Download Micrologic control units 2.0 A, 5.0 A, 6.0 A and 7.0 A
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Micrologic control units 2.0 A, 5.0 A, 6.0 A and 7.0 A Low Voltage Products User manual We do more with electricity. Micrologic control units 2.0 A, 5.0 A, 6.0 A and 7.0 A Discovering your control unit 2 Identifying your control unit Overview of functions 2 4 Setting your control unit 10 Selecting the type of neutral protection Setting procedure Setting the Micrologic 2.0 A control unit Setting the Micrologic 5.0 A control unit Setting the Micrologic 6.0 A control unit Setting the Micrologic 7.0 A control unit 10 11 12 13 14 15 Fault and status indications 16 Resetting the fault indications and checking battery status Testing the earth-fault and earth-leakage functions 17 Menus 18 Accessing the menus Measuring phase currents Displaying the maximum current values Resetting the maximum current values Viewing the settings 18 19 20 21 22 Technical appendix 24 Tripping curves Changing the long-time rating plug Zone selective interlocking (ZSI) Digital display Thermal memory 24 26 27 28 29 1 Micrologic A 16 Schneider Electric All Compact NS800-3200 and Masterpact NT and NW circuit breakers are equipped with a Micrologic control unit that can be changed on site. Control units are designed to protect power circuits and connected loads. Micrologic 2.0 A: basic protection and ammeter E51352A Identifying your control unit Designations E51384A Discovering your control unit Micrologic 2.0 A t 100 % 40 % menu long time Ir .6 .5 .4 x In 0 alarm tr 8 (s) 4 .9 12 16 .95 2 .98 1 20 24 1 .5 .8 .7 Ir Isd I at 6 Ir instantaneous Isd 3 4 5 2.5 2 1.5 Long time + Instantaneous 6 8 10 x Ir Micrologic 2.0 A X E51354A E51385A Micrologic 5.0 A: selective protection and ammeter Micrologic 5.0 A Y 40 % Z menu long time Ir .7 .6 .5 .4 alarm tr (s) 4 8 12 .9 16 .95 2 .98 1 20 24 1 .5 .8 x In 0 Isd 4 5 3 2.5 6 2 8 1.5 10 x Ir X: type of protection c 2 for basic protection c 5 for selective protection c 6 for selective + earth-fault protection c 7 for selective + earth-leakage protection Ir Isd Ii I at 6 Ir instantaneous short time tsd (s) .4 .4 .3 .3 .2 .1 on setting 2 I t Ii .2 .1 0 6 4 3 2 delay 8 10 12 15 off x In Long time + Short time + Instantaneous Z: type of measurement c A for "ammeter" c P for "power meter" c H for "harmonic meter" c no indication: no measurements E51354A Micrologic 6.0 A E51395A Micrologic 6.0 A: selective + earth-fault protection and ammeter E51387A t t 2 I t on 100 % 2 I t off 40 % menu long time Ir .7 .6 .5 .4 Isd alarm tr 8 (s) 4 .9 12 16 .95 2 .98 1 20 24 1 .5 .8 x In 0 at 6 Ir 3 4 5 tsd .4 .4 . 3 .2 .3 .1 .2 .1 2 0 (s) 6 8 10 2.5 2 1.5 on x Ir setting Ii 8 10 12 15 off 2 x In 6 4 3 I t delay Ig D E F G C H B I A Ir Isd Ii 0 I Ig I instantaneous short time Long time + Short time + Instantaneous test tg .4 .4 .3 .2 .3 .1 .2 .1 2 0 (s) on I t Earth-fault protection off ground fault Micrologic 7.0 A: selective + earth-leakage protection and ammeter Micrologic 7.0 A t E51452A E51354A Y: version number identification of the control-unit generation. "0" signifies the first generation. t 100 % E51388A E51450A setting t 100 % 40 % menu long time Ir .7 .6 .5 .4 .8 x In 0 alarm tr 8 (s) 4 .9 12 16 .95 2 .98 1 20 24 1 .5 Ir Isd Ii I 0 I∆n I at 6 Ir short time Isd 4 5 3 6 2.5 8 2 1.5 10 x Ir tsd .4 .4 .3 .2 .3 .1 .2 .1 2 0 Ii instantaneous (s) setting on I t off delay 6 8 4 3 2 x In 10 12 15 off test I∆n 5 7 ∆I 230 350 3 10 2 140 20 1 800 60 30 .5 Long time + Short time + Instantaneous Earth-leakage protection earth leakage 2 Micrologic A Schneider Electric E51390A top fastener bottom fastener protective cover cover opening point lead-seal fixture for protective cover long-time rating plug screw for long-time rating plug connection with circuit breaker infrared link with communications interfaces terminal block for external connections housing for battery digital display three-phase bargraph and ammeter 1 10 0A 7. logic Micro 31 12 11 13 30 7 40 % 29 alarm menu time long .8 .9 .7 .95 .6 .98 .5 1 .4 x In Ir Adjustment dials 3 8 2 Micrologic 7.0 A 14 15 Micrologic 7.0 A 31 LED indicating long-time tripping LED indicating short-time tripping LED indicating earth-fault or earth-leakage tripping LED indicating auto-protection tripping LED indicating an overload 18 tr .8 .7 .6 .5 .4 (s) 4 .9 .95 2 .98 1 1 .5 x In 8 7 alarm 12 16 20 24 at 6 Ir instantaneous Isd 3 4 5 6 8 10 2.5 2 1.5 x Ir setting 12 33 13 100 % navigation button to change menus navigation button to view menu contents button for fault-trip reset and battery test Micrologic 5.0 A 40 % 28 long time 14 14 15 Ir .7 .6 .5 .4 8 (s) 4 .9 12 16 .95 2 .98 1 20 24 1 .5 .8 x In at 6 Ir 17 on setting 3 2 1 .5 5 I t off 7 (ms) 230 10 140 20 30 60 earth leakage 23 Ii 6 8 4 3 2 10 12 15 off 19 test 32 x In delay ∆I I∆n (A) 22 .4 .4 .3 .2 .3 .1 .2 .1 2 0 (s) 8 (s) 4 .9 12 16 .95 2 .98 1 20 24 1 .5 .8 x In 7 alarm tr at 6 Ir instantaneous short time Isd 3 4 5 6 2.5 8 2 1.5 10 x Ir tsd . 