Introduction Characteristics and performance of Compact NSX circuit breakers from 100 to 250 A up to 690 V

Transcription

1 Functions and characteristics Introduction Characteristics and performance of Compact NSX circuit reakers from to A up to 69 V PB.eps PB6_.eps PB_.eps Compact NSX/6/. Compact NSX R. Compact NSX HB. () high currents (e.g. 3rd harmonics). () ZSI: Zone Selective Interlocking using pilot wires. (3) Vigi module is not availale for reaking capacity levels HB/HB. () There is no 6 A frame, use A frame with lower rating trip units for R, HB, HB. () P circuit reaker in 3P case for B and F types, only with thermal-magnetic trip unit. A-6 Common characteristics Rated voltages Ui Impulse withstand voltage Uimp Ue AC /6 Hz 69 Suitaility for isolation IEC/EN 697- yes Utilisation category A Pollution degree IEC Circuit reakers Breaking capacity levels Electrical characteristics as per IEC 697- In Numer of poles Breaking capacity (ka rms) Service reaking capacity (ka rms) Characteristics as per Nema AB Characteristics as per UL lcu lcs AC /6 Hz / V 3/ V V V V 66/69 V AC /6 Hz / V 3/ V V V V 66/69 V Mechanical Electrical V In/ In 69 V In/ In AC /6 Hz V V 6 V AC /6 Hz V V 6 V Protection and measurements Short-circuit protection Magnetic only Overload / short-circuit protection Thermal magnetic Electronic () with ground-fault protection with zone selective () Display / I, U, f, P, E, THD measurements / interrupted-current measurement Options Power Meter display on door Operating assistance Counters Histories and alarms Metering Com Device status/control Com Earth-leakage protection By Vigi module (3) By Vigirex relay Installation / connections Dimensions and weights /3P P /3P P Connections Connection terminals Pitch Cross-section mm² Common characteristics Control Versions Manual Electrical Plug-in ase Chassis NSX NSX6 () NSX B F N H S L R HB HB B F N H S L B F N H S L R HB HB 6 (), 3, 3, (), 3, (), 3, 3, x 6 x 6 x 6 x 6 x 6 x 6 x 6 x 6 x 6 x 6 x 6 x 6 x 6 x 6 x 6 x / mm 3/ mm 3/ mm 3/ mm A-7

2 Functions and characteristics Introduction Characteristics and performance of Compact NSX circuit reakers from to 63 A up to 69 V PB66.eps PB.eps PB3.eps Compact NSX/63. Compact NSX63 R. Compact NSX63 HB. () high currents (e.g. 3rd harmonics). () ZSI: Zone Selective Interlocking using pilot wires. (3) Vigi module is not availale for reaking capacity levels HB/HB. A- Common characteristics Rated voltages Ui Impulse withstand voltage Uimp Ue AC /6 Hz 69 Suitaility for isolation IEC/EN 697- yes Utilisation category A Pollution degree IEC Circuit reakers Breaking capacity levels Electrical characteristics as per IEC 697- In Numer of poles Breaking capacity (ka rms) lcu AC /6 Hz / V 3/ V V V V 66/69 V Service reaking capacity (ka rms) Characteristics as per Nema AB Characteristics as per UL lcs AC /6 Hz / V 3/ V V V V 66/69 V Mechanical Electrical V In/ In 69 V In/ In AC /6 Hz V V 6 V AC /6 Hz V V 6 V Protection and measurements Short-circuit protection Magnetic only Overload / short-circuit protection Thermal magnetic Electronic () with ground-fault protection with zone selective () Display / I, U, f, P, E, THD measurements / interrupted-current measurement Options Power Meter display on door Operating assistance Counters Histories and alarms Metering Com Device status/control Com Earth-leakage protection By Vigi module (3) By Vigirex relay Installation / connections Dimensions and weights /3P P /3P P Connections Connection terminals Pitch Cross-section mm² Common characteristics Control Versions Manual Electrical Plug-in ase Chassis NSX NSX63 = - A = - 63 A F N H S L R HB HB F N H S L R HB HB R HB HB , 3, 3, 3, x x x x x x x x /. mm /. mm /7 mm /7 mm x x A-9

3 Functions and characteristics Protection of distriution systems Compact NS circuit reakers from 63 up to 3 A Compact circuit reakers Numer of poles Control manual electric Type of circuit reaker Connections front connection rear connection In () Compact NSL. Ui Uimp Ue Type of circuit reaker Compact NS6H. Manual lcu lcs front connection with are cales front connection rear connection Electrical lcu lcs lcw s mechanical electrical In In - - H L LB H L H H H H L LB H L H H H H L LB H L H H H B B B B B B B B B Compact NSH. () 6 C with vertical connections. See the temperature derating tales for other types of connections.

