Fast Load Shed Benefits

• Fast optimal load shedding executed within 20ms
• Intelligently sheds loads to maintain system/process integrity
• Highly customizable and scalable, integrating easily into most industrial plants with new or existing EMS/SCADA
• Optional stand-alone system with local HMI for viewing dedicated system status and reports
• Suitable for small or large industrial systems without re-design

• Easy to use system where settings and priorities can be configured within seconds

   

Fast Load Shed

Conventional frequency and voltage load shedding schemes operate typically between 250ms to seconds. Contingency-based load shedding schemes are typically faster at 160 – 400 ms, depending on both system architecture and communications employed. Both these scheme types are too slow for industrial cogeneration applications such as oil and gas or manufacturing, where very fast load shedding is required for power system and critical process integrity.

Recording capability

There are three recorders available within the C90^Plus that eliminate the need for other stand-alone recording equipment. The transient recorder allows for a high sampling rate usually to capture power system faults and system transients. The disturbance recorder is used to capture longer records in order to understand issues such as voltage sags or swells. Lastly, the C90^Plus is equipped with a powerful and accurate Sequence of Event (SOE) recorder. Information for all three recorders can be accessed either through the front panel HMI or through EnerVista™ Launchpad Software.

Deterministic automation

Key Features

• HMI can show fault reports to local operators, enabling quick access to time sensitive information
• Customizable annunciator panel, capable of handling up to 288 alarms using a pallet of 16 colors
• Front panel display of results from the self-tests performed, allowing easy maintenance and viewing of critical indications
• Access product information, such as IP addresses and serial numbers, without the need to connect to the unit
• Increase network availability by reducing failover time to zero through IEC62439-3 “PRP” support
• IP addresses and serial numbers of each module are also accessible without the need to connect to the unit
• Full color customizable local HMI allowing easy and secure control
• HMI-equipped with pre-built screens or configurable to display any single diagram
• Reliable communication card with automatic failover and extremely fast redundant schemes
• Inter-relay communication card enables implementation of pilot schemes based on standard communication protocols
• Both “Direct” and “Teleprotection” I/O elements

Advanced communications

The C90^Plus provides for secure remote data and engineering access, making it easy and flexible to use and integrate into new and existing infrastructures. 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 availability of three independently configurable Ethernet options provide the means to create fault tolerant communication architectures in an easy, cost-effective manner. The C90^Plus supports the most popular industry standard protocols enabling easy, direct integration into SCADA systems.

• IEC 61850
• DNP 3.0
• Ethernet Global Data (EGD)
• IEC 60870-5-104
• Modbus RTU, Modbus TCP/IP
• PRP as per IEC 62439-3

Enervista software

The EnerVista™ suite is an industry-leading set of software programs that simplifies every aspect of using the C90^Plus 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 C90^Plus 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 and ensure proper protection system operation. Learn More

Security - enabling NERC CIP compliance

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 and UR^Plus families provide separate authentication for settings and commands to the system. In addition, as discrete authentications for local and remote access they also provide 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, and a control factor that can lock or unlock a device for configuration changes and other modifications.

The B95^Plus bus protection relay system provides robust and reliable protection for all bus protection applications. Highlights of the protection functions related to bus protection include:

• Multi-zone differential protection with both restrained (dual-slope percent or biased) and unrestrained (unbiased or instantaneous) functions incorporated.
• Differential protection is fast (typical response time: 1 power system cycle) and secure. Security is achieved by using a fast and reliable CT saturation detection algorithm and a phase comparison operating principle. Security is further enhanced by support for redundant process interface units (Bricks). Supports both three-phase tripping and individual phase tripping.
• Dynamic bus replica functionality and multi-zone protection (up to 6 zones) is supported allowing application of the B95^Plus to multi-section reconfigurable buses. A zone expansion/contraction to an open breaker feature is included. Isolator position monitoring for up to 48 isolators.
• Check-zone functionality configured by programming one of the differential zones to enclose the entire bus.
• Additional bus protection functions including end fault protection, breaker fail and overcurrent protection for each bus source, CT trouble monitoring for each bus zone.

Multilin B95^Plus Functional Block Diagram

• Reconfigurable multi-section bus bar with up to 24 feeders
• Retrofit and greenfield installations for power generation, transmission and distribution systems
• Reconfigurable bus bars for single bus, breaker-and-a-half and double bus with and without bus couplers
• Air-insulated and GIS stations

Standardize on the B95^Plus for Any Bus Configuration

The B95^Plus can be applied on a multitude of bus configurations due to the distributed architecture, and includes support for up to 6 zones of bus differential protection and support for up to 24 bus sources. The physical connection and wiring architecture for the B95^Plus system will be identical for any bus configuration: Bricks installed to acquire measurements and equipment status, with the B95^Plus unit connected to Bricks via fiber optic cables. The relay panel design will be identical for all applications, for all bus configurations. The only difference from application to application is the number and location of Bricks, and the programming of the B95^Plus unit.

Some typical bus configurations that can be protected by the B95^Plus:

Quickly Expand Protection through Process Bus

The B95^Plus Bus Protection System is intended to operate as a standalone, distributed bus protection system. The bay units for this system are Bricks, part of the HardFiber IEC 61850 process bus solution. Once the Bricks for the B95^Plus are installed process bus data is available for use for any other zone of protection. The Bricks, then, are a distributed I/O interface for all protection functions and zones, not just the B95^Plus. With the B95^Plus in place, installing line protection or feeder protection is a simple process: mount the relays in a panel, and patch to the fiber optic cable from the appropriate Bricks. The only requirement is the relays must implement the appropriate IEC 61850 datasets to interface successfully with the Bricks. All members of the Universal Relay family have the ability to interface with Bricks.