4 .4 .3 .2 .3 .1 .2 .1 2 0 (s) on setting I t Ii 4 3 6 8 10 12 15 off 2 x In delay 19 instantaneous tsd Isd 3 4 5 6 2.5 8 2 10 1.5 x Ir .7 .6 .5 .4 17 7 short time 16 16 28 alarm tr Ir 15 30 menu long time test button for earth-fault and earth-leakage protection test connector 28 long time Ir 29 33 Micrologic 2.0 A 24 25 26 27 Test 32 at 6 Ir 4 Navigation 29 30 31 8 12 16 20 24 E51393A 27 28 .5 6 Indications 24 25 26 4 2 1 E51394A long-time current setting Ir long-time tripping delay tr short-time pickup Isd short-time tripping delay tsd instantaneous pick-up Isd instantaneous pick-up Ii earth-fault pick-up Ig earth-fault tripping delay tg earth-leakage pick-up I∆n earth-leakage tripping delay ∆t tr (s) 5 E51391A 14 15 16 17 18 19 20 21 22 23 9 100 % 33 350 800 Micrologic 6.0 A 33 E51392A 1 2 3 4 5 6 7 8 9 10 11 12 13 E51389A Presentation 15 14 17 16 21 20 long time Ir .7 .6 .5 .4 x In 7 at 6 Ir instantaneous short time Isd 4 5 3 2.5 6 2 8 1.5 10 x Ir tsd .4 .4 .3 .2 .3 .1 .2 .1 2 0 D C B A E on I t off delay 6 4 3 2 8 10 12 15 off x In test tg F G H I Ii (s) setting Ig 28 alarm tr 8 (s) 4 .9 12 16 .95 2 .98 1 20 24 1 .5 .8 .4 .4 .3 .2 .3 .1 .2 .1 2 0 19 32 (s) on I t 33 off ground fault 3 Micrologic A Schneider Electric Overview of functions Current protection Discovering your control unit Protection settings Depending on the type of installation, it is possible to set the tripping curve of your control unit using the parameters presented below. E51358A Micrologic 2.0 A t 1 2 3 0 Ir Isd I 1. current setting Ir (long time) 2. tripping delay tr (long time) for 6 x Ir 3. pick-up Isd (instantaneous) Micrologic 7.0 A 1 2 t t I t on E51396A t Micrologic 6.0 A E51386A E51359A Micrologic 5.0 A, 6.0 A, 7.0 A 2 I t on 2 2 I t off 2 4 1 I t off 1 3 2 2 5 Ir 0 Isd Ii I 0 Ig I 1. pick-up Ig (earth fault) 2. tripping delay tg (earth fault) 1. current setting Ir (long time) 2. tripping delay tr (long time) for 6 x Ir 3. pick-up Isd (short time) 4. tripping delay tsd (short time) 5. pick-up Ii (instantaneous) 0 I∆n I 1. pick-up I∆n (earth leakage) 2. tripping delay ∆t (earth leakage) Long-time protection The long-time protection function protects cables (phases and neutral) against overloads. This function is based on true rms measurements. Thermal memory The thermal memory continuously accounts for the amount of heat in the cables, both before and after tripping, whatever the value of the current (presence of an overload or not). The thermal memory optimises the long-time protection function of the circuit breaker by taking into account the temperature rise in the cables. The thermal memory assumes a cable cooling time of approximately 15 minutes. Long-time current setting Ir and standard tripping delay tr Micrologic control unit current setting tripping between 1.05 and 1.20 x Ir time delay (s) accuracy: 0 to -20 % 2.0 A and 5.0 A Ir = In x …(*) 0.4 0.5 0.6 0.7 0.8 0.9 0.95 other ranges or disable by changing rating plug 0.98 1 tr at 1.5 x Ir tr at 6 x Ir tr at 7.2 x Ir 12.5 0.5 0.34 500 20 13.8 600 24 16.6 25 1 0.69 50 2 1.38 100 4 2.7 200 8 5.5 300 12 8.3 400 16 11 * In: circuit breaker rating Setting accuracy of the Ir setting may be enhanced by using a different long-time rating plug. See the technical appendix "Changing the long-time rating plug". 4 Micrologic A Schneider Electric For the characteristics and external wiring of the zone selective interlocking function, see the technical appendix on "Zone selective interlocking". The portable test kit can be used to test the wiring between circuit breakers for the zone selective interlocking function. Short-time protection c the short-time protection function protects the distribution system against impedant short-circuits c the short-time tripping delay can be used to ensure discrimination with a downstream circuit breaker c this function carries out true rms measurements. c the I2t ON and I2t OFF options enhance discrimination with downstream protection devices c 