4 Functions and characteristics TM thermal-magnetic and MA magnetic trip units can e used on Compact NSX/6/ circuit reakers with performance levels B/F/H/N/S/L. TM trip units are availale in versions: TM-D, for the protection of distriution cales TM-G, with a low threshold, for the protection of generators or long cale lengths. Vigi modules or Vigirex relays can e added to all the circuit reakers to provide external earth-leakage protection. DB6.eps Protection of distriution systems TM thermal-magnetic and MA magnetic trip units TM-D and TM-G thermal-magnetic trip units Circuit reakers equipped with thermal-magnetic trip units are used mainly in industrial and commercial electrical distriution applications: TM-D, for protection of cales on distriution systems supplied y transformers TM-G, with a low pick-up for generators (lower short-circuit currents than with transformers) and distriution systems with long cale lengths (fault currents limited y the impedance of the cale). Protection... Thermal protection () Thermal overload protection ased on a imetal strip providing an inverse time curve I t, corresponding to a temperature rise limit. Aove this limit, the deformation of the strip trips the circuit reaker operating mechanism. This protection operates according to: that can e adjusted in amps from.7 to times the rating of the trip unit (6 A to A), corresponding to settings from to A for the range of trip units a non-adjustale time delay, defined to ensure protection of the cales. Magnetic protection (Im) Short-circuit protection with a fixed or adjustale pick-up Im that initiates instantaneous tripping if exceeded. TM-D: fixed pick-up, Im, for 6 to 6 A ratings and adjustale from to for and A ratings fixed pick-up for 6 to 63 A ratings. Protection against insulation faults Two solutions are possile y adding: a Vigi module acting directly on the trip unit of the circuit reaker a Vigirex relay connected to an MN or MX voltage release. Protection versions 3-pole: vv3p 3D: 3-pole frame (3P) with detection on all 3 poles (3D) vv3p D: 3-pole frame (3P) with detection on poles (D). -pole: vvp 3D: -pole frame (P) with detection on 3 poles (3D). vvp D: -pole frame (P) with detection on all poles (same threshold for phases and neutral). DB7.eps MA magnetic trip units Note: All the trip units have a transparent lead-sealale cover that protects access to the adjustment dials. In distriution applications, circuit reakers equipped with MA magnetic-only trip units are used for: short-circuit protection of secondary windings of LV/LV transformers with overload protection on the primary side. as an alternative to a switch-disconnector at the head of a switchoard in order to provide short-circuit protection. Their main use is however for motor protection applications, in conjunction with a thermal relay and a contactor or motor starter (see "Motor protection", page A-). Protection... Magnetic protection (Im) Short-circuit protection with an adjustale pick-up Im that initiates instantaneous tripping if exceeded. Im = In x... set in amps on an adjustment dial covering the range 6 to for. to A ratings or 9 to In for to A ratings. Protection versions 3-pole (3P 3D): 3-pole frame (3P) with detection on all 3 poles (3D). -pole (P 3D): -pole frame (P) with detection on 3 poles (3D). A-6

5 Thermal-magnetic trip units TM6D to D Ratings (A) In at C () Circuit reaker Compact NSX Thermal protection Compact NSX Compact NSX = In x... adjustale in amps from.7 to tripping etween. and. Time delay (s) tr non-adjustale tr at. to tr at 6 x Magnetic protection Im fixed adjustale accuracy ± % Compact NSX Compact NSX6/ to xin Time delay tm fixed Neutral protection Unprotected neutral P 3D no detection Fully protected neutral P D x Magnetic trip units MA. to Ratings (A) In at 6 C Circuit reaker Compact NSX - - Compact NSX Compact NSX Instantaneous magnetic protection accuracy ± % Im = In x... adjustale in amps from 6 to (9 settings) adjustale in amps from 9 to Time delay (ms) tm none Thermal-magnetic trip units TM6G to G Ratings (A) In at C () Circuit reaker Compact NSX Compact NSX Compact NSX Thermal protection = In x... adjustale in amps from.7 to tripping etween. and. Time delay (s) tr non-adjustale tr at. to tr at 6 x - Magnetic protection Im fixed accuracy ± % Compact NSX Compact NSX Compact NSX Time delay tm fixed Neutral protection Unprotected neutral P 3D no Fully protected neutral P D x () For temperatures greater than C, the thermal protection characteristics are modified. See the temperature derating tale. A-7

