T2 T3 Combined Surge Protection Device Three Phase 20KA 40KA SPD
Product Summary
Dual-function combined SPD integrating Type 2 high-current diversion and Type 3 precise voltage clamping, installed at LPZ1-LPZ2 terminal zones and coordinated with front Type 1 arresters for staged surge suppression. 25ns nanosecond phase response instantly blocks grid switching voltage spikes, two ...
Product Custom Attributes
T2 T3 combined surge protector
,three phase SPD 20KA
,40KA surge protection device
Basic Properties
Trading Properties
Product Description
| Product features |
| ● Single module integrates T2 surge diversion & T3 low residual clamping. |
| ● Compatible with full LPZ0B~LPZ2 multi-stage lightning protection chains. |
| ● ≤25ns phase response suppresses microsecond voltage transients. |
| ● Unchanged combined protection performance at 80℃ peak temperature. |
| ● V0 flame retardant housing improves cabinet fire safety rating. |
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● 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
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Based on criteria |
GB/T 18802.11-2020 |
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SPD type |
T2,T3 |
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SPD model |
SLV 20-385/3+NPE |
SLV 20-320/3+NPE |
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Electrical parameters |
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Nominal operating voltage Un |
220Vac(50Hz) |
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Maximum continuous operating voltage Uc |
385Vac(50Hz) |
320Vac(50Hz) |
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Nominal discharge current (8/20μs)In |
20kA |
20kA |
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Maximum discharge current (8/20μs)Imax |
40kA |
40kA |
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Voltage protection level In@Up |
L-N:≤1 .3kV N-E:≤1 .5kV |
L-N:≤1 .0kV N-E:≤1 .5kV |
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L 123-N(3kA&6kV) Uoc |
≤600V |
≤800V |
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Response time tA |
L-N:≤25ns N-E:≤100ns |
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Protected mode |
L1,L2,L3-N,N-E |
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Mechanical parameters |
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Way to install |
DIN 35mm guide rail |
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Screw torque |
5 N*m |
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Strand length |
12mm |
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Wiring cross-sectional area |
2.5mm²-32mm² |
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Product size |
90mmx72mmx68mm |
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Shell Material and Flame Retardant Rating |
Mineral nylon PA6 ,V0 |
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Warning system |
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Degradation indicator |
Green window: OK; red window: Fail |
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Remote communication contact type |
Normally closed , normally open switching contact |
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Remote communication contact switching capability |
125Vac/1A,125Vdc/0 .2A |
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Work environment |
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Installation site |
Indoor |
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Outer shell protection rating |
IP20 |
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Temperature range |
-40℃…+80℃ |
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Humidity range |
Relative humidity ≤95% (max 40°C) |
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FAQ
Q1: Can T2+T3 combined SPD work without front Type 1 arrester?
A: It serves only as terminal fine protection; full lightning coordination still requires LPZ0B primary Type 1 devices.
Q2: Does the Uoc difference between two Uc models affect selection?
A: 385Vac units feature lower Uoc ≤600V for grids with wider voltage fluctuation.
Q3: What damage occurs from over-tightening terminals beyond 5N·m?
A: Excessive torque deforms cable terminals and damages internal conductive components inside modules.
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