NPS02-F40 AC 3+1P Surge Protective Device

Product Overview

Engineered specifically for low-voltage three-phase installations with isolated neutral configurations, our NPS02-F40 AC 3+1P Surge Protective Device provides comprehensive Class II transient protection in a 3P+NPE layout. Equipped with three high-energy varistors across the phase lines and a high-discharge spark gap on the neutral-to-earth path, this NPS02-F40 AC 3+1P Surge Protective Device delivers 40kA total discharge capacity while eliminating earth leakage currents. Our factory manufactures this device to safeguard commercial office distribution panels, industrial workshop switchboards, and hospital auxiliary power boards against utility grid switching surges and indirect lightning strikes.

Application Scenarios

Commercial Building Distribution: Three-phase TT and TN-S main distribution boards, floor tenant panels, and HVAC chillers.
Healthcare & Public Facilities: Hospital auxiliary power boards, airport terminal lighting panels, and university laboratories.
Manufacturing Facilities: Three-phase sub-distribution panels, assembly line power feeds, and motor drive cabinets.

Technical Specifications

Parameter	Specification
Model	NPS02-F40 AC 3+1P
Operating Voltage (Uc)	275V, 320V, 385V, 440V (Selectable Options)
Nominal Discharge Current (In, 8/20μs)	20kA
Maximum Discharge Current (Imax, 8/20μs)	40kA
Configuration	3+1P (Three Phase MOVs + Neutral-Earth Spark Gap)
Mounting Base	35mm Standard DIN Rail (EN 50022)
Status Indication	Visual Mechanical Flags (Green: OK / Red: Fault)

OEM & Manufacturing Strength

Extensive Scale: Our facility houses automated assembly, wave soldering, and testing lines delivering over 50,000 units monthly.
Global Brand Collaboration: Trusted manufacturing partner for leading electrical brands including Phoenix Contact, TBEA, and NR Electric.
Private Label Customization: Silk-screen branding, customer part numbers, and custom packaging available from 100 sets.

Quality Control

In-House Impulse Testing: Validated on our 200kA lightning impulse generator across standard 8/20μs waveforms.
Thermal Runaway Prevention: Tested under continuous elevated operating voltages to ensure zero thermal runaway risk.
International Standards: Conforms to IEC/EN 61643-11 standards, holding valid CE, TUV, and SGS RoHS certifications.

Product Advantages

FAQ

Q1: Why is the 3+1P configuration required in three-phase TT electrical systems?

A1: In TT systems, an MOV connected directly to Earth could cause persistent leakage and trip RCDs; the 3+1P gas discharge tube prevents earth leakage.

Q2: What are your standard payment terms for volume commercial orders?

A2: Standard terms are a 50% deposit upon order confirmation, with the remaining 50% balance cleared prior to factory dispatch.