Purchasing Guides
Our purchasing guides detail the selection criteria and uses of various electrical products, such as transfer…
Our purchasing guides detail the selection criteria and uses of various electrical products, such as transfer switch, energy meters, time switches and more. Choose the right products to optimise the performance and safety of your installations.
How do I choose current transformer for my power metering and monitoring?
Choosing a current transformer (CT) for a power analyzer relies on 5 criteria: rated primary current, accuracy class (0.5 or 0.2), VA rating, type (solid core, split core, Rogowski), and compatibility. Complete guide with sizing example.
What are the different types of applications for a transfer switch?
A transfer switch redirects power supply between two electrical sources (utility/generator, utility/utility, or local source/local source) while guaranteeing isolation through mechanical interlocking. This article covers the three application categories, manual, remote-controlled and automatic types, sizing criteria, and the Socomec ranges available at Optim-Elec.
How to choose a DC disconnector switch for your photovoltaic installations?
A DC disconnect switch is mandatory in every PV installation to isolate the panels from the circuit. This guide covers 5 selection criteria: DC rated voltage, rated current, DC breaking capacity, IP rating and mounting type. Compliant with UTE C 15-712-1 and IEC 60947-3. Telergon F1 range at Optim-Elec.
When should I use a disconnect switch with visible cut-out?
A visible-break disconnect switch allows visual verification that the contacts are physically open, eliminating all doubt about the actual circuit state. This article explains its definition, mandatory applications (industrial sites, public buildings, fire safety, MLVS), the difference from a standard disconnector, and the Socomec SIRCO MV range.