The C70 is an integrated protection, control, and monitoring device for shunt capacitor banks based on the well established and proven UR relay platform of GE Multilin. The C70 provides both the bank and system protection schemes for shunt capacitor bank protection. The current and voltage-based protection functions are provide sensitive protection for grounded, ungrounded single, and parallel capacitor banks and banks with taps.
Protect capacitor banks of a variety of configurations with sensitive current and voltage balance protection functions
Complete IEC 61850 Process Bus solution providing resource optimization and minimizing total P&C lifecycle costs
Adaptive compensation techniques truly compensation for the inherent bank unbalance providing sensitive protection
Robust network security enabling Critical Infrastructure Protection through user command logging, and dual permission access control
Custom programmable logics for advanced shunt capacitor bank controls
Flexible Automatic voltage regulation of shunt capacitor banks along with control supervision
Embedded IEC61850 Protocol
Reduced relay to relay wiring and associated installation costs through high-speed inter-relay communications
Ambient temperature monitoring with alarming when outside temperature exceeds upper thresholds
The C70 supports English, French, Russian, Chinese and Turkish languages on the front panel
Protection, Control, Monitoring and Automation of shunt capacitor banks of different voltages
Sensitive protection for grounded, ungrounded single and parallel capacitor banks and banks with taps, for a variety of capacitor bank configurations
Shunt capacitor banks based AVR and Capacitor control supervision
Suitable for protecting multiple capacitor banks
Voltage differential protection
Compensated Bank Neutral Voltage Unbalance
Phase Current Unbalance, Neutral Current Unbalance protection and phase & negative sequence current directional.
Bank phase overvoltage
Negative sequence over voltage
User programmable logics for custom schemes
Automatic Voltage Regulator (AVR) for switching capacitor banks based on voltage, power factor and reactive power
Time and Date function allowing capacitor bank switching based on time of day, week and seasons.
Capacitor control supervision block for processing commands from SCADA, remote
C70 provides Sensitive protection functions designed specifically to protect the shunt capacitor banks effectively. The C70 provides current based protection functions, which include phase, ground, and neutral instantaneous and time overcurrent elements for standard overcurrent protection of the bank. Two elements per configured CT bank are available. The C70 also provides breaker failure protections and standard voltage based protection functions. Apart from the standard current and voltage based functions the C70 comes with protection functions specifically designed to provide sensitive protection for capacitor banks in a single box.
Metering - current, voltage, power, energy, frequency
Oscillography – analog and digital parameters at 64 samples/cycle
Event Recorder - 1024 time tagged events with 0.5ms scan of digital inputs
Data Logger - 16 channels with sampling rate up to 1 sample / cycle
Advanced relay health diagnostics
Setting Security Audit Trail for tracking changes to C70
The C70 includes high accuracy metering and recording for all AC signals. Voltage, current, and power metering are built into the relay as a standard feature. Current and voltage parameters are available as total RMS magnitude, and as fundamental frequency magnitude and angle.
Analyze capacitor bank faults using both analog and digital power system quantities that are measured and recorded up to a rate of 64 samples per cycle.
The C70 incorporates advanced automation features including powerful FlexLogic™ programmable logic, communication, and SCADA capabilities that far surpass what is found in the average capacitor bank relay. The C70 integrates seamlessly with other UR relays for complete system protection.
Flexlogic™ allows for customizing the C70 outputs for capacitor bank protection schemes and applications.
Multiple Protocols - IEC61850, DNP 3.0 Level 2, Modbus RTU, Modbus TCP/IP, IEC60870-5-104, Ethernet Global Data (EGD)
Direct I/O – secure, high-speed exchange of data between URs for Direct Transfer Trip and pilot-Aided schemes
Embedded Managed Ethernet Switch with 4 - 100 Mbit Fiber optic ports and 2 copper ports
The C70 provides advanced commun-ications technologies for remote data and engineering access, making it easy and flexible to use and integrate into new and existing infrastructures. Direct support for fiber optic Ethernet provides high-bandwidth communications allowing for low-latency controls and high-speed file transfers of relay fault and event record information. The available redundant Ethernet option and the embedded managed Ethernet switch provide the means of creating fault tolerant communication architectures in an easy, cost-effective manner without the need for intermediary communication hardware.
