T2 T3 Combined Surge Protection Device Three Phase 20KA 40KA SPD
| 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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