User manual 09/2009 - Schneider Electric

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The Metering FunctionMeasuring the Current and Voltage Phase UnbalancesMicrologic trip units calculate the current unbalance for each phase (3 values).The current unbalance is expressed as a % compared to the average current:I1- Iavg I2 - Iavg I3 - Iavg< 0 > 0 < 0I1 I2 I3 IavgMicrologic trip units calculate the:• Phase-to-phase voltage unbalance for each phase (3 values)• Phase-to-neutral (if present) voltage unbalance for each phase (3 values)The voltage unbalance is expressed as a % compared to the average value of the electrical quantity(Vavg):U12 - Vavg U23 - Vavg U31- Vavg> 0 < 0 < 0U12 U23 U31 VavgNOTE: The unbalance values are signed (relative values expressed as a %).The maximum/minimum unbalance values are absolute values expressed as a %.Maximum/Minimum ValuesThe Micrologic A trip unit determines in real time the maximum (MAX) and minimum (MIN) value of thecurrent for each phase reached for the current period (1)(2).The Micrologic E trip unit determines in real time the maximum (MAX) and minimum (MIN) value reachedby the following electrical quantities organized in groups for the current period (1). The groups of electricalquantities measured in real time are:• Current (2): Phase and neutral currents, average currents and current unbalances• Voltage: Phase-to-phase and phase-to-neutral voltages, average voltages and voltage unbalances• Power: Total power and power for each phase (active, reactive, apparent, and distortion)• Total harmonic distortion: The total harmonic distortion THD for both current and voltage• Frequency(1) The current period for a group is initialized by the last reset of one the maximum values in the group(see below).(2) Micrologic A and E trip units also determine the maximum value (MAXMAX) of the maximum (MAX)values and the minimum (MINMIN) value of the minimum values (MIN) of the phase currents.76 LV434104 09/2009
The Metering FunctionResetting Maximum/Minimum ValuesThe maximum and minimum values in a group can be reset for the group via the communication optionor on the front display module FDM121.The maximum and minimum values in a group can be reset on the keypad via the menu (see PeakDemand Values Reset, page 22) for the following groups:• Currents• Voltages• PowersOnly the maximum values are displayed, but both the maximum and minimum values are reset.LV434104 09/2009 77
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Low voltage electrical distribution
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Table of ContentsSafety Information
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Safety Information§Important Infor
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About the BookAt a GlanceDocument S
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Using Micrologic Trip UnitsLV434103
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Using Micrologic Trip UnitsIntegrat
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Using Micrologic Trip UnitsDescript
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Using Micrologic Trip UnitsKeypadTh
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Using Micrologic Trip UnitsScreensa
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Using Micrologic Trip UnitsEnergy M
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Using Micrologic Trip UnitsProtecti
Page 25 and 26: Using Micrologic Trip UnitsExample
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Page 31 and 32: Using Micrologic Trip UnitsMicrolog
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Page 35 and 36: The Protection FunctionLV434103 09/
Page 37 and 38: The Protection FunctionElectrical D
Page 39 and 40: The Protection FunctionProtection F
Page 41 and 42: The Protection FunctionIr Pick-Up S
Page 43 and 44: The Protection FunctionShort Time P
Page 45 and 46: The Protection FunctionInstantaneou
Page 47 and 48: The Protection FunctionIg Pick-Up S
Page 49 and 50: The Protection FunctionOperating Pr
Page 51 and 52: The Protection FunctionZSI Function
Page 53 and 54: The Protection FunctionCharacterist
Page 55 and 56: The Protection FunctionProtection f
Page 57 and 58: The Protection FunctionAdditional P
Page 59 and 60: The Protection FunctionLong Time Pr
Page 61 and 62: The Protection FunctionThermal Memo
Page 63 and 64: The Protection FunctionInstantaneou
Page 65 and 66: The Protection FunctionIg Pick-Up S
Page 67 and 68: The Protection FunctionOperating Pr
Page 69 and 70: The Protection Functiontjam Time De
Page 71 and 72: The Protection FunctionLong Start M
Page 73 and 74: The Metering FunctionLV434103 09/20
Page 75: The Metering FunctionReal-Time Meas
Page 79 and 80: The Metering FunctionSynchronized M
Page 81 and 82: The Metering Function3-Pole Circuit
Page 83 and 84: The Metering FunctionPower Calculat
Page 85 and 86: The Metering FunctionEnergy Meterin
Page 87 and 88: The Metering FunctionHarmonic Curre
Page 89 and 90: The Metering FunctionMetering Energ
Page 91 and 92: The Metering FunctionPower factor P
Page 93 and 94: The Metering FunctionManagement of
Page 95 and 96: The Metering Function3.2 Measuremen
Page 97 and 98: The Metering FunctionMicrologic A -
Page 99 and 100: The Metering FunctionVoltage Unbala
Page 101 and 102: The Metering FunctionOperating Indi
Page 103 and 104: The Metering FunctionMicrologic E -
Page 105 and 106: AlarmsLV434103 09/2009Alarms4AimThi
Page 107 and 108: AlarmsAlarm on Superiority Conditio
Page 109 and 110: AlarmsAlarms on a Trip, Failure and
Page 111 and 112: AlarmsUser-Defined Alarms (Microlog
Page 113 and 114: AlarmsAlarms on a Trip EventLabel C
Page 115 and 116: AlarmsOperation in Open or Closed F
Page 117 and 118: The RSU Parameter Setting SoftwareL
Page 119 and 120: The RSU Parameter Setting SoftwareU
Page 121 and 122: The RSU Parameter Setting SoftwareP
Page 123 and 124: The RSU Parameter Setting SoftwareM
Page 125 and 126: The RSU Parameter Setting SoftwareA
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The RSU Parameter Setting SoftwareS
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Operating AssistanceLV434103 09/200
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Operating AssistanceLocal LED Indic
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Operating AssistanceIndication on t
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Operating AssistanceIndication of F
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Operating AssistanceIndication on I
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Operating AssistanceAlarms on Equal
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Operating AssistanceInterpreting th
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Operating AssistanceThe ULP SystemD
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Operating AssistanceMain MenuPresen
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Operating AssistanceScreenDescripti
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Operating AssistanceRCU Software Fu
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Operating AssistanceCompact NSX Cir
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Operating AssistanceMaintenance Ind
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LV434103 09/2009AppendicesLV434104
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Tripping and Limitation CurvesLV434
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Tripping and Limitation CurvesTripp
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Tripping and Limitation CurvesCompa
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LV434104Micrologic 5/6 electronic t
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User manual 09/2009 - Schneider Electric

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