HD-PMT2 is a Class II lightning surge protector applied to the main distribution system. It has the advantages of strong lightning withstand capability up to 40KA (Imax), low voltage protection level (≤1.7KV), leakage current less than 10uA, and intermittent flow capability (25KA). With integrated base and pluggable chip structure, there are 2P, 4P combination, suitable for TT/TN grid type. It is the best choice for distributing secondary lightning protection at the cabinet and secondary switch.
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Model
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HD-PMT2-40/385
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HD-PMT2-20/385
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Number of modules
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4P/2P
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4P/2P
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Suitable power grid type
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TT/TN-S/TN-C-S
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TT/TN-S/TN-C-S
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Nominal voltage Un
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220/380V
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220V/380V
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Maximum continuous working voltage Uc
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385V
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385V
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Voltage protection level Up
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1.7KV
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1.6KV
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Nominal discharging current In
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20KA
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10KA
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Maximun discharging current Imax
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40KA
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20KA
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Response time Ta
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25ns
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25ns
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Pre-fuse
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32A
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16A
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Leakage current
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10uA
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Connecting wire diameter
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6mm2
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Fault indication
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Yes
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Operating temperature
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-40℃~+70℃
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Humidity
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≤95%
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Altitude
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≤2000m
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Protection degree
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IP20
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Flame retardant level
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V0
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Installation
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Clip on 35mm electrical guideway
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Protection mode
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L/N-PE，L-N-PE
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3L/N-PE，3L-N-PE
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External dimension
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72*90*65mm/36*90*65mm
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Ground the null line repeatedly when Long-distance overhead incoming lines enter buildings.
Plug the power phase line (L) and null line (N）into corresponding connector of the electric surge protector and make sure it's firm and reliable. Connect the ground terminal of arrester with the ground lead of lightning protection well (recommended earth resistance ≤4Ω).
Suggested specification of the lead wire: no less than 6mm2, short and straight.
