Micrologic control units 2.0 A, 5.0 A, 6.0 A and 7.0 A

1 Micrologic control A, A, A and ALow Voltage ProductsUser manualWe do more with ASchneider Electric1 Discovering your control unit2 Identifying your control unit2 Overview of functions4 Setting your control unit10 Selecting the type of neutral protection10 Setting procedure11 Setting the Micrologic A control unit12 Setting the Micrologic A control unit13 Setting the Micrologic A control unit14 Setting the Micrologic A control unit15 Fault and status indications16 Resetting the fault indicationsand checking battery status16 Testing the ground-faultand earth-leakage functions17 Menus18 Accessing the menus18 Measuring phase currents19 Displaying the maximum current values20 Resetting the maximum current values21 Viewing the settings22 Setting up the Modbus communications option23 Technical appendix24 Tripping curves24 Changing the long-time rating plug26 Zone selective interlocking (ZSI)27 Digital display28 Thermal memory29 Micrologic control A, A, A and AMicrologic ASchneider Electric2 Discovering yourcontrol unitE51384AE51450 AAll Compact NS800-3200 and MasterpactNT and NW circuit breakers are equippedwith a Micrologic control unitthat can be changed on units are designed to protectpower circuits and connected your control unitDesignationsE51352AX: type of protectionc 2 for basic protectionc 5 for selective protectionc 6 for selective + ground-fault protectionc 7 for selective + earth-leakage protectionY: version numberidentification of the control -unit generation.

2 "0" signifies the first : type of measurementc A for "ammeter"c P for "power meter"c H for "harmonic meter"c no indication: no measurementsMicrologic A: basic protection and ammeterLong time + InstantaneousMicrologic A: selective protection and ammeterLong time + Short time + InstantaneousE51385AE51354A0 IrIsdIt0 IrItIiIsdMicrologic A: selective + ground-fault protection andammeterE51387AE51354AE51395A0 IrItIiIsdLong time + Short time+ InstantaneousGround-fault protectionMicrologic A: selective + earth-leakage protection andammeterE51388BE51354AE51452A0 IrItIiIsdLong time + Short time+ InstantaneousEarth-leakage protectionMicrologic AYXZM icrologic A40100%%menulong (s)at 6 Ir24x A40100%%menudelayshort timetsd(s)long timealarmtr(s) 6 Ir24x ix A40100%%menudelayshort timeon timealarmground (s)at 6 Ir24x (s)x In368101215off2 BCDEFGHIIgAon (s). i0 ItI2t offI2t onIgMicrologic A40100%% timeofflong timealarmsettingearth Intr(s).

3 51248121620at 6 Ir24x (s)on n800 I60140230350instantaneousI i0 ItI nMicrologic ASchneider Electric31top fastener2bottom fastener3protective cover4cover opening point5lead-seal fixture for protective cover6long-time rating plug7screw for long-time rating plug8connection with circuit breaker9infrared link with communications interfaces10terminal block for external connections11housing for battery12digital display13three-phase bargraph and ammeterAdjustment dials14long-time current setting Ir15long-time tripping delay tr16short-time pickup Isd17short-time tripping delay tsd18instantaneous pick-up Isd19instantaneous pick-up Ii20ground-fault pick-up Ig21ground-fault tripping delay tg22earth-leakage pick-up I n23earth-leakage tripping delay tIndications24 LED indicating long-time tripping25 LED indicating short-time tripping26 LED indicating ground-faultor earth-leakage tripping27 LED indicating auto-protection tripping28

4 LED indicating an overloadNavigation29navigation button to change menus30navigation button to view menu contents31button for fault-trip reset and battery testTest32test button for ground-fault and earth-leakageprotection33test connectorPresentationE51389BE51390AE5139 1 BMicrologic AMicrologic AMicrologic AE51394AE51393 AMicrologic timealarmIrtr(s)x Inat 6 Ir1112 Micrologic A40100%%menu3113302976489instantaneouslo ng (s)at 6 Ir24x A40100%%menudelayshort timeI ilong timealarmtest800earth leakage12357102030 I(ms) n(A)settingx (s)at 6 In2915141716232230287193331121327262524t sd(s)on timeI itsd(s)long (s)at 6 Ir24x timeI itsd(s)on timealarmIrx Inground faultBCDEFGHIIgtg(s)on (s)at 6 Ir24settingx In3468101215offtestinstantaneous15141716 21202871932332 Micrologic ASchneider Electric4 Discovering yourcontrol unitProtection settingsDepending on the type of installation, it is possible to set the tripping curve of yourcontrol unit using the parameters presented protectionThe long-time protection function protects cables (phases and neutral)against overloads.

5 This function is based on true rms memoryThe thermal memory continuously accounts for the amount of heat in the cables,both before and after tripping, whatever the value of the current (presence ofan overload or not). The thermal memory optimises the long-time protectionfunction of the circuit breaker by taking into account the temperature rise in thecables. The thermal memory assumes a cable cooling time of approximately15 current setting Ir and standard tripping delay trE51358 AOverview of functionsCurrent protectionMicrologic A1. current setting Ir (long time)2. tripping delay tr (long time) for 6 x Ir3. pick-up Isd (instantaneous) Micrologic control A, A, A and Acurrent settingIr = In (*) x .. betweenother ranges or disable by changing rating and x Irtime delay (s)tr at x Ir0 to -30% at 6 x Ir0 to -20% at x Ir0 to -20% * In: circuit breaker ratingSetting accuracy of the Ir setting may be enhanced by using a different long-timerating the technical appendix "Changing the long-time rating plug".

