What are 3 pole breakers used for?
Used most often in a three-phase electrical system, a three-pole breaker connects three different conductors, such as is often required by heavy duty industrial motors. When a surge exists anywhere in the system, across one or more of the conductors, the breaker trips, the power bridge collapses, and the circuit opens.
What size breaker do I need for a 208 230?
The circuit breaker for this air conditioner circuit should be a 2-pole 30 amp breaker.
Are all 3 pole breakers 3-phase?
According to UL’s White book, “3–pole circuit breakers are suitable for use on 3-phase systems only, unless marked to indicate use on 1-phase systems, such as, “For 1–phase connections, use two outside poles,” or an equivalent statement.
How many volts is a 3 pole breaker?
Three pole circuit breakers Factories, workshops and commercial facilities, often have a 3-phase electrical supply. Three pole circuit breakers deliver 480VAC through three hot wires.
Can I use a 3 pole breaker for a 2 pole circuit?
The 3-pole P-frame breaker has a marking on the cover that states “single phase any 2 poles”. Therefore on a 120/240Vac system, it is ok to use any 2 poles of a 3 pole P-frame breaker.
What does 3 Pole mean in electrical terms?
3-pole means that the device plug is earthed and that it normally has three pins, of which two are used to transfer the current and one is used as personal protection. In all plug types, this earth connection was fitted as a 3rd pin.
What is 208 230v single phase?
The text Volts 208/230 Phase 1 means the device will run on either 208 volts or 230 volts (which is nominally 240 volts). In the amps section, the separated numbers (which are the same) are the corresponding value for operation on 208 or 230 volts, respectively.
Does single pole mean single phase?
A single pole breaker is connected to one end of the single phase. You can have many single pole breakers in one panel, half connected to one side of the single phase and half to the other side.
What is difference between pole and phase?
An electric “pole” describes an electric charge determined by the number of protons and electrons in a given atom. An electric “phase” describes the rate at which the voltage in an alternating current oscillates.
Is 208V single-phase or 3-phase?
208V 3 Phase power has 3 electrical legs (phases) evenly spaced in a circle (360 degrees / 3 phases = 120 degrees) around a center (neutral). Each leg (phase) provides power (phase voltage) at a unique angle (phase angle) to the center (neutral).