RS ISOLSEC, your reference partner for instrument transformers since 1954.


Our range includes current and voltage transducers, current transformers, split cores and resin insulators.


Our expertise covers energy metering, overcurrent protection, earth fault protection and differential protection.

Our technology measures high currents (up to 60,000A) and homopolar currents.


Some of our devices can be used in ATEX zones (consult us).

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RS ISOLSEC SUPPORTS BIODIVERSITY

Our Hive located in La Ferté St Aubin. With Adopt a Hive, we’re helping to save bees while improving our region’s biodiversity

EQUALITY INDEX AT RS ISOLSEC 2025: 87/100
Equality is our priority