GE MiCOM P40 Agile Technical Manual

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Contents

P44x/EN ST/Hb6 Setting(ST) 4-32 MiCOM P40 Agile P442, P444Menu text Default setting Setting range Step sizeMin Maxcharacteristic.Thermal Alarm 70% 50% 100% 1%An alarm can be raised on reaching a thermal state corresponding to a percentage of thetrip threshold. A typical setting might be ‘Thermal Trip’ = 70% of thermal capacity.Time Constant 1 10 mn 1 mn 200 mn 1 mnSetting for the thermal time constant (τ1) for a single time constant characteristic, or the firsttime constant for the dual time constant characteristic.Time Constant 2 5 mn 1 mn 200 mn 1 mnSetting for the second time constant (τ2) for the dual time constant characteristic.2.11 Residual overvoltage (neutral displacement) protection (“Residual overvoltage”menu)Menu text Default setting Setting range Step sizeMin MaxGROUP 1 – RESIDUAL OVER-VOLTAGEVN Type Residual Residual, HomopolarSelect residual or homopolar voltage.VN>1 Function DT Disabled, DT, IDMTSelect the residual overvoltage stage 1 as either Inverse Definite Minimum Time (IDMT),Definite Time (DT) or disabled. The following submenus are visible according to this setting.VN>1 Voltage Setresidual:homopolar (C7.x):5 V1.5 V1 V0.5 V80 V or 180V∗60 V1 V0.5 VPick-up setting for the first stage residual overvoltage characteristic.VN>1 Time Delay 5.00 s 0 s 100.0 s 0.01 sOperating time delay setting for the first stage definite time residual overvoltage element.VN>1 TMS 1.0 0.5 100.0 0.5Setting for the Time Multiplier Setting to adjust the operating time of the IDMT characteristic.where K = Time Multiplier Setting (TMS), K = Operating time (in second) and M = measuredvoltage / relay setting voltage (V<).VN>1 tReset 0 s 0 s 100.0 s 0.5 sSetting to determine the reset/release definite time for the first stage characteristic.VN>2 Status Disabled Enabled, DisabledSetting to enable or disable the second stage definite time residual overvoltage element.VN>2 Voltage Setresidual:homopolar (C7.x):10 V3 V1 V0.5 V80 V or 180V∗60 V1 V0.5 VPick-up setting for the second stage residual overvoltage element.VN>2 Time Delay 10.00 s 0 s 100.0 s 0.01 sOperating time delay setting for the second stage residual overvoltage element.