The C70 supports the most popular industry standard protocols enabling easy, direct integration into DCS and SCADA systems.
IEC 61850
DNP 3.0
Ethernet Global Data (EGD)
IEC 60870-5-104
Modbus RTU, Modbus TCP/IP
In addition to providing high-speed connectivity directly to your Universal Relay, the MultiLink UR Switch module provides an additional 4 Fiber Ethernet ports, for connection to other relays in the system as well as upstream connectivity. It also provides 2 RJ-45 copper Ethernet ports which can be used to connect local devices such as PCs, meters, or virtually anything else in the system.
The UR Switch provides a simple way to add fully-managed Ethernet networking to your relays and devices without the need for additional hardware or a dedicated communications cabinet.
The UR Switch includes all the management and features that come with all MultiLink managed switches, and can be easily integrated into a network that has other Ethernet switches.
When used in a ring topology with other UR switch modules or MultiLink switches, the UR Switch can be configured to use MultiLink’s Smart RSTP feature to provide industry-leading network recovery for ring topologies, at a speed of less than 5ms per switch. Learn More
Use the C70 with integrated IEC 61850 to lower costs associated with generator protection, control and automation. GE’s leadership in
IEC 61850 comes from thousands of installed devices and follows on years of development experience with UCA 2.0.
The C70’s IEC 61850 Process Bus module is designed to interface with the Multilin HardFiber System, allowing bi-directional IEC 61850 fiber optic communications. The HardFiber System is designed to integrate seamlessly with the existing Universal Relay applications, including protection functions, FlexLogic, metering and communications. Learn More
The EnerVista™ Suite is an industry-leading set of software programs that simplifies every aspect of using the C70 relay. The EnerVista™ suite provides all the tools to monitor the status of the protected asset, maintain the relay, and integrate information measured by the C70 into DCS or SCADA monitoring systems. Convenient COMTRADE and Sequence of Events viewers are an integral part of the UR Setup software included with every UR relay, to carry out postmortem event analysis to ensure proper protection system operation. Learn More
Access Control
Multilin devices and relays are designed with simple but powerful security to enable reliability and compliance for virtually any project or implementation. With support for multi-level permissions and multi-factor supervisory controls, Multilin devices can help you manage the integrity of your system during commissioning, testing, implementation, and beyond.
The UR Family provides separate authentication for settings and commands to the system. In addition, as discrete authentications for local and remote access, it also provides a supervisory control factor that can lock or unlock a device for configuration changes and other modifications.
Intrusion Detection
Multilin’s family of protection and control products can also help enable your security perimeter and intrusion detection programs. By providing essential alarming and logging of critical events, Multilin devices can help you detect potential breaches within your system and allow you to respond quickly and effectively. Specifically, unsuccessful access attempts are logged, alarmed, and lead to potential attackers being locked out. This ensures the reliability of your system during questionable activity.control factor that can lock or unlock a device for configuration changes and other modifications.
Auditing and Reporting
With the Security Audit Trail reporting feature and support for Event logging of key
activities such as configuration changes, Multilin devices can help ensure device and
protection system integrity, and perform forensic auditing of activities and changes
for compliance.
Fully Compatible with GE's Multlilin HardFiber System
- Provides support for GE's
IEC 61850 HardFiber Process Bus Solution:
- Complete IEC 61850 Process Bus Solution providing resource optimization and minimizing total P&C lifecycle costs. Learn More
Ambient Temperature Monitoring:
- Provides alarms when the ambient temperature exceeds hot extreme
Security Enhancements - Enabling NERC CIP compliance:
- Dual Permission access requiring live permission from both the user and from SCADA operators before settings can be changed or commands can be given to the relay
- Logging of user commands in the security audit trail relay - creates a record and sequence of events for troubleshooting and security auditing
New and Enhanced IEC61850 services (FW version 5.90)
- New user-configurable buffered report control block
- Extended GOOSE subscription functionality, up to 16 remote devices
New and Enhanced Protection and Control Functionality (FW version 5.90)
- New Thermal overload element
Protection & Control 
