Specifications. S&C Power Fuses Types SM and SMLa. For use with SM Refill Units or SMU Fuse Units. Indoor Distribution (4.16 kv through 34.

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1 S&C Power Fuses s SM and SMLa Indoor Distribution (4.16 through 34. ) For use with SM Refill Units or SMU Fuse Units Specifications Conditions of Sale STANDARD: Seller s standard conditions of sale set forth in Price Sheet 10 apply, except as modified under WARRANTY QUALIFICATIONS on pages 2 and 3. SPECIAL TO THIS PRODUCT: NOTE: S&C SM and SML Power Fuses are available separately only when the ultimate user is an electric utility (investor-owned, municipal, federal, state, county, or RUS-financed cooperative) or other qualified power user. These fuses are available to other users in the form of S&C Metal-Enclosed Gear; please refer to your nearest S&C Sales Office. SM and SML Power Fuses are also available separately to qualified original-equipment manufacturers, for subsequent installation in metal enclosures in accordance with S&C s applicable minimum construction specifications, as set forth under WARRANTY QUALIFI- CATIONS appearing on pages 2 and 3. INCLUSIONS: Complete mountings include a base, Cypoxy d Insulators, and fuse live parts. Complete mountings are factory-assembled and adjusted, and ready for installation.,, S, and SM-20 Power Fuses: and Power Fuses are offered in both the disconnect and non-disconnect styles; S Power Fuses in the non-disconnect style only; and SM-20 Power Fuses in the disconnect style only. These power fuses (in either style) consist of three distinct components: a fuse mounting, a holder (,, and S Power Fuses) or fuseunit end fittings including Silencer (SM-20 Power Fuses), and a refill unit (,, and S Power Fuses) or fuse unit (SM-20 Power Fuses). Each component is ordered separately as described on page 3 under How to Order a Complete Power Fuse. These power fuses are not designed for live-switching duties. and Power Fuses: These power fuses are available in the disconnect style only. The Power Fuse consists of three distinct components: a fuse mounting including Uni-Rupter and the same base as the SM-20 Power Fuse, fuse-unit end fittings (including Silencer) identical to those for the SM-20 Power Fuse, and the same SMU-20 Fuse Unit used with the SM-20 Power Fuse. The Power Fuse consists of three distinct components: a fuse mounting including Uni-Rupter and the same base as the SM-20 and Power Fuses, a fuse holder similar to the Holder except for the provision of contacts used to operate Uni-Rupter, and the same SM-4 Refill Unit used with Power Fuses. ( Holders are not interchangeable with Holders in the same mounting.) Components for SML Power Fuses are ordered separately as described on page 3 under How to Order a Complete Power Fuse. and Power Fuse Mountings with Uni- Rupter provide -ampere single-pole live switching of single-phase and three-phase circuits (on systems where line-to-line voltage does not exceed ). EXCLUSIONS: Complete mountings and live parts do not include holders, fuse-unit end fittings, refill units, or fuse units. Complete mountings and live parts do not include connectors. Various connectors are available as listed in the table on page 12. Specify quantity and catalog number of connectors desired. SPECIFICATION DEVIATIONS,, S, and SM-20 Power Fuses: Mountings for these power fuses can be supplied less insulators. Add suffix -Z1 to the catalog number. Mountings for these power fuses can be supplied less bases but including insulators. Add suffix -Z4 to the catalog number. These mountings cannot be supplied for back connection. Live parts for these power fuses can be purchased separately. See tables on pages 4 and 6. When these mountings are to be provided with special connectors, consult your nearest S&C Sales Office for availability. Mountings can be supplied with tin-plated terminal pads. To specify, add suffix -Z to the catalog number. Not applicable to SM-20 Power Fuses, which are equipped with tin-plated terminal pads as a standard feature. Disconnect style parallel Power Fuses are furnished with aluminum terminal pads as a standard feature. m Cypoxy is the S&C trademark for S&C s cycloaliphatic epoxy resin system. Cypoxy is nontracking, self-scouring, nonweathering... there s never a compromise of insulation integrity. S&C Cypoxy station post insulators meet or exceed the electrical and mechanical-strength requirements established in ANSI C29.9 for porcelain standard-strength station post insulators. w S&C Power Fuses s SM and SML are manufactured in accordance with a quality system certified to ISO April 14, 8 S&C Electric Company Specification Bulletin 2-31