6 DB3.eps NS NS6 ( A) NSX NSX Acti 9 Compact NSX with Micrologic for total discrimination with Acti 9 devices rated y A or a C6. Better coordination etween protection functions reduces the difference in ratings required for total discrimination. Unmatched discrimination Discrimination Compact NSX provides maximum continuity of service and savings through an unmatched level of discrimination: given the high accuracy of measurements, overload discrimination is ensured even etween very close ratings for major faults, the fast processing of the Micrologic trip units means the upstream device can anticipate the reaction of the downstream device. The upstream reaker adjusts its tripping delay to provide discrimination for very high faults, the energy of the arc dissipated y the short-circuit in the downstream reaker causes reflex tripping. The current seen y the upstream device is significantly limited. The energy is not sufficient to cause tripping, so discrimination is maintained whatever the short-circuit current. For total discrimination over the entire range of possile faults, from the long-time pick-up to the ultimate short-circuit current Icu, a ratio of. must e maintained etween the ratings of the upstream and downstream devices. This ratio is required to ensure selective reflex tripping for high short-circuits. Understanding the names of Micrologic electronic trip units Protection Frame Measurements Applications : I : NSX/6/ A: Ammeter Distriution, otherwise : LS I DB9.eps DB.eps G: Generator : LSI AB: Pulic distriution () 6: LSIG M: Motors Z: 6 Hz /3 () I: Instantaneous 3: NSX/63 E: Energy L: Long time S : Short time () (fixed delay) S: Short time G: Ground fault DB.eps DB6.eps Examples Micrologic.3 Instantaneous only or 63 A Distriution Micrologic.3 LS I or 63 A Distriution Micrologic. A LSI, 6 or A Ammeter Distriution Micrologic 6.3 E-M LSIG or 63 A Energy Motor () AB-Z: except NSX R, HB, HB. () LS I protection is standard on Micrologic. To ensure discrimination, it offers short-time protection S with a non-adjustale delay and instantaneous protection. A-

7 Functions and characteristics Protection of distriution systems Micrologic and.3 M trip units Micrologic trip units can e used on Compact NSX to 63 circuit reakers with performance levels B/F/H/N/S/L. They provide: standard protection of distriution cales indication of: v overloads (via LEDs) v overload tripping (via the SDx relay module). Circuit reakers equipped with Micrologic.3 M trip units, without thermal protection, are used in certain applications to replace switch-disconnectors at the head of switchoards. Micrologic.3 M trip units are dedicated to Compact NSX/63 A circuit reakers. DB.eps Micrologic Circuit reakers equipped with Micrologic trip units can e used to protect distriution systems supplied y transformers. For generators and long cales, Micrologic G trip units offer etter suited low pick-up solutions (see page A-6). Protection... Settings are made using the adjustment dials with fine adjustment possiilities. Overloads: Long time protection () Inverse time protection against overloads with an adjustale current pick-up set using a dial and a non-adjustale time delay tr. Short-circuits: Short-time protection with fixed time delay () Protection with an adjustale pick-up. Tripping takes place after a very short delay used to allow discrimination with the downstream device. Short-circuits: Non-adjustale instantaneous protection Instantaneous short-circuit protection with a fixed pick-up. Neutral protection On 3-pole circuit reakers, neutral protection is not possile. On four-pole circuit reakers, neutral protection may e set using a three-position switch: vvp 3D: neutral unprotected vvp 3D + N/: neutral protection at half the value of the phase pick-up, i.e.. x vvp D: neutral fully protected at. DB.eps PB3377.eps Indications... Front indications Green Ready LED: flashes slowly when the circuit reaker is ready to trip in the event of a fault. Orange overload pre-alarm LED: steady on when I > 9 %. Red overload LED: steady on when I > %. SDx remote indication relay module with its terminal lock. DB6.eps Remote indications An overload trip signal can e remoted y installing an SDx relay module inside the circuit reaker. This module receives the signal from the Micrologic electronic trip unit via an optical link and makes it availale on the terminal lock. The signal is cleared when the circuit reaker is reclosed. For description, see page A-93. Micrologic.3 M for magnetic protection only A Note: all the trip units have a transparent lead-sealale cover that protects access to the adjustment dials. A- Micrologic.3 M trip units provide magnetic protection only, using electronic technology. They are dedicated to /63 A 3-pole (3P 3D) circuit reakers or -pole circuit reakers with detection on 3 poles (P, 3D) and are used in certain applications to replace switch-disconnectors at the head of switchoards. They are especially used in 3-pole versions for motor protection, see page A-.

