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.
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.
