NS Engineers Vatva, Ahmedabad, Gujarat

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

The 'CGV 24C' 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 specialized digital signal processor (DSP) as the computational hardware, along with associated software.The relay has feature of Definite Time Lag (DTL) characteristic. The relay can be field programmed for Under voltage / Over Voltage and Neutral Displacement protection functions. The front panel features a 6-button keypad & a 16x2 LCD display that provides an easy user interface. Features Communication port: RS485 / RS232 (optional) Programming through local Key pad 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) Application Primary circuit protection on distribution networks at any voltage level Backup/auxiliary protection for transformers, generators, motors and capacitor protection

The AEGIS range of multifunction relay platform provides cost effective, integrated Numerical Protection, Control, Monitoring & Measuring with Communication functionality. The platform has stateof- the-art technology which ensures superior performance. The multifunction capability of AEGIS finds application as main or backup protection in almost every area of power system protection.   Protection Function Directional/Non-Directional Over Current Protection. Directional/Non-Directional Measured ground fault Protection. Under/Over Voltage Protection. Neutral Voltage Displacement Protection Negative Sequence Over Current Protection. Cold Load Pick-up & Inrush restraint (68). Circuit Breaker Failure Protection. Features Self Monitoring Graphic LCD (160*160 dots) to view/change setting, view events and analog information. 1A & 5A CT inputs in same relay. Wide range of site selectable universal operating time curve (IEC & IEEE) or user defined curve. Wide range of Auxiliary Supply Expandable input/output Modules. Outputs configurable to Self/Manual reset. Multi level password protection. Four Independent setting groups. User friendly setting and disturbance record analysis software. Programmable alarm/trip indication LEDs with text legend Communication Feature: - Front USB port for local Communication. - Rear Port: RS485 serial port for remote communication. - Two optional RJ45/Fiber optic Ethernet ports for remote networking. - The relay supports open protocols of MODBUS, RTU, IEC60870-5-1O3 & IEC 61850 Application Feeder Protection: Comprehensive protection for distribution feeders. Main or backup protection on MV&HV systems Capacitor banks, reactors protection based on the neutral current and Residual voltage detection principle. Motor Protection Relay: Wide range of protection for a synchronous motor. Medium size and large size rotating machines. Transformer Protection Relay: - Differential protection with dual slope characteristics used for the protection of    two winding distribution power transformer. - Protection of two winding distribution power transformer. Other than differential remaining protections can be used as backup protection. For other than differential remaining protections can be used as backup protection.

The AEGIS range of multi function relay platform provides cost effective, integrated Numerical Protection, Control, Monitoring & Measuring with Communication functionality. The platform has stateof- the-art technology which ensures superior performance. The multi function capability of AEGIS finds application as main or backup protection in almost every area of power system protection.   Features General Features :- Self Monitoring Graphic LCD (160*160 dots) to view/change setting, view events and analog information. Wide range of site selectable universal operating time curve (IEC & IEEE) or user defined curve Wide range of Auxiliary Supply Expandable input/output Modules. Outputs configurable to Self/Manual reset. Multi level password protection. Four Independent setting groups. User friendly setting and disturbance record analysis software. Programmable alarm/trip indication LEDs with text legend. Protection Functions:- Directional/Non-Directional Over Current Protection. Directional/Non-Directional Measured ground fault Protection. Under/Over Voltage Protection. Neutral Voltage Displacement Protection. Negative Sequence Over Current Protection. Cold Load Pick-up & Inrush restraint (68). Circuit Breaker Failure Protection. Application Feeder Protection Relay Motor Protection Relay Transformer Protection Relay

The 'CGI 14N/C' 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 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). The front panel features a 6-button keypad & a 16x2 LCD display that provides an easy user interface.   Features Breaker Failure detection Communication port: RS485 / RS232 (optional) Programming through local Key pad 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

A new concept for increased reliability of Circuit Breaker operations - CBM provides an integrated solution for control, monitoring and metering of a CB. The design is based on latest state - of - the - art technology using 16 bit digital signal controller which ensures error free operation, enhances the system reliability. CBM is user friendly equipment with all programming and control functions through the front facia.   Features Six digital fault inputs & four relay outputs plus two separate solid state outputs for trip & close operation. Field programmable control logic between fault inputs & relay outputs. Field programmable current & potential transformer ratios. Local / remote mode selection. Inbuilt anti pumping logic. Inbuilt master trip relay logic. Inbuilt trip circuit supervision logic. Inbuilt operation counter & fault counter Inbuilt 3phase under & over voltage protection (optional). Front panel keyboard for programming with LCD display. Replaces all electromechanical switches Replaces analog / digital meters Key Advantage: Reduction in wiring. Reduction in panel space. High reliability.  Control Functions: - CB Close / Trip along with Master trip relay function. - Anti pumping - Trip Circuit Supervision. Monitoring Function: - Common alarm Scheme & 6 window annunciater. Measurement Function: - 3ph Voltage & Current. - Power Factor - kW, kVA & kVAR. - Operation Counter & Fault Counter. Indications: - VCB ON - VCB OFF - Spring Charge Indication - VCB in test - VCB in service