What is a Surge Protective Device (SPD)?
A Surge Protective Device (SPD) is an essential electrical component designed to protect electrical equipment from damage caused by sudden voltage spikes, known as surges. These surges can result from
• Labyrinth arc extinguisher Prevent the spread of arcs in current surges.
• Built-in double row moving contacts Increase the arc voltage.
• Easy to install accessories Realize multiple protections(excitation, auxiliary, alarm etc.)
• Base is made of DMC material VO flame retardant.
• International CertificationTUV、CE、CB.
| Product model | SM8-63 | SM8-125 | SM8-250 | SM8-400 | SM8-630 | SM8-800 | ||
| Model frame rating Maximum rated current (A) | 63 | 125 | 250 | 400 | 630 | 800 | ||
| Rated current (InA) | 10/16/20/25/ 32/40/50/63 |
16/20/25/32/ 40/50/63/80/ 100/125 |
100/125/160/ 180/200/225/ 250 |
225/250/315/ 350/400 |
400/500/630 | 630/700/800 | ||
| Number of Poles | 2/3、4 | 2/3、4 | 2/3、4 | 3/4 | 3/4 | 3/4 | ||
| Rated insulation voltage (UiV) | AC800 | AC1000 | AC1000 | AC1000 | AC1000 | AC1000 | ||
| Rated operating voltage (UeV) | AC400V/AC415V/690V | AC415V/690V | ||||||
| Rated impulse withstand voltage (UimpV) | 8KV | |||||||
| Ultimate short circuit breaking capacity Icu(KA) | 400 | L | 35 | 36 | 36 | 85 | 100 | 100 |
| M | 50 | 55 | 55 | |||||
| H | - | 85 | 85 | |||||
| 690 | H | - | - | - | 20 | 30 | 30 | |
| Running short circuit breaking capacity Icu(KA) | 400 | L | 22 | 27 | 27 | 65 | 75 | 75 |
| M | 35 | 42 | 42 | |||||
| H | - | 63 | 63 | |||||
| 690 | H | - | - | - | 15 | 20 | 20 | |
| Operational performance / time | On Power | 3000 | 2000 | 1000 | ||||
| No Power | 15000 | 10000 | 7000 | |||||
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