Will a DC circuit breaker trip due to high voltage?

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Will a DC circuit breaker trip due to high voltage (exceeding voltage rating) or will it only trip because of high current? For example, if you have a 40 Amp DC circuit breaker which also has a 32 voltage rating would you have to keep the amperage below 40 and also keep the voltage below 32? Or do you only have to consider the amperage not going above 40?

The reason I ask this is because someone else on here asked if an AC circuit breaker will trip because of voltage and the answer was no. An AC circuit breaker will only trip due to high current and can't even detect voltage. I was also hoping this applies to DC circuit breakers as well. Does anyone know the answer to this?

dc

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Chris U

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Will a DC circuit breaker trip due to high voltage (exceeding voltage rating) or will it only trip because of high current? For example, if you have a 40 Amp DC circuit breaker which also has a 32 voltage rating would you have to keep the amperage below 40 and also keep the voltage below 32? Or do you only have to consider the amperage not going above 40?

The reason I ask this is because someone else on here asked if an AC circuit breaker will trip because of voltage and the answer was no. An AC circuit breaker will only trip due to high current and can't even detect voltage. I was also hoping this applies to DC circuit breakers as well. Does anyone know the answer to this?

dc

share|improve this question

asked 1 hour ago

Chris U

62

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Chris U is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

add a comment | 

up vote
1
down vote

favorite

up vote
1
down vote

favorite

Will a DC circuit breaker trip due to high voltage (exceeding voltage rating) or will it only trip because of high current? For example, if you have a 40 Amp DC circuit breaker which also has a 32 voltage rating would you have to keep the amperage below 40 and also keep the voltage below 32? Or do you only have to consider the amperage not going above 40?

The reason I ask this is because someone else on here asked if an AC circuit breaker will trip because of voltage and the answer was no. An AC circuit breaker will only trip due to high current and can't even detect voltage. I was also hoping this applies to DC circuit breakers as well. Does anyone know the answer to this?

dc

share|improve this question

asked 1 hour ago

Chris U

62

New contributor

Chris U is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

Will a DC circuit breaker trip due to high voltage (exceeding voltage rating) or will it only trip because of high current? For example, if you have a 40 Amp DC circuit breaker which also has a 32 voltage rating would you have to keep the amperage below 40 and also keep the voltage below 32? Or do you only have to consider the amperage not going above 40?

The reason I ask this is because someone else on here asked if an AC circuit breaker will trip because of voltage and the answer was no. An AC circuit breaker will only trip due to high current and can't even detect voltage. I was also hoping this applies to DC circuit breakers as well. Does anyone know the answer to this?

dc

dc

share|improve this question

asked 1 hour ago

Chris U

62

New contributor

Chris U is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share|improve this question

asked 1 hour ago

Chris U

62

New contributor

Chris U is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

share|improve this question

share|improve this question

asked 1 hour ago

Chris U

62

New contributor

Chris U is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

asked 1 hour ago

Chris U

62

asked 1 hour ago

Chris U

62

62

New contributor

Chris U is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

New contributor

Chris U is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

Chris U is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.

add a comment | 

add a comment | 

2 Answers
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You need to keep the voltage less than 32V, but not because the breaker will trip if you go higher than that.

The problem is that if the voltage is too high when the breaker trips, it might not be able to stop the current because of arcing.

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answered 1 hour ago

Dave Tweed♦

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Circuit breakers do not "know" the voltage of the circuit they are used in, so cannot trip based on that voltage - they only trip on over-current.

However, they are designed and rated to operate correctly (trip cleanly) only up to a certain voltage - using a 32 volt breaker on a 120 volt circuit may result in the breaker arcing when it trips (likewise, using a DC-rated breaker on an AC circuit, or vice versa, may result in faulty operation.)

(GFCI and AFCI breakers may be more sensitive to voltage than normal breakers)

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answered 1 hour ago

Peter Bennett

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2 Answers
2

active

oldest

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2 Answers
2

active

oldest

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active

oldest

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active

oldest

votes

up vote
4
down vote

You need to keep the voltage less than 32V, but not because the breaker will trip if you go higher than that.

