Toshiba GR200 Series Instruction Manual page 16

Centralized busbar protection ied

Hide thumbs Also See for GR200 Series:

Table of Contents

GRB200 is a low impedance differential relay for bus-bar protection; and it has been designed

to provide very reliable, high speed and selective protection for various types of bus-bar system.

GRB200 can be applied for various bus-bar systems:

Single bus-bars with/without transfer bus-bar

Double bus-bars with/without transfer bus-bar

Ring bus-bars with/without transfer bus-bar

One and a half bus-bar

GRB200 can detect phase and earth faults on the protected bus-bar by employing a phase

segregated current differential scheme. The maximum of 24 three-phase currents can be

acquired from feeders, sections and bus-couplers, which can correctly distinguish between

internal and external faults even in the event of CT saturation.

Circuit breaker failure protection, end zone protection and blind zone protection are

also available.

Backup overcurrent and earth fault protections are provided as options in each bay.

Configuration

Figure 1.1-1 shows the configuration for the busbar protection, which is achieved with main-

unit (MainUnit) and sub-units (SubUnit#1, SubUnit#2) operations. The MainUnit has a signal

processing module, which operates for the applications; it also operates for the control and

monitoring. The SubUnit#1 and the SubUnit#2 are reinforcement units when the MainUnit is

not able to get all signals of the busbar system; the both SubUnits will be used when a larger

system should be protected.

6F2S1931 (0.20)

Centralized GRB200

(Soft: 030, 031, 032, 033, 034)

Show Quick Links

Chapters

Table of Contents