Have you ever had a distribution-fuse cutout operate unnecessarily or for an unknown cause?
The outages caused by such operations affect your maintenance and operations costs. This, in turn, affects your fuse-link costs, making a $5 fuse link in reality a $13 fuse link or even higher. Learn more about the cost of unnecessary fuse-link operations here.
The key to eliminating this impact is to remove the unnecessary cutout operations by using reliable fuse links that act only when required.
Positrol® Fuse Links are designed to provide reliable protection, and they operate only when a fault occurs within the cutout’s zone of protection. With Positrol Fuse Links, you eliminate unnecessary cutout operations and thereby reduce your maintenance and operation costs.
Purchase Positrol Fuse Links (and other Fuse Products) Direct from S&C
Visit S&C Fuse Store
Features
Superior Fault-Interruption Performance
Unsurpassed Secondary-Fault Performance
Time Current Characteristics Don’t Change Over Time
Helically Coiled Silver* Fuse Elements
Close Melting-Current Tolerance*
Construction
*Refer to published TCC curves for fuse element material and melting-current tolerances
Product Details
Styles
| Style | Overall Length, Inches (mm) | Speed | Rating, Amperes |
|---|---|---|---|
 Universal Not Usable in Discontinued S&C Positect® Cutouts |
23 (584) | S&C Standard | 1 through 200 |
| S&C “K” | 6K through 200K | ||
| S&C “T” | 6T through 200T | ||
| S&C “QR” | 1QR through 200QR | ||
| S&C “N” | 5N through 200N | ||
| S&C Coordinating | 101 through 103 | ||
| Universal Usable in Discontinued S&C Positect® Cutouts |
23 (584) | S&C Standard | 1 through 100 |
 Indicating Usable Only in Discontinued S&C Positect® Cutouts |
10 (254) | S&C Standard | 3 through 100 |
 Open Usable Only in Discontinued Open Link Cutouts |
8 (203) | S&C Standard | 1 through 25 |
Ratings & Time-Current Characteristic (TCC) Curves
| Curve Type | Ampere Ratings | Fuse Type | TCC Number | Excel | |
|---|---|---|---|---|---|
| Minimum Melting | All | Fuse Link | TCC Number 123-6 | EXCEL | |
| Total Clearing | 1 through 200 | Fuse Link | TCC Number 123-6-2 | EXCEL |
| Curve Type | Ampere Ratings | Fuse Type | TCC Number | Excel | |
|---|---|---|---|---|---|
| Minimum Melting | All | Fuse Link | TCC Number 165-6 | EXCEL | |
| Total Clearing | 6K through 200K | Fuse Link | TCC Number 165-6-2 | EXCEL |
| Curve Type | Ampere Ratings | Fuse Type | TCC Number | Excel | |
|---|---|---|---|---|---|
| Minimum Melting | All | Fuse Link | TCC Number 170-6 | EXCEL | |
| Total Clearing | 6T through 200T | Fuse Link | TCC Number 170-6-2 | EXCEL |
| Curve Type | Ampere Ratings | Fuse Type | TCC Number | Excel | |
|---|---|---|---|---|---|
| Minimum Melting | All | Fuse Link | TCC Number 171-6 | EXCEL | |
| Total Clearing | 3KSR through 200KSR | Fuse Link | TCC Number 171-6-2 | EXCEL |
No longer available; TCC data for reference only.
| Curve Type | Ampere Ratings | Fuse Type | TCC Number | Excel | |
|---|---|---|---|---|---|
| Minimum Melting | All | Fuse Link | TCC Number 166-6 | EXCEL | |
| Total Clearing | 1QR through 200QR | Fuse Link | TCC Number 166-6-2 | EXCEL |
| Curve Type | Ampere Ratings | Fuse Type | TCC Number | Excel | |
|---|---|---|---|---|---|
| Minimum Melting | All | Fuse Link | TCC Number 175-6 | EXCEL | |
| Total Clearing | 3DR through 20DR | Fuse Link | TCC Number 175-6-2 | EXCEL |
No longer available; TCC data for reference only.
| Curve Type | Ampere Ratings | Fuse Type | TCC Number | Excel | |
|---|---|---|---|---|---|
| Minimum Melting | All | Fuse Link | TCC Number 167-6 | EXCEL | |
| Total Clearing | 5N through 200N | Fuse Link | TCC Number 167-6-2 | EXCEL |
| Curve Type | Ampere Ratings | Fuse Type | TCC Number | Excel | |
|---|---|---|---|---|---|
| Minimum Melting | All | Fuse Link | TCC Number 172-6 | EXCEL | |
| Total Clearing | 101, 102, 103 | Fuse Link | TCC Number 172-6-2 | EXCEL |
Speed Comparison Example
Coordinaide™ — The S&C Protection and Coordination Assistant
- Download a device’s curve data-points in a .CSV file format.
- A new notification for “Transformer (Damage Curve)” device indicates how other device TCC curves are affected.
- Curve selections were updated for the S&C TripSaver® II Cutout-Mounted Recloser:
- Added NE and NK Speed under “Definite Time and Fuse Link” selection
- Added a 140-A trip-coil rating for McGraw Type L, V4L, and 4E devices
- Added “S&C A*” fast curves for McGraw Type 4E, 4H, L and V4L devices
- A new Provide Feedback feature was added to submit feedback right from the application.
- An updated User Guide now includes revision history.
The Coordinaide protection and coordination assistant software lets you quickly and easily select the optimal protective device (e.g., fuses, TripSaver II Cutout-Mounted Reclosers, Vista® Underground Distribution Switchgear, or IntelliRupter® PulseCloser® Fault Interrupters) to:
- Protect transformers against damaging overcurrents and coordinate with primary- and secondary-side protective devices. See how S&C's novel Transformer Protection Index (TPI) can be used to determine if the primary fuse will protect against certain types of secondary-side faults, including arcing phase-to-ground secondary-side faults.
- Protect capacitor units against case rupture.
- Protect underground cables from insulation damage due to excessive temperatures.
- Protect overhead conductors from damage due to annealing.
- Confirm the proper operation of protective devices against incident-arc energy curves for various Personal Protective Equipment (PPE) levels.
- Selectively coordinate two or more devices in series to minimize service interruptions.
