Mersen surge arrester STPT12-25K275V-3PM

Manufacturer: Mersen
Designation: Surge arrester type 1+2 25kA Uc 275V
Type: STPT12-25K275V-3PM
Mains form DC: No
Mains form IT: No
Mains form TN: No
Mains form TN-C: Yes
Mains form TN-C-S: No
Mains form TN-S: No
Mains form TT: No
Mains form other: No
Number of poles: 3
Lightning impulse current (10/350 µs): 25 kA
Maximum continuous voltage AC: 275 V
Rated voltage AC: 230 V
Protection level: 1.5 kV
Protection level L-N: 1.5 kV
Protection level L-PE: 1.5 kV
Max. overcurrent protection device V-voltage: 1.5 kV
Overcurrent protection device V-wiring (fuse): 200 A
Mounting type: Top-hat rail TH35
Size: 3 TE
Max. conductor cross-section, rigid (single): 25 mm²
Max. conductor cross-section rigid (solid/multi-stranded): 25 mm²
Max. fuse cross-section flexible (fine-stranded): 25 mm
Max. conductor cross-section flexible (flexible): 35 mm²
Remote signalling: Yes
Signalling on the device: Optical
Test class: Type 1 and 2
Integrated back-up fuse: No
Energy-coordinated protection to the end device: Yes
Voltage-switching spark gap technology: No
Protection class (IP): IP20

Mersen surge arrester STPT12-25K275V-3PM is part of the STP T12 25 range of type 1+2/class I+II combined lightning current and surge arresters, conforming to EN/IEC 61643-11. It is suitable for the first level of protection in the main switchboard and areas located outdoors where installations are usually equipped with an external lightning protection system.