SOS Summer for Gate Automation: How to Protect Electronics from Record Heat and Sudden Storms

The months between June and September put the operational efficiency and structural longevity of every type of automatic gate motor to a severe test. When ambient temperatures consistently exceed the threshold of 35°C, with peaks on asphalt and close to metal fences easily approaching 50°C, the internal components of automation systems undergo stress that cannot be ignored. A proper analysis of the effects of heat is divided into both a purely mechanical and an electronic level.

From a mechanical point of view, high temperatures significantly alter the physical properties of lubricating fluids. The grease and oil contained within gearmotors and hydraulic pistons tend to liquefy excessively, reducing their viscosity. This loss of consistency compromises the protective film that prevents direct friction between steel gears. In the absence of optimal lubrication, sliding friction increases premature mechanical wear, causing microscopic material detachment which, over the long term, leads to jamming or irreversible failure of the gearmotor. Furthermore, the plastic materials and technopolymers used for bushings and structural limit switches are affected by thermal expansion cycles, undergoing millimeter-level variations that can cause misalignments during the stopping and deceleration phases of the automation.

On the electronic front, the main problem lies in the thermal dissipation of the integrated circuits present in the automatic gate control unit. The electronic control boards are housed inside plastic protective boxes (often with an IP55 protection rating or higher to resist water) which, while on one hand preventing the penetration of moisture and rain, on the other hand preclude the natural dissipation of heat generated by transformers and power transistors (MOSFETs). The thermal gradient between the inside of the enclosure and the external environment is reduced, limiting cooling efficiency. When the internal temperature of the microprocessor exceeds the safety thresholds set by the manufacturer (usually around 85°C), the thermal protection systems of the logic board intervene, causing temporary software anomalies, sudden board lockouts, temporary erasure of stored radio codes or, in the worst cases, total damage to the copper traces due to localized overheating.

Technical Note from VDS Automazioni: All shells and enclosures for VDS control units are designed using technopolymers additived with anti-UV filters, specifically formulated to resist premature aging caused by direct solar radiation and to maintain their mechanical and insulation properties unaltered even at extreme operating temperatures.

The Phenomenon of Summer Storms: Lightning, Overvoltages, and Insulation Risks

Modern summer is characterized by increasingly violent and sudden atmospheric phenomena: intense heatwaves are frequently interrupted by sudden, high-energy storm disturbances. These events introduce drastic risks to the safety of outdoor automation systems. The primary danger is represented by transient overvoltages induced by atmospheric discharges (lightning).

A lightning strike that falls in the vicinity of a home does not necessarily have to hit the structure directly to cause damage. The discharge generates an extraordinarily intense electromagnetic field that induces high-voltage stray currents in underground or aerial electrical cables of the public distribution network. These overvoltages travel along the power supply lines until they reach the gate’s electronic board. The most sensitive components, such as rectifier diodes, filter capacitors, and the input stages of the 230V line, are literally burned by the destructive energy of the discharge, which far exceeds the dielectric strength of the semiconductor materials. The result is the instantaneous destruction of the control unit, with the consequent need for a complete replacement of the electronic block.

Another critical factor closely linked to summer storms is the sudden variation in relative humidity and storm rainwater penetration. During a heavy downpour accompanied by driving wind, water can creep through micro-fissures caused by sun-worn seals or improperly sealed cable glands. When water comes into contact with the live electrical terminals of the motor or photocells, ground current leakages occur. This phenomenon immediately trips the residual current device (RCD/circuit breaker) of the home’s main electrical panel, isolating not only the automation but leaving the entire property in the dark. Identifying the exact cause of a micro-leakage due to humidity requires time and specific technical skills, leaving the end-user in a situation of severe discomfort.

Technological Advantages of Low Voltage (24V) Motors with Backup Batteries

To effectively mitigate the risk of remaining locked outside one’s home due to an electrical blackout induced by a storm or a summer grid overload, the most efficient engineering solution is the adoption of automation systems operating at low voltage, specifically 24V DC. Direct current technology offers incomparable structural advantages compared to traditional 230V AC systems, especially in complex climatic contexts.

In addition to continuity of service, 24V motors dissipate a significantly lower amount of heat compared to their 230V counterparts during movement phases. This happens because the efficiency of direct current motors is higher and the currents involved allow for electronic regulation of the delivered power. Consequently, even under the scorching July sun, the 24V motor undergoes reduced internal heating, warding off the specter of thermal lockout due to intensive use. This makes 24V systems the choice of necessity for condominium or corporate contexts, where the number of consecutive maneuvers is high even during the hottest hours of the day.

