Արևային ֆոտովոլտային ինվերտորի պաշտպանության համար ճիշտ անջատիչների ընտրությունը

Protecting your solar PV inverters cannot be undermined. These արևային ինվերտորներ are not only complex in structure, but they are also exposed to several environmental factors and potential faults. Without protection, electrical accidents can easily happen, risking the lives of the people around.

One of the best ways to protect these devices is by using the right PV circuit breaker inverter operators should ensure they have. But, what are these circuit breakers, how do they work, and how to choose what suits you? This article tackles the following:

– Introducing circuit breakers for solar PV inverters

– What make them distinct from other circuit breakers?

– How to shop for the right breaker

What Are Circuit Breakers for Solar PV Inverters?

Safety is paramount in your industry, and so you need the right equipment. Circuit breakers for solar PV inverters, such as a solar panel circuit breaker, are essential for protecting both the system running the solar and the electrical infrastructure connected.

These breakers disconnect power automatically should there be overloads, short circuits, or faults, thus preventing fire and electric shocks from happening.

In a photovoltaic breaker, systems are installed on both the DC side – or that which lies between the panels and the inverter – and the AC side, which is between the inverter and grid, or load, safeguarding the most important components.

For instance, TOSUNlux’s has a DC circuit breaker for solar equipment designed to provide overcurrent protection in appliances or electrical equipment. Lastly, it is important for these devices to adhere to industry standards to keep things safe, such as how our products, like the TSB5-125 series MCB comply with IEC60898-1 or IEC60947-2 standards.

TSB5-125 Miniture անջատիչ

TSB5-125 Miniature Circuit Breaker offers reliable protection for circuits up to 125A. Ideal for residential, commercial, and light industrial applications.

Դիտել Ապրանքը

What Sets Them Apart From Other Circuit Breakers?

A very interesting question to answer. To know what sets a photovoltaic breaker from other PV circuit breakers is on how they work.

There are two processes that are at play here. First is the thermal protection mechanism, while the other is the magnetic protection mechanism.

Thermal Protection Mechanism

In this mechanism, the breaker trips the moment the current reaches its rated value. Right as excessive current flows through, the breaker’s bimetallic contacts inside heat up and expand, eventually causing the breaker to disconnect the circuit.

This mechanism has showcased its effectiveness for prolonged overloads, avoiding overheating and potential damage to the components.

Magnetic Protection Mechanism

On the other hand, magnetic protection is all about responding to sudden surges or huge fault currents. When a noticeable fault occurs, the magnetic coil inside the breaker generates a force that instantly trips the breaker.

It is because of this rapid response that short circuits and severe electrical faults are prevented, thus ensuring the safety of the surroundings.

Things to Consider When Choosing the Right Circuit Breakers for Solar PV Inverter Protection

Several factors must be considered when shopping for the ideal circuit breakers for your solar PV inverter protection:

1. Ambient Temperature Throughout the Cable

Since where they go with, the solar PV systems, are usually installed outdoors, ambient temperatures are way higher than those indoors. With higher temperatures, the ampacity of both cables and the breakers is reduced. When they are, the risk of overheating increases.

Industry standards state manufacturers must provide derating tables or temperature compensation curves, which should go in consultation to adjust the current rating of the breaker based on the conditions of your site. Choose breakers that ensure the safest operation.

2. Mutual Heating of Solar Circuit Breakers

There are times when what you have are several inverters connected and operating at the same time. In this situation, premature tripping can occur, since adjacent circuit breakers can heat up each other.

In order for you to address this, you must keep the spacing adequate in-between breakers or use correction factors in technical datasheets. Be prepared to go for a higher-rated breaker or increase the distance between devices if the adjusted rating isn’t enough. This improves heat dissipation.

3. Ambient Temperature at the Breaker

Due to this heat and simultaneity impacts, a PV system’s distribution board, especially those indoors, can experience higher temperatures. This affects the performance of the breaker.

To address this, refer to the technical data of the manufacturer to make sure the selected breaker can handle the increased temperatures without reducing the power rating below the current requisite.

DC մանրանկարչություն անջատիչ TSB5-63DC

TSB5-63DC DC Miniature Circuit Breaker ensures safe and efficient protection for low-voltage DC systems, ideal for solar and industrial use.

Դիտել Ապրանքը

4. Connected Device Type

Of course, the type of connected device must also be considered. Circuit breakers must have a load disconnect capacity that safely isolates the inverter from the grid under load. Avoid using the wrong fuses as disconnectors since they lack proper features and may get damaged while in operation. Use only breakers rated specifically for load disconnection between the inverter and utility grid.

5. Amount of Isolator Strings

With regard to the isolator, the number of strings, as well as the poles, should match. A single pole must have one string, and there should be two strings for a double-pole, no more and no less. Or else, you are compromising performance.

6. Size of Your System’s Voltage

Lastly, the circuit breaker’s voltage rating should be equivalent to or greater than your system’s highest operating voltage. The rule of thumb is to choose a breaker rated above the system’s open-circuit voltage to ensure safety and reliability in protection.

Եզրակացություն

Make certain you carefully consider all those factors listed above. Once you do, you can arrive at the right circuit breakers for your solar PV inverter protection, ensuring safety, reliability, and efficiency in the operations of your systems.

TOSUNlux, our company, specializes in providing electrical equipment and products that suit your very needs. Our ապրանքանիշի պատմություն is simple. We continue to innovate so we can serve our wide range of clientele across over 90 countries globally. Let’s revolutionize your electrical systems. Get a quote now from our team!