Self Powered Feeder Protection Relay

The ‘CGI 14S' Self Powered Numerical Protection Relay is designed for use in unmanned substation where dependable auxiliary power source is not available. The relay derives power for its operation from main current transformers. It also comprises integrated communication protocols for SCADA compliance.
The relay has feature of IDMT, as well as, instantaneous protection for both over current & earth elements. It accomplish Digital filtering of measured quantities by using discrete Fourier analysis to suppress high frequency harmonics and transient DC components induced by faults or system operations.
The front panel features a 8-button keypad & a 16x2 LCD display that provides an easy user interface.

• Features

• Self-powered relay, auxiliary power supply not required
• Communication port: RS485 / RS232
• Remote tripping via external voltage
• Programming through local Key pad
• Selectable Definite Time or IDMT curves as per IEC standards
• Password protection to guard against unauthorized access & editing of settings
• Trip indication via external flag indicator with mechanical reset
• Two potential free alarm contacts, latched type (bi-stable relay)
• Recording of ten last fault records with time stamp
• Parameterization & downloading of records through "CG View" software (optional)

• Application

• Primary circuit protection on distribution networks
• Auxiliary protection for transformers, generators, motors