8 Micrologic Ratings (A) In at C () 6 63 Circuit reaker Compact NSX L Compact NSX Compact NSX - - Compact NSX Compact NSX Long-time protection Io value depending on trip unit rating (In) and setting on dial tripping etween In = A Io = and. In = A Io = In = 6 A Io = In = A (NSX) Io = 6 7 In = A (NSX) Io = In = A Io = In = 63 A Io = = Io x... 9 fine adjustment settings from.9 to ( ) for each value of Io Time delay (s) tr non-adjustale accuracy to -%. x 6 x 6 7. x Thermal memory minutes efore and after tripping S Short-time protection with fixed time delay accuracy ± % = x Time delay (ms) tsd non-adjustale Non-tripping time Maximum reak time I Instantaneous protection accuracy ± % Ii non-adjustale Non-tripping time Maximum reak time ms ms for I >. Ii () If the trip units are used in high-temperature environments, the Micrologic setting must take into account the thermal limitations of the circuit reaker. See the temperature derating tale. Ii Micrologic.3 M Ratings (A) In at 6 C 3 Circuit reaker Compact NSX - Compact NSX63 S Short time protection accuracy ± % adjustale directly in amps Time delay (ms) tsd non-adjustale I Non-tripping time Maximum reak time Instantaneous protection accuracy ± % 9 settings: 6, 9,, 6,, 3, 3, 3, 6 A 6 Ii non-adjustale 6 Non-tripping time Maximum reak time 3 ms 9 settings:, 3, 3,,,,, 6, 6 A A-9

9 Functions and characteristics Protection of distriution systems Micrologic / 6 A or E trip units DB66.eps DB67.eps PB3377.eps Micrologic / 6 A (Ammeter) or E (Energy) trip units can e used on Compact NSX to 63 circuit reakers with performance levels B/F/H/N/S/L. They all have a display unit. They offer asic LSI protection (Micrologic ) or LSI and ground-fault protection G (Micrologic 6). They also offer measurement, alarm and communication functions. Measurement Display Settings Maintenance Trip unit menus. fault Faulty phase Display of interrupted current. Interrupted current DB9.eps Protection Settings can e adjusted in two ways, using the dials and/or the keypad. The keypad can e used to make fine adjustments in A steps elow the maximum value defined y the setting on the dial. Access to setting modifications via the keypad is protected y a locking function displayed on the screen and controlled y a microswitch. The lock is activated automatically if the keypad is not used for minutes. Access to the microswitch is protected y a transparent lead-sealale cover. With the cover closed, it is still possile to display the various settings and measurements using the keypad. Overloads: Long time protection () Inverse time protection against overloads with an adjustale current pick-up set using a dial or the keypad for fine adjustments. The time delay tr is set using the keypad. Short-circuits: Short-time protection () Short-circuit protection with an adjustale pick-up and adjustale time delay tsd, with the possiility of including a portion of an inverse time curve (I t On). Short-circuits: Instantaneous protection (Ii) Instantaneous protection with adjustale pick-up Ii. Additional ground fault protection (Ig) on Micrologic 6 Residual type ground-fault protection with an adjustale pick-up Ig (with Off position) and adjustale time delay tg. Possiility of including a portion of an inverse time curve (I t On). Neutral protection On -pole circuit reakers, this protection can e set via the keypad: vvoff: neutral unprotected vv.: neutral protection at half the value of the phase pick-up, i.e.. x vv.: neutral fully protected at vvosn: Oversized neutral protection at.6 times the value of the phase pick-up. Used when there is a high level of 3rd order harmonics (or orders that are multiples of 3) that accumulate in the neutral and create a high current. In this case, the device must e limited to =.63 for the maximum neutral protection setting of.6 x. With 3-pole circuit reakers, the neutral can e protected y installing an external neutral sensor with the output (T, T) connected to the trip unit. Zone selective interlocking (ZSI) A ZSI terminal lock may e used to interconnect a numer of Micrologic control units to provide zone selective interlocking for short-time () and ground-fault (Ig) protection, without a time delay. For Compact NSX to, the ZSI function is availale only in relation to the upstream circuit reaker (ZSI out). Display of type of fault... On a fault trip, the type of fault (,, Ii, Ig), the phase concerned and the interrupted current are displayed. An external power supply is required. Indications... Front indications SDx remote indication relay module with its terminal lock. Note: all the trip units have a transparent lead-sealale cover that protects access to the adjustment dials. A- Green Ready LED: flashes slowly when the circuit reaker is ready to trip in the event of a fault. Orange overload pre-alarm LED: steady on when I > 9 %. Red overload LED: steady on when I > %. Remote indications An SDx relay module installed inside the circuit reaker can e used to remote the following information: overload trip overload prealarm (Micrologic ) or ground fault trip (Micrologic 6). This module receives the signal from the Micrologic electronic trip unit via an optical link and makes it availale on the terminal lock. The signal is cleared when the circuit reaker is closed. These outputs can e reprogrammed to e assigned to other types of tripping or alarm. The module is descried in detail in the section dealing with accessories.

