Toshiba GR200 Series Instruction Manual page 509

Supervision of circuit breaker contacts (CB fail)
9.2.25
The auxiliary contacts of disconnector are supervised. That is, when the main contact is 'Open',
N/O and N/C contacts of the auxiliary-contact are represent as 'Open and Closed'. However, if
both N/O and N/C are represented as 'Open', the auxiliary-contact operates incorrectly.
Likewise, if both are represented as 'Closed', the auxiliary contact operates incorrectly.
Error level
(i)
Generally, the default error level has been set at level 3 (Minor error), but the user can program
the level using settings [CHK_CB:LVl], etc.; then, set On for the settings [CHK_CB:Sw] or
whatever required. The time to detect can be set using [TCBSV], which is provided in Chap.
Relay application: Contact supervision function
Error message
(ii)
When detecting an error, an error message will be shown on the LCD screen and an LED is lit.
Table 9.2-52 Error messages provided by the supervisor in CHK_CB_CBP
Message and level
CBx fail
Error level
Table 9.2-53 Detailed information in Hexadecimal in CHK_CB_CBP
Display
area
10000000: CH1
01000000: CH2
00100000: CH3
00010000: CH4
Top row
00001000: CH5
00000100: CH6
00000010: CH7
00000001: CH8
10000000: CH17
01000000: CH18
00100000: CH19
00010000: CH20
Middle row
00001000: CH21
00000100: CH22
00000010: CH23
00000001: CH24
Bottom row
Meaning of the information
Detection of the failure in the CBx
Minor error (Level 3)
Meaning of the detailed information
Left column
(No information displayed)
- 495 -
. It is reset instantly if the error is cleared.
Right column
10000000: CH9
01000000: CH10
00100000: CH11
00010000: CH12
00001000: CH13
00000100: CH14
00000010: CH15
00000001: CH16
00000001: ORed state in all CHs
(No information displayed)
Centralized GRB200
(Soft: 030, 031, 032, 033, 034)
6F2S1931 (0.20)