9F60 EJ-1 Clip-Mounted Potential Transformer Fuses, 0.625kV to 15.5kV

DENCO's clip-mounted PT fuses protect the primary windings of potential transformers. The tables list them from 0.625kV to 15.5kV in ratings from 0.25A up, with 50kA to 120kA RMS symmetrical interrupting ratings, on clip centers from 4.00 in to 11.5 in.

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Each voltage has its own body size. The small ferrule types use a 0.812 in (20.6 mm) diameter: DAAA at 0.625kV (100kA, 4.25 in / 108 mm clips), D24T at 2.4kV (50kA, 4.00 in / 102 mm clips), DAAB at 2.75kV (52kA), D48T at 4.8kV (80kA, 5 in / 127 mm clips) and D72T at 7.2kV (50kA, 8.88 in clips). D50T at 5.0kV uses a 1.00 in (25.4 mm) body at 80kA. The larger 1.562 in (40 mm) types, DBBB, DBDB, DBBD, DBBN, DBDE and DBHH, cover 2.75kV to 15.5kV on 6.00, 8.12 or 11.5 in clips, with DBHH at 15.5kV rated 120kA.

The fuses fit standard mounting clips and interchange with other brands, and the blown-fuse indicator is available on the 9F60 series. The power distribution PT page lists an open fuse trip indicator with 0.25 in trip length, suitability for indoor use or in an enclosure, a 0.625kV to 38kV voltage range, and notes that fuses can be designed to customer specifications.

Specifications

Construction and options

• Compact ferrule-type body fitting standard mounting clips
• Interchangeable with other fuse brands
• Current-limiting, high interrupting
• Non-venting for quiet operation
• Label with catalog number and manufacturing date
• Blown-fuse indicator available on the 9F60 series
• Suitable for use indoors or in an enclosure (power distribution PT fuses)
• Can be designed to customer specifications

Catalog numbers in this series

Applications

• Primary winding protection of potential transformers
• Protection for 0.625kV to 15.5kV transformers or distribution systems

Curves and drawings

The catalog prints the following for this series: dimension drawing (length, clip centers, end-cap length, diameter). This series is on pp.45–50 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

• Potential Transformer (PT) Protection Fuses: the full family
• All fuse product families
• Cross-reference and discontinued replacement

Request a quote for 9F60 / EJ-1 clip-mounted PT fuses