2 S&C Power Fuses s SM and SML Conditions of Sale Continued and Power Fuses: Mountings for these power fuses cannot be supplied less insulators. Mountings for these power fuses cannot be supplied less bases but including insulators. These mountings cannot be supplied for back connection. Live parts for these power fuses cannot be purchased separately. When these mountings are to be provided with special connectors, consult your nearest S&C Sales Office for availability. Application Notes For and Power Fuses only: S&C Power Fuses with Uni-Rupter are designed for the following single-pole live-switching duties in single-phase or three-phase circuits of distribution systems rated 14.4 or : Live Switching Opening Transformer switching transformer load currents up through amperes, as well as transformer magnetizing currents associated with the applicable loads. Line-switching load splitting (parallel or loop switching) and load dropping of currents up through amperes; also line dropping (charging currents typical for distribution systems of these voltage ratings). Cable switching load splitting (parallel or loop switching) and load dropping of currents up through amperes; also cable dropping (charging currents typical for distribution systems of these voltage ratings). Live Switching Closing Circuit closing inrush currents associated with the above opening duties. Duty-cycle j fault closing one-time capability equal to the interrupting rating of the fuse (in amperes RMS asymmetrical): For the 22,400 at 14.4, 20,000 at : For the 20,000 at 14.4, 1,000r at. And two-time capability of 13,000 amperes RMS asymmetrical at 14.4 and. A Note on Single-Pole Switching In single-pole switching of ungrounded-primary threephase transformers or banks (or single-phase transformers connected line-to-line), circuit connections or parameters may, in some cases, produce excessive overvoltages. In particular, for the following applications above 22, single-pole switching by any means including Uni- Rupter should be performed only under the conditions stated in italics: Switching unloaded or lightly loaded delta-connected or ungrounded-primary wye-wye connected three-phase transformers or banks (or line-to-line connected singlephase transformers), rated 10 A or less three-phase, or 0 A or less single-phase or of any A when combined with unloaded cables or lines where maximum system operating voltage exceeds 22. Singlepole switching should be performed only if each phase is carrying % load or more, or if the transformer or bank is temporarily grounded at the primary neutral during switching. Switching loaded or unloaded ungrounded-primary wyedelta connected three-phase transformers or banks alone or combined with unloaded cables or lines where maximum system operating voltage exceeds 22. Single-pole switching should be performed only if each phase is carrying % load or more and if the lightingload phase is always switched open first (or switched closed last); or if the transformer or bank is temporarily grounded at the primary neutral during switching. WARRANTY QUALIFICATIONS: For the standard warranty contained in seller s standard conditions of sale (as set forth in Price Sheet 10) to apply to S&C Power Fuses s,,, S, SM-20, or when installed in indoor, outdoor, or indoor-outdoor enclosures of other than S&C manufacture, the enclosures must be constructed in accordance with S&C s applicable minimum construction specifications to be found in the current revision of one of the following publications: DATA BULLETIN 2-62: S&C Power Fuses SM Indoor Distribution (4.16 through 34. ) DATA BULLETIN 2-64: S&C Power Fuses SML Indoor Distribution ( and ) Minimum Construction Specifications For Indoor and Outdoor Metal Enclosures with Fuses Minimum Construction Specifications For Indoor and Outdoor Metal Enclosures with Fuses j These values represent the fault-closing capabilities of the fuse with Uni-Rupter when the fuse is closed with a purposeful thrust without hesitation. The values are the available fault currents into which the fuse can be closed the specified number of times (once or twice), with Uni-Rupter remaining operable and able to carry and interrupt rated current. r 20,000 amperes RMS asymmetrical when applied on solidlygrounded-neutral systems only with fuses connected by single-conductor, concentric-neutral type cable (or directly coupled) to a transformer or transformers. 2 S&C Specification Bulletin 2-31

3 S&C Power Fuses s SM and SML DATA BULLETIN : S&C Alduti-Rupter Switches with Power Fuses Indoor Distribution (4.8 and ) DATA BULLETIN 7-60: S&C Mini-Rupter Switches with Power Fuses Indoor Distribution (4.8 and 14.4 ) Minimum Construction Specifications For Metal Enclosures Indoor and Outdoor Minimum Construction Specifications For Metal Enclosures Indoor and Outdoor For the standard warranty contained in seller s standard conditions of sale (as set forth in Price Sheet 10) to apply to live parts when purchased separately, the live parts must be assembled on mountings in accordance with instructions to be found in the current revision of one of the following publications: INSTRUCTION SHEET 2-0: S&C Power Fuses s and Indoor Distribution INSTRUCTION SHEET 2-10: S&C Power Fuses s,, and S Indoor Distribution INSTRUCTION SHEET 2-3: S&C Power Fuses SM-20 Indoor Distribution Live Parts for Disconnect Style Live Parts for Non-Disconnect Style Live Parts for Disconnect Style With respect to S&C Power Fuses s SM or SML when installed in submersible enclosures of other than S&C manufacture, warranty does not apply unless enclosures are furnished by an approved supplier and are of watertight construction providing proper electrical clearances and proper space for fuse handling. The standard warranty contained in seller s standard conditions of sale (as set forth in Price Sheet 10) does not apply when fuses of other than S&C manufacture are used in S&C SM or SML Mountings or when S&C Holders, Refill Units, or Fuse Units are used in mountings of other than S&C manufacture. How to Order a Complete Power Fuse s,,, and S 1. Obtain the catalog number of the desired mounting from the Mounting column on pages 4 through 6. If only live parts are desired, refer to the Live Parts column. Note: Live parts for Power Fuses cannot be purchased separately. 2. Obtain the catalog number of the applicable holder from the Holder column on pages 4 through 6, reading from the same line in which the selected mounting is listed. 3. Obtain the catalog number of the applicable refill unit from the tables on pages 9 through 11, taking care to match the refill unit type to that of the mounting, and to select the voltage rating of the refill unit as directed in the refill unit tables. Note: For each mounting rated 720E amperes, order two holders and two refill units. 4. Obtain the catalog number of the desired connector from the table on page 12. Order two connectors for each mounting or set of live parts. Note: Parts, insulating barrier assemblies, and switch blades listed on pages 13 and 14 are ordered using the method outlined above. s SM-20 and 1. Obtain the catalog number of the desired mounting from the Mounting column on pages 4 and. If only live parts are desired, use the Live Parts column. Note: Live parts for Power Fuses cannot be purchased separately. 2. Obtain the catalog number of the applicable fuse unit end fittings from the same table used to select the mounting. 3. Obtain the catalog number of the applicable fuse unit from the tables on pages 7 and 8, taking care to match the voltage rating of the fuse unit to that of the mounting. 4. Obtain the catalog number of the desired connector from the table on page 12. Order two connectors for each mounting or set of live parts. Note: Parts, insulating barrier assemblies, and switch blades listed on pages 13 and 14 are ordered using the method outlined above. How to Order Handling Tools Obtain the catalog number(s) of recommended handling tool(s) from the table on page 1. Refer to Specification Bulletin S&C Specification Bulletin

