4P SPD Surge Arrester 20KA 40KA 3 Phase For Three Phase Terminal Cabinets
| 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
|
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.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.