Class III / Type 3
Two-Port Surge Filter
Prosurge’s surge filter is used to protect single/three phase electrical distribution systems, especially to protect sensitive electronics
against the harmful effects of transient surges. Surge protective device especially for low-voltage power supply system surge protection
at the boundaries from lightning protection zone 2-3 and higher.
It’s found that electronic equipment is sensitive to both the absolute magnitude of the impulse voltage and its rise rate.
The radical changes in dv/dt and di/dt, rather than the peak voltage, is the major source of electronic circuit damages.
Prosurge’s surge filterProsurge’s surge filter is designed as a 3-stage protection system which consists of primary protection & secondary protection with a well-designed LC filter in series. The LC filter is used to slow down the inherently fast rise rate of voltage and current.
The primary protection module is used to divert the strong lightning/surge current, while the secondary protection module & LC filter
will limit the let-through voltage to a very low level. The surge filter should be installed in series with the supply powering the equipment.
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Surge filter Models
DSF25/320-25A 3P/C-S
Surge protective device especially for low-voltage power supply system surge protection at the boundaries from lightning protection zone 2-3 and higher.
Class III (class D) surge protector in accordance
Series type SPD/surge power filter, rated load current 25A
Single phase surge protection
High energy MOV (Metal Oxide Varistor) inside
Interference suppressor filter >45dB @ 1MHz
Low voltage protection level
Failure indication by LED
Failure indication by LED
with IEC61643-11 and UL1449-4th

DSF10/320-10A 3P/C
Surge protective device especially for low-voltage power supply system surge protection at the boundaries from lightning protection zone 2-3 and higher.
10Amax discharge current 20kA 8/20 per phase