2-2 B30 BUS DIFFERENTIAL SYSTEM – INSTRUCTION MANUALPRODUCT DESCRIPTION CHAPTER 2: PRODUCT DESCRIPTION2the system. Events can also be programmed (via FlexLogic™ equations) to trigger oscillography data capture that can beset to record the measured parameters before and after the event for viewing on a computer. These tools significantlyreduce troubleshooting time and simplify report generation in the event of a system fault.Several options are available for communication. An RS232 port (USB port with the graphical front panel) can be used toconnect to a computer to program settings and monitor actual values. The rear RS485 port allows independent access byoperating and engineering staff. It can be connected to system computers with baud rates up to 115.2 kbps. All serial portsuse the Modbus RTU protocol. The IEC 60870-5-103 protocol is supported on the RS485 interface. Also only one of the DNP,IEC 60870-5-103, and IEC 60870-5-104 protocols can be enabled at any time on the relay. When the IEC 60870-5-103protocol is chosen, the RS485 port has a fixed even parity and the baud rate can be either 9.6 kbps or 19.2 kbps. The100Base-FX or 100Base-TX Ethernet interface provides fast, reliable communications in noisy environments. The Ethernetport supports IEC 61850, Modbus/TCP, TFTP, and PTP (according to IEEE Std. 1588-2008 or IEC 61588), and it allows accessto the relay via any standard web browser (B30 web pages). The IEC 60870-5-104 protocol is supported on the Ethernetport. The Ethernet port also supports the Parallel Redundancy Protocol (PRP) of IEC 62439-3 (clause 4, 2012) whenpurchased as an option.Secure Routable GOOSE (R-GOOSE) is supported with software options.Settings and actual values can be accessed from the front panel or EnerVista software.The B30 uses flash memory technology that allows field upgrading as new features are added. Firmware and software areupgradable.The following single-line diagram illustrates the relay functionality using American National Standards Institute (ANSI)device numbers.Table 2-1: ANSI device numbers and functions supportedDevicenumberFunction DevicenumberFunction27P Phase undervoltage 50/87 Unrestrained bus differential49 Thermal overload protection 51G Ground time overcurrent50BF Breaker failure 51N Neutral time overcurrent50DD Disturbance detector 51P Phase time overcurrent50G Ground instantaneous overcurrent 59N Neutral overvoltage50N Neutral instantaneous overcurrent 59P Phase overvoltage50P Phase instantaneous overcurrent 59X Auxiliary overvoltage50/74 CT trouble 67P Phase directional overcurrent50G Ground instantaneous overcurrent 87B Restrained bus differential
