MiCOM P921/P922/P923 - Schneider - error

Technical GuideP92x/EN FT/H42User GuideMiCOM P921/P922/P923 Page 43/70To gain access to the “[47] NEGATIVE SEQUENCE OVERVOLTAGE” submenufrom the “PROTECTION group” menu, press followed by or until the desiredsubmenu header is displayed.PROTECTION G1 (G2)[47] NEG SEQ O/VHeading of the protection menu (group 1 or group 2). To gainaccess to the menu from the default display press followedby or until the menu is displayed.Heading of the “NEG.SEQ O/V” submenu[47] V2>=[47] V2>=NO5.0 V[47] DELAY TYPE =DMT[47] TMS=1.0[47] tRESET V2>=10 ms[47] tV2>=[47] V2>>=[47] V2>>=[47] tV2>>=40 msNO130 V40 msDescription: activation of the 1 st negative overvoltage stage(V2>)Range: YES/NONote: if disabled (« NO » selected), all the following messagesare invisible, until « V2>> » message.Description: setting of the 1st V2> stageRange: range 57-130V: 5 – 200V, step = 0.1Vrange 220-480V: 20 – 720V, step = 0.5VDescription: selection of the time delay characteristicRange: definite time (DMT) / inverse definite time (IDMT)Description: time multiplier setting.Range: 0.5 – 100, step = 0.5Note: this message only seen if “IDMT” time delay selectedDescription: reset time for the first negative overvoltage stageRange: 0 – 100s, step = 0.01sNote: this message only seen if “IDMT” time delay selectedDescription: time delay setting for a definite time curve.Range: 0 – 599s, step = 0.01sNote: this message only seen if “DMT” time delay selectedDescription: activation of the 2nd negative overvoltage stage(V2>>)Range: YES/NONote: if disabled (« NO » selected), all the following messagesare invisible, until the heading of the submenu.Description: setting of the 2nd stageRange: range 57-130V: 5 – 200V, step =0.1Vrange 220-480V: 20 – 720V, step = 0.5VDescription: time delay setting for the definite time curve.Range: 0 – 599s, step = 0.01sNote: definite time delay only for this stage2.6.5 Positive sequence undervoltage protection (MiCOM P922 and P923)The relay will trip according to an inverse characteristic or a definite timecharacteristic for the first stage and according to a definite time characteristic for thesecond stage.The inverse characteristic is given by the following formula:t = K / (1 – M)Where,K = Time Multiplier Settingt = operating time in secondsM = Applied input voltage / Relay setting voltage (Vs).