4 S&C Power Fuses s SM and SML SM POWER FUSES Disconnect Style Less Connectors and Less Refill Units or Fuse Units Style Fuse Nom. Max BIL Max, RMS Interrupting1 (Sym.) Mounting2 (including Live Parts, less Fuse-Unit End Fittings or Holder) Fuse-Unit End Fittings3 (SM-20) or Holder4 ( or ) Live Parts (less Fuse- Unit End Fittings or Holder) Page Reference for Dimensional Information SM SM SM Disconnect 4 Opening Silencer Vertical R R2d n 6 0 SM R R a 86632R2 v 86633R R Disconnect 4 Opening Snuffler Vertical r 000r SM R3 8710R4m 87442R3 8712R4m 87073R j 86641R2d 86641R2d 86642R2 v 86642R2 v 86643R R R2 8719R R2 8719R R R Symmetrical ratings assigned are based on available short-circuit current at locations where the X/R ratio is 1. The interrupting ratings expressed in amperes RMS asymmetrical are 1.6 times the symmetrical ratings listed. Higher symmetrical ratings have been determined for these fuses where X/R = 10 and X/R =. These higher ratings as well as asymmetrical ratings are given in S&C Descriptive Bulletin These mountings cannot be supplied for back connection. 3 Includes Silencer. 4 Includes Silencer () or Snuffler (). n is 12,00 amperes RMS symmetrical when applied on solidly grounded-neutral systems only with fuses connected by single-conductor, concentric-neutral type cable (or directly coupled) to a transformer or transformers. r Applies to 7.2- refill unit in 7.2- holder for 4.8- system voltage only. is 37,00 amperes RMS symmetrical for refill unit in 7.2- holder for system voltages through a Supersedes 34.-, 10- BIL SM-4 Mounting and 34.-, - BIL SM-4 Mounting 18734R1. m Two holders required with each mounting. j Supersedes 34.-, 10- BIL SM- Mounting and 34.-, - BIL SM- Mounting 18744R2. d Rated 7.2 nominal, for use in listed 4.8- mountings for system voltages through 4.8, or in discontinued 7.2- mountings for system voltages through 7.2. v Rated 14.4 nominal, for use in listed - mountings or in discontinued mountings. 4 S&C Specification Bulletin 2-31

5 S&C Power Fuses s SM and SML SML POWER FUSES Disconnect Style Less Connectors and less Refill Units or Fuse Units Style Fuse Nom. Max BIL Max, RMS Load Dropping1 Interrupting2 (Sym.) Mounting3 (including Live Parts, less Fuse-Unit End Fittings or Holder) Fuse-Unit End Fittings4 () or Holder4 () Page Reference for Dimensional Information Disconnect 4 Opening Silencer Vertical m SML-4 SML a The Uni-Rupter associated with these fuses can carry and interrupt load current up to and including the emergency peak-load capabilities of the fuses. Furthermore, the fuse with Uni-Rupter has a one-time duty-cycle fault-closing capability equal to the interrupting rating of the fuse (expressed in amperes RMS asymmetrical), and a two-time dutycycle fault-closing capability of 13,000 amperes RMS asymmetrical. The duty-cycle fault-closing capability defines the level of available fault current into which the fuse can be closed the specified number of times (once or twice), without quick-make mechanism and when operated vigorously through its full travel without hesitation at any point, with the Uni-Rupter remaining operable and able to carry and interrupt current up to the emergency peak-load capabilities of the fuse. 2 Symmetrical ratings assigned are based on available short-circuit current at locations where the X/R ratio is 1. The interrupting ratings expressed in amperes RMS asymmetrical are 1.6 times the symmetrical ratings listed. Higher symmetrical ratings have been determined for these fuses where X/R = 10 and X/R =. These higher ratings as well as asymmetrical ratings are given in S&C Descriptive Bulletin These mountings cannot be supplied for back connection. 4 Includes Silencer. m is 12,00 amperes RMS symmetrical when applied on solidly grounded-neutral systems only with fuses connected by single-conductor, concentric-neutral type cable (or directly coupled) to a transformer or transformers. a Rated 14.4 nominal, for use in listed - mountings. S&C Specification Bulletin 2-31