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-time curve up to 10 Ir. Above 10 Ir, the time curve is constant. c zone selective interlocking (ZSI) The short-time and earth-fault protection functions enable time discrimination by delaying the upstream devices to provide the downstream devices the time required to clear the fault. Zone selective interlocking can be used to obtain total discrimination between circuit breakers using external wiring. Short-time pick-up Isd and tripping delay tsd Micrologic control unit pick-up accuracy ± 10 % time delay (ms) at 10 Ir I2t ON or I2t OFF 2.0 A, 5.0 A, 6.0 A and 7.0 A Isd = Ir x … 1.5 2 2.5 3 4 settings I2t OFF I2t ON tsd (max resettable time) tsd (max break time) 0 0.1 0.1 80 140 0.2 0.2 140 200 0.3 0.3 230 320 0.4 0.4 350 500 20 80 5 6 8 10 Instantaneous protection c the instantaneous-protection function protects the distribution system against solid short-circuits. Contrary to the short-time protection function, the tripping delay for instantaneous protection is not adjustable. The tripping order is sent to the circuit breaker as soon as current exceeds the set value, with a fixed time delay of 20 milliseconds. c this function carries out true rms measurements. Instantaneous pick-up Isd Micrologic control unit pick-up accuracy ± 10 % Isd = Ir x … 2.0 A 1.5 2 2.5 3 4 5 6 8 10 10 12 15 OFF Instantaneous pick-up Ii Micrologic control unit pick-up accuracy ± 10 % li = In x … (*) 5.0 A, 6.0 A and 7.0 A 2 3 4 6 8 * In: circuit-breaker rating 5 Micrologic A Schneider Electric Discovering your control unit Overview of functions Current protection Protection of the fourth pole on four-pole circuit breakers Protection of the neutral conductor depends on the distribution system. There are three possibilities. Type of neutral Neutral unprotected Neutral protection at 0.5 In Neutral protection at In Description. The distribution system does not require protection of the neutral conductor. The cross-sectional area of the neutral conductor is half that of the phase conductors. c the long-time current setting Ir for the neutral is equal to half the setting value c the short-time pick-up Isd for the neutral is equal to half the setting value c the instantaneous pick-up Isd (Micrologic 2.0 A) for the neutral is equal to half the setting value c the instantaneous pick-up Ii (Micrologic 5.0 A / 6.0 A / 7.0 A) for the neutral is equal to the setting value. The cross-sectional area of the neutral conductor is equal to that of the phase conductors. c the long-time current setting Ir for the neutral is equal to the setting value c the short-time pick-up Isd for the neutral is equal to the setting value c the instantaneous pick-ups Isd and Ii for the neutral are equal to the setting value. Earth-fault protection on Micrologic 6.0 A c an earth fault in the protection conductors can provoke local temperature rise at the site of the fault or in the conductors. The purpose of the earth-fault protection function is to eliminate this type of fault. c there are two types of earth-fault protection. Type Description Residual Source Ground Return c the function determines the zero-phase sequence current, i.e. the vectorial sum of the phase and neutral currents c it detects faults downstream of the circuit breaker. c using a special external sensor, this function directly measures the fault current returning to the transformer via the earth cable c it detects faults both upstream and downstream of the circuit breaker c the maximum distance between the sensor and the circuit breaker is ten metres. c earth-fault and neutral protection are independent and can therefore be combined. Earth-fault pick-up Ig and tripping delay tg The pick-up and tripping-delay values can be set independently and are identical for both the residual and "source ground return" earth-fault protection functions. Micrologic control unit pick-up accuracy ± 10 % time delay (ms) at 10 In (*) I2t ON or I2t OFF Ig = In x … (*) In ≤ 400 A 400 A < In ≤ 1200 A In > 1200 A settings I2t OFF I2t ON tg (max resettable time) tg (max break time) 6.0 A A 0.3 0.2 500 A 0 20 80 B 0.3 0.3 640 A 0.1 0.1 80 140 C 0.4 0.4 720 A 0.2 0.2 140 200 D 0.5 0.5 800 A 0.3 0.3 230 320 E 0.6 0.6 880 A 0.4 0.4 350 500 F 0.7 0.7 960 A G 0.8 0.8 1040 A H 0.9 0.9 1120 A I 1 1 1200 A * In: circuit-breaker rating 6 Micrologic A Schneider Electric Current protection and alarms Earth-leakage protection on Micrologic 7.0 A c the earth-leakage protection function primarily protects people against indirect