Why should we require certification of the DPS that goes in the string box?

Compliance with technical standards is essential to ensure protection against outbreaks and preserve lives
SOLAR CHANNEL - Why should we require certification of the DPS that goes in the string box?
CLAMPER protection solution. Photo: CLAMPER/Disclosure

The compliance certification of a DPS (Surge Protection Device) is an essential aspect to guarantee the effectiveness and safety of the equipment.

The ABNT NBR IEC 61643-11 (DPS for application in low voltage alternating current systems) and ABNT NBR IEC 61643-31 (DPS for application in photovoltaic systems) standards establish the necessary requirements to assess the compliance of DPS, ensuring that the devices meet the necessary safety and quality standards in the installations.

The use of DPS without a certificate of conformity can have serious consequences for electrical equipment and, in extreme cases, put people's safety at risk. This is the statement by Douglas Lara, Applications Engineering coordinator at CLAMPER.

According to him, without certification, it is not possible to guarantee that the DPS has been tested and approved in accordance with the safety and quality requirements established by the standard. “This means that the device may not offer the necessary protection against electrical surges, which is one of the main causes of failures in electrical equipment,” he explained.

Electrical surges can be caused by a variety of factors, including lightning strikes, electrical system surges, and other electrical anomalies. Without a proper, certified SPD, these surges can seriously damage electrical equipment such as inverters and modules, leading to data loss, service interruptions, and even fires.

Therefore, in his view, it is essential to use DPS with a certificate of compliance in accordance with the standards in any electrical system. This certification guarantees that the device has been tested and approved following strict safety and performance standards, providing the necessary protection against electrical surges and ensuring the safety of everyone involved.

“The issuance of certificates of conformity is a responsibility assigned only to nationally or internationally accredited product certification bodies (PCOs). In Brazil, these PCOs receive permission from the INMETRO to carry out this activity”, he pointed out.

SOU+CLAMPER trains electricians on the use of DPS in MG

DPS certification process

During the process, a rigorous technical analysis of the inputs and documents used to manufacture the product is carried out. In addition, periodic audits are carried out at the factory, certifying that all procedures are carried out in accordance with the project, ensuring that the DPS manufacturer is committed to providing high-quality products to its customers.

“Also as a criterion for certification, the product must the tests of the applicable standards. These tests must be carried out in accredited laboratories, with international recognition, following standardized procedures, which further increases the level of reliability of the results”, emphasized the specialist.

The DPS Certificate of Conformity is only issued by the O after approval of all evaluation stages, guaranteeing the high standards of design, production and performance of the products.

According to CLAMPER's Applications Engineering coordinator, when purchasing the string box, it is essential to check whether the surge protection device has a compliance certification issued by accredited certification bodies.

“The protection solutions of CLAMPER, such as CLAMPER Solar SB, is the guarantee of investing in certified products that guarantee compliance with the declared performance requirements and safety requirements for installations and people”, concluded Douglas Lara.

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Photo by Mateus Badra
Mateus Badra
Journalist graduated from PUC-Campinas. He worked as a producer, reporter and presenter on TV Bandeirantes and Metro Jornal. He has been following the Brazilian electricity sector since 2020.

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