6 S&C Power Fuses s SM and SML SM POWER FUSES Non-Disconnect Style Less Connectors and less Refill Units Style Fuse Nom. Max BIL Max, RMS Interrupting1 (Sym.) Mounting2 (including Live Parts, less Holder) Holder3 Live Parts (less Holder) Page Reference for Dimensional Information Non- Disconnect Silencer Vertical n 6 0 SM-4 87R R R a 86801R2d 86802R2 v 86803R R Non- Disconnect Snuffler Vertical r SM R R3 8703R j 86811R2d 86812R2 v 86813R R2 8709R S Non- Disconnect Super Snuffler Vertical m SM R3 S 86402R2 v 8709R Symmetrical ratings assigned are based on available short-circuit current at locations where the X/R ratio is 1. The interrupting ratings expressed in amperes RMS asymmetrical are 1.6 times the symmetrical ratings listed. Higher symmetrical ratings have been determined for these fuses where X/R = 10 and X/R =. These higher ratings as well as asymmetrical ratings are given in S&C Descriptive Bulletin These mountings cannot be supplied for back connection. 3 Includes Silencer (), Snuffler (), or Super Snuffler (SM SS). n is 12,00 amperes RMS symmetrical when applied on solidly grounded-neutral systems only with fuses connected by single-conductor, concentric-neutral type cable (or directly coupled) to a transformer or transformers. r Applies to 7.2- refill unit in 7.2- holder for 4.8- system voltage only. is 37,00 amperes RMS symmetrical for refill unit in 7.2- holder for system voltages through m 60-hertz only. a Supersedes 34.-, 10- BIL SM-4 Mounting and 34.-, - BIL SM-4 Mounting R1. j Supersedes 34.-, 10- BIL SM- Mounting and 34.-, - BIL SM- Mounting R2. d Rated 7.2 nominal, for use in listed 4.8- mountings for system voltages through 4.8, or in discontinued 7.2- mountings for system voltages through 7.2. v Rated 14.4 nominal, for use in listed - mountings or in discontinued mountings. 6 S&C Specification Bulletin 2-31

7 S&C Power Fuses s SM and SML SMU-20 FUSE UNITS (For use in SM-20 or Mountings) Nominal, Max K s E s DR s S&C K TCC 16-2 TCC a TCC 13-2 TCC S&C Very Slow TCC S&C DR TCC K 703 3DR 623 6K 706 E 61 4DR 624 8K 708 7E 617 DR 6 10K E DR 6 12K E DR K E DR K E DR K 7020 E K E K E K E K E K E K E K E K E E E These fuse units are equally suitable for use in SMD-20 Outdoor Distribution Mountings; and also, for use with SME-20 Fuse-Unit End Fittings listed in Specification Bulletin 66-31, S&C Manual PME Pad-Mounted Gear and Specification Bulletin , S&C Remote Supervisory PME Pad-Mounted Gear. a This fuse unit is not E rated. TABLE CONTINUED c S&C Specification Bulletin

8 S&C Power Fuses s SM and SML SMU-20 FUSE UNITS (For use in SM-20 or Mountings)1 Nominal, Max23 K s E s DR s S&C K TCC 16-2 TCC 11-2 S&C DR TCC a TCC 13-2 TCC S&C Very Slow TCC K DR K E DR K E DR K E DR K E DR K E DR K E DR K 7030 E K E K E K E K E K E K E K E K E E E Nominal, 38 Max K s E s DR s S&C K TCC 16-2 TCC a TCC 13-2 TCC S&C Very Slow TCC S&C DR TCC K DR K E DR K E DR K E DR K E DR K E DR K E DR K 7040 E K E K E K E K E K E K E K E K E E E These fuse units are equally suitable for use in SMD-20 Outdoor Distribution Mountings. 2 These fuse units are equally suitable for use with SME-20 Fuse-Unit End Fittings listed in Specification Bulletin 66-31, S&C Manual PME Pad-Mounted Gear and Specification Bulletin , S&C Remote Supervisory PME Pad-Mounted Gear. 3 Also suitable for protection of single-phase-to-neutral circuits (lines or transformers) on 20/34. GrY- systems. a This fuse unit is not E rated. 8 S&C Specification Bulletin 2-31

