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The C90Plus provides the flexibility, advanced logic, and automation in a single platform to address a wide-range of issues where a standalone solution is preferable, including automatic bus transfers, load shedding and load restoration schemes.
What's New in the C90Plus
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Expanded Bay Control Capability
- Up to six circuit breakers and thirty individual disconnect switches can be controlled via a single C90Plus, all addressable from standard communication protocols like IEC 61850 and DNP 3.0
- The C90Plus now features six individually configurable single-line diagrams on the optional user control HMI for custom control and visualization of up to six bays
- Interface with an even greater number of signals with new high-density I/O options. The C90Plus can collect up to 115 individual status inputs, or control up to 60 individual outputs
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Software Ease-of-Use
- EnerVista Viewpoint Engineer now available for graphical configuration of Protection and Automation FlexLogic™
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Cyber-Security
- Enabling NERC/CIP compliance
- Dual Permission access requiring permission from both the user and from SCADA operators before settings can be changed or commands can be given to the relay
- Remote and Local Setting and Control passwords
- Configurable lockout responses to unsuccessful password access attempts
- Successful password access logged in Events Record
- Logging of user commands in the Security Audit Trail Report - creates a record and sequence of events for troubleshooting and security auditing
Applications
Breaker protection & control for single and double breaker arrangements with high speed breaker failure reset and dual-breaker autoreclose to allow increased system loading and improved system stability Bay controller for up to six breakers in a single chassis, offering faster integration and reduced footprint Substation event & digital fault and disturbance recording to meet regulatory requirements for system monitoring at generation and transmission facilities Advanced Load Shedding and Load Restoration Schemes, including co-ordinated underfrequency load shedding and automated load restoration Custom bus transfer schemes, including Main-Tie-Main (MTM), and high speed motor bus transfer
Features and Benefits:
Automation Controller
Advanced Automation FlexLogic™ user-programmable logic engine, completely independent from Protection FlexLogic™, including Math processing Control functions, including under/overfrequency, rate-of-change-of-frequency and undervoltage for advanced load shedding, load restoration and dynamic volt/var control schemes High density I/O options ideally suited for applications, such as Gas Insulated Stations, that require a large number of status inputs and outputs
Circuit Breaker Protection & Control
Protection designed to allow increased line loading and shorter critical clearing times for constrained transmission systems -
Standalone breaker failure and reclosing relay for single and dual-breaker arrangements
Breaker failure reset times of 5/8 of a power system cycle reduces margins required for breaker failure reset and allows for reduce critical fault clearing angles Single/three-pole Four-shot dual breaker autoreclosing User-programmable Protection FlexLogic™ for custom schemes (protection schemes executed every 1 ms) Directional and non-directional overcurrent protection Synchrocheck for single and dual breaker applications
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| The C90Plus has 12 pre-configured bay single-line diagrams and controls for corresponding bay equipment. |
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Phasor display of sequence components showing the standing unbalance in the line |
Monitoring & Metering
Metering functions ranging from basic system metering to Data Logging and Synchrophasors as per IEEE C37.118
High resolution, fast scan (128 samples/cycle) transient recorder, featuring 30 second storage capacity and 10 microsecond time stamp accuracy
Disturbance/Swing recorder with 5 minutes of recording capacity to record long-duration events like power swings, voltage sag and swell and trending
Sequence of Events recorder - 8000 time tagged events, with 0.5 ms scan of digital inputs
Communications
Supports the following industry standard protocols for easy, direct integration into DCS and SCADA systems: IEC 61850, DNP 3.0, IEC60870-5-104, Modbus RTU, Modbus TCP
3 independently configurable IP addresses, supporting independent engineering access and Single/Dual IP redundancy for various communications architectures
User Interface
Digital Annunciator - configurable color LCD annunciator for custom alarms
HMI for display and control functions -
Comprehensive data visualization
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Up to 6 User programmable diagrams for bay monitoring and control
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Pre-programmed single line diagrams for common bus configurations, including ring-bus, double breaker and breaker-and-half configurations
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Pre-programmed comprehensive displays for Metering, Bay Control, Fault Reports, Sequence of Event Reports, and Real Time Phasor Displays
Security
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Remote and Local Setting and Control passwords
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Dual Permission Access Control
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Configurable lockout responses to unsuccessful password access attempts
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Successful password access logged in Events Record
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Detailed Security Audit Trail Report records relay configuration changes and commands executed
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