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Surge protection device for electrical panel KYSPD-12.5T1+T2-3P+1 | Kuangya
Three-phase surge protection device for electrical panel in 3+1 topology (L-N + N-PE) for TT / TN-S networks at 230/400 V AC.
Surge ratings (L-N / N-PE): Iimp 12.5 kA / 50 kA (10/350 µs), In 20 kA / 50 kA (8/20 µs), Imax 50 kA / 100 kA (8/20 µs); typical Up options from 1.0/1.5 kV up to 2.0/1.5 kV by variant.
Pluggable modules, thermal disconnector with green/red status, optional RC remote contacts; IP20 housing, UL94-V0 thermoplastic, 35 mm DIN-rail mount.
using a 3+1 topology (L–N + N–PE) for TT and TN-S systems at 230/400 V AC. It combines Type 1
lightning current handling on the N–PE path with Type 2 surge discharge on each L–N path to
protect downstream equipment in main distribution boards.This surge protection device for electrical panel features pluggable cartridges with
thermal disconnection and a clear green/red status window. Optional RC remote contacts enable
fault signaling to BMS/PLC. The compact DIN-rail form factor simplifies integration into
electrical panels for industrial, commercial, and large residential sites.
Key Features
- 3+1 coordinated protection for TT / TN-S networks (L–N MOV, N–PE GDT+MOV).
- Surge capability (L–N / N–PE): Iimp 12.5 kA / 50 kA (10/350 μs); In 20 kA / 50 kA;
Imax 50 kA / 100 kA (8/20 μs). - Voltage protection levels (Up) available from 1.0/1.5 kV up to 2.0/1.5 kV depending on Uc.
- Follow current interrupt rating (N–PE) 100 A RMS; fast response < 25 ns / < 100 ns (L–N / N–PE).
- Pluggable, serviceable modules with green (OK) / red (fault) indicator.
- Optional RC remote contacts; AC 250 V / 0.5 A, DC 250 V / 0.1 A, 125 V / 0.2 A, 75 V / 0.5 A.
- Housing IP20, thermoplastic UL94 V-0; 35 mm DIN rail (EN 60715) mounting.
- Compliant with IEC/EN 61643-11.
Specifications
| Product Code | KYSPD-12.5T1+2-3+1 |
|---|---|
| Category | Surge protection device for electrical panel |
| Nominal System Voltage (Uo/Un) | 230/400 V AC |
| Network / Topology | TT, TN-S / 3+1 (L-N + N-PE) |
| Max. Continuous Operating Voltage (Uc) | (L-N) 150/275/320/385/440 V; (N-PE) 255 V |
| Nominal Discharge Current (In, 8/20 μs) | (L-N / N-PE) 20 kA / 50 kA |
| Maximum Discharge Current (Imax, 8/20 μs) | (L-N / N-PE) 50 kA / 100 kA |
| Impulse Discharge Current (Iimp, 10/350 μs) | (L-N / N-PE) 12.5 kA / 50 kA |
| Voltage Protection Level (Up) | 1.0/1.5 kV, 1.5/1.5 kV, 1.6/1.5 kV, 1.8/1.5 kV, 2.0/1.5 kV |
| Follow Current Interrupt Rating (Ifi) | 100 A RMS (N-PE) |
| Response Time | < 25 ns / < 100 ns (L-N / N-PE) |
| Backup Fuse (max) | 160 A gL/gG |
| ISCCR | 25 kA AC |
| Operating Temperature | -40 °C to +70 °C |
| Mounting | 35 mm DIN rail (EN 60715) |
| Enclosure / Protection | Thermoplastic UL94 V-0 / IP20 |
| Remote Signaling (RC) | Optional; AC 250 V / 0.5 A; DC 250 V / 0.1 A; 125 V / 0.2 A; 75 V / 0.5 A |
| Standards | IEC/EN 61643-11 |
Wiring & Dimensions
Connection diagram surge protection device for electrical panel 3+1
Dimensions surge protection device for electrical panel 3+1
Applications
- Main distribution boards in electrical panels for industrial & commercial buildings.
- Service-entrance coordination where a surge protection device for electrical panel must handle lightning current on N-PE and surges on L-N.
- Retrofits requiring pluggable maintenance with RC alarm integration to BMS/PLC.
FAQ
- Where should this device be installed? At the main distribution board of TT / TN-S electrical panels using a 3+1 configuration.
- What surge currents can it handle? (L-N / N-PE) Iimp 12.5/50 kA, In 20/50 kA, Imax 50/100 kA.
- Does it support remote signaling? Yes, optional RC contacts are available.
- Is it suitable for residential or industrial use? Both; it supports residential, commercial, and industrial TN-S boards.
- Which standards does it comply with? IEC/EN 61643-11.
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