10 Protection Micrologic / 6 A or E trip units Ratings (A) In at C () () 6 63 Circuit reaker Compact NSX Compact NSX Compact NSX - - Compact NSX Compact NSX L Long-time protection =... dial setting value depending on trip unit rating (In) and setting on dial tripping etween In = A Io = and. In = A Io = In = 6 A Io = In = A Io = 6 7 In = A Io = In = 63 A Io = keypad setting Fine adjustment in A steps elow maximum value set on dial Time delay (s) tr =... keypad setting. 6 accuracy to - %. x 6 x x.7... Thermal memory minutes efore and after tripping S Short-time protection with adjustale time delay = x... dial setting accuracy ± % for Micrologic Fine adjustment in. x steps using the keypad keypad settings for micrologic 6 Time delay (s) tsd =... keypad setting I Adjustment in steps of. over the range. to: ( to 6 A), ( to A) or (63 A) I Off.. I On -.. Non-tripping time (ms) 3 3 Maximum reak time (ms) 3 Instantaneous protection accuracy ± % Ii = In x keypad setting Adjustment in steps of. over the range. to: ( to 6 A), ( to A) or (63 A) Non-tripping time Maximum reak time ms ms for I > Ii G Ground-fault protection - for Micrologic 6 A or E Ig = In x dial setting accuracy ± % In = A Off In > A Off Fine adjustment in. A steps using the keypad Time delay (s) tg =... keypad I Off.. setting I On -.. Non-tripping time (ms) 3 3 Maximum reak time (ms) 3 Test Ig function uilt-in () If the trip units are used in high-temperature environments, the Micrologic setting must take into account the thermal limitations of the circuit reaker. See the temperature derating tale. () For A rating, the neutral N/ adjustment is not possile. A-

11 long time.7. tr.9 (s) instantaneous x setting alarm long time alarm.7. tr.9 (s) short time instantaneous tsd I i (s) off x on I t setting delay long time alarm.7. tr.9 (s) short time instantaneous 3 tsd I i (s) on I off t x setting delay test D E tg Ig F (s)...3 C G.3. B H.. A I. on I t ground fault menu long time.7. tr.9 (s) instantaneous x setting menu alarm long time tr alarm.7..9 (s) short time instantaneous tsd 3 (s).. I i x on I off t setting delay menu long time.7. tr.9 (s) short time 3 tsd (s) on I t x setting delay D E tg Ig F (s)...3 C G.3. B H.. A I. on I t off ground fault menu alarm instantaneous I i 6 3 off test long time alarm.7. tr.9 (s) short time instantaneous 3 tsd (s).. I i off x on I t off setting delay test IΔn 3 ΔI earth leakage menu long time.7. tr.9 (s) instantaneous x setting menu alarm long time tr alarm.7..9 (s) short time instantaneous tsd 3 (s).. I i x on I off t setting delay menu long time alarm.7. tr.9 (s) short time instantaneous 3 tsd I i (s) on I off t x setting delay test D E tg Ig F (s)...3 C G.3. B H.. A I. on I t ground fault long time.7. tr alarm.9 (s) short time instantaneous. 3 tsd I i (s) x on I off t off setting delay test long time.7. tr alarm.9 (s) short time instantaneous tsd I i (s) on I off x t off setting delay test Ig D E tg F (s)...3 C G.3. B H.. A J. on I t off ground fault long time.7. tr alarm.9 (s) short time instantaneous tsd I i (s) on I off x t off setting delay test IΔn Δt (A) 3 (ms) earth leakage Functions and characteristics Micrologic control units Overview of functions indications. Micrologic name codes. E X Y Z Dependaility conducted or radiated disturances. an independent microprocessor. Accessories descried on. the documentation accessile via the Products and services menu of the we site. Current protection Micrologic : asic protection Protection: long time + instantaneous Micrologic without measurement. Micrologic. Measurements and programmale protection A: ammeter I, I, I, I N, I earth-fault, I fault indications. A Micrologic. A E: Energy P: A + power meter + programmale protection incorporates all the rms measurements of power factor, power and measurements. v calculates the current demand value v "Quickview" function for. E Micrologic. E peak peak minimeters phase sequence, reverse power or current measurements of interrupted currents, differentiated fault indications, maintenance indications, event % % X: type of protection for selective protection at 6 % at 6 % at 6 Y: control-unit generation Z: type of measurement Micrologic : selective protection Protection: long time + short time + instantaneous. Micrologic.. A Micrologic. A % %. E Micrologic. E % %. P Micrologic. P 6A N 3 at 6 at 6 at 6 6 Micrologic 6: selective + earth-fault protection Protection: long time + short time + instantaneous + earth fault 6. Micrologic A Micrologic 6. A % 6. E Micrologic 6. E % 6. P Micrologic 6. P 6A N 3 % % at 6 at 6 at 6 off off 6 Micrologic 7: selective + earth-leakage Protection: long time + short time + instantaneous + earth leakage up to 3A 7. A Micrologic 7. A % 7. P Micrologic 7. P 6A N 3 % at

