Solar Market Outlook in Senegal
A partnership between the World Bank, IFC, the European Investment Bank and Proparco has worked together to finance two solar PV plants in Senegal. This solar project is projected to provide clean and sustainable power from solar sources for more than half a million Senegalese residents.
The two solar plants mentioned above were launched in May of 2021 with a total solar capacity of 60 MWac. The plants will generate energy with a tariff making it one of the cheapest electrical costs in the Sub-Saharan region of Africa. But apart from the access to affordable and sustainable energy, it’s the ability to reduce carbon emissions by 89,000 annually that will be the biggest benefit of installing these new plants.
The two projects are a result of the auctions that were tendered by the Senegalese government through the Energy Regulatory Commission. Despite the growth in the number of residents in the country that now has access to power, there is still a significant amount of them that lacks access to electricity. But things are looking up with the affordability of solar power especially since the previous source – fuel imports – was too costly for the economy to sustain.
Solar Energy Equipment Supply Capacity in Senegal
The availability of local suppliers of solar power in Senegal is rather limited. However, there are plenty of local and online suppliers of solar power equipment to small- and large-scale installations.
Top 8 Major Seaports & Logistics in Senegal
Senegal benefits from its exceptional location that facilitates efficient and easy logistics and trade activity. It has many functioning ports used for commercial activity such as Dakar, Thies, and Ziguinchor.
When installing a solar panel system, you have to be familiar with the electric breakers and how it works with a solar PV system to avoid future electric problems. The electric breaker is one of the main components of a solar power system that provides safety mechanisms. If ever the electrical wiring of your system has too much current flowing through it, these breakers can easily cut the power until your solar installer can fix the system’s problem.
For today’s article, we will discuss electric breakers and their function in solar photovoltaic systems.
What is an Electric Breaker?
An electric or circuit breaker is an electrical switch designed to protect electrical circuits from damage caused by overloading of current or a short circuit. The basic function of an electric breaker is to prevent the current flow once protective relays detect a fault in the system.
Although it is frequently interchanged with a fuse, which is the simplest Over Current Protection device (OCPD) in electrical circuits, a circuit breaker, is a much-evolved type of device that interrupts the current flow. The main difference between the two is electric breaker is resettable and the fuse is not. The fuse sacrifices itself while protecting the system to overheat, while the circuit breaker can withstand hundreds and thousands of operations. Another difference is that electric breakers are used with relatively higher currents.
Components of Circuit Breaker
A circuit breaker system is composed of three parts. These three components are the sensing system, relay, and the combination of contacts and the contact actuator. A sensing system is responsible for detecting an overload situation, while a relay is responsible for transferring the information to the switching arrangement, and the combination of contacts and the contact actuator. This electric arrangement is usually observed in power transmission and distribution networks dealing with very high currents, voltages, and powers.
Circuit Breakers Calculation in Solar Panel Systems
When connecting circuit breakers to the PV system, you have to follow the recommended calculations to avoid future problems and damage to the entire system. The recommendations for using overcurrent protection devices including circuit breakers in solar modules against overloading conditions are given in IEC 60269-6 (volume 6 of IEC 60269-6) and also UL 248-19.
For circuit breakers, IEC recommends a 20% and 25% margin in voltage and overload current. Most of the time, the ratings are specified by the solar manufacturers at given ambient conditions. If the temperatures exceed this given value, derating must be applied according to the manufacturer’s specifications.
When it comes to breaker sizes for solar panels, NEC requires the breakers to be sized at 125% of the inverter’s rated output. So a 7680W inverter that outputs 240V, outputs 32A (7680W ÷ 240V = 32A). That requires a 40A breaker (32A x 125% = 40A).
If you owned a solar panel system at home, you have to understand how circuit breakers work to prevent catching fires at home. These devices are one of the major components of the PV solar system as they protect the system wiring from getting too hot and accidentally catch fire if short circuits occurred. Thus, understanding the breaker itself and its proper calculations in the PV system should be done.