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Fault Fiter Electronic Power Fuses are a major advancement in circuit-interruption technology. They integrate state-of-the-art electronics with an advanced-design high-continuous-current fuse. The electronics provide current sensing, time-current characteristics, and control power. No remote relaying or external power is required. Fault Fiter provides unsurpassed high-speed interruption of fault currents to 40,000 amperes RMS symmetrical. Fault Fiters are maintenance-free, maintenance-proof.

S&C’s Fault Fiter Electronic Power Fuses are manufactured in accordance with a quality system certified to ISO9001:2000.

Fault Fiter Electronic Power Fuses offer superior coordination with source-side overcurrent relays and load-side feeder fuses. They offer unmatched high-speed circuit-interrupting performance without producing excessive voltage surges, and they respond more quickly to high-current faults than conventional fuses. They’re ideal for:

  • Service-entrance protection and coordination,
  • Transformer protection,
  • Underground subloop protection, and
  • Overdutied device protection.

Fault Fiter Electronic Power Fuses are available with Uni-Rupter®, which provides 400-ampere single-pole live switching of single-phase and three-phase circuits rated 13.8 kV, and 200-ampere single-pole live switching of circuits rated 25 kV. Uni-Rupter offers the ultimate in live-switching simplicity: a firm, steady opening pull on the fuse with a hookstick is all that is required for circuit interruption. Since circuit interruption is internal to Uni-Rupter, there’s no external arc or flame.

Fault Fiter Electronic Power Fuses are offered in S&C Custom Metal-Enclosed Switchgear, S&C PME Pad-Mounted Gear, S&C PMH Pad-Mounted Gear, and wall-mounted S&C Metal-Enclosed Fuses.

(On mobile, swipe left for remaining ratings information.)

StylekVAmperes, RMS
Nom.MaxBILCont.Load DroppingInterrupting, Sym.
60 Hz50 Hz
Disconnect with Uni-Rupter 13.8
25
17.0
29
95
125
400
200
400
200
14 000
12 500
11 200
10 000
Disconnect 4.16
13.8
25
5.5
17.0
29
60
95
125
600
600
600


40 000
40 000
40 000
40 000
40 000
40 000

Fault Interruption — How It Works

There are two fundamental modes of operation: the inverse-time mode, and the instantaneous mode that provides current-limiting protection for system equipment and conductors.

The inverse-time mode incorporates special electronic counters that provide an appropriate delayed response based on the fault current magnitude. The TCC can be tailored to meet the special coordination requirements of the application.

The instantaneous mode provides current limitation whenever the rate-of-rise of current exceeds the threshold value determined by the control module.

Fault Fiter operation

Disconnect Style (600-ampere)


Disconnect with Uni-Rupter Style


Disconnect Style (1200-ampere)

Fault Fiter® Electronic Power Fuse Time-Current Characteristic Curves

Compound
Curve TypeFuse TypeTCC NumberPDFExcel
Minimum Melting Fault Fiter TCC Number 420-7 PDF EXCEL
Total Clearing Fault Fiter TCC Number 420-7-2 EXCEL
Instantaneous
Curve TypeFuse TypeTCC NumberPDFExcel
Minimum Melting Fault Fiter TCC Number 400-7 PDF EXCEL
Total Clearing Fault Fiter TCC Number 400-7-2 EXCEL
Inverse
Curve TypeFuse TypeTCC NumberPDFExcel
Minimum Melting Fault Fiter TCC Number 410-7 PDF EXCEL
Total Clearing Fault Fiter TCC Number 410-7-2 PDF EXCEL
Subloop
Curve TypeFuse TypeTCC NumberPDFExcel
Minimum Melting Fault Fiter TCC Number 422-7 PDF EXCEL
Total Clearing Fault Fiter TCC Number 422-7 PDF EXCEL
Time-Delayed Compound
Curve TypeFuse TypeTCC NumberPDFExcel
Minimum Melting Fault Fiter TCC Number 421-7 PDF EXCEL
Total Clearing Fault Fiter TCC Number 421-7 PDF EXCEL


Parallel Fault Fiter® Electronic Power Fuses

Inverse
Curve TypeFuse TypeTCC NumberPDFExcel
Minimum Melting Fault Fiter TCC Number 410-7-P PDF EXCEL
Total Clearing Fault Fiter TCC Number 410-7-2-P PDF EXCEL

  Not Available. Please contact your S&C Sales Office to obtain a copy.

A new version of the Coordinaide protection and coordination assistant software is now available for use. Key new features include:

  • Download a device’s curve data-points in a .CSV file format.
  • A new notification for “Transformer (Damage Curve)” device indicates how other device TCC curves are affected.
  • Curve selections were updated for the S&C TripSaver® II Cutout-Mounted Recloser:
    • Added NE and NK Speed under “Definite Time and Fuse Link” selection
    • Added a 140-A trip-coil rating for McGraw Type L, V4L, and 4E devices
    • Added “S&C A*” fast curves for McGraw Type 4E, 4H, L and V4L devices
  • A new Provide Feedback feature was added to submit feedback right from the application.
  • An updated User Guide now includes revision history.
Click the link below to access the new version of the Coordinaide protection and coordination assistant software today!


The Coordinaide protection and coordination assistant software lets you quickly and easily select the optimal protective device (e.g., fuses, TripSaver II Cutout-Mounted Reclosers, Vista® Underground Distribution Switchgear, or IntelliRupter® PulseCloser® Fault Interrupters) to:

  • Protect transformers against damaging overcurrents and coordinate with primary- and secondary-side protective devices.  See how S&C's novel Transformer Protection Index (TPI) can be used to determine if the primary fuse will protect against certain types of secondary-side faults, including arcing phase-to-ground secondary-side faults.
  • Protect capacitor units against case rupture.
  • Protect underground cables from insulation damage due to excessive temperatures.
  • Protect overhead conductors from damage due to annealing.
  • Confirm the proper operation of protective devices against incident-arc energy curves for various Personal Protective Equipment (PPE) levels.
  • Selectively coordinate two or more devices in series to minimize service interruptions.

Launch Coordinaide

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