contact because an earth-leakage current can provoke an increase in the potential of the exposed conductive parts. The earth-leakage pick-up value I∆n is displayed directly in amperes and the tripping delay follows a constant-time curve c an external rectangular sensor is required for this function c this function is inoperative if the long-time rating plug is not installed c d protected against nuisance tripping. c k DC-component withstand class A up to 10 A. Pick-up value I∆n and tripping delay ∆t Micrologic control unit pick-up accuracy 0 to - 20 % time delay (ms) 7.0 A I∆n 0.5 1 2 3 5 7 settings ∆t (max resettable time) ∆t (max break time) 60 140 140 200 230 320 350 500 800 1000 10 20 30 E51398A Overload LED long time Ir .7 .6 .5 .4 alarm tr 8 (s) 4 .9 12 16 .95 2 .98 1 20 24 1 .5 .8 x In at 6 Ir instantaneous short time Isd 4 5 3 2.5 6 2 8 1.5 10 x Ir tsd .4 .4 .3 .2 .3 .1 .2 .1 2 0 (s) on 3 2 1 .5 4 3 I t delay setting 5 (ms) 7 230 10 140 20 30 60 100 % 6 8 10 12 15 2 off x In test ∆t I∆n (A) Ii 40 % 350 800 earth leakage This LED signals that the long-time current setting Ir has been overrun. The auto-protection function (excessive temperature or short-circuit higher than circuit-breaker capacity) opens the circuit breaker and turns on the Ap LED. Micrologic 7.0 A Signals tripping due to an overrun of the short-time pick-up Isd or the instantaneous pick-up Isd / Ii. E51400A Signals tripping due to an overrun of the long-time current setting Ir. E51399A Caution. If the circuit breaker remains closed and the Ap LED remains on, contact the Schneider after-sales support department. Fault indications Micrologic 7.0 A Caution. The battery maintains the fault indications. If there are no indications, check the battery. Micrologic 7.0 A 7 Micrologic A Signals tripping due to the auto-protection function of the control unit. E51402A E51401A Signals tripping due to an overrun of the earth-fault pick-up Ig or the earthleakage pick-up I∆n. Micrologic 7.0 A Schneider Electric Overview of functions Ammeter measurements If no information is displayed on the screen, see the technical appendix "Digital display". c all Micrologic control units measure the true rms value of currents c the most heavily loaded phase is continuously displayed on the digital screen c using the navigation buttons, it is possible to display successively the I1, I2, I3, neutral IN, Ig, I∆N and stored-current (maximeter) values c the percent load on each phase is displayed. A bargraph displays the currents measured on phases 1, 2 and 3 as a percentage of the long-time current setting Ir. E60371A Discovering your control unit 1.125 x Ir 1 x Ir 0.8 x Ir 0.6 x Ir 0.4 x Ir 100 % 40 % 8 Micrologic A Schneider Electric 9 Micrologic A Schneider Electric Selecting the type of neutral protection Setting your control unit E51383A On four-pole circuit breakers, it is possible to select the type of neutral protection for the fourth pole: c neutral unprotected (4P 3D); c neutral protection at 0.5 In (3D + N/2); c neutral protection at In (4P 4D). /2 3D+N 4P 4D 4P 3D 10 Micrologic A Schneider Electric Setting procedure Setting procedure E51410A E51411A 1. Open the protective cover. Micro logic 7.0 A Micro 100 % 100 % 40 % 40 % menu E51412A 7.0 A Ir= menu 1 gic 7.0 logic 2 A 2. Select the desired setting. The set value is automatically displayed on the digital screen in absolute value with the relevant units. c Current in amperes (A and kA); c Tripping delays in seconds. 3. If no information is displayed, see the technical appendix "Digital display". If no further action is taken, after a few seconds, the display returns to the main menu for current measurements. A Microlo 4. Close the protective cover and, if necessary, install a lead seal to protect the settings. 100 % 40 % menu 3 See the user manual for the portable test kit Using the portable test kit E51413A E51410A To test the control unit, connect the portable test kit via the test connector. Micro logic 7.0 A Micro 100 % 100 % 40 % 40 % menu 1 logic 7.0 A menu 2 11 Micrologic A Schneider Electric The rating of the circuit breaker in this example is 2000 A. Set the threshold values E60365A Setting the Micrologic 2.0 A control unit E51366A Setting your control unit long time Ir .7 .6 .5 .4 alarm .8 x In .9 .95 .98 1 In = 2000 A Ir = 0.7 x In = 1400 A Isd = 3 x Ir = 4200 A instantaneous Isd 3 4 5 2.5 6 2 8 10 1.5 x Ir 1 setting In = 2000 A See pages 4 and 5 for information on the available settings E51368A A t Ir Isd 0 I Set the