Description：

RWB-300 device digital microcomputer protections device is applicable to the small current small resistance grounding system of 3kv and below, integrating protection, control. communication, monitoring and other function8, The device uses the ides of component programmable design to reduce the maintenance workload and spare parts, which can flexibly meat the needs of a variety of applications, and is the most ideal substitute for traditional electromagnetic relay protection.

Main function introduction：

• Main protection relay functions: three stages phase-current protection, zero-sequence current protection, Negative sequence current protection, inverse-time protection, overload component, reclosing, frequency protection, undervoltage/overvoltage protection, zero sequence phase overvoltage protection, Motor start fast break protection, Negative sequence overcurrent, overheat protection.

•  Control functions: circuit-breaker control.

• Monitoring Functions: Primary currents for Phases and Zero sequence current, Primary PT Voltage, Frequency, Binary Input/Output status, Trip circuit healthy/failure, Time and date, Fault records, Event records, Switching monitoring.

• Communication functions: Using the RS485 interface of the device passing Modbus RTU Communication protocol link to ‌SCADA system; realizable Events\Faults and Measurands viewing, executing remote command, Time synchronizing, Viewing and Changing Settings

• Data Storage functions: Event Records, Fault Records, Measurands.

• remote signaling remote measuring, remote controlling function can be customized address.

Technology parameters:

Device structure:

Device terminal definition diagram:

Installation Diagram：