Description ：

RWB-200 Series digital microcomputer protection device is suitable for low current/small resistance grounding system of 35kV and below, which integrates functions of protection、control、communication and monitor. The device uses component programmable design ideas to reduce maintenance workload and spare parts. It can flexibly meet the needs of a variety of applications, and is the ideal replacement production 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: Lockout, circuit-breaker control.

• 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：

About customization:

The following optional functions are available: Power supply at AC110V/60Hz, DC48V, DC24V.For detailed customization, please contact the salesman.

What is the function of Microcomputer protection device?

 The microcomputer protection device is mainly used to protect the electrical equipment in the switchgear. It can monitor electrical parameters such as current and voltage in real time. When there is overcurrent, overvoltage, undervoltage and other fault conditions, the rapid response, such as tripping to cut off the circuit, to prevent equipment damage, to ensure the safe and stable operation of the power system.

What are its advantages over traditional protection devices?

The precision of The microcomputer protection device is higher, and the electric quantity can be measured accurately. It has the function of self-diagnosis, can find its own fault in time for maintenance. Moreover, the protection parameters can be set flexibly to adapt to different power system requirements. It can also realize remote communication and facilitate remote monitoring and operation, which is difficult to do with traditional protection devices.