9 S&C Power Fuses s SM and SML SM-4 REFILL UNITS (For use in SM-4 and SML-4 Holders) 7.2 Nominal, 8.3 Max Nominal, Max TCC R R4 TCC 13-4 TCC TCC R4 122R4 TCC 13-4 TCC S&C Coord. TCC E 12100R4 1R4 E R4 1R4 7E R R4 10E 12101R R4 13E R R4 1E 1210R4 10R4 1220R4 20R4 20E R4 1030R R4 2030R4 E R4 1040R R4 2040R4 30E 12100R4 100R R4 200R4 40E R4 1060R R4 2060R4 0E 12107R4 107R R4 207R4 6E R4 1100R R4 2100R4 80E 1211R4 11R4 1221R4 21R4 100E 12110R4 110R R4 210R4 1E 121R4 1R4 122R4 2R4 10E 1210R4 10R4 1220R4 20R4 17E 121R4 1R4 122R4 2R4 E R4 1300R R4 2300R R4j Nominal, Max2 34. Nominal, 38 Max TCC 11-4 TCC R R R R4 TCC 13-4 TCC TCC 13-4 TCC E 12300R R4 E R R4 7E R R4 10E 12301R R4 13E R R4 1E 1230R4 30R4 1240R4 40R4 20E R4 3030R R4 4030R4 E R4 3040R R4 4040R4 30E 12300R4 300R R4 400R4 40E R4 3060R R4 4060R4 0E 12307R4 307R R4 407R4 6E R4 3100R R4 4100R4 80E 1231R4 31R4 1241R4 41R4 100E 12310R4 310R R4 410R4 1E 123R4 3R4 124R4 4R4 10E 1230R4 30R4 1240R4 40R4 17E 123R4 3R4 124R4 4R4 E R4 3300R R4 4300R4 1 Rated 7.2 nominal, for use in SM-4 Holders rated 7.2 when applied in listed mountings rated 4.8 or in discontinued mountings rated These refill units are also suitable for use with SME-4Z Holders listed in Specification Bulletin 66-31, S&C Manual PME Pad-Mounted Gear and Specification Bulletin , S&C Remote Supervisory PME Pad- Mounted Gear. 3 Rated 14.4 nominal, for use in SM-4 Holders rated 14.4 when applied in listed mountings rated or in discontinued mountings rated j This S&C Coordinating refill unit should be applied where the maximum continuous load current does not exceed amperes and where all fault currents below 1000 amperes will be cleared by another fuse. S&C Specification Bulletin

10 S&C Power Fuses s SM and SML SM- REFILL UNITS (For use in SM- Holders) 4.16 Nominal, 4.76 Max1 7.2 Nominal, 8.3 Max2 TCC 11-4 TCC R R4 TCC 13-4 TCC S&C Coord. TCC R R4 TCC 13-4 TCC S&C Coord. TCC E 13000R R4 E R R4 7E R R4 10E 13001R R4 13E R R4 1E 1300R4 2600R4 1310R4 20E R R R4 E R R R4 30E 13000R R R4 40E R R R4 0E 13007R R R4 6E R R R4 80E 1301R4 2601R4 1311R4 100E 13010R R R4 1E 130R4 260R4 131R4 10E 1300R4 2600R4 1310R4 17E 130R4 260R4 131R4 E R R R4 0E R R R R4 300E 13000R R R R4 400E R R R R R4mj R4j R4mj R4j 1 2 TCC R4 132R4 TCC Nominal, Max3 Nominal, Max TCC S&C Coord. TCC TCC R R4 TCC 13-4 TCC E 13R R4 E 137R R4 7E R R4 10E 13201R R4 13E R R4 1E 1320R4 2620R4 1330R4 2630R4 20E R R R R4 E R R R R4 30E 13200R R R R4 40E R R R R4 0E 13207R R R R4 6E R R R R4 80E 1321R4 2621R4 1331R4 2631R4 100E 13210R R R R4 1E 132R4 262R4 133R4 263R4 10E 1320R4 2620R4 1330R4 2630R4 17E 132R4 262R4 133R4 263R4 E R R R R4 0E R R R R4 300E 1300R4 2600R R R4 400E R R R4j R4j TABLE AND FOOTNOTES CONTINUED c 10 S&C Specification Bulletin 2-31

11 S&C Power Fuses s SM and SML FOOTNOTES 1 Rated 4.16 nominal, for use in SM- Holders rated 7.2 when applied in listed mountings rated 4.8 for system voltages through Rated 7.2 nominal, for use in SM- Holders rated 7.2 when applied in listed mountings rated 4.8 for 4.8- system voltage only, or in discontinued mountings rated 7.2 for system voltages of 4.8 through Rated 14.4 nominal, for use in SM- Holders rated 14.4 when applied in listed mountings rated or in discontinued mountings rated m numbers are in italics because these are 7.2- refill units. Interrupting ratings are those listed in S&C Descriptive Bulletin 2-30 for 7.2- Power Fuses applied to systems rated 2.4/4.16 Y. j These S&C Coordinating refill units should be applied where the maximum continuous load current does not exceed 400 amperes and where all fault currents below 3000 amperes for s R4 and R4 and 4000 amperes for s R4 and R4 will be cleared by another fuse. SM- REFILL UNITS (For use in SM- Holders) 34. Nominal, 38 Max 1 2 TCC R R4 TCC 13-4 TCC E 13400R4 E R4 7E R4 10E 13401R4 13E R4 1E 1340R4 2640R4 20E R R4 E R R4 30E 13400R R4 40E R R4 0E 13407R R4 6E R R4 80E 1341R4 2641R4 100E 13410R R4 1E 134R4 264R4 10E 1340R4 2640R4 17E 134R4 264R4 E R R4 0E R R4 300E 13400R R4 S&C Specification Bulletin

