Robust Construction
Robust Construction | Electrical Switches | Electrical | Petros
From tower cranes at sunrise to refinery maintenance at midnight, HEP keeps the current flowing. Our robust construction electrical range is engineered for punishing environments—dust, vibration, temperature swings, and relentless schedules—so your crews spend less time troubleshooting and more time building. Every component is field-tested with industrial-grade housings, corrosion-resistant contacts, and intuitive installation features that shave precious minutes off each job.
At the heart of this lineup are our precision-crafted electrical switches, designed to deliver crisp actuation and fail-safe performance even after thousands of cycles. Whether you’re powering temporary lighting banks, controlling heavy machinery, or integrating smart monitoring, these switches lock in confidence with IP-rated sealing and UL, CE, and IEC approvals baked in.
Pair them with our rugged enclosures, color-coded wiring solutions, and 24-hour technical support, and you have a turnkey ecosystem that treats harsh sites like a controlled lab. Choose HEP through Petros and flip the switch on uptime, safety, and unstoppable productivity.
FAQs
What types of robust construction electrical switches does Petros offer?
Petros supplies a complete range that includes heavy-duty toggle switches, rotary cam switches, push-button stations, emergency stop buttons, and change-over isolators. Each model is engineered for industrial and construction use, with current ratings from 10 A up to 125 A and voltage options up to 690 V AC.
What materials and protection ratings are used to ensure durability?
The enclosures are molded from impact-resistant glass-reinforced polycarbonate or powder-coated die-cast aluminum, fitted with stainless-steel hardware. Sealing gaskets and double-lip cable entries give ingress protection up to IP66/IP67, while reinforced actuator mechanisms are tested to IK09–IK10 impact ratings. All exposed metal parts are corrosion-resistant for long service life on site.
Can these switches be installed outdoors or in harsh environments?
Yes. Their high IP rating means they are dust-tight and protected against powerful water jets and brief immersion, making them suitable for wash-down areas, tunnels, quarries, marine docks, and exposed façades. Operational temperatures range from –40 °C to +70 °C, and UV-stabilised housings prevent degradation from sunlight.
How do I select the correct amperage and voltage rating for my application?
Identify the full-load current of the equipment and the system voltage (single-phase 230 V, three-phase 400 V, or higher). Choose a switch with a continuous current rating at least 20 % above the calculated load to allow for inrush or overload conditions. For motor circuits, confirm the AC-23A utilisation category on the data sheet; for resistive loads, AC-21A is sufficient. Petros’ technical table lists each catalogue number with its applicable rating for quick cross-reference.
Are there any special installation or wiring guidelines?
Mount the switch on a flat, rigid surface using the supplied stainless screws or M5 bolts. Maintain the mounting orientation specified in the manual to preserve the IP seal. Strip conductors to the indicated length, torque terminal screws to 1.2 – 2.5 Nm (model dependent), and use ferrules on stranded conductors. Always isolate the supply before wiring and perform an insulation resistance test after installation. Detailed step-by-step instructions are included with every unit and can be downloaded from our website.
What certifications and warranty coverage do Petros switches provide?
All robust construction switches are CE-marked and conform to IEC 60947-3 and IEC 60204-1 standards. Selected models carry UL and CSA approvals for North American markets. They are RoHS- and REACH-compliant and undergo 100 % routine dielectric and functional testing at the factory. Petros offers a 5-year limited warranty covering material and manufacturing defects, supported by local service centers and a guaranteed spare-parts program for at least 10 years.