tripping delay E60366A 2000 long time tr (s) 4 2 1 .5 E51370A In = 8 alarm tr = 1 second 12 16 20 24 at 6 Ir t tr 0 12 I Micrologic A Schneider Electric Setting the Micrologic 5.0 A control unit Set the threshold values E51366A E60367A The rating of the circuit breaker in this example is 2000 A. In = 2000 A long time alarm Ir .8 .9 .95 .6 .98 .5 .4 1 x In .7 Ir = 0.7 x In = 1400 A Isd = 2 x Ir = 2800 A instantaneous short time Isd 6 8 10 4 12 3 15 2 off x In 6 8 10 2.5 2 1.5 x Ir 1 Ii = 3 x In = 6000 A Ii 4 5 3 setting In = 2000 A In = 2000 A See pages 4 and 5 for information on the available settings E60368A Set the tripping delay Thresholds E51372A E51373A tr Ir t 8 12 16 2 1 20 24 .5 (s) I2t OFF curve I2t ON curve t long time Ir alarm tr = 1 second 4 at 6 Ir tsd = 0.2 seconds short time tsd .4 .4 .3 .2 .3 .2 .1 .1 2 0 (s) Isd Isd Ii I 0 on Ii I2t on I2t off I t delay I 0 Tripping delays I2t OFF curve E51375A E51376A I2t ON curve t t tr tr tsd 0 tsd I 0 I 13 Micrologic A Schneider Electric Setting the Micrologic 6.0 A control unit The rating of the circuit breaker in this example is 2000 A. Set the threshold values E51366A E51414A Setting your control unit long time Ir .7 .6 .5 .4 .8 x In Ir = 0.7 x In = 1400 A short time Isd 3 4 5 6 2.5 2 8 1.5 10 x Ir 1 In = 2000 A alarm .9 .95 .98 1 Ii instantaneous 4 3 6 8 10 12 15 2 x In off setting D E F A A B G H C B In = 2000 A 2000 Ii = 3 x In = 6000 A test Ig In = Isd = 2 x Ir = 2800 A Ig = 640 A I ground fault See pages 4 to 6 for information on the available settings. E60372A Set the tripping delay Thresholds t tr (s) 4 I2t OFF curve E51372A E51373A I2t ON curve long time Ir t 8 2 1 .5 Ir alarm 12 16 20 24 tr = 1 second at 6 Ir short time tsd .4 .4 .3 .2 .3 .1 .2 .1 2 0 tsd = 0.2 seconds (s) Isd Isd E51415A E51416A t I t tg I (s) on 2 I t I2t off test .4 .4 .3 .3 .2 .1 t I2t on off delay 0 I 0 on Ii Ii .2 .1 0 off tg = 0.2 seconds ground fault Ig Ig 0 I 0 I Tripping delays I2t OFF curve E51375A E51376A I2t ON curve t t tr tr tsd 0 I E51418A E51419A 0 tsd t t tg tg 0 I I 0 I 14 Micrologic A Schneider Electric Setting the Micrologic 7.0 A control unit Set the threshold values E51366A E51420A The rating of the circuit breaker in this example is 2000 A. long time Ir .7 .6 .5 .4 alarm .8 .9 In = 2000 A .95 .98 x In Ir = 0.7 x In = 1400 A 1 short time Isd 3 4 5 6 2.5 2 8 1.5 10 x Ir 1 6 8 10 4 12 3 15 off 2 x In Isd = 2 x Ir = 2800 A Ii = 3 x In = 6000 A I∆n = 1 A test 3 5 7 2 1 .5 In = 2000 A 2000 instantaneous setting I∆n (A) In = Ii 10 20 30 A ground fault See pages 4 to 7 for information on the available settings. E60373A Set the tripping delay Thresholds t tr 4 8 12 16 2 20 1 24 .5 tr = 1 second alarm (s) I2t OFF curve E51372A E51373A I2t ON long time Ir t curve Ir at 6 Ir short time tsd = 0.2 seconds tsd .4 .4 .3 .2 .3 .1 .2 .1 2 0 (s) Isd Isd on Ii Ii I E51421A 0 (ms) 230 I 0 off I t delay ∆t I2t on I2t off test 350 140 t 60 800 ∆t = 140 milliseconds ground fault I∆n 0 I Tripping delays I2t OFF curve E51375A E51376A I2t ON curve t t tr tr tsd E51423A 0 tsd I 0 I t ∆t 0 I 15 Micrologic A Schneider Electric Fault and status indications Resetting the fault indications and checking battery status The procedure for closing the circuit breaker following a fault trip is presented in the circuit-breaker user manual. Resetting the fault indications E51439A c determine why the circuit breaker tripped. The fault indication is maintained until it is reset on the control unit. v press the fault-trip reset button. Micrologic 7.0 A v check the parameter settings of the control unit. E51440A Checking the battery Micrologic 7.0 A E51441A Press the battery-test button (same as the fault-trip reset button) to display the battery status. Battery fully charged Battery half charged Change the battery If no information is displayed, either: c no battery is installed in the control unit, or; c an auxiliary power supply is required. See the technical appendix "Digital display". Changing the control-unit battery 1. Remove the battery cover. E51442A E51443A 2. Remove the battery. 100 % 40 % 3. Insert a new battery. Check the polarity. 4. Put the cover back in place. Press the batterytest button to check the new battery. E51445A E51444A If the battery needs to be changed, please use the one with Schneider catalogue number 33593 (characteristics given on the battery compartment cover). + 100 % 40 % 16 Micrologic A Schneider Electric Testing the earth-fault and earthleakage functions E51456A E51410A Charge and close the circuit breaker. Using a screwdriver, press the test button for earth-fault and earth-leakage protection. The circuit breaker should open. Micro logic 7.0 A 7.0 logic Micro 100 % 100 % 40 % 40 % menu 1 A menu 2 If the circuit breaker does not open, contact the Schneider after-sales support department. 