Main risks

• Risk of electric shock from contact with live terminals or energised tracks during installation or maintenance.
• Overheating and fire due to contact overload, loose connections or insufficient ventilation.
• Electrical arcing and sparks when switching high or inductive loads, with possible contact deterioration and carbonisation.
• Equipment damage due to incompatibility between coil/control voltage, load voltage and load type (resistive, inductive or capacitive).
• Contact sticking or welding caused by currents above the permitted level, leaving the circuit unintentionally energised.
• Premature failure due to moisture, dust, vibration or ingress of foreign objects in open relays.
• In solid-state models, excessive heating if not properly dissipated and possible unwanted leakage currents.

Safe use

• Always isolate the supply and verify absence of voltage before wiring, replacing or handling the relay.
• Check compatibility of the coil/control voltage, the switching voltage and the load current before installation.
• Follow the manufacturer’s wiring diagram and observe polarity where applicable; physically separate low-voltage circuits from mains circuits.
• Ensure terminals are properly tightened and use suitable conductors; avoid stray strands that could cause short circuits.
• Provide appropriate upstream protective devices (fuses, miniature circuit breakers) and, for inductive loads, transient suppression measures to reduce arcing and spikes.
• Mount the relay on a stable support or appropriate rail and ensure adequate ventilation; do not cover slots or heat sinks.
• Perform a functional test after installation to check that it switches and deactivates correctly under real load.
• Do not use the relay as the sole means of emergency isolation or as protection against overcurrents.

Storage and maintenance

• Store relays in their original packaging, in a dry, clean location free from condensation, away from heat sources and vibration.
• Protect contact surfaces and terminals from dust and moisture; avoid impacts that could misalign mechanisms.
• Inspect periodically for: abnormal discolouration, burning smell, buzzing, chattering, cracks in the housing or loose terminals.
• Remove dust with a dry brush or low-pressure air; do not use solvents or water.
• Retighten connections with the power disconnected and replace the relay if blackened or stuck contacts, or signs of overheating, are observed.
• In solid-state models, keep heat sinks clean and ensure there is space to dissipate heat.

Restrictions of use

• Installation, wiring and commissioning to be carried out by persons competent in electrical work and risk control.
• Do not use in explosive atmospheres, in corrosive mists or outdoors without specific protection.
• Do not exceed the product’s rated voltage, current, ambient temperature or switching frequency.
• Do not modify, open or drill the housing; use compatible sockets, accessories and suppression modules.
• Do not use the relay for safety functions of people or machinery unless the device is specifically designed for that purpose.
• Keep out of reach of children and prevent access to live terminals.
• Avoid proximity to flammable materials and sources of intense heat that could affect its operation.