Glycol and transformer oil on the yard, seen in seconds

The thermal management system on each enclosure moves coolant through hoses, quick-connects and a pump to a chiller unit on the end wall. A coupling weeps, a hose chafes on a bracket, a drain valve is left cracked after service, and the coolant runs down the end wall onto the pad. Bright glycol on concrete is easy to see when someone is there; nobody is. V4 runs on the yard cameras that already watch the rows, with an interest zone on the pad along the chiller ends and an exclusion zone on the enclosures. The puddle is reported as it appears, posts into the VMS, and reaches the site SCADA as a Sparkplug B tag beside the enclosure's own alarms.

A liquid-cooled PCS or central inverter has its own coolant loop and its own radiator, and the skid sits on a pad with a transformer beside it. A leak here shows as coolant at the skid base or oil at the transformer base, and the pad is visited when something trips. The same yard camera, or a PTZ with a preset on each pad, gives V4 a view of the skid base and the transformer pad together. The alarm reaches the O&M provider by webhook with the original and overlay snapshots, so the dispatcher knows what the truck is going to find.

Every block's MV transformer and the site's main transformer hold mineral oil, and they leak at the same places any transformer does: radiator welds and valves, bushing gaskets, drain valves. The substation is fenced, remote and walked on the O&M schedule, and the gravel hides the weep until it is large. V4 watches the base of each unit from the substation cameras, with an exclusion zone on the tank and the radiators, and the rain gate holds the alarm while it rains. The alarm lands in the VMS and the site SCADA over MQTT, and the containment pit, where there is one, gets its own interest zone.

The gearbox, the hydraulic pitch and brake systems and the yaw drives in the nacelle all hold oil, and when a seal or a hose fails the oil runs down the inside of the tower and out at the base, or down the outside of the tower to the pad. From the ground the sign is a streak on the tower and a dark patch at the door. V4 runs on a camera on the pad or the met mast looking at the base and reports the puddle at the door and the streak as it reaches the ground. The alarm reaches the wind farm SCADA over MQTT and the O&M crew by SMS.