12 S&C Power Fuses s SM and SML CONNECTORS Applicable Power Fuse Illustration and Description Accommodating Conductor Disconnect Styles Upper Terminal Pad Lower Terminal Pad Non-Disconnect Styles Upper Terminal Pad Lower Terminal Pad Bronze Body, Tin Plated, Single Z\x C\v0 Galvanized Steel Bolt No. 2 solid (33.6 mm 2 ) through 00 kc mil (33 mm 2 ) stranded copper or aluminum SM-20 SM-20 S S 4749 Bronze Body, Tin Plated, Single Z\x Z\v0 Galvanized Steel Bolt No. 2 solid (33.6 mm 2 ) through 00 kc mil (33 mm 2 ) stranded copper or aluminum 394 Aluminum Alloy Body, Tin Plated, Two Z\x Z\x0 Galvanized Steel Bolts No. 2 solid (33.6 mm 2 ) through 00 kc mil (33 mm 2 ) stranded copper or aluminum SM-20 S S 4744 Aluminum Alloy Body, Tin Plated, Two Z\x Z\v0 Galvanized Steel Bolts No. 2 solid (33.6 mm 2 ) through 00 kc mil (33 mm 2 ) stranded copper or aluminum 4746 No. 6 solid (13.3 mm 2 ) through 0 kc mil (168 mm 2 ) copper or aluminum SM R1-A S S 464R1-B Standard Bronze Pad Terminal, Tin Plated, Four-Bolt. Includes Z\x-inch galvanized steel hardware for attachment to terminal pads of fuses 1/0 solid (3. mm 2 ) through 00 kc mil (33 mm 2 ) copper or aluminum 2/0 stranded (89 mm 2 ) through 800 kc mil (39 mm 2 ) copper or aluminum SM-20 SM-20 46R1-A S S 46R1-B 467R1-A S S 467R1-B 12 S&C Specification Bulletin 2-31

13 S&C Power Fuses s SM and SML PARTS For use with,,, and S Power Fuses Item Rated (, Nominal) For Holder Spare Spring-and-Cable Assembly 4.8 or 7.2 a For use only in holders carrying an arrow-shaped nameplate. Springand-cable assemblies for holders which do not carry an arrow-shaped nameplate are no longer available so a new holder with the appropriate voltage rating must be ordered. SM-4S or r Product discontinued. To replace an SM-4S Snuffler ( FA ), order one Silencer as listed, plus one fuse pivot, S j Not usable in disconnect style mounting. FA-972 FA-2341a or 14.4 SM-4S or FA-973 FA FA or 14.4 FA-2342a 23 or 34. SM-4S or SM-4S or FA-974 FA-2343a FA-97 FA-2344a Spare Silencer All ratings or FDA-1079 Spare Snuffler All ratings SM-4S S FA r FDA-106 FA j PARTS For use with SM-20 and Power Fuses Item Rated (, Nominal) For Power Fuses Spare Silencer All ratings SM-20 or FDA-1103 S&C Specification Bulletin

14 S&C Power Fuses s SM and SML INSULATING BARRIER ASSEMBLIES For use with SM and SML Power Fuses Item Rated (, Nominal) For Power Fuses Three-Phase Insulating-Barrier Assembly 1 Replacement Barrier SA B-770 SA B-771 SA B-772 or S SA B-773 SM-20,, or SA B-774 Insulating Barriers SA B-796 SA B-797 SM-20,, or SA B SA B SA B-42-9 SM-20 SA B Includes four C\zn-inch (4.8 mm) NEMA Grade GPO3 fiberglassreinforced polyester barriers, plus a complete set of mounting hardware and adjustable-length interbarrier spacers. 2 Replacement NEMA Grade GPO3 fiberglass-reinforced polyester barriers listed in this specification bulletin must only be installed with barriers of similar design and construction. 3 Includes one C\zn-inch (4.8 mm) NEMA Grade GPO3 fiberglassreinforced polyester barrier; does not include mounting hardware or interbarrier spacers. For mounting hardware sufficient to mount one barrier, specify two (2) fastener assemblies, CA For interbarrier spacers, refer to the nearest S&C Sales Office. SWITCH BLADES1 Item Nominal Max, Cont. Switch Blades, for use in lieu of Holders in SML-4 Mountings Switch Blades, for use in lieu of SMU-20 Fuse Units in Mountings Switch Blades, for use in lieu of Holders in SM-4 Mountings Switch Blades, for use in lieu of Holders in SM- Mountings When switch blades are used in lieu of Holders or SMU-20 Fuse Units, the Uni-Rupter associated with these switches can carry and interrupt load currents up to and including the emergency peakload capabilities of the fuses. Furthermore, the switches with Uni- Rupter have a one-time duty-cycle fault-closing capability equal to the interrupting ratings of the fuses (expressed in amperes RMS asymmetrical) and a two-time duty-cycle fault-closing capability of 13,000 amperes RMS asymmetrical. The duty-cycle fault-closing capability defines the level of available fault current into which the switch can be closed the specified number of times (once or twice), without quickmake mechanism and when operated vigorously through its full travel without hesitation at any point, with the Uni-Rupter remaining operable and able to carry and interrupt currents up to the emergency peak-load capabilities of the fuse. For switches with Uni-Rupter, the one-second rating is 14,000 amperes RMS symmetrical. For - switches with Uni- Rupter, the one-second rating is 12,00 amperes RMS symmetrical. The momentary ratings of the switches equal or exceed the interrupting ratings of the fuses. 14 S&C Specification Bulletin 2-31

