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powerware dsfi

DSFi Series - Dual Stage Surge Filter dsfi_bg

The DSFi provides secondary protection against power surges caused by external sources such as lightning strikes and substation switching as well as providing protection from surge events generated on the secondary side of the filter. Its 3-stage protection unit utilises primary and secondary MOV protection in conjunction with a Low-Q LC filter. In addition, the unit also provide filtering of the line harmonics, noise and RF transmitters.

Product Highlights


Surge suppression and filtering in a single package


Modular design


Enclosed in IP24 steel enclosure


Remote alarm contacts standard

3 mode protection

5 Year Warranty





DSFi Series - Dual Stage Surge Filter 

Technical Specifications






Input voltage

200-250VAC 1phase

Service type

TT, TN, TN C-S or any single-phase system with a grounded neutral.

Energy Absorption rating -per mode (Joules)

L-N = 740 Joules, N-E = 780 Joules, Aggregate rating = 2110 JoulesPrimary Protection L-N =740 J
Primary common mode protection L-E &N-E =780 J
Secondary protection L-N =225J
Secondary common mode protection L-E &N-E =480J
Aggregate rating =2,225J

Current rating – continuous

5 - 32A

Recommended max. over current protection

32A (C curve MCCB)

Short circuit withstand (1 sec)

Suitable for use with a 6kAIC C Curve MCB

Protection modes

Line-Neutral, Line-Earth, Neutral-Earth

In 8/20us (Line-Neutral)

15kA x 20 hits

In 8/20us (Line-Earth)

10kA x 20 hits

In 8/20us (Neutral-Earth)

10kA x 20 hits

Ismax 8/20us (Line-Neutral)


Ismax 8/20us (Line-Earth)


Ismax 8/20us (Neutral-Earth)


Filter attenuation

> 80dB to 10MHz

Internal protection (fusing)



10mm2 PCB Mounted Terminals


2 LED display,Power OK &Protection OK LEDs,Dry contact alarm relay output – 250Vac//32Vdc,5A,5kV isolation, Alarm under-voltage cutoff 180Vac

Enclosure rating


Design Standards:

IEC61643-1, IEC610006-1,2,3,4 ANSI/IEEE C62.41 Cat B,C,D,E AS1768-1991 Cat B,C,D,E AS3000,AS3100, CE mark




C, 10 to 90%RH (non-condensing)°-10 to 65


Price $565.00 inc gst ,  plus delivery


Does not include installation