On-Field Prevention: Summer Maintenance Checklist for the Installer

Proper planning of preventive maintenance interventions allows industry professionals to build customer loyalty and eliminate emergency calls during the month of August—a period when sourcing spare components is complex due to festive company closures. A professional inspection procedure divided into five operational phases, applicable to existing systems, is structured below.

Phase 1: Mechanical Inspection, Kinematics Analysis, and Targeted Lubrication

The installer must proceed with the manual release of the motor to check the smoothness of the gate leaf’s movement along its entire travel. In sliding gates, it is essential to examine the condition of the rack and the drive wheels: the presence of debris, sand, or accumulations of old grease hardened by the heat generates localized friction that forces the motor to exert greater effort. The rack must be perfectly aligned with the pinion, maintaining a constant clearance of about 1–2 mm to prevent the weight of the gate from bearing directly on the motor shaft.

For swing gates, it is necessary to check the support hinges, verifying the absence of structural sagging of the pillars caused by thermal expansions of the ground. Lubrication must be performed exclusively with products resistant to high temperatures, such as lithium greases additived with PTFE, which maintain their stable chemical-physical characteristics from -20°C to +150°C, avoiding the use of light oils that would evaporate in just a few days.

Phase 2: Electronic Check-Up of the Control Unit Box and Tightening of Connections

Opening the control unit enclosure requires the utmost attention. It is necessary to visually inspect the board to identify any signs of overheating (discoloration of the printed circuit board, swollen or deformed capacitors). The intense heat can cause micro-expansions of the metallic conductors inside the screw terminals; therefore, the installer must check the correct tightening of all electrical connections, particularly those of the 230V power supply line and motor cables, where the passage of high currents in the presence of loose contacts would generate dangerous electric arcs and localized overheating.

Phase 3: Prophylaxis Against Insect and Reptile Intrusion

During the summer, the heat drives insects (ants, geckos, spiders, wasps) to seek refuge inside the watertight control unit boxes or inside photocell shells, attracted also by the weak electromagnetic fields that generate a comfortable microclimate. The bodies of these small animals, depositing themselves on the live traces of the board or between relay contacts, cause destructive short circuits. The installer must thoroughly clean the inside of the enclosures using compressed air spray and specific disinfectants, subsequently ensuring the sealing of cable glands and unused drain holes through the application of neutral silicone resins or intact rubber cable glands.

Phase 4: Performance Testing of Safety Devices and Photocell Optics

Direct and perpendicular solar rays, typical of the summer solstice, can cause the blinding phenomenon of photocells. When sunlight hits the receiver directly with an intensity higher than that of the infrared beam emitted by the transmitter, the photocell interprets this condition as an obstacle being present, preventing the automatic closing of the gate. The installer must thoroughly clean the external plastic covers, removing the opaque patina caused by smog and UV rays, and check the perfect optical alignment of the elements. If necessary, one must proceed with the installation of small sunshields or the activation of logical synchronization systems provided by modern VDS control units, which differentiate sunlight from the modulated infrared signal.

Phase 5: Efficiency Analysis of Backup Batteries

Lead-acid batteries suffer heavily from extreme heat, which accelerates the internal chemical process of self-discharge and electrolyte evaporation. A professional check consists of testing the battery voltage during a complete maneuver in the absence of mains power. If a sudden voltage drop below 11V is recorded during the gate’s movement, the battery is to be considered exhausted and must be replaced immediately to guarantee the real efficiency of the backup system in case of need.

Overview of VDS Automazioni Solutions for Residential and Industrial Entrances

The extensive catalog of solutions developed by VDS Automazioni responds with millimetric precision to the challenges posed by summer climatic conditions, covering every automation segment for access points and doors with motors designed, assembled, and fully tested in Italy.

Automation for Sliding Gates: The AG FUTURE and SIMPLY Range

For the movement of sliding gates in residential and light industrial environments, the gearmotors of the SIMPLY series (up to 600 kg) and AG FUTURE series (up to 800–1000 kg) represent excellence in terms of reliability. Available in both classic 230V versions and, above all, in advanced 24V DC models, they incorporate oil-bath gearboxes or gearboxes lubricated with high-performance special greases that do not suffer from thermal liquefaction. The external die-cast aluminum structure, painted with epoxy powders, guarantees optimal thermal dissipation toward the outside, keeping the motor cool even during intensive duty cycles.