15 S&C Power Fuses s SM and SML RECOMMENDED HANDLING TOOLS Item Style For Power Fuse Grappler Disconnect 4 Opening SM-20,m,m, 4423 Large Clamp Disconnect 4 Opening j 4410R3 Locking Prong Non-Disconnect,m,j S 4404 Universal Pole Refer to Specification Bulletin m Rated and below. SMU-20 Fuse Units and Holders rated 34. can be removed by hand after properly grounding the upper and lower live parts of the mounting. j Rated and below. Holders rated or 34. can be removed by hand after properly grounding the upper and lower live parts of the mounting. S&C Specification Bulletin

16 S&C Power Fuses s SM and SML SM-20 Disconnect, 4 Opening Max,,, and 34. Nom. Max BIL Amps, Max Mounting1 (including Live Parts, less Fuse- Unit End Fittings) Fuse-Unit End Fittings2 Live Parts (less Fuse- Unit End Fittings) Dimensions in Inches A 1 A 2 B C D F M R Mtg. Net Weight, Lbs. Fuse-Unit End Fittings SM SM Z\, 8Z\, 6Z\v 22C\, Z\x 17Z\v 23Z\x 12 1 SM SM C\, 9C\, 7Z\x 26C\v 3Z\v 22Z\v 34Z\x 18Z\x SM SM M\, 11M\, 10 32C\v 3Z\v 28Z\v These mountings cannot be supplied for back connection. 2 Includes Silencer. 16 S&C Specification Bulletin 2-31

17 S&C Power Fuses s SM and SML and Disconnect, 4 Opening, 300, and 400 Max, 4.8,, and m These holes may be used for attachment of barriers only when the minimum recommended energized part-to-barrier clearance and minimum recommended barrier-to-ground clearance (in vicinity of energized parts), as listed in S&C Data Bulletin 2-62, have been met or exceeded. Amps, Max Nom. Max BIL Mounting1 (including Live Parts, less Holder) SM-4 SM-4 SM-4 SM- SM- SM R R R R R R1 Holder R2d Live Parts (less Holder) 86632R2r R R2d 86642R2r 86643R2 1 These mountings cannot be supplied for back connection. 2 Includes Silencer () or Snuffler () R R R2 d Rated 7.2 nominal, for use in listed 4.8- mountings for system voltages through 4.8, or in discontinued 7.2- mountings for system voltages through 7.2. Dimensions in Inches Net Weight, Lbs. A 1 A 2 B C D E F G H J K L M R Mtg. Holder B\, 8Z\, 6C\v 9Z\v 7Z\x 14B\, 1C\v 14 B\, 8Z\, 6C\v 9Z\v 7Z\x 14B\, 1 C\v C\v C\v 4Z\, 4Z\, 4Z\, M\, 12Z\x 7 8M\, 16Z\x 7 8M\, 20C\v 7Z\x Z\x 16Z\x 20C\v 7 7 7Z\x 4Z\v 4Z\v 4Z\v 4Z\v 7C\v 7C\v 6 7C\v 7C\v M\, Z\x 13C\v 29 3M\, 30M\, 16Z\v 34 3M\, 41 22M\, 3 4M\, 29Z\v 1Z\v 3 4M\, 34Z\x 17C\v 40 4M\, 44Z\, 24Z\v Z\x r Rated 14.4 nominal, for use in listed - mountings or in discontinued mountings. 32 S&C Specification Bulletin

18 S&C Power Fuses s SM and SML and Disconnect, 4 Opening and 300 Max, 34. Amps, Max Nom. Max BIL Mounting1 (including Live Parts, less Holder) Holder2 Live Parts (less Holder) Dimensions in Inches Net Weight, Lbs. D E K L M R Mtg. Holder SM d 86634R Z\, 8M\, 4 3M\, 48 24C\v SM r 86644R R M\, 0M\, 26Z\, These mountings cannot be supplied for back connection. 2 Includes Silencer () or Snuffler (). d Supersedes 34.-, 10- BIL SM-4 Mounting, ; and 34.-, - BIL SM-4 Mounting, 18734R1. r Supersedes 34.-, 10- BIL SM- Mounting, ; and 34.-, - BIL SM- Mounting, 18744R2. 18 S&C Specification Bulletin 2-31

