The ‘CGI 14N’ Numerical Protection Relay is a fully digital relay based on microprocessor technology with analogue to digital conversion of the measured values and subsequent numerical processing. It uses a specialized digital signal processor (DSP) as the computational hardware, along with associated software. The relay has feature of IDMT as well as instantaneous protection for both over current & earth elements with breaker failure protection (50BF). The relay can be field programmed as 3O/C + 1E/F or 2 O/C + 1E/F + 1SE/F or 1RE/F (optional) or SE/F (Definite Time Function
only). The front panel features a 6-button keypad & a 16×2 LCD display that provides an easy user interface.
Salient Features:
* Breaker Failure detection.
* Communication port: RS485 / RS232 (optional).
* Communication Protocol:IEC60870-5-1O3 & IEC61850.
* Programming through local Keypad.
* Selectable Definite Time or IDMT curves as per IEC standards.
* Rated input current selectable 1A or 5A.
* Password protection to guard against unauthorized access & editing of settings.
* Recording of ten last fault records with time stamping.
* Parameterization & downloading of records through “CG View” software (optional).
* Mounting/Case: Drawout/Non-Drawout.
Application
* Primary circuit protection on distribution networks at any voltage level.
* Backup/auxiliary protection for transformers, generators and motors.
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