Current Limiting System Protection
Unparalleled Fault Current System Protection
Our commutating current limiters provide fault current protection for systems rated 15.5 through 38kV and for applications that include power transformer protection, system upgrades, reactor bypass, cogeneration and closing bus ties. Additionally, they help in reducing arc flash energy, which is crucial for improving personnel safety and preventing arc flash events. Limiters are available for a wide range of overcurrent interrupting and current limitation requirements.
A Safer Solution
Current limiters combine the benefits of circuit breakers and overcurrent protective devices to deliver reliable multi-hazard electrical protection that help keep your workers and equipment safe from arc flashes and system damage.
Sealed for a Range of Environments
Our current limiters are compact and feature completely sealed construction for successful installation indoors or outdoors, mounted on a pole or set within an enclosure. They are designed to protect downstream equipment in various environments, ensuring reliable operation and reducing the risk of arc-flash energy at connected devices.
Real-Time Data
Built-in current transformers provide real-time current values to the internal electronics to help users protect against short-circuit interruptions without the need to add new equipment.
Simple System Upgrade
Operators can upgrade their systems by installing our current limiters, which can significantly reduce the energy associated with an arc flash incident, without the need to replace underrated equipment such as circuit breakers, reclosers, switches or busbars.
Current Limiting System Protection Types
Explore our current limiting system protection solutions by type to find those best suited to your needs.
CLiP® Current Limiting Protectors
Our CLiP Current Limiting Protectors has the unique ability to provide high continuous current ratings with current limitation and ultra high-speed operation. Its single-phase and three-phase protection with remote enable/disable works in systems rated 2.8–38 kV with continuous current up to 5000A.
CLiP®-LV Current Limiting Protectors
CLiP-LV Current Limiting Protector is a unique over-current protection device that interrupts potentially damaging fault current. It works with voltages up to 750V and continuous currents up to 4000A. CLiP-LV Current Limiting Protector UL rating offers added certainty of its testing and safe operation in a variety of applications.
CLiP-LV Current Limiting Protectors integrate into the power distribution system for enhanced protection.
Encapsulated Current Limiting Fuses
Encapsulated current limiting fuses deliver an extremely durable system through a rugged design that uses epoxy technology. Their economical, one-piece epoxy encapsulated fuses are easy to install and remove.
High Current Limiters
High current limiters feature interrupt ratings to 120 kA. Their backup fuses are designed for application in series with lower rated interrupters.
Power Assisted Fuses
Power assisted fuses are designed for systems rated 2.8–38 kV and continuous currents up to 600A. They can operate as part of indoor and outdoor applications and are easy to install and maintain.
Frequently Asked Questions
What is a current limiting circuit breaker?
A current limiting circuit breaker is a protective device that not only breaks the circuit when the current exceeds a safe threshold, but also acts quickly to limit the severity of the fault current, protecting the electrical system from damage and reducing the risk of fire.
What is the purpose of a non-current limiting fuse?
The purpose of a non-current limiting fuse is to provide basic overcurrent protection by opening a circuit when the current exceeds safe levels, but without the rapid response features of current-limiting fuses, making them suitable for applications where immediate interruption is less critical.
What is the advantage of using a current limiting fuse?
The primary advantage of using a current limiting fuse is its capacity to protect electrical equipment by swiftly breaking the circuit during overloads or short circuits, limiting blast and arc flash exposure, mitigating fires, reducing magnitude of peak let-through current and shielding overdutied equipment from damage and catastrophic failure.
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