What is and where to use 1P, 1P+N, 2P, 3P, 4P. Scheme, description

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ENCYCLOPEDIA OF RADIO ELECTRONICS AND ELECTRICAL ENGINEERING
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What is and where to use 1P, 1P+N, 2P, 3P, 4P. Encyclopedia of radio electronics and electrical engineering

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Encyclopedia of radio electronics and electrical engineering / Electrician's Handbook

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The question is often asked what is 1P, 1P+N, 2P, 3P, 4P and in what cases one or another circuit breaker can be used.

P - protection against short circuits and overloads.

N - there is no protection, only an on and off function

What is and where to use 1P, 1P+N, 2P, 3P, 4P

single pole 1P (single-phase) circuit breaker, used in 220 volt networks, for group and individual loads.

Recommended use for lighting groups, but often used for any single-phase load (sockets, water heaters, air conditioners, etc.)

1P+N

Bipolar with neutral contact 1P+N (single-phase with zero) circuit breaker, used in 220 volt networks, for group and individual loads.

Recommended application for lighting groups and sockets, neutral pole is sometimes used as a normally open contact, for connecting automation and alarms, phase pole status information (incl. I or off. 0)

Bipolar 2P (two-phase) circuit breaker, used in 220/380 volt networks, for group and individual loads.

Recommended application as an introductory machine for an apartment or other consumer, convenient for connecting an individual load (water heater, welding machine, etc.)

Tripolar 3P (three-phase) circuit breaker, used in networks of 380 volts, for individual loads.

Recommended application as a feeder for an electric motor or another three-phase consumer with a symmetrical load, often used as an introductory machine for group single-phase loads (switchboards)

four-pole 4P (three-phase with zero) circuit breaker, used in 380 volt networks, for individual loads.

Recommended application as an introductory circuit breaker in switchboards with unbalanced single-phase consumer load.

Publication: electro.narod.ru

See other articles Section Electrician's Handbook.

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