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Product Release Västerås, Sweden 04-03-2021

1 min read

Conformal coating for 670 and 650 series

Hitachi ABB Power Grids is pleased to announce that Relion® 670 and 650 series version 2.2 protection, control and monitoring relays are now provided with conformal coating for their electronic modules as standard. The conformal coating makes the relays very resilient in harsh environments or very humid ones, as specified in the ANSI/ISA S71.04 class G3.

Products applicable

The announcement covers the following devices of version 2.2: REB670, REC670, RED670, REG670, REL670, RER670, RES670, RET670, REB650, REC650, RED650, REL650, REQ650 and RET650.

Tests conducted

The tests were conducted in the Eurofins laboratories in Germany and comprised different sessions where the relays were exposed to corrosive substances (sulphur dioxide SO2, hydrogen sulphide H2S) and compounds (H2S+NO2+Cl2+SO2) for 21 days, as per IEC 60068 and ANSI/ISA S71.04 class G3.

User benefits

The known reliability of the Relion® 670 and 650 series will now be available even in harsh environments, making the relays very suitable for oil & gas industry and windfarm platforms.

About Hitachi Energy


Hitachi Energy is a global technology leader that is advancing a sustainable energy future for all. We serve customers in the utility, industry and infrastructure sectors with innovative solutions and services across the value chain. Together with customers and partners, we pioneer technologies and enable the digital transformation required to accelerate the energy transition towards a carbon-neutral future. We are advancing the world’s energy system to become more sustainable, flexible and secure whilst balancing social, environmental and economic value. Hitachi Energy has a proven track record and unparalleled installed base in more than 140 countries. Headquartered in Switzerland, we employ around 38,000 people in 90 countries and generate business volumes of approximately $10 billion USD.