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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

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Improves customer satisfaction

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Simple and straightforward installation

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Mitigates risk for crews and the environment

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Overview

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466-4500-Educational-Material.jpg

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Construction

VacuFuse® II Self-Resetting Interrupter anatomy

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.

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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.

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