Trans-Rupter II® Transformer Protector
Other Transformer Protection Devices
Introduction
Electric utilities face ever-increasing demands to reduce costs and improve reliability. Until now, these goals were mutually exclusive when it came to transformer protection. You could either select a higher-cost transformer switch with advanced protection capabilities, like a circuit-switcher or circuit breaker, or you could choose a lower-cost device with limited protection capabilities, like power fuses or a high-speed ground switch.
But now there’s a device that meets both goals. S&C’s Trans-Rupter II Transformer Protector is designed exclusively for primary-side protection applications on distribution substation transformers. It gives you all the features you need for reliable transformer protection, and eliminates those you don’t. With its simple installation procedure and no periodic maintenance needs, Trans-Rupter II Transformer Protector not only ensures low installed cost, but low operating costs as well.
Trans-Rupter II Transformer Protector is available in two versions: Model EX is tripped from user-furnished overcurrent, differential, or sudden-pressure relays. Model SE is tripped from its own self-powered overcurrent protection system.
Compare Trans-Rupter II’s features to those of other transformer protective devices:
| Feature | Power Fuses | Circuit-Switchers | Circuit Breakers | Trans-Rupter II |
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| Three-Phase Tripping |  |
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| Activated by Relays | |
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| Resettable | |
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| High Interrupting Ratings | |
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| SCADA Compatibility | |
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| Mounting Flexibility | |
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| Low Cost | |
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