User manual 09/2009 - Schneider Electric

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Operating Assistance6.1 Micrologic Trip Unit IndicatorsAimThis section describes the supervision and monitoring options for an installation using the Micrologic tripunit local indicators, LEDs and LCD display.What's in this Section?This section contains the following topics:TopicPageLocal LED Indication 131Indication on the Micrologic Display 133Examples of Using Alarms 138Alarm Monitoring of the Cos ϕ and Power Factor 140130 LV434104 09/2009
Operating AssistanceLocal LED IndicationLocal Indicator LEDThe number of LEDs and their meaning depend on the type of Micrologic trip unit.Type of MicrologicDescriptionDistribution • Ready LED (green): Blinks slowly when the electronic trip unit is ready to provideprotection.• Overload pre-alarm LED (orange): Shows a steady light when the load exceeds90% of the Ir setting.• Overload alarm LED (red): Shows a steady light when the load exceeds 105% ofthe Ir setting.Motor • Ready LED (green): Blinks slowly when the electronic trip unit is ready to provideprotection.• Overload temperature alarm LED (red): Shows a steady light when the motorthermal image exceeds 95% of the Ir setting.Operation of the Ready LEDThe Ready LED (green) blinks slowly when the electronic trip unit is ready to provide protection. Itindicates that the trip unit is operating correctly.NOTE: Activation of the Ready LED is guaranteed for a value equal to the sum of the circuit breakercurrent intensities for each phase and the neutral above a limit value.This limit value is indicated above the Ready LED, on the front face of the Micrologic trip unit.The table below uses 2 examples to illustrate the comparison of the phase and neutral currents with theactivation limit value of the Ready LED:Micrologic 5.2 Trip Unit, 40 A Rating, 3-PoleMicrologic 5.3 Trip Unit, 400 A Rating, 4-PoleThe limit value is 15 A. The limit value is 50 A.This limit value can correspond, for example:• Either to the sum of the 5 A phase current intensities(3 balanced phases)• Or to 7.5 A in 2 phases (the current intensity in thethird phase is zero)• Or to 15 A in one phase if the circuit breaker (3-pole):• Is installed on a distribution with distributed neutral• Only has one loaded phase on a single-phase loadThe current intensity in the other 2 phases is zero.This limit value corresponds, for example:• Either to the sum of the three 15 A phase currentintensities and a 5 A neutral current intensity• Or to 25 A in 2 phases (the current intensity in the thirdphase and in the neutral is zero)• Or to 25 A in one phase and in the neutral (the currentintensity in the other 2 phases is zero)LV434104 09/2009 131
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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 UnitsProtecti
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Using Micrologic Trip UnitsExample
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Using Micrologic Trip UnitsExample
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Using Micrologic Trip UnitsList of
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Using Micrologic Trip UnitsMicrolog
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Using Micrologic Trip UnitsMicrolog
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The Protection FunctionLV434103 09/
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The Protection FunctionElectrical D
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The Protection FunctionProtection F
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The Protection FunctionIr Pick-Up S
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The Protection FunctionShort Time P
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The Protection FunctionInstantaneou
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The Protection FunctionIg Pick-Up S
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The Protection FunctionOperating Pr
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The Protection FunctionZSI Function
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The Protection FunctionCharacterist
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The Protection FunctionProtection f
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The Protection FunctionAdditional P
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The Protection FunctionLong Time Pr
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The Protection FunctionThermal Memo
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The Protection FunctionInstantaneou
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The Protection FunctionIg Pick-Up S
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The Protection FunctionOperating Pr
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The Protection Functiontjam Time De
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The Protection FunctionLong Start M
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The Metering FunctionLV434103 09/20
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The Metering FunctionReal-Time Meas
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The Metering FunctionResetting Maxi
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
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Page 125 and 126: The RSU Parameter Setting SoftwareA
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Page 129: Operating AssistanceLV434103 09/200
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Page 139 and 140: Operating AssistanceAlarms on Equal
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Page 143 and 144: Operating AssistanceThe ULP SystemD
Page 145 and 146: Operating AssistanceMain MenuPresen
Page 147 and 148: Operating AssistanceScreenDescripti
Page 149 and 150: Operating AssistanceRCU Software Fu
Page 151 and 152: Operating AssistanceCompact NSX Cir
Page 153 and 154: Operating AssistanceMaintenance Ind
Page 155 and 156: LV434103 09/2009AppendicesLV434104
Page 157 and 158: Tripping and Limitation CurvesLV434
Page 159 and 160: Tripping and Limitation CurvesTripp
Page 169 and 170: Tripping and Limitation CurvesCompa
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User manual 09/2009 - Schneider Electric

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