In an electrical systems, Solar DC SPDs are usually installed in tap-off configuration (in parallel) between the live conductors and the earth. The operating principle of Solar DC SPD can be similar to that of a circuit breaker.
In normal use (no overvoltage): the Solar DC SPD is similar to an open circuit breaker.
When there is an overvoltage: the Solar DC SPD becomes active and discharges the lightning current to earth. It can be likened to the closing of a circuit breaker which would short-circuit the electrical network with the earth via the equipotential earthing system and the exposed conductive parts for a very brief instant, limited to the duration of the overvoltage.
For the user, the operation of the Solar DC SPD is totally transparent as it only lasts a tiny fraction of a second.
When the overvoltage has been discharged, the Solar DC SPD automatically returns to its normal state (circuit breaker open).
| DC SPD in Solar Series | YL5-C40-PV | ||
| UCPV (V DC) | 1000V | 1200V | 1500V |
| Max System Discharge Current (8/20 μs) [Imax] | 40kA | 40kA | 40kA |
| Voltage Protection Level [UP] | ≤3.8kV | ≤4.5kV | ≤4.5kV |
| Voltage Protection Level at 5kA [UP] | ≤3.2kV | ≤4.0kV | ≤5.0kV |
| Integrated Fuse Breaking Capacity/Interrupting Rating | 40kA/1000Vdc | 40kA/1200Vdc | 40kA/1500Vdc |
| Technology | Short-Circuit Interruption (SCI) Overcurrent Protection | ||
| Operating Temperature Range [TU] | -40°C to +80°C | ||
| Nominal Discharge Current (8/20 μs) [(DC+/DC-) --> PE] [n] | 20kA | ||
| Response Time [tA] | <25ns | ||
| Operating State/Fault Indication | Green (good)/Red (replace) | ||
| Conductor Ratings and Cross-Sectional Area | Min | 60/75°C 1.5mm2/14AWG Solid/Flexible | |
| Max | 60/75°C 35mm/2AWG Stranded/25mm2/4AWG Flexible | ||
| Mounting | 35mm DIN Rail per EN 60715 | ||
| Enclosure Material | UL 94V0 Thermoplastic | ||
| Degree of Protection | IP20 | ||
| Capacity | 3 Modules, DIN 43880 | ||
| Standards Information | IEC 61643-31 Type 2, IEC 61643-1 Class II | ||
| Product Warranty | Five Years** | ||
