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  • SMD® Power Fuses for Substations, Outdoor Distribution
    SMD-20 Power Fuses, rated 200 amperes continuous, utilize SMU-20 Fuse Units These fuse units are offered in a variety of ampere ratings, in five different speeds — S C “K,” Standard, Slow, Very Slow, and “DR ” They provide interrupting ratings of up to 14,000 amperes symmetrical at 60 Hz SMD-40 Power Fuses, rated 400 amperes continuous, utilize SMU-40 Fuse Units These fuse units
  • Specifications - sandc. com
    Obtain the catalog number of the applicable SMU-20® or SMU-40® Fuse Unit from Table 4 and Table 5 on page 10, taking care to match the voltage rating of the fuse unit to that of the mounting
  • SM Power Fuses for Substations, Outdoor Distribution
    SM Power Fuses are especially suited for protecting transformers, capacitor banks, and cables in outdoor distribution substations through 34 5 kV
  • SM SML Power Fuses for Underground Distribution, Indoor
    SM and SML Power Fuses are especially suited for protecting cables and medium-to-large power transformers on utility as well as industrial, commercial, and institutional power systems, through 34 5 kV
  • Installation, Replacement, and Maintenance - sandc. com
    The following instructions cover installation, replace-ment, and maintenance of SMU-20 Fuse Units used with indoor-distribution SM-20, SML-20, and SME-20 mount-ings or with outdoor-distribution SMD-20 mountings
  • S C Type SMD-20 Power Fuses with SMU-20® Fuse Units
    SMU-20 Fuse Units have silver or pretensioned nick-el-chrome elements drawn through precision dies to very accurate diameters and are of solderless construction, brazed into their terminals Their melting time-current characteristic (TCC) curves are precise, with only 10% total tolerance in melting current compared to the 20% tolerance of many fuses Helical coiling of the fusible elements and
  • Time-Current Characteristic (TCC) Curves - sandc. com
    S C’s Time-Current Characteristic (TCC) Curves are available in Adobe® Acrobat® format as well as in Microsoft® Excel format for your use in other applications Click the + - accordions below to see the TCC Curves
  • PMH Pad-Mounted Gear - sandc. com
    ♥ SMU-20 Fuse Units are available in ratings through 200K amperes as well as 200E amperes ♣ Applicable to solidly grounded-neutral systems only, with fuses connected by single-conductor, concentric-neutral-type cable to a transformer (s) Rating is 9,400 amperes RMS, symmetrical (405 MVA) for all other applications
  • SMD SMD -20 -20 POWER POWER FUSES FUSES - sandc. com
    S C’s unique approach to SMU-20 Fuse Unit construction uses a breathable design that works to maintain equalized pressure between the environment and the interior of the fuse unit When combined with the nondamageable fusible element design and tight tolerances for which S C is known, SMD-20 Power Fuses provide many years of precise and reliable protection SMD-20 Power Fuses offer:
  • Total Clearing Time–Current Characteristic Curves SMU Fuse Units–S C “K . . .
    Total Clearing Time–Current Characteristic Curves SMU Fuse Units–S C “K” Speed BASIS–These fuse units are tested in accordance with the procedures described in IEEE Standard C37 41, and they are rated to comply with IEEE Standard Specifications for distribution cut-outs and fuse links, C37 42 As required by these standards, the minimum melting current is not less than 200% of fuse





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