When fuses protecting overhead distribution transformers operate, 70% of the time the issue is temporary and requires no additional repair work. That equates to unnecessary maintenance costs for issues that could have been altogether avoided.
VacuFuse II Self-Resetting Interrupters bring fault-testing technology furthest toward the end of the grid than had previously been possible, ensuring advanced end-to-end lateral protection that provides greater reliability and satisfaction for all customers.
Advantages
70% nuisance outages means wasted O&M
Learn MoreImproves customer satisfaction
Learn MoreSimple and straightforward installation
Learn MoreMitigates risk for crews and the environment
Learn MoreOverview
Case Studies
Inventing Technology for Grid Reliability’s New Frontier
Read Full Case StudyNeed Support?
S&C is here to help you through any stage in your grid-modernization journey, from system studies to operation videos. Explore more below.
Construction
Product Details
Information Bulletin 466-211 contains curve plots for all VacuFuse II Self-Resetting Interrupter TCCs. Data points for these curves can be found here.
(On mobile, swipe left for remaining ratings information.)
Table 1. Complete VacuFuse II Self-Resetting Interrupter—For a new installation. Includes VacuFuse II interrupter, cutout mounting (less mounting bracket), and connectors.
Cutout Mounting Size, kV | Phase-to-Neutral Voltage Rating, kV | BIL, kV1 | Amperes | Amperes Interr., Sym. |
---|---|---|---|---|
Cont., RMS2 | ||||
15 | 7.2 - 9.0 | 110 | 20 | 6 300 |
25 | 7.2 - 9.0 | 150 | 20 | 6 300 |
15 | 7.2 - 15.5 | 110 | 20 | 6 300 |
25 | 7.2 - 15.5 | 150 | 20 | 6 300 |
- 1 BIL is achieved with the VacuFuse II interrupter dropped open.
- 2 Available in 2- to 20-ampere models, with minimum trip currents from 4 to 40 amperes.
Table 2. VacuFuse II Self-Resetting Interrupter Only—For retrofit in an existing present-production (“-R10” or “-R11”) S&C-only cutout mounting.
Cutout Mounting Size, kV | Phase-to-Neutral Voltage Rating, kV | BIL, kV1 | Amperes | Amperes Interr., Sym. |
---|---|---|---|---|
Cont., RMS2 | ||||
15 | 7.2 - 9.0 | 110 | 20 | 6 300 |
25 | 7.2 - 9.0 | 125/150● | 20 | 6 300 |
15 | 7.2 - 15.5 | 110 | 20 | 6 300 |
25 | 7.2 - 15.5 | 125/150● | 20 | 6 300 |
- 1 BIL is achieved with the VacuFuse II interrupter dropped open.
- 2 Available in 2- to 20-ampere models, with minimum trip currents from 4 to 40 amperes.
- ● BIL is dependent on the cutout mounting into which the VacuFuse II interrupter is installed.