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Three Phase AC SPD 275V 8ka 25ka 50ka AC T1+ T2 3p+N Surge Protective Device Low Voltage Surge Arrester
Product Description
⭐ Basic Information
📦 Product Description
Summary: BT P BCM 275 RM/3+N is for installation at LPZ 0A-2 or higher. It protects low voltage devices from surge damages, specifically designed for TT/TN-S systems ("3+1" circuit). Applied in SPD Class I+II (Class B+C) for three-phase systems of lightning current surge protection. Designed according to IEC 61643-11; EN 61643-11; GB/T 18802.11.
Main Characters
- Three-phase protection for TT/TN-S system ("3+1" circuit)
- High discharge capacity, quick response, pluggable design
- Max. lightning discharge current up to 8kA 10/350 (L-N)
- Double thermal disconnection devices for reliable protection
- Green visual indicator changes when fault occurs
- Remote alarm control terminal available
Application environment:
Temperature: -40°C ~ +80°C
Relative humidity: ≤ 95% (25°C)
🛠️ Installation Instruction
This surge protective device is usually installed in distribution boxes or feeder buses of UPS, protecting devices downstream. Fuses must be installed upstream to ensure the system has double protection. The value of the fuse should be as large as possible to allow the maximum surge discharge of the SPD while maintaining safety.
📊 Technical Data
| Parameter | Symbol | Value |
|---|---|---|
| Nominal a.c. voltage | UN | 230V/400V |
| System frequency | Hz | 50/60Hz |
| Rated voltage (max. continuous) | Uc | 275V~(L-N); 255V~(N-PE) |
| Total lightning impulse current (10/350µs) | Iimp | 32kA(L+N-PE) |
| Nominal discharge current (8/20µs) | In | 25kA(L-N); 40kA(N-PE) |
| Max. discharge current (8/20µs) | Imax | 50kA(L-N); 65kA(N-PE) |
| Voltage protection level | Up | ≤1.5kV |
| Response time | tA | ≤25ns(L-N); ≤100ns(N-PE) |
| Enclosure material | - | Thermoplastic, UL94-V0 |
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