A medium voltage substation is responsible for transforming high voltage electrical energy (received from transmission networks) into lower levels, suitable for distribution.
This way, they ensure that energy reaches industries, businesses and other large consumers efficiently and safely.
Therefore, these systems are essential for the balance and functioning of the electrical grid, controlling the flow of energy and protecting against overloads and failures.
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Learn about the types of Medium Voltage Substations
Medium voltage substations can be classified based on different characteristics, such as the location and type of protection of their components.
Thus, according to the standard NBR 14039, medium voltage substations can be:
- Sheltered substations: components installed inside buildings, protected from weather conditions such as rain and dust;
- Overhead substations: installed on poles, suitable for small projects due to the simplicity of the structure;
- Weather substations: equipment installed outdoors, exposed to the environment, requiring greater protection against natural elements;
- Armored substations: components protected inside metal cubicles, mitigating the effects of short circuits and other damage;
- Switchgear substations: intended for the control and protection of sections of the network, without performing voltage transformation;
- Transformation substations: responsible for transforming the voltage between two sections of the electrical network, which can be step-up or step-down.
See what the components of a substation are
The main components of a medium voltage substation are:
- Circuit breakers: protect the installation by interrupting the circuit under abnormal conditions;
- Protection Relays: monitor the substation, identifying and isolating faults in the circuit;
- Current Transformer (CT): adapts the electrical current for measuring and protecting relays;
- Potential Transformer (TP): adjusts the nominal circuit voltage for measuring and protection equipment;
- Power Transformer: responsible for adjusting the voltage between the primary and secondary circuits. It can be oil or dry.
>> You may also like to read: Dry and oil transformer, what are the differences?
Pay attention to current regulations
It is essential to follow current regulations when designing and installing medium voltage substations, as they guarantee safety and efficiency in energy supply.
THE NBR 14039, for example, establishes the parameters for electrical installations with voltage between 1.0 and 36.2 kV, applying to all equipment in this range.
Therefore, this standard addresses aspects such as types of substations, safety distances and ventilation.
For low voltage installations, the NBR 5410 defines the conditions of cable sizing, equipment and protection devices for voltages up to 1 kV.
Already the REN 414/10 regulates the energy supply, especially for consumer units with an installed load above 75 kW, determining the need for substations with transformers suitable.
Bring your medium voltage substation project to Trifásica Elétrica
At Trifásica Elétrica, you'll find all the materials you need to install medium-voltage substations, ensuring efficiency and safety in your project.
Additionally, we offer special projects of cabins armored, developed with high quality materials, always within current technical standards.
Our commitment is to equipment excellence and durability, providing solutions that meet the demands of any enterprise.
We offer nationwide service, adapting our products to all the standards required by energy providers.
So you can trust Trifásica Elétrica to provide cutting-edge materials and custom designs that ensure the best performance for your substation.
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