Surge Protection Device To Be Installed in an EV Feeder Pillar?
We at AT Enclosures know how vital reliable power distribution remains for every EV charging project. Outdoor installations face constant exposure. Grid disturbances and lightning strikes create risks that many teams overlook until damage occurs. Our EV feeder pillars serve as the central hub, distributing power safely to multiple charge points. Without proper safeguards, surges can travel straight into sensitive equipment.
Causes of Electrical Surges in Outdoor EV Installations
Outdoor EV sites sit in exposed locations. Lightning strikes nearby induce massive voltage spikes along supply cables. Even distant storms create problems. Utility switching events on the national grid generate transients, as well. Large loads turning on or off suddenly send ripples through the network.
In coastal or rural areas, these events happen more often. Long cable runs from the substation amplify the effect. EV chargers contain delicate electronics which tolerate far less variation than older equipment. Our feeder pillars handle up to 3200 A of low-voltage distribution. Still, the incoming supply remains vulnerable, as voltage transients travel quickly, bypassing basic fuses and reaching the chargers downstream.
Type 1 vs Type 2 Surge Protection Devices Explained
Surge protection devices come in distinct categories. Type 1 units handle direct lightning currents. They manage the powerful 10/350 microsecond waveform. Installers place them at the main intake point. Type 2 devices address indirect surges, coping with the faster 8/20 microsecond events from switching or induced strikes. These sit further down the line.
Many modern applications now use combined Type 1+2 modules. They offer layered defence in one compact unit. Our EV feeder pillars support DIN rail mounting, which makes either type easy to integrate. We work with user-supplied switchgear. The design ensures compliance with BS EN 61439-2 throughout.
When Surge Protection Should Be Installed Inside a Feeder Pillar
Not every site needs internal surge protection, and yet most outdoor EV projects benefit greatly. Locations within lightning-prone zones require it immediately. Installations with cable runs longer than 50 metres face a higher risk. Public car parks and fleet depots operate around the clock, so the downtime here costs money fast.
BS 7671 guidance highlights surge protection for critical infrastructure. Our feeder pillars already include circuit protection against overcurrent and residual current. Adding surge devices completes the picture. We recommend them whenever the site serves multiple rapid or ultra-rapid chargers. The feeder pillar sits at the perfect point. It protects every outgoing way before power reaches the charge points.
Consequences of Not Installing Surge Protection
A single transient can destroy charger internals. Charging bays stay offline for days or weeks. Fleet operators lose valuable uptime. Public sites suffer reputational damage when drivers cannot charge.
In the worst cases, surges create fire hazards. Sensitive electronics fail without warning, which further complicates insurance claims. Our experience shows that early protection prevents these issues. The cost of adding devices during manufacture is modest. Retrofits are far more expensive and disruptive. Many projects learn this lesson after the first storm season.
Protection strategies for long-term EV infrastructure reliability
Long-term reliability needs more than basic enclosures. We at AT Enclosures build every EV feeder pillar to withstand UK conditions. We select materials carefully. Mild steel works inland. Stainless steel guards against corrosion near the sea. Full in-house fabrication ensures precision.
We support pre-wired options where required, which increases the speed of site work and reduces errors. For surge protection, we leave ample room and mounting points. Teams simply fit their chosen devices. The result is a complete, future-proof hub, which keeps power flowing safely to every charge point.
Surge events will continue because grid demands grow with more EVs on the road. Choosing the right feeder pillar makes the difference. Our designs deliver the strength and flexibility needed. They protect your investment year after year.
Consider integrating surge protection devices inside your next EV feeder pillar. The benefits appear clear from day one. Reliable charging infrastructure starts with thoughtful engineering at the distribution point. We stand ready to support projects that demand exactly that level of performance. Contact us today.