Product Description：
Adopting Class Ⅱ SPD to combine “3+1” circuit, protecting low voltage equipment from surge damages,  applied in TT system, designed according to IEC61643-1/GB 18802.1

Main character：
1. Green light indicates normal and red light indicates fault for operation
2.  Built-in circuit breaker, and thermal disconnection device, when the fault occurred, the thermal disconnection device will cut off the SPD from the power net, the green window will change
3. Impulse counter function, recording the lightning events
4. External wiring terminal, easy for connection, suitable foe indoor application

Parameters：
Type: BT 5L CM 275/40 3+1
Order No.: 840 884
Rated voltage (max. continuous a.c voltage) L/N Uc: 275V
Rated voltage (max. continuous a.c voltage) N/PE Uc: 255V
Nominal discharge current (8/20) L/N In: 20KA
Nominal discharge current (8/20) N/PE In: 40KA
Max. discharge current (8/20) L/N Imax: 40KA
Max. discharge current (8/20) N/PE Imax: 65KA
Voltage protection level L/N Up: ≤1.25KV
Voltage protection level N/PE Up: ≤1.5KV
Follow current extinguishing capability at Uc (N/E) 100Arms
Operating temperature range: -40℃…+80℃
Cross-sectional area: 25mm2 solid/35mm2 flexible
Enclosure material: black metal housing (die-casting Aluminum)
Test standards: YD/T 1235.1; GB 18802.1; IEC 61643-1
Certification: CE (LVD, EMC)