How To Install Circuit Breaker

What is circuit breaker?

A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by excess current from an overload or short circuit. Its basic function is to interrupt over current flow after a fault is detected.

Working of circuit breaker

 A circuit breaker basically comprises of fixed and moving contacts. These contacts are contacting one another and conveying the current under ordinary conditions when the circuit is shut. At the point when the electrical switch is shut, the flow conveying contacts, called the cathodes, connected each other under the weight of a spring.

Timings involved in total fault clearing time

  • Relay time
  • Breaker interrupt time
  • Current detector
  • Aux Trip time
  • Transfer trip time
  • Remote Breaker interrupt time

Here is the pictorial representation of this

What are solar panels?

Photovoltaic sun based boards ingest daylight as a wellspring of vitality to produce power. A photovoltaic (PV) module is a bundled, associated gathering of commonly 6×10 photovoltaic sun powered cells. Photovoltaic modules establish the photovoltaic cluster of a photovoltaic framework that creates and supplies sun oriented power in business also.

Working of circuit breaker in solar power

Steps included in installation of circuit breaker

Following are the key steps to install the circuit breaker

Choose the right Circuit Breaker for Solar panel:

The control originating from your grid tie close planetary system is 240VAC so you will require a two fold shaft electrical switch of the correct flow rating.

Make sure Current Ratings:

current rating = Inverter nominal output current x 1.25. Example: 17 x M215 Enphase Micro inverters have a (combined) output current of 17×0.9A = 15.3A. The next higher common rating in 20A.

Follow the code

There is a Code Rule (NEC 690.64(B)(2)) that’s says you must not exceed a certain size Circuit Breaker for Solar. This is defined as 20% of the overall home’s service rating.

Place breaker in right direction

Another code rule says you need to put these solar circuit breaker at the opposite end from the main circuit breakers.

Installing a circuit breaker:

The main reason for installing a new circuit breaker in an existing home is to take some of the load off of another circuit breaker,  If there is one circuit breaker that is connected to too many electrical devices then it may be wise to install another circuit breaker and split the burden.

Steps to be followed in installing the breaker

  •  First step to circuit breaker installation is to shut off the power at the main panel. It is extremely important to make sure the circuit breaker panels or sub-panels do not have any live wires.
Turning off the power to the sub-panel by switching off the supply breaker at the main panel.
  • Second step is to make new cable clamp for the breaker
Inserting an NM-B cable clamp in knock-out hole in breaker panel.
  • Third step Connecting the ground wire to the ground bar
Ground bus bar in circuit breaker panel.
Inserting bare ground wire into empty slot in ground bus bar, in circuit breaker panel.
  • Fourth step is to connect neutral wire into neutral bus
Bending neutral wire to fit neatly inside panel.
  • Fifth step is to install actual breaker device
Pushing circuit breaker into place in panel.

Internal view of circuit

Circuit breaker installation is typically done to protect the device in case of fault occurs

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