What type of breakers are more effective for solar solutions?

[Elec_]

Hey everyone,

I'm looking into setting up a solar power system and need some advice on the best type of circuit breakers to use. I've heard that there are different types.

Can anyone share their experiences or recommendations on which type is more effective for solar solutions? Any tips on what to consider when choosing the right breaker would be super helpful!

Thanks in advance!

[Manon_Chaboud · Accepted solution]

Hello @Elec_, 

When selecting circuit breakers for solar solutions, it's essential to consider the specific needs of your solar power system. Circuit breakers play a crucial role in protecting solar installations from electrical faults, ensuring safety, and optimizing performance. 

There are two types of circuit breakers for Solar Solutions:

1.  DC Circuit Breakers: these are designed to handle direct current (DC) from solar panels. They are essential for protecting the DC side of the system, preventing damage from overcurrents and short circuits.
2. AC Circuit Breakers: these breakers protect the alternating current (AC) side of the system. They ensure that any faults in the AC circuit are quickly isolated to prevent damage and maintain safety.

When choosing a breaker, consider the following factors:

- System requirements: understand the voltage and current ratings needed for your system.

- Environmental factors: ensure the breaker can withstand the environmental conditions where it will be installed.

- Compliance with standards: verify that the breaker conforms to relevant standards such as IEC 60947-2.

Our recommended product: EasyPact MVST3

For those looking for a reliable and high-performance solution, the EasyPact MVS T3 is an excellent choice. Here are some of its standout features:

- One frame size: simplifies installation and maintenance.

- Current rating: up to 4000A, suitable for large-scale solar installations.

- Voltage rating: Ue up to 1140V AC, with IT 800V AC applicable (annex H compliant).

- High breaking capacity: Ics=100%Icu=Icw=66KA, ensuring robust protection.

- Intelligent electronic protection system: enhances safety and efficiency.

- Compliance: conforms to IEC 60947-2, ensuring adherence to international standards.

- Wide range of accessories: offers flexibility and customization for various applications.

Additionally, the EasyPact Solar MCCB is another great option, providing scalable and reliable protection for renewable energy applications. It features:

- Current rating: up to 800A.

- High breaking capacity: up to 50kA.

- Insulation voltage: 1250V AC.

- TM & ETU releases: for precise protection settings.

- Wide range of accessories: enhances versatility and ease of use.

For more detailed information and to explore the full range of products, you can check out the catalogs attached.

By carefully selecting the right circuit breakers, you can ensure the safety, reliability, and efficiency of your solar power system.

Best regards,

[Gregoire_Brun]

Hello @Elec_ 

To complete @Manon_Chaboud answer, Key factors to consider include the network connection (DC/AC) and the voltage range (from 415V to 1000V for AC, and from 48V to 1500V for DC), as well as the short circuit capability.

Another important aspect is the integration constraint. Few panel builders offer panels that are certified for 800V or 1000V, making it a challenge to obtain such certifications.

Environmental constraints are also significant due to the ambient temperature, which can affect the breaker. The load percentage seen by the breaker can be higher than in distribution systems, so it is crucial to choose the right derating applicable to the product.