Enclosures and accessories
Industrial relays, DIN rail terminal blocks and power distributors complete the equipment of any electrical…
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Electrical panel equipment refers to the full set of interfacing, connection and distribution components that complement protective devices. This equipment includes industrial relays, power distribution blocks and DIN-rail terminal blocks, with ratings covering applications from automation to the photovoltaic industry. Compliance with IEC 60947 and CE marking guarantee their reliability in industrial environments.
Industrial relays and interfacing solutions for electrical panels
Multi-brand ranges and relay types available
In the field, we find that the choice of industrial relay directly determines the reliability of automation chains. Our range covers Finder's 38, 39, 46 and 55 series, as well as Phoenix Contact and Omron references. Power relays, EMR/SSR interfaces and PCB-mount versions each meet specific switching requirements. Our installation feedback shows that EMR interface relays favour mechanical robustness, while SSRs suit fast switching cycles in heating or lighting.
Concrete applications of relays in electrical panels
We see intensive use of these relays in lift panels, where the control sequence demands absolute reliability of the auxiliary contacts. Automated warehouses and the food-processing industry also make heavy use of this equipment for sensor-actuator interfacing. Our standard practice favours screw-terminal relays for vibrating environments, and spring-terminal versions for reduced wiring time.
Power distribution blocks and terminal blocks for internal distribution
Junction blocks and DIN-rail terminal blocks
Junction blocks and DIN-rail terminal blocks provide electrical continuity and distribution of secondary circuits within the panel. Silver-plated copper terminals guarantee stable contact resistivity over time, even with cyclic thermal variations. Polyamide housings resist the chemical agents commonly found in the food-processing industry and withstand the mechanical stresses of DIN-rail mounting.
Distribution and isolation of circuits
Feedback from installers confirms that power distribution blocks make it possible to structure the panel's internal architecture without multiplying individual connections. This centralisation reduces potential failure points and makes future maintenance easier. We recommend sizing distribution blocks according to the combined current of the outgoing circuits, with a 20% margin over rated values to absorb transient inrush currents.
Compliance standards and selection criteria
CE marking and IEC 60947 compliance
CE marking confirms compliance with European safety requirements for electrical equipment. The IEC 60947 standard precisely defines the characteristics of distribution blocks and terminal blocks in terms of breaking capacity, short-circuit withstand and utilisation categories. Our commissioning tests show that compliance with this standard determines whether installations are accepted by inspection bodies.
Materials and finishes suited to the environment
The polyamide of the housings offers a high level of mechanical protection and fire resistance compliant with the requirements for panels in indoor industrial settings. The silver-plated copper of the terminals limits oxidation and maintains contact quality over the installation's service life. Our installation experience confirms that these materials strike an optimal balance between cost, durability and ease of connection.
Frequently asked questions
What is the difference between an EMR relay and an SSR relay for an electrical panel?
The EMR (electromechanical) relay switches via physical contact and withstands momentary overloads, while the SSR (solid-state) relay eliminates mechanical wear and suits high switching frequencies. The choice depends on the type of load and the expected number of annual cycles.
How should a power distribution block in a panel be sized?
The rated currents of all the outgoing circuits supplied must be added together, then a diversity factor applied according to the application. The distribution block's technical documentation states the maximum admissible current per bar and the number of possible connections.
Does the IEC 60947 standard apply to industrial relays or only to terminal blocks?
The IEC 60947 standard specifically covers distribution blocks and terminal blocks. Industrial relays generally fall under IEC 60947-5-1 for switching elements, or under manufacturer-specific product standards.
Why choose silver-plated copper for connection terminals?
Silver-plated copper reduces ohmic contact resistance and slows the formation of oxide film, which preserves tightening quality and limits heating at connection points over the electrical panel's service life.