Toshiba GR200 Series - 10.2.18 Supervision of voltage in zero-sequence (VZ error); (i) Error level; (ii) Error message

6F2S1914 (0.49)
GRL200 (Soft 033 & 037)
- 1253 -
10.2.18 Supervision of voltage in zero-sequence (VZ error)
Voltage in zero-sequence is automatically calculated using three-phase voltages measured in
the relay. If Equation (10.2-4) is made up, the supervision function can determine that a voltage
in zero-sequence is being applied erroneously.
1.



 

 



󰇛󰇜
(10.2-4)
(i) Error level
Generally, the default error level has been set at level 3 (Minor error), but the user can program
the level using setting [CHK_VZ:LVl]; then, set On for the setting [CHK_VZ:Sw]. The time for
the detection can be set using [CHK_VZ:Timer] , which is set for 15 seconds as default. After
the error is cleared, it is reset in the time that is the same as the setting time to the detection.
(ii) Error message
When the function operates and detects error, an error message can be shown at the LED and
the LCD screen.
Table 10.2-37 Error messages provided by the supervisor in CHK_VZ
Message and level
Meaning of the information
V0 error
Detection of the zero-sequence voltage
Error level
Minor error (Level 3)
Table 10.2-38 Detailed information in Hexadecimal in CHK_VZ
Display area
Meaning of the detailed information
N/A
(No information is displayed)