Learn to Differentiate the Types of Circuit Breakers

The breakers are shattering mechanisms for the security of a home, because they have the function of protecting the entire power grid of a residence. Its function is to prevent overloads in the electrical system, preventing the burning of electronic devices and even fires. There are technical rules that determine the capacity of the circuit breakers according to the current that the network will receive.

If the capacity of a circuit breaker is exceeded it is disarmed automatically, preventing overloads pass to the power grid. For each type of electrical installation there is a specific model of circuit breaker, the choice of circuit breaker to be used depends on several factors. Before installing circuit breakers, must evaluate the type of mains, electrical cables and also what equipment will be connected on that network.

The three categories for types of circuit breakers

The difference between the types of circuit breakers is on the number of poles. There are the Unipolar bipolar three-pole breakers, and you have 1, 2 or 3 poles, respectively. We will comment below about these types of circuit breakers, stay tuned and learn how to differentiate them.

Unipolar circuit breakers or Monopole

These circuit breakers must be used on circuits of 127v, also called phase. It is not recommended to install unipolar circuit breakers 220v, because any problem installing or electrical appliance, may cause the shutdown of only one switch and keep a phase connected directly to the appliance, this may bring risks of electric shock as well as damage to the appliance.

Bipolar circuit breakers

This type of circuit breaker must be used in two-phase circuits of 220v. This model is recommended connecting electric showers and faucets.

Three-pole circuit breakers

This model is suitable for three-phase circuits, such as: three-phase systems with 220v to 380v. The configuration of these circuits depends on the availability of the Setup project and also the electrical network.

The circuit breakers are also divided by 3 types of curves

The NBR ABNT NBR 5410 5459 and determine that B circuit breakers must act to short-circuit currents between 3 and 5 times the rated current, the circuit breakers of the curve C work between 5 and 10 times the rated current and circuits D curve respond to currents between 10 and 20 times the rated current.

B breakers

Are recommended to load Bank with low starting current. In the case of incandescent light bulbs, electric ovens and electric heaters.

Circuit breakers C curve

These are can be used in current average starting loads, such as washing machines, fluorescent lamps and motors.

Breakers D curve

These breakers are recommended for large current loads, for example, the low voltage transformer.

It is important that there be an awareness to prevent people without proper training and knowledge needed to perform services with electricity. All types of circuit breakers must be installed only by trained professionals, because it involves an extremely periculoso agent. Don’t forget to turn off the power to work with electrical installations.

Share your knowledge of circuit breakers. Leave your comment below!

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