Pure Type 1 15kA Three-Pole Lightning Protection for Three-Phase Systems

Product Overview

NPS01-FA15 AC 3P Surge Protective Device is a pure spark gap Type 1 (Class I) SPD designed for three-phase three-wire power distribution systems.

Compliant with EN/IEC 61643-11 and GB/T 18802.11 standards, the device adopts independent graphite spark gaps for L1/L2/L3 phases with Iimp 15kA (10/350μs) lightning impulse protection capability.

It provides direct lightning current discharge protection and is suitable for primary protection at the incoming end of industrial three-phase systems.

The product adopts an 81mm modular design, supports 35mm DIN rail installation, and covers Uc voltage levels from 275V to 385V.

Independent Three-Pole Graphite Spark Gap Design

Each phase uses high-purity graphite spark gap technology, providing stable discharge performance, strong surge withstand capability, and excellent follow current interruption.

The independent three-pole structure prevents single-pole failure from affecting other phases. High-purity copper conductors and large terminals ensure low resistance and high current capacity.

The enclosure uses UL94V-0 flame-retardant material with IP20 protection rating for industrial safety requirements.

200A Backup Fuse Compatible for Industrial Applications

Specifications:

Nominal discharge current In: 15kA (8/20μs)
Protection level Up: 1.5kV
Response time ≤100ns
Recommended backup fuse: 200A gG
Cable size: 4-35mm²

Equipped with thermal disconnection and visual status indication. Optional remote alarm contacts support connection to monitoring systems such as SCADA.

Suitable for industrial power distribution, photovoltaic systems, and three-phase high-current applications.

Model	NPS01-FA15/275/3	NPS01-FA15/320/3	NPS01-FA15/385/3
SPD Test Category	Type1/ClassI (EN/IEC61643-11, GB/T18802.11)
Maximum Continuous Operating Voltage Uc (Current Type: a.c.)	275V	320V	385V
Lightning Impulse Current (10/350μs) [L-PE, N-PE] Iimp	15kA	15kA	15kA
Nominal Discharge Current (8/20μs) [L-PE, N-PE] In	15kA
Maximum Discharge Current (8/20μs) [L-PE, N-PE] Imax	1.5kV	1.5kV	1.5kV
Voltage Protection Level [L-PE, N-PE] Up	≤100ns
Response Time	200A gG Fuse
Backup Fuse	Normally Open and Normally Closed Contact Terminals
Remote Signal Alarm	AC: 250V/0.5A, 125V/1A; DC: 30V/0.1A
Remote Alarm Signal Energy Un/In	0.5mm² to 1.5mm²
Remote Alarm Signal Connection Wire	Floating Changeover Contact
Remote Contact Type	-40℃ to +80℃; 5%~95%
Temperature and Humidity Range	Red: Failed; Green: Normal
Disconnector Operation Indicator	4mm² Solid Wire / Flexible Wire
Minimum Installation Conductor Cross-Section Area (L, N, PE)	35mm² Standard Wire / 25mm² Flexible Wire
Maximum Installation Conductor Cross-Section Area (L, N, PE)	35mm Standard DIN Rail
Installation Method	Red Thermoplastic Material, UL94V-0
Enclosure Material	IP20
Enclosure Protection Degree	W×L×H: 81×91×66mm
Note: The above products can be optionally equipped with a remote signaling function. Products with remote signaling will have "/FM" added after the original model number, such as NPS01-FBC7/275/1/FM.