Relays: B-PRO Bus Protection Relay Model 8700/BUS
The NxtPhase B-PRO provides bus & substation differential protection (low impedance), integrated breaker failure & overcurrent protection with metering & fault oscillography.
    Six sets of CT inputs for differential protection (18 currents) using a percentage slope characteristic for security or external faults.

    Overcurrent & breaker failure for each input current. Directional control of overcurrent functions are available. Plus, over/under bus voltage & frequency functions.

    Two separate differential zones - bus & transformer.

    High quality recording - fault recording (96 samples/cycle) & event logging.

    Metering functions for each input connection.

    Easy to use, simplified relay setting & record analysis software (Windows 9x/ME/NT/2000) included.

    Intuitive ASCII-terminal interface provides full local or remote access.

    Substation automation ready.

The B-PRO Bus Protection Relay features:
    Protection functions include IEEE devices, 87B, 27, 59, 60, 81, 87T, 50LS, 50BF, 50/51/67, 50N/51N/67, 46/50/51/67.

    ProLogic - control logic statements.

    Three communication RS-232 ports. Internal modem option.

    Direct-connect DNP3 & Modbus SCADA communication protocols (Ethernet ready).

    IRIG-B time stamping & sample synchronization.
Bus Relay
Feeder Relay
Transmission Line Relay
Transformer Relay