Quality 4P SPD Surge Arrester 20KA 40KA 3 Phase For Three Phase Terminal Cabinets factory

4P SPD Surge Arrester 20KA 40KA 3 Phase For Three Phase Terminal Cabinets

Name: 4P SPD Surge Arrester 20KA 40KA 3 Phase For Three Phase Terminal Cabinets
Brand: Shenzhen LLH Electrical Co., Ltd.
SKU: LPM 80-385/3+NPE
Availability: InStock

Product Summary

Product Custom Attributes

Protection Topology:

L1/L2/L3-N + Separate N-E Circuit

Available Uc Ratings:

320Vac, 385Vac Dual Options

Cable Compatibility:

2.5mm² ~ 32mm² Copper Wires

Humidity Resistance:

≤95%RH At 40℃

Overall Dimension:

Standard 90×72×68mm

Highlight:

4P SPD surge arrester 20KA

3 phase surge arrester 40KA

T2 SPD for terminal cabinets

Basic Properties

Place of Origin:

China

Brand Name:

LLH

Model Number:

LPM 80-385/3+NPE

Document:

SLV 20-385(3+NPE).pdf

Trading Properties

Minimum Order Quantity:

1 piece

Packaging Details:

Box

Delivery Time:

7-15 days

Payment Terms:

L/C,D/A,D/P,T/T,Western Union

Supply Ability:

5000-10000 pieces/mouth

Tags:

3+NPE topology surge arrester built for three-phase five-wire TN-S and TT power systems, with separated phase-earth and neutral-earth discharge paths to avoid unbalanced neutral current issues seen on standard 4P SPDs. Classified as combined T2+T3 fine protection for LPZ1-LPZ2 terminal panels, carrying 20kA nominal and 40kA max surge capacity to withstand repeated lightning impulses. Vibration-proof pluggable modules fit continuously vibrating production cabinets, front visual window indicates module degradation, while remote contacts integrate with SCADA and building BA systems. Wide cable range supports high-power terminal circuits with consistent residual voltage clamping from -40℃ to +80℃.

Product features

● Balanced surge diversion via 3-phase plus independent NPE dual paths

● Dual Uc variants matching international three-phase mains grids.

● Extra wide wiring range for heavy-duty power conductors

● Passive dual alarm contacts for unattended electrical room monitoring.

● Consistent operation in damp enclosed distribution enclosures.

● Suitable for installation in LPZ 1 -2 and subsequent lightning protection zones , it is used as a fine lightning arrester for three-phase power supply systems .

Specification

4P SPD Surge Arrester 20KA 40KA 3 Phase For Three Phase Terminal Cabinets 0

Based on criteria	GB/T 18802.11-2020
SPD type	T2,T3
SPD model	SLV 20-385/3+NPE	SLV 20-320/3+NPE
Electrical parameters
Nominal operating voltage Un	220Vac(50Hz)
Maximum continuous operating voltage Uc	385Vac(50Hz)	320Vac(50Hz)
Nominal discharge current (8/20μs)In	20kA	20kA
Maximum discharge current (8/20μs)Imax	40kA	40kA
Voltage protection level In@Up	L-N:≤1 .3kV N-E:≤1 .5kV	L-N:≤1 .0kV N-E:≤1 .5kV
L 123-N(3kA&6kV) Uoc	≤600V	≤800V
Response time tA	L-N:≤25ns N-E:≤100ns
Protected mode	L1,L2,L3-N,N-E
Mechanical parameters
Way to install	DIN 35mm guide rail
Screw torque	5 N*m
Strand length	12mm
Wiring cross-sectional area	2.5mm²-32mm²
Product size	90mmx72mmx68mm
Shell Material and Flame Retardant Rating	Mineral nylon PA6 ,V0
Warning system
Degradation indicator	Green window: OK; red window: Fail
Remote communication contact type	Normally closed , normally open switching contact
Remote communication contact switching capability	125Vac/1A,125Vdc/0 .2A
Work environment
Installation site	Indoor
Outer shell protection rating	IP20
Temperature range	-40℃…+80℃
Humidity range	Relative humidity ≤95% (max 40°C)

FAQ

Q1: What is the core difference between 3+NPE and 4P SPD?

A: 4P units share a common neutral path; 3+NPE adds dedicated N-E discharge channel for more balanced neutral surge flow, ideal for sensitive terminal loads.

Q2: Can this topology be used on TN-C-S distribution networks?

A: Yes, follow standard grounding wiring for separated PE branches.

Q3: Can multiple arresters be wired in parallel on one alarm circuit?

A: Dry contacts can be paralleled via relays for unified central monitoring signals.

Attachments

PDF

SLV 20-385(3+NPE).pdf

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