12 Functions and characteristics Micrologic control units For Compact NS63 to 3 DB7.eps Micrologic.,. and 6. control units protect power circuits. Micrologic. and 6. offers time discrimination for short-circuits as well. Micrologic 6. Protection Protection thresholds and delays are set using the adjustment dials. Overload protection True rms long-time protection. Thermal memory: thermal image efore and after tripping. Setting accuracy may e enhanced y limiting the setting range using a different long-time rating plug. Overload protection can e cancelled using a specific LT rating plug "Off". Short-circuit protection Short-time (rms) and instantaneous protection. Selection of It type (ON or OFF) for short-time delay. Earth-fault protection Residual or source ground return earth fault protection. Selection of It type (ON or OFF) for delay. Neutral protection On three-pole circuit reakers, neutral protection is not possile. On four-pole circuit reakers, neutral protection may e set using a three-position switch: neutral unprotected (P 3d), neutral protection at. (P 3d + N/) or neutral protection at (P d). Indications Overload indication y alarm LED on the front; the LED goes on when the current exceeds the long-time trip threshold. Test A mini test kit or a portale test kit may e connected to the test connector on the front to check circuit-reaker operation after installing the trip unit or accessories. long time tr (s) at 6 short time 3.. x Fault indications (only for micrologic 6.) alarm 6 tsd (s) on setting Ig D E F G C H B I A I t delay Ii instantaneous 3 off 6 test tg (s) on I t off ground fault long-time threshold and tripping delay overload alarm (LED) short-time pick-up and tripping delay instantaneous pick-up fixing screw for long-time rating plug test connector indication of tripping cause earth-leakage or earth-fault pick-up and tripping delay Note: Micrologic control units are equipped with a transparent lead-seal cover as standard. A- LEDs indicate the type of fault: overload (long-time protection ) short-circuit (short-time or instantaneous li protection) earth fault or earth leakage (Ig) internal fault (Ap). Battery power The fault indication LEDs remain on until the test/reset utton is pressed. Under normal operating conditions, the attery supplying the LEDs has a service life of approximately years.

13 Micrologic. Long time Current setting (A) = In x tripping etween. and. x Time setting Time delay (s) accuracy: to -3 % accuracy: to - % accuracy: to - % Thermal memory () to - % - () to -6 % = x. 3 6 tr I Micrologic. / 6. tr (s). x 6 x 7. x Other ranges or disale y changing long-time rating plug () () minutes efore and after tripping DB3.eps Long time Current setting (A) = In x Tripping etween. and. x Time setting Time delay (s) Accuracy: to -3 % Accuracy: to - % Accuracy: to - % Thermal memory () to - % - () to -6 % Short time = x Accuracy: ± % Settings Time setting tsd (s) Earth fault Accuracy: ± % t max. resettale time: ms; max reak time: ms Protection Time delay (ms) at x (It Off or It On) Instantaneous Accuracy: ± % Time delay t. 3 6 It Off It On tsd (max resettale time) tsd (max reak time) Ii = In x 3 6 off E F G.. H.9.9 J It on tr It off tsd Ii. I Max resettale time: ms Max reak time: ms Micrologic 6. A B C D It Off.. Time setting tg (s).. It On 3 Time delay (ms) tg (max resettale time) tg (max reak time) 3 at In or A (It Off or It On) Note: all current-ased protection functions require no auxiliary source. The test / reset utton resets maximeters, clears the tripping indication and tests the attery. Ig = In x In y A A < In < A In u A Settings DB36.eps Instantaneous accuracy: ± % Time delay tr (s). x 6 x 7. x other ranges or disale y changing long-time rating plug () 6.7 () minutes efore and after tripping DB3.eps Protection A-9