6 0 IrIsdIt123E51359 AMicrologic A, A, A123450 IrIsdItIiI2t offI2t onE51386AE51396 AMicrologic AMicrologic A1. current setting Ir(long time)2. tripping delay tr(long time) for 6 x Ir3. pick-up Isd (short time)4. tripping delay tsd(short time)5. pick-up Ii(instantaneous)1. pick-up Ig (groundfault)2. tripping delay tg(ground fault)1. pick-up I n(earth leakage)2. tripping delay t(earth leakage)0It12I2t offI2t onIg0 ItI n12 Micrologic ASchneider Electric5 Short-time protectionc the short-time protection function protects the distribution system againstimpedant short-circuitsc the short-time tripping delay can be used to ensure discrimination with adownstream circuit breakerc this function carries out true rms the I2t ON and I2t OFF options enhance discrimination with downstreamprotection devicesc use of I2t curves with short-time protection:v I2t OFF selected: the protection function implements a constant time curve;v I2t ON selected: the protection function implements an I2t inverse-timecurve up to 10 Ir.

7 Above 10 Ir, the time curve is zone selective interlocking (ZSI)The short-time and ground-fault protection functions enable time discriminationby delaying the upstream devices to provide the downstream devices the timerequired to clear the fault. Zone selective interlocking can be used to obtain totaldiscrimination between circuit breakers using external pick-up Isd and tripping delay tsdMicrologic control A, A, A and Apick-upIsd = Ir x .. accuracy 10 % delaysettings I2t (ms) at 10 IrI2t ON ortsd (max resettable time)2080140230350I2t OFFtsd (max break time)80140200320500 Instantaneous protectionc the instantaneous-protection function protects the distribution systemagainst solid short-circuits. Contrary to the short-time protection function,the tripping delay for instantaneous protection is not tripping order is sent to the circuit breaker as soon as current exceedsthe set value, with a fixed time delay of 20 this function carries out true rms pick-up IsdMicrologic control Apick-upIsd = Ir x.

8 Accuracy 10 % pick-up IiMicrologic control A, A and Apick-upli = In (*) x .. accuracy 10 %23468101215 OFF* In: circuit-breaker ratingFor the characteristics and external wiringof the zone selective interlocking function,see the technical appendix on"Zone selective interlocking".The portable test kit can be used to testthe wiring between circuit breakersfor the zone selective interlocking ASchneider Electric6 Discovering yourcontrol unitProtection of the fourth pole on four-pole circuit breakersProtection of the neutral conductor depends on the distribution are three of unprotectedThe distribution system does not require protectionof the neutral protectionThe cross-sectional area of the neutral conductorat Inis half that of the phase the long-time current setting Ir for the neutral is equalto half the setting valuec the short-time pick-up Isd for the neutral is equalto half the setting valuec the instantaneous pick-up Isd ( Micrologic A)for the neutral is equal to half the setting valuec the instantaneous pick-up Ii ( Micrologic A / A A)

9 For the neutral is equal to the setting protectionThe cross-sectional area of the neutral conductor is equalat Into that of the phase the long-time current setting Ir for the neutral is equalto the setting valuec the short-time pick-up Isd for the neutral is equal tothe setting valuec the instantaneous pick-ups Isd and Ii for the neutralare equal to the setting of functionsCurrent protectionGround-fault protection on Micrologic Ac an ground fault in the protection conductors can provoke local temperature riseat the site of the fault or in the purpose of the ground-fault protection function is to eliminate this type of there are two types of ground-fault the function determines the zero-phase sequencecurrent, the vectorial sum of the phase and neutralcurrentsc it detects faults downstream of the circuit Ground Returnc using a special external sensor, this functiondirectly measures the fault current returningto the transformer via the earth cablec it detects faults both upstream and downstreamof the circuit breakerc the maximum distance between the sensorand the circuit breaker is ten ground-fault and neutral protection are independent and can therefore pick-up Ig and tripping delay tgThe pick-up and tripping-delay values can be set independently and are identicalfor both the residual and "source ground return" ground-fault protection control Apick-upIg = In (*) x.

10 Accuracy 10 %ABCDEFGHIIn 400 A < In 1200 > 1200 A500 A 640 A 720 A 800 A 880 A 960 A 1040 A1120 A1200 Atime delaysettings I2t (ms) at 10 In (*)I2t ON ortg (max resettable time)2080140230350I2t OFFtg (max break time)80140200320500* In: circuit-breaker ratingNeutral protection for three-pole devicesNeutral protection is not available on three-pole ASchneider Electric7 Current protection and alarmsEarth-leakage protection on Micrologic Ac the earth-leakage protection function primarily protects people against indirectcontact because an earth-leakage current can provoke an increase in the potentialof the exposed conductive parts. The earth-leakage pick-up value I n is displayeddirectly in amperes and the tripping delay follows a constant-time curvec an external rectangular sensor is required for this functionc this function is inoperative if the long-time rating plug is not installedc dprotected against nuisance kDC-component withstand class A up to 10 value I n and tripping delay tMicrologic control Apick-upI n accuracy 0 to - 20 % delaysettings(ms) t (max resettable time)60140230350800 t (max break time)