Current Limiting System Protection

High Current Limiters

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G&W Electric’s High Current Limiter was developed at the request of a major utility. It features interrupt ratings to 120 kA thereby filling a void with traditional fuses limited to 50 kA. This eliminates the need for costly reactors. A primary application is in transformer tertiary winding circuits. It is a backup fuse intended to be applied in series with lower rated interrupters. Overloads are cleared by the lower rated device while major faults are cleared by the limiter.


High Current Limiter
Electrical Ratings Chart for High Current Limiters (HCLs)
Max. Voltage Up to 38kV
BIL Impulse Up to 200kV
Continuous Current Through 50A
Interrupting Rating Up to 120kA sym