14 Functions and characteristics Micrologic control units Micrologic A "ammeter" DB33.eps Micrologic A control units protect power circuits. They also offer measurements, display, communication and current maximeters. Version 6 provides earth-fault protection, version 7 provides earth-leakage protection. "Ammeter" measurements Micrologic A control units measure the true (rms) value of currents. They provide continuous current measurements from. to. In and are accurate to within. % (including the sensors). A digital LCD screen continuously displays the most heavily loaded phase (Imax) or displays the I, I, I3, IN, Ig,I n, stored-current (maximeter) and setting values y successively pressing the navigation utton. The optional external power supply makes it possile to display currents < % In. Below. In, measurements are not significant. Between.and. In, accuracy changes linearly from % to. %. Communication option In conjunction with the COM communication option, the control unit transmits the following: settings all ammeter measurements tripping causes maximeter readings. Protection Protection thresholds and delays are set using the adjustment dials. Overload protection True rms long-time protection. Thermal memory: thermal image efore and after tripping. Setting accuracy may e enhanced y limiting the setting range using a different long-time rating plug. Overload protection can e cancelled using a specific LT rating plug "Off". Short-circuit protection Short-time (rms) and instantaneous protection. Selection of It type (ON or OFF) for short-time delay. Earth-fault protection Residual or source ground return earth fault protection. Selection of It type (ON or OFF) for delay. Residual earth-leakage protection (Vigi). Operation without an external power supply. q Protected against nuisance tripping. k DC-component withstand class A up to A. Neutral protection On three-pole circuit reakers, neutral protection is not possile. On four-pole circuit reakers, neutral protection may e set using a three-position switch: neutral unprotected (P 3d), neutral protection at. (P 3d + N/), neutral protection at (P d) long-time threshold and tripping delay overload alarm (LED) at. short-time pick-up and tripping delay instantaneous pick-up earth-leakage or earth-fault pick-up and tripping delay earth-leakage or earth-fault test utton long-time rating plug screw test connector lamp test, reset and attery test indication of tripping cause digital display three-phase argraph and ammeter navigation uttons Zone selective interlocking (ZSI) A ZSI terminal lock may e used to interconnect a numer of control units to provide total discrimination for short-time and earth-fault protection, without a delay efore tripping. Overload alarm A yellow alarm LED goes on when the current exceeds the long-time trip threshold. Fault indications LEDs indicate the type of fault: overload (long-time protection ) short-circuit (short-time or instantaneous li protection) earth fault or earth leakage (Ig or I n) internal fault (Ap). Battery power The fault indication LEDs remain on until the test/reset utton is pressed. Under normal operating conditions, the attery supplying the LEDs has a service life of approximately years. Test A mini test kit or a portale test kit may e connected to the test connector on the front to check circuit-reaker operation. For Micrologic 6. A and 7. A control units, the operation of earth-fault or earth-leakage protection can e checked y pressing the test utton located aove the test connector. Note: Micrologic A control units come with a transparent lead-seal cover as standard. A-

15 Micrologic. A tr (s). x 6 x 7. x Time setting tg (s) Time delay (ms) at In or A (It Off or It On) Residual earth leakage (Vigi) Sensitivity (A) Accuracy: to - % Time delay Dt (ms) Ammeter Type of measurements Instantaneous currents tr I Max resettale time: ms Max reak time: ms Micrologic. / 6. / 7. A tr (s). x 6 x 7. x It Off It On tsd (max resettale time) tsd (max reak time) ANSI Code Ii = In x Micrologic. / 6. / 7. A Other ranges or disale y changing long-time rating plug () () minutes efore and after tripping t off D E F G.. H.9.9 J It on tr It off tsd Ii. I Max resettale time: ms Max reak time: ms ANSI Code N Ig = In x In y A A < In < A In u A Settings It Off It On tg (max resettale time) tg (max reak time) ANSI Code G IDn Micrologic 6. A A B C Micrologic 7. A. Settings Dt (max resettale time) Dt (max reak time) DB36.eps Earth fault Accuracy: ± % DB37.eps Time delay (ms) at x (It Off or It On) Instantaneous Accuracy: ± % Time delay t Protection Long time ANSI Code 9 Current setting (A) = In x Tripping etween. and. x Time setting Time delay (s) Accuracy: to -3 % Accuracy: to - % Accuracy: to - % Thermal memory () to - % - () to -6 % Short time ANSI Code = x Accuracy: ± % Settings Time setting tsd (s) Other ranges or disale y changing long-time rating plug () () minutes efore and after tripping DB3.eps Long time ANSI Code 9 Current setting (A) Tripping etween. and. x Time setting Time delay (s) Accuracy: to -3 % Accuracy: to - % Accuracy: to - % Thermal memory () to - % - () to -6 % Instantaneous ANSI Code = x Accuracy: ± % Time delay DB3.eps Protection Micrologic. /. / 6. / 7. A Range. to. I, I, I3, IN. to In Ig (6. A) to 3 A IDn (7. A). to. Current maximeters of I, I, I3, IN Note: all current-ased protection functions require no auxiliary source. The test / reset utton resets maximeters, clears the tripping indication and tests the attery. Accuracy ±. % ± % ±. % ±. % A-