19 S&C Power Fuses s SM and SML Disconnect, 4 Opening 720 Max, 4.8 and Amps, Max Nom. Max BIL Mounting1 (including Live Parts, less Holder) SM- SM- 8710R4 8712R4 Holder R2d 86642R2r 1 These mountings cannot be supplied for back connection. 2 Holders are rated 400 amperes maximum. Two holders required with each mounting. 3 Includes Snuffler. Live Parts (less Holder) 8719R3 8719R3 Dimensions in Inches Net Weight, Lbs. A B C F M R Mtg. Holder C\v 8Z\v 7 Z\x Z\x 16Z\x 29B\, 3C\, 1Z\x Z\x d Rated 7.2 nominal, for use in listed 4.8- mountings for system voltages through 4.8, or in discontinued 7.2- mountings for system voltages through 7.2. r Rated 14.4 nominal, for use in listed - mountings or in discontinued mountings. S&C Specification Bulletin

20 S&C Power Fuses s SM and SML Disconnect, 4 Opening Max, and Amps, Max Nom. Max BIL 1 Mounting1 (including Live Parts, less Fuse-Unit End Fittings) Fuse-Unit End Fittings2 Dimensions in Inches Net Weight, Lbs. 1 These mountings cannot be supplied for back connection. 2 Includes Silencer A 1 A 2 C D F J M R Mtg. 8C\, 9Z\x 8 Z\, 9 C\, 22C\, 26 C\v 4 3Z\v 18 22Z\v 6Z\v 7Z\v 31Z\x 34C\v 19Z\x 20 B\, Fuse-Unit End Fittings S&C Specification Bulletin 2-31

21 S&C Power Fuses s SM and SML Disconnect, 4 Opening Max, and Nom. Max BIL Amps, Max 1 Mounting1 (including Live Parts, less Holder) SML-4 SML Holder2 Dimensions in Inches Net Weight, Lbs. 9232r 9233 A 1 A 2 C F J M R Mtg. Holder 8C\, 9Z\x 8 Z\x 9 C\v 22C\, 26 C\v 17C\v 22Z\v 6Z\v 7Z\v 33 36C\v Z\, These mountings cannot be supplied for back connection. 2 Includes Silencer. r Rated 14.4 nominal, for use in listed - mountings. S&C Specification Bulletin

22 S&C Power Fuses s SM and SML,, and S Non-Disconnect, 300, and 400 Max, 4.8,, and Nom. Max BIL Amps, Max Mounting1 (including Live Parts, less Holder) SM-4 SM-4 SM-4 SM- SM- SM- 87R R R R R3 8703R1 Holder R2d 86802R2w 86803R R2d 86812R2w Live Parts (less Holder) R2 8709R2 Dimensions in Inches Net Weight, Lbs. A 1 A 2 B C D E F H J K N P R Mtg. Holder B\, 8Z\, 6B\, 9Z\, 7Z\x Z\, Z\, 14B\, 1 B\, C\v Z\, M\, 8C\, 6M\, 9C\, 7Z\x Z\v Z\v 86813R2 8709R2 14M\, 1M\, C\v Z\v 12 8C\, 8C\, 8C\, 12Z\x 16Z\x 20C\v 4Z\v 4Z\v 7C\v 7C\v 6 4Z\x 4Z\x 4Z\x 3Z\, 3Z\, 3Z\, C\, C\, C\, 13 1Z\x 33Z\x SM R3 S 86402R2w 8709R2 8C\, 9C\, 7Z\x 32 Z\v 12Z\x 16Z\x 4Z\v 7C\v Z\v 3B\, 6Z\x These mountings cannot be supplied for back connection. 2 Includes Silencer (), Snuffler (), or Super Snuffler (SM SS). d Rated 7.2 nominal, for use in listed 4.8- mountings for system Z\x 16Z\x 20C\v 4Z\v 4Z\v 7C\v 7C\v 6 Z\v Z\v Z\v 3B\, 3B\, 3B\, 6Z\x 6Z\x 6Z\x 22 1Z\x 18 24B\, Z\x voltages through 4.8, or in discontinued 7.2- mountings for system voltages through 7.2. w Rated 14.4 nominal, for use in listed - mountings or in discontinued mountings S&C Specification Bulletin 2-31

23 S&C Power Fuses s SM and SML and Non-Disconnect and 300 Max, 34. K Nom. Max BIL Amps, Max Mounting1 (including Live Parts, less Holder) Holder2 Live Parts (less Holder) Dimensions in Inches Net Weight, Lbs. A 1 A 2 D E K N P R Mtg. Holder SM d 86804R C\, 17 C\, Z\, 8C\, 4Z\x 3Z\, C\, 23C\v SM r 86814R2 8709R2 16B\, 17 B\, Z\v 11 Z\v 3B\, 6Z\x 26Z\v These mountings cannot be supplied for back connection. 2 Includes Silencer () or Snuffler (). d Supersedes 34.-, 10- BIL SM-4 Mounting, ; and 34.-, - BIL SM-4 Mounting, R1. r Supersedes 34.-, 10- BIL SM- Mounting, ; and 34.-, - BIL SM- Mounting, R2. S&C Specification Bulletin