The problem is that if the voltage is too high when the breaker trips, it might not be able to stop the current because of arcing.

share|improve this answer

answered 1 hour ago

Dave Tweed♦

113k9136244

add a comment | 

up vote
4
down vote

You need to keep the voltage less than 32V, but not because the breaker will trip if you go higher than that.

The problem is that if the voltage is too high when the breaker trips, it might not be able to stop the current because of arcing.

share|improve this answer

answered 1 hour ago

Dave Tweed♦

113k9136244

add a comment | 

up vote
4
down vote

up vote
4
down vote

You need to keep the voltage less than 32V, but not because the breaker will trip if you go higher than that.

The problem is that if the voltage is too high when the breaker trips, it might not be able to stop the current because of arcing.

share|improve this answer

answered 1 hour ago

Dave Tweed♦

113k9136244

You need to keep the voltage less than 32V, but not because the breaker will trip if you go higher than that.

The problem is that if the voltage is too high when the breaker trips, it might not be able to stop the current because of arcing.

share|improve this answer

answered 1 hour ago

Dave Tweed♦

113k9136244

share|improve this answer

share|improve this answer

answered 1 hour ago

Dave Tweed♦

113k9136244

answered 1 hour ago

Dave Tweed♦

113k9136244

answered 1 hour ago

Dave Tweed♦

113k9136244

113k9136244

add a comment | 

add a comment | 

up vote
3
down vote

Circuit breakers do not "know" the voltage of the circuit they are used in, so cannot trip based on that voltage - they only trip on over-current.

However, they are designed and rated to operate correctly (trip cleanly) only up to a certain voltage - using a 32 volt breaker on a 120 volt circuit may result in the breaker arcing when it trips (likewise, using a DC-rated breaker on an AC circuit, or vice versa, may result in faulty operation.)

(GFCI and AFCI breakers may be more sensitive to voltage than normal breakers)

share|improve this answer

answered 1 hour ago

Peter Bennett

35.8k12864

add a comment | 

up vote
3
down vote

Circuit breakers do not "know" the voltage of the circuit they are used in, so cannot trip based on that voltage - they only trip on over-current.

However, they are designed and rated to operate correctly (trip cleanly) only up to a certain voltage - using a 32 volt breaker on a 120 volt circuit may result in the breaker arcing when it trips (likewise, using a DC-rated breaker on an AC circuit, or vice versa, may result in faulty operation.)

(GFCI and AFCI breakers may be more sensitive to voltage than normal breakers)

share|improve this answer

answered 1 hour ago

Peter Bennett

35.8k12864

add a comment | 

up vote
3
down vote

up vote
3
down vote

Circuit breakers do not "know" the voltage of the circuit they are used in, so cannot trip based on that voltage - they only trip on over-current.

However, they are designed and rated to operate correctly (trip cleanly) only up to a certain voltage - using a 32 volt breaker on a 120 volt circuit may result in the breaker arcing when it trips (likewise, using a DC-rated breaker on an AC circuit, or vice versa, may result in faulty operation.)

(GFCI and AFCI breakers may be more sensitive to voltage than normal breakers)

share|improve this answer

answered 1 hour ago

Peter Bennett

35.8k12864

Circuit breakers do not "know" the voltage of the circuit they are used in, so cannot trip based on that voltage - they only trip on over-current.

However, they are designed and rated to operate correctly (trip cleanly) only up to a certain voltage - using a 32 volt breaker on a 120 volt circuit may result in the breaker arcing when it trips (likewise, using a DC-rated breaker on an AC circuit, or vice versa, may result in faulty operation.)

(GFCI and AFCI breakers may be more sensitive to voltage than normal breakers)

share|improve this answer

answered 1 hour ago

Peter Bennett

35.8k12864

share|improve this answer

share|improve this answer

answered 1 hour ago

Peter Bennett

35.8k12864

answered 1 hour ago

Peter Bennett

35.8k12864

answered 1 hour ago

Peter Bennett

35.8k12864

35.8k12864

add a comment | 

add a comment | 

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