. My question is if there's a way to convert triple-phase to single-phase, maintaining a neutral/ground connection. I want to convert the power from the wall **from 208V triple-phase to 208V single-phase before feeding that single-phase into the transformer** I got.
- I searched a bit and learned about **phase converters**, but it seemed like **they only go the opposite way around, converting from single-phase to triple-phase only**.
Any help is appreciated! I know others have much more experience and might be aware of other options out there. I'd be happy to answer any questions! Thanks in advance.
- # **The question:**
- Is there a way to convert from triple-phase 208VAC to single-phase 208VAC?
- # **Background:**
- Hi everyone, I am stuck on a project I'm working on. I'd like to **convert 208VAC** (**three phase**, NEMA L5-20R) to **230VAC** (**single phase**, NEMA 5-20R) for use with a piece of **230VAC equipment** that plugs into the 5-20R.
- The wall outlet I am limited to using is the **aforementioned 208VAC outlet in wye arrangement**. Only **two of the three 120V hots are accessible**, as well as the **grounded neutral**. 208V is taken by the difference between the two phase-shifted 120V hots. See the diagram below:
- 
- The goal is to get a **single phase** voltage much like how you get 120VAC single phase at a typical NEMA 5-15R outlet you see in a North American residence/business. But instead of 120V, it needs to be 230VAC for the equipment I want to attach. So like this:
- 
- Not being too experienced in this field, I got a [single-phase T-1-81051 autotransformer from Grainger](https://www.grainger.com/product/ACME-ELECTRIC-500-VA-Buck-Boost-Transformer-4LEF9) but realized too late that I couldn't take the two three-phase hots from the wall and use it as a pseudo single-phase. I recognized this after looking more at the wiring diagram for it (Fig. H) and realizing that I would be shorting the connections if I made the attachments as shown.
- 
- 
- Everything else matches what I need for the equipment load, but the input not being single-phase is a problem. My question is if there's a way to convert triple-phase to single-phase, maintaining a neutral/ground connection. I want to convert the power from the wall **from 208V triple-phase to 208V single-phase before feeding that single-phase into the transformer** I got.
- I searched a bit and learned about **phase converters**, but it seemed like **they only go the opposite way around, converting from single-phase to triple-phase only**.
- Any help is appreciated! I know others have much more experience and might be aware of other options out there. I'd be happy to answer any questions! Thanks in advance.
- -----
- _Edit:_
- This shows the voltages I measured using a digital multimeter at the NEMA L5-20 outlet. The voltages agree with a standard three-phase system:
- 
#4: Post edited
by
Olin Lathrop
·
2021-12-03T17:00:01Z (almost 3 years ago)
Removed inappropriate tags
#3: Post edited
by
cosined
·
2021-12-03T07:32:34Z (almost 3 years ago)
- # **The question:**
- Is there a way to convert from triple-phase 208VAC to single-phase 208VAC?
- # **Background:**
- Hi everyone, I am stuck on a project I'm working on. I'd like to **convert 208VAC** (**three phase**, NEMA L5-20R) to **230VAC** (**single phase**, NEMA 5-20R) for use with a piece of **230VAC equipment** that plugs into the 5-20R.
- The wall outlet I am limited to using is the **aforementioned 208VAC outlet in wye arrangement**. Only **two of the three 120V hots are accessible**, as well as the **grounded neutral**. 208V is taken by the difference between the two phase-shifted 120V hots. See the diagram below:
- 
- The goal is to get a **single phase** voltage much like how you get 120VAC single phase at a typical NEMA 5-15R outlet you see in a North American residence/business. But instead of 120V, it needs to be 230VAC for the equipment I want to attach. So like this:
- 
- Not being too experienced in this field, I got a [single-phase T-1-81051 autotransformer from Grainger](https://www.grainger.com/product/ACME-ELECTRIC-500-VA-Buck-Boost-Transformer-4LEF9) but realized too late that I couldn't take the two three-phase hots from the wall and use it as a pseudo single-phase. I recognized this after looking more at the wiring diagram for it (Fig. H) and realizing that I would be shorting the connections if I made the attachments as shown.
