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Multilin C60

Breaker Protection System

The C60 breaker protection system is a substation hardened controller that provides a complete integrated package for the protection, control, and monitoring of circuit breakers. The C60 supports dual-breaker busbar configurations such as breaker-and-a-half or ring bus arrangements. Signals from up to 4 sets of CT’s can be brought into the C60 for internal summation

Key Benefits

  • Complete breaker control, monitoring and integration in a single platform

  • Advanced IEC 61850 Ed. 1 and Ed. 2 certified implementation, complete settings via SCL files and IEC 61850-9-2 process bus solution ensures interoperability, device managing optimization and reduced cost of ownership

  • Routable GOOSE (R-GOOSE) enables GOOSE messages going beyond the substation, which enables wide area protection and control applications

  • Reduced wiring through the use of high-speed peer-to-peer communication for accepting trip and close commands from other relays

  • Advanced automation capabilities for providing customized protection and control solutions

  • Robust network security enabling Critical Infrastructure Protection through user command logging, and dual permission access control

  • Simplified system integration with communications supporting serial, Ethernet and multiple protocols

  • Phasor Measurement Unit (synchrophasor) according to IEEE® C37.118 (2011) and IEC® 61850-90-5 support

  • Supports latest edition of waveform capture (COMTRADE 2013) simplifying fault records management

  • Application flexibility with multiple I/O options including high density I/O, programmable logic, modularity, and specific customization

  • An integrated large, full colour display, provides real-time visualization and control of the protected bay, via a bay mimic as well as annunciator functionality and graphical visualization of phasors


  • Stand-alone breaker monitoring and control

  • Multiple breaker configuration control including breaker-and-a-half and ring bus

  • Automatic bus transfer scheme using a single device

  • As part of a distributed bay controller

Protection & Control

As part of the UR family of Protection & Control devices, the Multilin C60 Breaker Protection System offers a high degree of modularity in its design and functionality, providing superior performance while meeting the toughest
requirements of the marketplace. Advanced protection and control features of this relay includes:

Breaker Failure
The breaker failure functions included in the C60 are available to detect breaker failure conditions for both single and three-pole tripping schemes.
The C60 provides two independent breaker failure functions, and all of the current source inputs, digital inputs and digital outputs need to perform breaker failure functions on dual breaker schemes, such as breaker-and-a-half or ring bus arrangements. Breaker failure initiation and transfer tripping signals can be done using hardwired contacts or through communications
(IEC 61850 and direct I/O).

The C60 provides multi-shot autoreclosing on all types of faults for single or three-pole applications with independent dead time for each shot. The protection settings can be changed between shots (typical application
being an accelerated zone 1 extension scheme). Autoreclosure can also be dynamically blocked by user-programmable logic. Four different autoreclose modes are available, enabling users to select the reclosure mode to suit
specific applications. The autoreclose modes can be dynamically changed by any internal FlexLogic™ digital operand, allowing flexibility with changing system conditions.

The C60 provides ten synchrocheck elements that monitor voltage difference, phase angle difference and slip frequency taking the CB closing time into account to ensure proper breaker closure as per user requirements. Any of the ten synchrocheck elements can be dynamically blocked or
unblocked by other elements or user logic, allowing coordination with other C60 protection settings and groups. The C60 provides additional enhancements in synchronizing by checking dead source conditions for synchronism bypass under these conditions.

Overcurrent and Thermal Elements
Overcurrent protection is delivered through instantaneous and time overcurrent elements available for phase, neutral, ground and sensitive ground protection. Most of the standard protection curves are provided.
Thermal overload elements as per the IEC 255-8 standard are also available.

Sensitive Directional Power
Two separate directional power elements are provided to detect reverse and low forward power conditions for use in IEEE 1547 DG interconnection anti-islanding protection.

Breaker Control
The C60 allows for control of up to two breakers through commands given to it from either local or remote users. The C60 front panel can have 16 user-configurable push buttons that can be used to select and operate the breaker functions. Each button can be customized and labeled for easy operator identification. The C60 can also accept breaker operation commands from remote users through one of the many available communication protocols including Modbus, DNP 3.0, IEC 61850, and IEC 60870-5-104.

IEC 61850 Process Bus

The IEC 61850 Process Bus module is designed to interface with the GE Multilin HardFiber System, allowing bi-directional IEC 61850 fiber optic communications. The HardFiber System is designed to integrate seamlessly with existing Universal Relay (UR) applications, including protection functions, FlexLogic, metering and communications. The GE Multilin HardFiber System offers the following benefits:

  • Communicates using open standard IEC 61850 messaging

  • Drastically reduces P&C design, installation and testing labor by eliminating individual copper terminations

  • Process Bus moduletraditional CT/VT inputs with the IEC 61850 Integrates with existing C60’s by replacing

  • Does not introduce new cyber security concerns

Advanced Automation
The C60 incorporates advanced automation features including powerful FlexLogic programmable logic, communication, and SCADA capabilities that far surpass what is found in the average breaker relay or controller. The C60 integrates seamlessly with other UR relays for complete breaker management including reclosing, load shedding, and synchronism applications.

Monitoring and Metering

The C60 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.

When used in a ring topology with other UR Switch Modules or MultiLink Switches, the UR Switch Module 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. 

Interoperability with Enbedded IEC 61850

Use the G60 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 G60’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 existing Universal Relay applications, including protection functions, FlexLogic, metering and communications.

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C60 Manual

C60 Brochure

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