17 Micrologic A Schneider Electric Accessing the menus Symbols used: Three menus may be accessed on Micrologic control units, providing the following information: c phase current measurements I1, I2, I3, neutral IN, earth-fault current Ig on the Micrologic 6.0 A control unit and earth-leakage current I∆n on the Micrologic 7.0 A control unit; c maximeter current values for phases I1, I2, I3, neutral IN, the maximum earthfault current Ig on the Micrologic 6.0 A control unit and the maximum earth-leakage current I∆n on the Micrologic 7.0 A control unit; c protection settings and tripping delays. E51405A Briefly press a key. 2. Maximeter E51407A Press and hold a key. E51406A 1. Measurements Max A It is possible at any time to stop consulting a current measurement, a maximum current value recorded by the maximeter or the setting values. After a few seconds, the Micrologic control unit automatically returns to the main menu displaying the current value of the most heavily loaded phase. 100 % 40 % 40 % menu Press the "menu" button to access the maximum current values measured by the maximeter. Ir= A 100 % menu The protection settings can be displayed directly on the digital display. 3. Settings E51408A E51404A Menus Press the "menu" button to access the protection settings and tripping delays. A 100 % 40 % menu Press the "menu" button to return to the current measurements. E51409A 4. The system returns to the main "Measurements" menu. A 100 % 40 % 18 Micrologic A Schneider Electric Measuring phase currents Display of current I1. Display of current I2. E51426A E51425A Current values may be read in the "Measurements" menu, which is also the main menu. A A If no particular action is taken, the system displays the current value of the most heavily loaded phase. 100 % 100 % 40 % 40 % E51409A "Measurements" menu Phase 1 is the most heavily loaded. A 100 % Press the "arrow" button to go on to current I3. Display of current I3. Display of current IN. E51429A E51427A 40 % Press the "arrow" button to go on to current I2. A A 100 % 100 % 40 % 40 % Press the "arrow" button to go on to the earth-fault current Ig or the earthleakage current I∆n. Display of current Ig (Micrologic 6.0 A) or current I∆n (Micrologic 7.0 A). The system returns to the display of current I1. E51409A E51428A Press the "arrow" button to go on to current IN if the circuit breaker is connected to the neutral. A A 100 % 100 % 40 % 40 % Press the "arrow" button to return to current I1. 19 Micrologic A Schneider Electric Displaying the maximum current values Maximum current values may be read in the "Maximeter" menu. Display of the maximum I1 current. MAX If no particular action is taken, the system returns to the main menu. Display of the maximum I2 current. E51431A E51430A Menus MAX A A E51407A "Maximeter" menu. Max 100 % 100 % 40 % 40 % A 100 % Press the "arrow" button to go on to the maximum I2 current. Press the "arrow" button to go on to the maximum I3 current. Display of the maximum I3 current. Display of the maximum IN current. E51432A E51434A 40 % menu MAX MAX A A 100 % 100 % 40 % 40 % Display of the maximum Ig current or the maximum I∆n current. The system returns to the display of the maximum I1 current. E51435A Press the "arrow" button to go on to the maximum earth-fault current Ig (Micrologic 6.0 A) or the maximum earth-leakage current I∆n (Micrologic 7.0 A) E51433A Press the "arrow" button to go on to the maximum IN current if the circuit breaker is connected to the neutral. MAX MAX A A 100 % 100 % 40 % 40 % Press the "arrow" button to return to the maximum I1 current. 