The B90, a member of the UR Family, features integrated protection and breaker failure for re-configurable MV, HV, EHV multi-section busbars with up to 24 feeders. Use one or more B90s together to build a flexible protection system that can be engineered to meet specific application requirements. The B90 performs fast and secure low impedance bus protection with a sub-cycle tripping time of 0.75 cycles and 04 differential zones per phase.
High speed protection algorithm for enhanced stability with trip times of 0.75 power cycle
Superior CT saturation detector that operates with only 2 msec of saturation free current for enhanced through fault stability
Ambient temperature monitoring with alarming when temperature exceeds upper thresholds
Suitable for different bus configurations, scalable architecture to protect up to 24 feeders
Pre Engineered Bus protection system
Use high speed communications to reduce wiring and installation costs
Robust network security enabling Critical Infrastructure Protection through user command logging, and dual permission access control
Integrated isolator position monitoring & alarming
Single Bus, Breaker and half bus bar configurations, Double Bus and Triple Bus with and without bus couplers
Re-configurable multi-section busbar with up to 24 feeders
Multi-zone bus differential protection with restrained and unrestrained function
Fast and reliable CT saturation detection
Breaker failure protection
End fault (dead zone) protection
Check-zone functionality
CT ratio mismatch compensation
Dynamic Bus Replica
Back-up time and instantaneous overcurrent elements
Undervoltage function for supervision purposess
The B90 Bus Differential System provides fast and secure low impedance bus protection for reconfigurable LV, HV, and EHV busbars. Use one B90 to protect up to 8 feeders and use three or more B90s together in a centralized phase segregated architecture to protect up to 24 feeders. Many busbar applications such as single, double, triple, breaker-and-a-half with or without transfer bus can be protected using the B90. The B90 is ideally suited in applications where high impedance schemes were typically used. Part of the Universal Relay family, the B90 comes with a variety of versatile features truly integrating protection, monitoring, metering, communication and control in one easy-to-use device. The Universal Relay family offers higher degree of modularity in its design and functionality providing superior performance in protection and control meeting the toughest requirements of the marketplace.
Isolator monitoring (up to 48) and alarming
CT trouble monitoring
VT supervision
Metering - current, voltage, frequency
Oscillography - 64 samples/cycle, up to 64 records
Event Recorder - 1024 time tagged events, with 0.5 ms scan of digital inputs
The B90 is the single point for protection, control, metering, and monitoring in one integrated device that can easily be connected directly into DCS or SCADA monitoring and control systems like Viewpoint Monitoring as shown.
The B90 incorporates advanced automation features including powerful FlexLogic™ programmable logic, communication, and SCADA capabilities that far surpass what is found in the average bus protection relay. The B90 integrates seamlessly with other UR relays for complete system protection
Flexlogic allows for customizing the B90 outputs for most bus protection schemes and applications
Direct I/O – secure, high-speed exchange of data between URs
The B90 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 available redundant Ethernet option provides the means of creating fault tolerant communication architectures in an easy, cost-effective manner.
The B90 supports the most popular industry standard protocols enabling easy, direct integration into DCS and SCADA systems.
IEC 61850
DNP 3.0
IEC 60870-5-104
Modbus RTU, Modbus TCP/IP
The EnerVista™ Suite is an industry-leading set of software programs that simplifies every aspect of using the B90 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 B90 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.
Protection & Control 
