Toshiba GR-200 Series Instruction Manual

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6F2T0200 (0.15)GRE200 (1,2)- 697 -10.2.18 Supervision of voltage in zero-sequence (VZ error)Zero-sequence-phase voltage is automatically calculated with three-phase voltages. IfEquation (10.2-4) is satisfied, the supervision function determines that zero-sequence-phasevoltage is applied erroneously.1. |Va + Vb + Vc|3 ≥ 6.35 (V) (10.2-4)(i) Error levelGenerally, the default error level has been set at level 3 (Minor error), but the user can programthe level using setting [CHK_VZ:LVl]; then, set On for the setting [CHK_VZ:Sw]. The time forthe detection can be set using [CHK_VZ:Timer] , which is set for 15 seconds as default. Afterthe error is cleared, it is reset in the time that is the same as the setting time to the detection.(ii) Error messageWhen detecting an error, the error message will be shown on the LCD screen. LED will be litup.Table 10.2-35 Error messages provided by the supervisor in CHK_VZMessage and level Meaning of the informationV0 error Detection of the zero-sequence voltageError level Minor error (Level 3)Table 10.2-36 Detailed information in Hexadecimal in CHK_VZDisplayareaMeaning of the detailed informationLeft column Right columnToprow 00000001: VZ error is existing (No information is displayed)Middlerow (No information is displayed) (No information is displayed)Bottomrow (No information is displayed) (No information is displayed)