20 Micrologic A Schneider Electric Resetting the maximum current values MAX E51438A E51436A If no particular action is taken, the system returns to the main menu. Select another value to reset or return to the main menu. Reset. E51437A Select the maximum current value to be reset (e.g. I2 max.). Maximum current values can be reset using the "Maximeter" menu. MAX MAX A A A E51407A "Maximeter" menu. Max A 100 % 100 % 100 % 40 % 40 % 40 % 100 % 40 % menu Press the "arrow" button as many times as required to select I2 max. 21 Micrologic A Press and hold the "arrow" button down for three to four seconds. The current value flashes during the reset, then changes to the present value (the new maximum). Press the "arrow" button as many times as required to select another maximum value to reset or return to the main menu. Schneider Electric Menus Viewing the settings Micrologic control unit E60374A 2.0 A 5.0 A 6.0 A 7.0 A Long-time current setting Ir menu Long-time tripping delay tr Select the "Settings" menu. The Ir value is the first displayed. Ir= Press the "arrow" button to go on to the tr value. Press the "arrow" button to go on to the short-time Isd value. Short-time pick-up Isd tr= A s Isd= A Short-time tripping delay tsd Instantaneous pick-up Isd Press the "arrow" button to go on to the tsd value. tsd= Press the "arrow" button to go on to the instantaneous Isd value. Isd= s A Or Instantaneous pick-up Ii the instantaneous Ii value. Ii= Earth-fault pick-up Ig A Press the "arrow" button to go on to the Ig value. Ig= A Or Earth-leakage pick-up I∆n the I∆n value. I∆n= A Earth-fault tripping delay tg Press the "arrow" button to go on to the tg value. s tg= Or Earth-leakage tripping delay ∆t the ∆t value. ∆t= s Press the "arrow" button to return to the beginning of the menu. 22 Micrologic A Ir= A Schneider Electric 23 Micrologic A Schneider Electric Tripping curves Technical appendix E60369A Long-time and instantaneous protection (Micrologic 2.0 A) 10 000 5 000 Ir = 0.4…1 x In 2 000 1 000 500 200 100 tr = 0.5…24 s 50 20 10 5 t(s) 2 Isd = 1.5…10 x Ir 1 .5 .2 .1 .05 .02 .01 .005 .002 .001 .5 .7 1 2 3 4 5 7 10 20 30 50 70 100 200 300 I / Ir E60370A Long-time, short-time and instantaneous protection (Micrologic 5.0 A, 6.0 A and 7.0 A) 10 000 5 000 Ir = 0.4…1 x In 2 000 1 000 tr = 0.5…24 s 500 200 100 50 20 10 5 t(s) Isd = 1.5…10 x Ir 2 1 I2t ON .5 0.4 0.3 .2 0.2 0.1 .1 .05 .02 .01 0.4 0.3 I2t OFF 0 0.2 0. 1 0 Ii = 2…15 x In . OFF (1) .005 .002 .001 .5 .7 1 24 Micrologic A 2 3 4 5 7 10 x Ir 20 3 5 7 10 x In 20 30 Schneider Electric E46266A Earth-fault protection (Micrologic 6.0 A) 10 000 5 000 2 000 Ig = A…J x In (1) 1200 A max. 1 000 500 200 100 50 20 10 5 t(s) I2t ON 2 1 .5 .2 .1 .05 2 It 0.4 0.4 0.3 0.2 0.1 0.3 0.2 0.1 OFF 0 0 .02 .01 .005 .002 .001 .05.07 .1 .2 .3 .4 .5 .7 1 2 3 5 7 10 200 300 I / In 25 Micrologic A Schneider Electric Changing the long-time rating plug Technical appendix Select the long-time rating plug A number of setting ranges for the long-time current setting are available on Micrologic A control units by changing the long-time rating plug. The available rating plugs are listed below. Caution. Following any modifications to the longtime rating plug, all control-unit protection parameters must be checked. Part number Setting range for the Ir value 33542 33543 33544 33545 standard low setting high setting without long-time protection 0.4 to 1 x Ir 0.4 to 0.8 x Ir 0.8 to 1 x Ir Change the long-time rating plug Proceed in the following manner. 1. Open the circuit breaker. 3. Completely remove the long-time rating plug screw. E51379A E51378A 2. Open the protective cover of the control unit. 7.0 logic Micro A logic 100 % 100 % 40 % 40 % menu menu 5. Clip in the new rating plug. E51381A 4. Snap out the rating plug. E51380A Caution. If no long-time rating plug is installed, the control unit continues to operate under the following downgraded conditions: c the long-time current setting Ir is 0.4; c the long-time tripping delay tr corresponds to the value indicated by the adjustment dial; c the earth-leakage protection function is disabled. 7.0 A Micro logic 7.0 A logic 7.0 A Micro Micro 100 % 100 % 40 % 40 % menu menu alarm alarm long time .8 .9 .7 .95 .6 .98 .5 1 .4 x In Ir tr (s) 2 1 4 8 12 16 20 24 .5 @ 6 Ir 6. Refit the screw for the long-time rating plug. 26 Micrologic A long time .8 .9 .7 .95 .6 .98 .5 1 .4 x In Ir tr (s) 2 1 4 8 12 16 20 24 .5 @ 6 Ir 7. Check and/or modify the control-unit settings. Schneider Electric E51397A Zone selective interlocking (ZSI) Operating principle 1 c A fault occurs at point A. Downstream device no. 2 clears the fault and sends a signal to upstream device no. 1, which maintains the short-time tripping delay tsd or the earth-fault tripping delay tg to which it is set. c A fault occurs at point B. Upstream device no. 1 detects the fault. In the absence of a signal from a downstream device, the upstream device immediately trips without taking into account its tripping-delay settings. If it is connected to a device even further upstream, it sends a signal to that device, which delays tripping