Description
| Parameter | Specification |
| Manufacturer | GE Multilin |
| Model Number | B90-N-05-H-K-H-F8N-H6D-L8N-N-67S-X-X-U67-W-7-H |
| Series | UR (Universal Relay) Series |
| Protection Type | High-Speed Sub-Cycle Bus Differential |
| Bus Configurations | Single, Double, Breaker-and-a-Half |
| Sampling Rate | 128 Samples per Cycle |
| Communication | Ethernet (IEC 61850, Modbus TCP/IP, DNP 3.0) |
| I/O Capability | Scalable Digital I/O and CT/VT Inputs |
| Redundancy | Dual-redundant Ethernet Communication Support |
| Power Supply | 88-300V DC / 88-265V AC |
The GE Multilin B90 is a high-performance, sub-cycle bus differential relay designed for the protection of substation busbars in utility and heavy industrial power systems. This specific configuration (B90N05HKHF8NH6DL8NN67SXXU67W7H) utilizes a unique distributed architecture, allowing multiple B90 units to act as a single integrated protection system for complex bus arrangements. By providing rapid fault clearance in less than 0.75 cycles, the B90 significantly reduces equipment damage and maintains system stability during severe bus faults while offering advanced automation and monitoring features.
Comparison with Similar Models
The B90 stands as the premier bus protection solution in the UR family, offering far greater flexibility than the B30 series, which is typically restricted to smaller, less complex bus configurations. While the B30 is an integrated “all-in-one” relay for up to 6 feeders, the B90’s distributed architecture can scale to protect buses with virtually an unlimited number of circuits. Compared to legacy high-impedance relays like the PVD series, the B90 provides superior security against CT saturation and eliminates the need for heavy-duty stabilizing resistors and specialized CT requirements.
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