System for estimating the frequency of the power signal on a...

System for maintaining fault-type selection during an...

System for power transformer differential protection

System for precharging a dc link in a variable speed drive

System for precharging a dc link in a variable speed drive

System for protecting a dc power distribution bus during hot...

System for protecting power distribution circuit against...

System for protecting telecommunications equipment from...

System for protection of dynamo-electric a.c. machines...

System for reducing disaster damage

System for reliable prevention of the restarting of a machine

System for wireless monitoring of circuit breakers

System interconnection device and distributed power supply...

System interconnection device and method of designing same

System of protection against short circuits and fulminations

System with circuitry for suppressing arc formation in...

System, device, and method for over-current relays...

Systems and methods for arc fault detection

Systems comprising a cluster of rockets carried by a...

Systems, devices, and methods for arc fault detection