according to its tsd or tg setting. B 2 Note : On a circuit breaker likely to receive a ZSI signal, the tsd and tg tripping delays must not be set to zero, as this would make discrimination impossible. A Connections between control units A logic signal (0 or 5 volts) can be used for zone selective interlocking between the upstream and downstream circuit breakers. c Micrologic 5.0 A, 6.0 A, 7.0 A. c Micrologic 5.0 P, 6.0 P, 7.0 P. c Micrologic 5.0 H, 6.0 H, 7.0 H. Caution. If the protection function is not used on circuit breakers equipped for ZSI protection, a jumper must be installed to short terminals Z3, Z4 and Z5. If the jumper is not installed, the short-time and earth-fault tripping delays are set to zero, whatever the position of the adjustment dial. c maximum impedance: 2.7 Ω / 300 metres c capacity of connectors: 0.4 to 2.5 mm2 c maximum cross-sectional area of wires (including insulation): 3.5 mm2 c wires: single or multicore c maximum length: 3000 metres c limits to device interconnection: v the common ZSI - OUT - SOURCE (Z1) and the output ZSI - OUT (Z2) can be connected to a maximum of 10 inputs; v a maximum of 100 devices may be connected to an input ZSI IN CR (Z4) or GF (Z5) c connections are made from the output ZSI - OUT (Z2) on the downstream device to the input(s) ZSI - IN - ST (Z4) and/or GF (Z5) on the upstream device. E60375A Terminals Z1 to Z5 correspond to the identical indications on the circuit-breaker terminal blocks. Wiring and/or Z1 Z2 Z3 Z4 Z5 Terminal block for external connections Upstream circuit breaker and/or Z1 Z2 Z3 Z4 Z5 Terminal block for external connections Z1 Z2 Z3 Z4 Z5 Terminal block for external connections Downstream circuit breaker 27 Micrologic A Schneider Electric Technical appendix Digital display For information on connecting an external power supply, see the electrical diagrams in the circuit-breaker user manual. c display of measurements operates without an external power supply. The digital display goes off if the current drops below 0.2 x In (In = rated current). c display back-lighting is disabled in the following situations: v current less than 1 x In on one phase; v current less than 0.4 x In on two phases; v current less than 0.2 x In on three phases. c the maximeter does not operate for currents under 0.2 x In. These three functions may be maintained by adding an external power supply. Even if an external power supply is installed, the long-time, short-time, instantaneous and earth protection functions will not use it. 28 Micrologic A Schneider Electric Thermal memory Thermal memory The thermal memory is a means to simulate temperature rise and cooling caused by changes in the flow of current in the conductors. These changes may be caused by: c repetitive motor starting; c loads fluctuating near the protection settings; c repeated circuit-breaker closing on a fault. Control units without a thermal memory (contrary to bimetal strip thermal protection) do not react to the above types of overloads because they do not last long enough to cause tripping. However, each overload produces a temperature rise and the cumulative effect can lead to dangerous overheating. Control units with a thermal memory record the temperature rise caused by each overload. Even very short overloads produce a temperature rise that is stored in the memory. This information stored in the thermal memory reduces the tripping time. Micrologic control units and thermal memory All Micrologic control units are equipped as standard with a thermal memory c for all protection functions, prior to tripping, the temperature-rise and cooling time constants are equal and depend on the tripping delay in question: v if the tripping delay is short, the time constant is low; v if the tripping delay is long, the time constant is high. c for long-time protection, following tripping, the cooling curve is simulated by the control unit. Closing of the circuit breaker prior to the end of the time constant (approximately 15 minutes) reduces the tripping time indicated in the tripping curves. 29 Micrologic A Schneider Electric Schneider Electric Industries SA 5, rue Nadar 92506 Rueil-Malmaison Cedex France Tel: +33 (0)1 41 29 82 00 Fax:+33 (0)1 47 51 80 20 As standards, specifications and designs develop from time, always ask for confirmation of the information given in this publication. This document has been printed on ecological paper. Designed by: HeadLines Printed by: http://www.schneiderelectric.com 04443724AA-A 11-99