Type Selection ☞   154kV Transmission Line Protection Relay Panel
154kV Busbar Protection Relay Panel
345kV Transmission Line Protection Relay Panel
345kV Busbar Protection Relay Panel
345kV Breaker Failure Protection Relay Panel

Product Name :345kV Transmission Line Protection Relay Panel
Apply This is a 345kV Transmission Line Protection Digital Relay Panel, of the type of carrier and PCM transmission breaker which uses returning device for transmission of electric line and light communication device as its communication methods for protection
* 1st Main:
   Major protection method: Carrier Scheme
   Rear non-protection method: 3-level limited distance relay panel
   Equipped with extra Fault Detection elements
* 2nd Main:
   Protection method: PCM transmission breaker method
   Equipped with extra Fault Detection elements
   Complete digital numerical calculation type.
   32 bit CPU risc type, speed 60 MIPS
  | Characteristics | Component |


Characteristics
 
1st Main Protection Panel [#21: GRZ100-501Y] major function
  1) Carrier scheme function
2) 3-level distance relay elements
3) Function to detect a bad PT Fuse
4) Function to detect simultaneity

2nd Main Protection Panel [#87: GRL100-501Y] major function
  1) Electric current differential method

Common function
  1) Function to detecting troubles in high-resistance
2) Function to detecting troubles in single lines
3) Function to protect simultaneous movement
4) Automatic opening-closing function
5) Protecting excessive electric current
6) Function to save records of troubles, to analyze troubles, and to measure
7) Function to indicate trouble points
8) Function to watch ordinarily and inspect automatically
9) Equipped with time simultaneity function (IRIG-B)
10) Equipped with communication ports (RS232C, RS485) for connecting to a local PC
      and remote PC, and data analysis program Components


Component

 
1st Main Protection Panel [GRZ100-501Y]
For 345kV (1.5CB), FD function inside, opening-closing function inside / excessive
electric current rear protection function inside
Standard
AC current 5A or 1A
AC voltage 100V,110V,115V,120V
Frequency 50Hz , 60Hz
DC power supply 110Vdc / 125Vdc
(Normal range -20% and +20%)
Operating time below typical 1 cycle
2nd Main Protection Panel [GRL100-501Y]
For 345kV (1.5CB), FD function inside, opening-closing function inside / excessive
electric current rear protection function inside
Standard
AC current 5A or 1A
AC voltage 100V,110V,115V,120V
Frequency 50Hz , 60Hz
DC power supply 110Vdc / 125Vdc
(Normal range -20% and +20%)
Operating time below typical 1 cycle
Option Decision of Communication (PCM) Interface [Light Communication, Electric Communication]
Protection relay panel size [600(W) x 600(D) x 2350(H)] common 1st Main and 2nd Main