Description

RWK-381 line sectionalizing load break switch controller is a kind of switch which must cooperate with superior switch. It can’t cut off the fault current, it only trip when the line is low-voltage or no-current.

RWK-381 line sectionalizing load break switch controller adopts IT operation mode. When a fault happed, the controller will record the fault times. If the times come to the setting value, the controller will trip after the line is low-voltage or no-current.

The controlling box is made of stainless steel, the surface is dealt with painting, anticorrosion, can be used in outdoor environments.

It has charging circuit: It could take AC220V charging power supply from outside. If there is no power supply outside, it also could achieve opening/closing operation and all controller functions with battery. Besides that, it is set with anti-over discharge circuit for protecting the battery when there is no electricity of the power supply outside for a long time.

Main function introduction

1. Protection relay functions:

1) Section function,

2) 50 Instantaneous/Definite-Time Overcurrent (P.OC),

3) 51 Phase Time-Overcurrent (P.OC2/P.OC3),

4) 49 Overload

5) 50N Residual Ground Instantaneous/Definite-Time Overcurrent(G.OC),

6) 51N Residual Ground Instantaneous/Definite-Time Overcurrent (G.OC2 /G. OC3) ,

7) 50SEF Sensitive Earth Fault (SEF),

8) 51C Cold Load,

9) TRSOTF Switch-Onto-Fault (SOTF)

10) 27 Under Voltage (L.Under volt) ,

11) 59 Over Voltage (L.Over volt),

2. Supervision functions:

1) 74T/CCS Trip & Close Circuit Supervision,

2) 60VTS VT Supervision  .

3. Control functions: 

1) 60VTS Lockout , 

2) circuit-breaker control.

4. Monitoring Functions: 

1) Primary/Secondary Phases and Earth Currents,

2) Direction,

3) Primary/Secondary Line and Phase Voltages,

4) Apparent Power and Power Factor, 

5) Real and Reactive Power, 

6) Positive Phase Sequence Voltage,

7) Negative Phase Sequence Voltage & Current,

8) Zero Phase Sequence Voltage,

9) Earth Current With 3RD Harmonics,

10) Frequency,

11) Binary Input/Output status,

12) Trip circuit healthy/failure,

13) Time and date,

14) Event records

15) Counters,

16) Wear.

5. Communication functions:

a. Communication interface: RS485X1,RJ45X1

b. Communication protocol: IEC60870-5-101; IEC60870-5-104; DNP3.0;  Modbus-RTU

c. PC software: RWK381HB-V2.1.3,The address of the information body can be edited and queried by PC software,

d. SCADA system: SCADA systems that support the four protocols shown in "b.”.

6. Data Storage functions:

1) Event Records,

2) Fault Records,

3) Measurands.

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

Technology parameters

Device structure

About customization

The following optional functions are available: cabinet heating defrosting device, battery upgrade to lithium battery or other storage equipment, GPRS communication module,1~2 signal indicators,1~4 protection pressure plates, the second voltage transformer, custom aviation socket signal definition.

For detailed customization, please contact the salesman.

Q: What is line sectionalizing load break switch?

A:line sectionalizing load break switch is an important device used in power lines. Its main function is to segment the line according to certain rules. The advantage of this is that when a certain segment of the line fails, the segment switch can isolate the faulty segment from the normally functioning line.

Q: How does it determine the segments?

A: The segmentation is usually determined according to the load distribution, geographical layout and power supply reliability requirements of the line. For example, in the area where the load is more concentrated, a separate segment may be divided; Or by geographical area, such as a block or an industrial area.

Q: What is the significance of line sectionalizing load break switch for power system?

A: It can improve the reliability and flexibility of the power system. When a fault occurs, it can quickly isolate the fault, reduce the scope of power outage, so that power maintenance personnel can be more targeted to troubleshoot the fault, and other unaffected segments can continue to supply power normally, ensuring that