9F60 Clip-On E-Rated Transformer Fuses, 15.5kV, 25.8kV and 38kV

DENCO's higher-voltage 9F60 series clip-on E-rated power distribution fuses cover 15.5kV, 25.8kV and 38kV. EJ-1 versions are for indoors or an enclosure, EJO-1 versions for indoors or outdoors. Ratings run from 0.5E to 200E on 12, 15, 18, 21 or 27 inch clip centers, with interrupting ratings from 13kA to 120kA RMS symmetrical depending on rating.

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At 15.5kV the EJ-1 range (2E to 10E, 82kA) fits 12 inch (305 mm) clips. The EJO-1 range on 15 inch (381 mm) clips runs from 0.5E to 100E, with 0.5E to 10E on a 2 inch barrel rated 120kA and 15E to 100E on a 3 inch barrel rated 50kA. Two further 15.5kV E-rated ranges at 50kA cover 5E to 100E on 15 inch clips and 65E to 200E on 18 inch (457 mm) clips.

At 25.8kV the EJ-1 range (0.5E to 2E, 35kA) fits 15 inch clips and the EJO-1 range (0.5E to 100E) fits 21 inch (533 mm) clips, at 35kA up to 10E and 25kA from 15E. The 38kV EJO-1 range uses a 3 inch barrel, 30.81 in (783 mm) long, on 27 inch (686 mm) clips from 1E to 80E, rated 26kA up to 10E and 13kA above. As with the lower voltages, the top ratings in each table are drawn as Fig. 2.

Specifications

Construction and options

• Cylindrical clip-on mounting in spring-reinforced clip-on holders
• Current-limiting, non-venting construction
• Blown-fuse indicator
• Label with catalog number and manufacturing date
• EJ-1: suitable for indoors or enclosure only; EJO-1: suitable for use indoors or outdoors
• Catalog performance line: high breaking capacity, high current limiting, low switching voltage, extremely short times, low power dissipation

Catalog numbers in this series

Applications

• Protection for 2.4kV to 34.5kV transformers or distribution systems (family-wide statement)

Standards and equivalents

• E-rating melting criteria per ANSI C37.46-2000 (100E or less: melt in 300 seconds at 200% to 240% of rating; over 100E: melt in 600 seconds at 220% to 264%)
• General purpose current-limiting fuse as defined by IEEE Std C37.40-2003

Wording is the catalog’s own. “In accordance with” a standard is not the same as certified or listed to it.

Curves and drawings

The catalog prints the following for this series: dimension drawings fig. 1 and fig. 2 (length a, diameter b, clip center c). This series is on pp.25, 33–36 of the January 2025 DENCO catalog. Access the catalog or ask for the drawing or curve you need.

Technical review

Specifications on this page are quoted from DENCO’s product catalog. Confirm any rating against DENCO engineering before specifying.

Related

• E-Rated Transformer Protection Fuses: the full family
• 9F60 / EJ-1 / EJO-1 clip-on E-rated fuses, 2.75kV to 8.25kV
• 9F62 / EJO-1 general purpose clip-on fuses
• 9F62 bolt-on E-rated fuses
• Clip Lock 14 (CL-14) E-rated fuses
• All fuse product families
• Cross-reference and discontinued replacement

Request a quote for 9F60 / EJ-1 / EJO-1 clip-on E-rated fuses, 15.5kV to 38kV