Automation for Swing Gates: EGO, PHHEBO, and PM/PM1 Series

Swing gates require impeccable linear force management. The EGO series electromechanical pistons (for leaves up to 3 meters) and the robust PM/PM1 actuators combine exceptional thrust force with millimetric movement precision managed by an encoder. All 24V models allow housing backup batteries directly inside the protective casings or within dedicated control units, ensuring clean aesthetics and total protection against summer electrical surges.

Road Barriers and Traffic Bollards for Intensive Access Control

In parking areas, commercial complexes, and corporate access points, vehicle flows never stop, not even in August. The BERTA road barrier range, with beams up to 6 meters and motorizations strictly at 24V, is designed for continuous 100% intensive use. The adjustable spring balancing system and advanced control logic minimize mechanical and thermal stress. In parallel, VDS traffic bollards offer impenetrable physical protection and exceptional resistance to underground thermal shocks, guaranteeing the lifting and lowering of the metallic cylinders even in conditions of total thermal saturation of the ground.

Automation for Windows, Shutters, and Awnings: Indoor Thermal Comfort and Safety

Automation does not exclusively concern external gates but plays a decisive role also in managing the microclimate inside buildings. VDS produces evolved systems for the automation of motors for roller shutters and motorized awnings, key elements for active solar shading. Automating a sun awning means being able to integrate anemometric (wind) and solar sensors: during the hottest summer days, the awning extends autonomously to protect glass surfaces from direct rays, reducing the internal thermal load and allowing energy savings of up to 30% on air conditioning systems. In the event of a sudden summer storm, the wind sensor provides for retracting the awning in a few seconds, preventing it from breaking.

The range then extends to motors for skylights, domes, and windows (chain or spindle actuators), fundamental for the natural evacuation of stratified heat in the highest points of industrial warehouses and villas. Finally, the motorizations for sectional and up-and-over garage doors of the UTILE series ensure smooth and secure access to the property, integrating rapid release systems and high-efficiency LED courtesy lighting.

Practical Guide to Manual Emergency Release in Total Safety

In the unfortunate event that an obsolete 230V system remains without electrical power during a storm, or should the batteries of a 24V system have exhausted their residual autonomy, the end-user must be able to manually operate the device to allow access to emergency vehicles or their own return home. The release operation must be performed following strict safety criteria to avoid accidents.

1. Preventive Electrical Isolation: Before approaching the automation, if possible, turn off the dedicated magnetothermal circuit breaker in the main household electrical panel to prevent a sudden restoration of mains current from starting the motor during manual handling phases.
2. Use of the Customized Key: Every VDS motor is supplied with a coded metallic release key or an ergonomic customized lever. It is fundamental to keep these keys in a safe and easily accessible place (never leave them inside the car if it is locked outside the gate). Never use pliers, screwdrivers, or improvised tools that would irreparably damage the release cylinder or the plastic handle.
3. Controlled Insertion and Rotation: Insert the key into the appropriate lock located on the gearmotor body. Rotate the key clockwise (or follow the graphic indications printed on the casing) until reaching the mechanical limit switch. Subsequently, open the plastic lever or the access door: this action mechanically disconnects the motor shaft from the transmission gears, rendering the gate leaf free to move in neutral.
4. Manual Movement of the Leaf: Push the gate leaf by acting on the load-bearing structure and never directly on the motor arm or the pinion. The movement must be slow and constant. Exercise maximum caution on swing gates on a slope, as gravity could accelerate the run of the leaf, putting the safety of the operator’s hands at risk.
5. Re-engaging the Automation: To restore automatic operation, bring the leaf back manually a few centimeters until a clear metallic click is heard: this signal indicates that the pinion or the drive carrier has correctly re-engaged with the motor mechanics. Reactivate the electrical switch in the main panel and give a radio command to verify the correct realignment of the electronic limit switches.

Are You a Professional Installer or a Reseller?

Don’t let summer emergencies catch you by surprise. Offer your customers the maximum security of 24V DC systems signed by VDS Automazioni. Contact our sales office today to receive the updated catalog, discover the purchase conditions reserved for you, and participate in our technical training courses focused on advanced maintenance and the protection of installations from extreme atmospheric events.