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40kA 3P+N Surge Protectors SPD
LYD4 series surge protective device is suitable used in the IT, TT, TN-C, TN-S, TN-C-S and power supply system of AC 50/60Hz, rated voltage up to 380V, to protect from direct and indirect lightning impulse and other transient over voltage. SPD is incompliance with IEC 61643-1 standards.
To be mounted in joint of LPZ1 or LPZ2 zone adopts 35mm standard mounting rail. The cross sectional area of multi-standard soft copper conductor 2.5 to 35 mm2.
Every poles of SPD shall be protected by fuse or mini circuit breaker.
Operation elements:
SPD as only one side of terminals, able to prevent from being electric touching, indoor fixedly mounted, limiting voltage.
SPD has built-in disconnector, when SPD is invalid duo to overheating or breakdown, the disconnector can automatically separate SPD from the network, meanwhile send an indication signal. The visible window show white color in normal service, if to be separated from network, it will show red color.
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Fast response time, low residual voltage.
SPD can provide the NO contact for remote communication, if one or more modules of SPD is invalid, the NO and NC contact will be closed and send fault information.
Technical parameter
Model and specification |
LYD4-20 |
LYD4-40 |
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Maxi continuous operating voltage Uc(VAC) |
420 |
275 |
420 |
275 |
Voltage protective level(kV)≤ |
1.8 |
1.2 |
2.0 |
1.5 |
Maxi discharge current Imax(kA) (8/20µs) |
20 |
40 |
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Normal discharge current Imax(kA) (8/20µs) |
10 |
20 |
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Response time (ns) |
<25 |
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Protection grade |
IP20 |
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Indication of invalidation |
Aging invalidation: white is normal and red is invalidation |
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Application |
Primary protection for in line |
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Remote signal function |
Remote signal function can select. |
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Remarks |
Maxi continuous operating voltage can be customized. |
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