Well suited for both new and existing applications

As a stand-alone unit, the Multilin A60 relay is DIN rail mountable and should be mounted inside the control cabinet of the medium voltage switchgear or motor control center. Sensors should be installed where there is a high probability of an arc flash occurring. 

As the Multilin A60 utilizes both light and pressure to detect an arc flash condition, installation and wiring of external CT's are not required. An external current supervision from a separate Instantaneous Over Current (IOC) device may be used and connected as a contact input for enhanced security and mitigation of nuisance tripping. 

Calibrating & testing

 The Multilin A60 provides an auto-calibration function for the sensors reducing total commissioning and testing time. Once installed and powered, the device will first run in calibration mode. This mode, sets the thresholds for both the light and pressurized sound based on surrounding or ambient conditions. As surrounding conditions may change, the Multilin A60 may be re-calibrated at anytime. 

Control panel interface

This figure shows the typical wiring diagram of the Multilin A60 Arc Flash System. The typical wiring diagram shows the connection of the input and output relays and the connected sources. The wiring diagram also shows the connection of the supervisory circuit (option) to the A60 unit. 

This application example below describes the ability of the Multilin A60 to be deployed in a cascading configuration across multiple MV switchgear sections and compartments, including through a substation bus bar vault. The Multilin A60 sensors should be installed at a certain distance from each other to ensure coverage of the entire bus bar. 

By connecting devices together using the transfer trip input/output, individual Multilin A60 devices may receive a transfer trip signal from an upstream or downstream device, ensuring fast, reliable detection of an arc flash event in large MV switchgear applications. 

Protection & Control

The 850R provides secure and reliable protection & autoreclose functionality by offering a comprehensive range of standard and advanced protection and control elements. The controller provides directional and non-directional overcurrent protection along with the option of single-phase tripping and reclosing. Additionally, voltage and frequency protection elements may be used to disconnect Distributed Energy Resources (DER).

Multilin 850R feeder protection relay functional block diagram

The 850 provides advanced communications 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 provide s high-bandwidth communications, allowing for low-latency controls and high-speed file transfers of relay fault and event record information. The 850 also supports two independent IP addresses, providing high flexibility for the most challenging of communication networks.

Coil Circuit Supervision

The driving electronics board checks the coil connection continuity of the trip/close circuit, as well as the leakage current to ground. When magnitude of any phase current falls below the undercurrent trip pickup level for the time specified by the undercurrent trip delay. The alarm and trip pickup levels should be set lower than the lowest feeder loading during normal operations.

Capacitor Voltage Alarm

The Capacitor Voltage Alarm function defines the low voltage alarm for the internal/external capacitor charging power supply circuit. This rated voltage is used for charging the external capacitors that open and close the single-pole of the recloser. If the measured voltage of the capacitors is less than the configured percentage of the rated voltage, then the Cap Volt OP operand is generated. In addition, to prevent the charger from damage due to overloading or load short faults created by incorrect wiring, bad capacitors, or hardware failures, the 850R automatically turns off the capacitor charger to prevent damage.

Recloser Wear and Recloser/OHSW Health Monitoring

The 850R relay provides recloser/OHSW health information by monitoring and analyzing the operation count, arcing energy of breaking current, arcing time, opening time, and closing time when applicable. The recloser health status depends on many factors, such as permissible operation number, magnitude of breaking current, mechanical wear and contact wear.

Time of Day Timer

The Time of Day Timer function provides the user with the ability to program control actions based on real time. There are two identical Time of Day Timers.

Application

Monitoring of the total accumulated energy/accumulated demand/minimum and maximum power demand at the end of an event or a shift interval. A shift can be defined by the breaker status operand (opclosed) or operand derived from the Time of Day Timer element.

Voltage Disturbance

The Voltage disturbance function of Voltage Swell and Voltage Sag, as described in IEEE 1159-2009. When the voltage on any phase drops below this level a voltage sag condition occurs. Voltage sags are usually associated with system faults but can also be caused by switching heavy loads or starting large motors. Short duration voltage sag may cause process disruptions. Voltage swells are usually associated with system fault conditions, but they are much less common than voltage sags. An SLG fault on the system can cause a swell to occur, resulting in a temporary voltage rise on the healthy phases. Swells can also be caused by switching off a large load, load shedding, or switching on a large capacitor bank. Voltage swell may cause failure of the components depending upon the magnitude and frequency of occurrence.

Software and Configuration

The EnerVista™ suite is an industry-leading set of software programs that simplifies every aspect of using the Multilin 8 Series. EnerVista provides all the tools to monitor the status of the protected asset, maintain the device and integrate the information measured by the Multilin 8 Series, into SCADA or DCS process control systems. The ability to easily view sequence of events is an integral part of the setup software, as postmortem event analysis is critical to proper system management.

EnerVista Launchpad

EnerVista Launchpad is a powerful software package that provides users with all the setup and support tools needed for configuring and maintaining Multilin products. The setup tools within Launchpad allow for the configuration of devices in real-time, by communicating via serial, Ethernet or modem connections, or offline by creating device setting files to be sent to devices at a later time. Included in Launchpad is a document archiving and management system that ensures critical documentation is up-to-date and available when needed.

8 Series Setup Software

8 Series Setup Software is a single setup and configuration across the platform and can reduce device setup and configuration time.