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Overview
Shinsung S Type Fuse Cutout provides protection to the overhead electrical distribution system. This Fuse Cutout provides reliable protection from low-level overloads that just melt the fuse link, intermediate faults, and very high faults, through maximum interrupt capacity.
S Type Fuse Cutout also provides a visible break sectionalizing point for maintenance personnel and functions as a loadbreak switch, when used in conjunction with a portable loadbreak tool.
The S Type cutout meets or exceeds applicable requirements of ANSI C37.41 (1988) standards.
Outstansding Features
 A half inch inside diameter of the Shinsung cutout's 100 ampere fusetube increases internal pressure giving superior and reliable expulsion action. During frequently encountered intermediate fault ranges, this diameter also permits higher TRV (transient recovery voltage) values to be tolerated. This small bore design eliminates any concern related to high impedance phase-to-phase faults on ungrounded wye and delta systems. The inside liner is constructed of arc-quenching born fiber. The tube is made of fiberglass which permits the smaller bore and provides a higher bursting strength. It is protected from the weather and environment by a special ultra-violet resistant coating. Also, the Shinsung fusetube operates with fuselinks from all major suppliers.
Shinsung Fuse cutout may be packed together with one bracket with bolt accessories for crossarm mounting. Bracket is galvanized steel for long lasting service. Fuse Cutouts can be ordered without bracket.
By using a copper arc shortening rod inside the top of the fusetube, higher interrupt ratings are obtainable. An arc shortening rod is attached to the cap of some fusetubes and lowers the fuse link within the fusetube. This permits a much shorter arc, resulting in less arc energy, less violence during interrupting and higher interrupting capacities. It is necessary to use fuse links with removable buttonheads when arc shortening rods are employed.
Tin-plated bronze parallel groove type terminals are standard on Shinsung cutouts. They can accommodate aluminum or copper conductor sizes ranging from No. 6 solid copper through 4/0 ACSR or 250 MCM stranded copper.
Standard Construction
The S Type cutout has an all copper current path. All contacts are silver-plated. Terminals are tin-plated bronze for use with copper or aluminum conductors.
All cutouts are furnished with galvanized steel hooks for use with a portable loadbreak tool. These sturdy hooks are mounted on the top support and serve to guide the fuseholder into the latch socket when closing at an off-center angle.
The contact latch is attached to the top stainless steel support to provide a smooth self-aligning action during closing even in severely corrosive environments. The top contact provides a socket-type cavity for latching the fuseholder. The top contact is made of a highly conductive copper strip with silver-plated embossments to resist corrosion. The contacts are held under constant pressure designed to maintain firm contact with the fuseholder contact surface until fault interruption is accomplished.
The hinge on the S Type cutout employs large pivot areas for the fuseholder's trunnion and is cast of a copper alloy chosen for its strength and corrosion resistance. The hinge contacts are highly conductive copper alloy stampings and are plated to assure low resistance current transfer from the trunnion casting. The parallel current paths are backed up by high strength cantilever springs and are riveted to the hinge castings. Fuseholder can be dropped into place and easily lifted up and out. No tricky maneuvering.
The insulators used on the S Type cutouts are glazed porcelain. The metal to metal leakage distance on various voltages cutout insulators can be seen on "Ratings and Specification".
The solid cap on the single vent fuseholder is a copper alloy, silver-plated to provide efficient current transfer. An integral ring is provided in the top tube casting for opening and closing the fuseholder with conventional disconnecting tools from the ground.
NEMA type B bracket.
Electrical Characteristics
S Type Fuse Cutouts have maximum design voltage ratings to simplify the confusing ratings of fuse cutouts. There are no restrictions on application to grounded wye, ungrounded wye, or delta systems having maximum operating voltages (line-to-line) equal to or less than the fuse cutout maximum design voltage rating. Interruption tests have been performed at full system line-to-line voltage. For all voltage classes, there is continuous current rating of only 100 amps available.
| Catalog Number |
S-15-110-10 |
S-15-110-16 |
S-27-125-8 |
S-27-125-12 |
S-27-150-8 |
S-27-150-12 |
| MaximumDesign Voltage |
15 kV |
15 kV |
27 kV |
27 kV |
27 kV |
27 kV |
| Nominal System Voltage |
Thru 14.4 kV |
Thru 14.4 kV |
Thru 24.9 kV |
Thru 24.9 kV |
Thru 24.9 kV |
Thru 24.9 kV |
| Continuous Current |
100 A |
100 A |
100 A |
100 A |
100 A |
100 A |
Rated Impulse
Withstand Voltage (BIL) |
110 kV |
110 kV |
125 kV |
125 kV |
150 kV |
150 kV |
| Interrupting Capacity (Asym)
|
10,000 A |
16,000 A |
8,000 A |
12,000 A |
8,000 A |
12,000 A |
| Leakage Distance to Ground |
8.5 inch |
8.5 inch |
13 inch |
13 inch |
19 inch |
19 inch |
| Net Weight |
7.6 kg |
7.6 kg |
9.0 kg |
9.0 kg |
13.5 kg |
13.5 kg |
Dimensions and Weights
| Catalog Number |
S-15-110-10 |
S-15-110-16 |
S-27-125-8 |
S-27-125-12 |
S-27-150-8 |
S-27-150-12 |
| A |
406 mm |
416 mm |
416 mm |
| B |
137 mm |
181 mm |
181 mm |
| c |
273 mm |
318 mm |
318 mm |
| D |
89 mm |
79 mm |
79 mm |
| E |
559 mm |
679 mm |
679 mm |
| Net Weight |
7.6 kg |
9.0 kg |
13.5 kg |
* fitted with NEMA type B bracket.
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