Generator disconnection: firefighter switch for Kessler in Abtsgmünd
Generator disconnection: firefighter switch for Kessler in Abtsgmünd
On our production halls in Abtsgmünd, we generate around 13.8 GWh of electrical energy per year on approx. 124,000 m² of roof area with 31,000 solar modules. Of this, around 55% of the electricity generated on site flows directly into our own production. With the electricity fed into the grid beyond that, we contribute to a climate-neutral energy supply in the region. On sunny Sundays, the system has to be curtailed because the capacity of the public grid limits feed-in.
Even before construction began, it was clear that safety would be the focus of this PV power plant. To minimise risks such as fires or overvoltage damage, shutdown devices had to be installed. Switching 11 MWp in an emergency involves certain risks. The choice quickly fell on Q3 ENERGIE because they impressed with quality and functionality. However, the standard firefighter switches could not be used. Q3 developed the “Big-Box” in a metal enclosure specifically to meet our requirements. A total of 80 of these firefighter switches disconnect the DC generator from the inverter with a time delay when triggered, in order to minimise voltage dips. As a “lighthouse project”, our PV system could have a signalling effect in the region.
David Schürle, Kessler + Co. GmbH + Co. KG
Firefighter switch
PV fire protection
QFire BIG
| Project data | |
|---|---|
| Application | PV fire protection |
| Location | Kessler, Abtsgmünd |
| Technology | QFire BIG firefighter switch |
| Special features | ■ Integrated delay circuit ■ Integrated overvoltage protection T1+2 ■ Sheet-steel enclosure for industrial environments |