- 
- 
Everything else matches what I need for the equipment load, but the input not being single-phase is a problem. **My question is if there's a way to convert triple-phase to single-phase, maintaining a neutral/ground connection.** I want to convert the power from the wall **from 208V triple-phase to 208V single-phase before feeding that single-phase into the transformer** I got.I searched a bit and learned about phase converters, but it seemed like they only go the opposite way around, converting from single-phase to triple-phase only.- Any help is appreciated! I know others have much more experience and might be aware of other options out there. I'd be happy to answer any questions! Thanks in advance.
- # **The question:**
- Is there a way to convert from triple-phase 208VAC to single-phase 208VAC?
- # **Background:**
- Hi everyone, I am stuck on a project I'm working on. I'd like to **convert 208VAC** (**three phase**, NEMA L5-20R) to **230VAC** (**single phase**, NEMA 5-20R) for use with a piece of **230VAC equipment** that plugs into the 5-20R.
- The wall outlet I am limited to using is the **aforementioned 208VAC outlet in wye arrangement**. Only **two of the three 120V hots are accessible**, as well as the **grounded neutral**. 208V is taken by the difference between the two phase-shifted 120V hots. See the diagram below:
- 
- The goal is to get a **single phase** voltage much like how you get 120VAC single phase at a typical NEMA 5-15R outlet you see in a North American residence/business. But instead of 120V, it needs to be 230VAC for the equipment I want to attach. So like this:
- 
- Not being too experienced in this field, I got a [single-phase T-1-81051 autotransformer from Grainger](https://www.grainger.com/product/ACME-ELECTRIC-500-VA-Buck-Boost-Transformer-4LEF9) but realized too late that I couldn't take the two three-phase hots from the wall and use it as a pseudo single-phase. I recognized this after looking more at the wiring diagram for it (Fig. H) and realizing that I would be shorting the connections if I made the attachments as shown.
- 
- 
- Everything else matches what I need for the equipment load, but the input not being single-phase is a problem. My question is if there's a way to convert triple-phase to single-phase, maintaining a neutral/ground connection. I want to convert the power from the wall **from 208V triple-phase to 208V single-phase before feeding that single-phase into the transformer** I got.
- I searched a bit and learned about **phase converters**, but it seemed like **they only go the opposite way around, converting from single-phase to triple-phase only**.
- Any help is appreciated! I know others have much more experience and might be aware of other options out there. I'd be happy to answer any questions! Thanks in advance.
#2: Post edited
by
cosined
·
2021-12-03T07:30:57Z (almost 3 years ago)
- # **The question:**
- Is there a way to convert from triple-phase 208VAC to single-phase 208VAC?
- # **Background:**
- Hi everyone, I am stuck on a project I'm working on. I'd like to **convert 208VAC** (**three phase**, NEMA L5-20R) to **230VAC** (**single phase**, NEMA 5-20R) for use with a piece of **230VAC equipment** that plugs into the 5-20R.
- The wall outlet I am limited to using is the **aforementioned 208VAC outlet in wye arrangement**. Only **two of the three 120V hots are accessible**, as well as the **grounded neutral**. 208V is taken by the difference between the two phase-shifted 120V hots. See the diagram below:
- 
- The goal is to get a **single phase** voltage much like how you get 120VAC single phase at a typical NEMA 5-15R outlet you see in a North American residence/business. But instead of 120V, it needs to be 230VAC for the equipment I want to attach. So like this:
- 
- Not being too experienced in this field, I got a [single-phase T-1-81051 autotransformer from Grainger](https://www.grainger.com/product/ACME-ELECTRIC-500-VA-Buck-Boost-Transformer-4LEF9) but realized too late that I couldn't take the two three-phase hots from the wall and use it as a pseudo single-phase. I recognized this after looking more at the wiring diagram for it (Fig. H) and realizing that I would be shorting the connections if I made the attachments as shown.
- 
- 
- Everything else matches what I need for the equipment load, but the input not being single-phase is a problem. **My question is if there's a way to convert triple-phase to single-phase, maintaining a neutral/ground connection.** I want to convert the power from the wall **from 208V triple-phase to 208V single-phase before feeding that single-phase into the transformer** I got.
- I searched a bit and learned about phase converters, but it seemed like they only go the opposite way around, converting from single-phase to triple-phase only.
- Any help is appreciated! I know others have much more experience and might be aware of other options out there. I'd be happy to answer any questions! Thanks in advance.
- # **The question:**
- Is there a way to convert from triple-phase 208VAC to single-phase 208VAC?
- # **Background:**
- Hi everyone, I am stuck on a project I'm working on. I'd like to **convert 208VAC** (**three phase**, NEMA L5-20R) to **230VAC** (**single phase**, NEMA 5-20R) for use with a piece of **230VAC equipment** that plugs into the 5-20R.
- The wall outlet I am limited to using is the **aforementioned 208VAC outlet in wye arrangement**. Only **two of the three 120V hots are accessible**, as well as the **grounded neutral**. 208V is taken by the difference between the two phase-shifted 120V hots. See the diagram below:
- 
- The goal is to get a **single phase** voltage much like how you get 120VAC single phase at a typical NEMA 5-15R outlet you see in a North American residence/business. But instead of 120V, it needs to be 230VAC for the equipment I want to attach. So like this:
- 
- Not being too experienced in this field, I got a [single-phase T-1-81051 autotransformer from Grainger](https://www.grainger.com/product/ACME-ELECTRIC-500-VA-Buck-Boost-Transformer-4LEF9) but realized too late that I couldn't take the two three-phase hots from the wall and use it as a pseudo single-phase. I recognized this after looking more at the wiring diagram for it (Fig. H) and realizing that I would be shorting the connections if I made the attachments as shown.
- 
- 
- Everything else matches what I need for the equipment load, but the input not being single-phase is a problem. **My question is if there's a way to convert triple-phase to single-phase, maintaining a neutral/ground connection.** I want to convert the power from the wall **from 208V triple-phase to 208V single-phase before feeding that single-phase into the transformer** I got.
- I searched a bit and learned about phase converters, but it seemed like they only go the opposite way around, converting from single-phase to triple-phase only.
- Any help is appreciated! I know others have much more experience and might be aware of other options out there. I'd be happy to answer any questions! Thanks in advance.
#1: Initial revision
by
cosined
·
2021-12-03T07:30:08Z (almost 3 years ago)
208VAC triple-phase to single-phase conversion
# **The question:** Is there a way to convert from triple-phase 208VAC to single-phase 208VAC? # **Background:** Hi everyone, I am stuck on a project I'm working on. I'd like to **convert 208VAC** (**three phase**, NEMA L5-20R) to **230VAC** (**single phase**, NEMA 5-20R) for use with a piece of **230VAC equipment** that plugs into the 5-20R. The wall outlet I am limited to using is the **aforementioned 208VAC outlet in wye arrangement**. Only **two of the three 120V hots are accessible**, as well as the **grounded neutral**. 208V is taken by the difference between the two phase-shifted 120V hots. See the diagram below:  The goal is to get a **single phase** voltage much like how you get 120VAC single phase at a typical NEMA 5-15R outlet you see in a North American residence/business. But instead of 120V, it needs to be 230VAC for the equipment I want to attach. So like this:  Not being too experienced in this field, I got a [single-phase T-1-81051 autotransformer from Grainger](https://www.grainger.com/product/ACME-ELECTRIC-500-VA-Buck-Boost-Transformer-4LEF9) but realized too late that I couldn't take the two three-phase hots from the wall and use it as a pseudo single-phase. I recognized this after looking more at the wiring diagram for it (Fig. H) and realizing that I would be shorting the connections if I made the attachments as shown.   Everything else matches what I need for the equipment load, but the input not being single-phase is a problem. **My question is if there's a way to convert triple-phase to single-phase, maintaining a neutral/ground connection.** I want to convert the power from the wall **from 208V triple-phase to 208V single-phase before feeding that single-phase into the transformer** I got. I searched a bit and learned about phase converters, but it seemed like they only go the opposite way around, converting from single-phase to triple-phase only. Any help is appreciated! I know others have much more experience and might be aware of other options out there. I'd be happy to answer any questions! Thanks in advance.