16 Functions and characteristics Micrologic control units Micrologic E energy DB3.eps Micrologic E control units protect power circuits. They also offer measurements, display, communication and current maximeters. Version 6 provides earth-fault protection. "Energy meter" measurements In addition to the ammeter measurements of Micrologic A Micrologic E control units measure and display: current demand voltages: phase to phase, phase to neutral, average () and unalanced () instantaneous power: P, Q, S power factor: PF power demand: P demand energy: Ep, Eq (), Es (). Accuracy of active energy Ep is % (including the sensors). The range of measurement is the same as current with Micrologic A, depending of an external power supply module ( V DC). Communication option In conjunction with the COM communication option, the control unit transmits the following: settings all "ammeter" and "energy" measurements enale connection to FDM tripping causes maximeter / minimeter readings. Protection Protection thresholds and delays are set using the adjustment dials. Overload protection True rms long-time protection. Thermal memory: thermal image efore and after tripping. Setting accuracy may e enhanced y limiting the setting range using a different long-time rating plug. Overload protection can e cancelled using a specific LT rating plug "Off". Short-circuit protection Short-time (rms) and instantaneous protection. Selection of It type (ON or OFF) for short-time delay. Earth-fault protection Residual or source ground return earth fault protection. Selection of It type (ON or OFF) for delay. Neutral protection On three-pole circuit reakers, neutral protection is not possile. On four-pole circuit reakers, neutral protection may e set using a three-position switch: neutral unprotected (P 3d), neutral protection at. (P 3d + N/), neutral protection at (P d). Zone selective interlocking (ZSI) A ZSI terminal lock may e used to interconnect a numer of control units to provide total discrimination for short-time and earth-fault protection, without a delay efore tripping. Overload alarm A yellow alarm LED goes on when the current exceeds the long-time trip threshold long-time threshold and tripping delay overload alarm (LED) at. short-time pick-up and tripping delay instantaneous pick-up earth-leakage or earth-fault pick-up and tripping delay earth-leakage or earth-fault test utton long-time rating plug screw test connector lamp test, reset and attery test indication of tripping cause digital display three-phase argraph and ammeter navigation utton "quick View" (only with Micrologic E) navigation utton to view menu contents navigation utton to change menu Programmale contacts The programmale contacts may e used to signal events (,, Alarm, Alarm Ig, Ig). They can e programmed using the keypad on the Micrologic E control unit or remotely using the COM option (BCM ULP) and RSU software. Fault indications LEDs indicate the type of fault: overload (long-time protection ) short-circuit (short-time or instantaneous li protection) earth fault (Ig) internal fault (Ap). Trip history The trip history displays the list of the last trips. For each trip, the following indications are recorded and displayed: the tripping cause:,, li, Ig or Auto-protection (Ap) trips the date and time of the trip (requires communication option). Battery power The fault indication LEDs remain on until the test/reset utton is pressed. Under normal operating conditions, the attery supplying the LEDs has a service life of approximately years. Test () Display on FDM only. Note: Micrologic E control units come with a transparent lead-seal cover as standard. A- A mini test kit or a portale test kit may e connected to the test connector on the front to check circuit-reaker operation. For Micrologic 6. E control units, the operation of earth-fault or earth-leakage protection can e checked y pressing the test utton located aove the test connector.

17 Micrologic. E tr (s). x 6 x 7. x Earth fault Accuracy: ± % Time setting tg (s) Time delay (ms) at In or A (It Off or It On) Energy Type of measurements Instantaneous currents tr I Max resettale time: ms Max reak time: ms Micrologic. / 6. E tr (s). x 6 x 7. x It Off It On tsd (max resettale time) tsd (max reak time) ANSI Code Ii = In x Micrologic. / 6. E Other ranges or disale y changing long-time rating plug () () minutes efore and after tripping t off E F G.. H.9.9 J It on tr It off tsd Ii. I Max resettale time: ms Max reak time: ms ANSI Code N Ig = In x In y A A < In < A In u A Settings It Off It On tg (max resettale time) tg (max reak time) Micrologic 6. E A B C D DB36.eps Time delay (ms) at x (It Off or It On) Instantaneous Accuracy: ± % Time delay t Protection Long time ANSI Code 9 Current setting (A) = In x Tripping etween. and. x Time setting Time delay (s) Accuracy: to -3 % Accuracy: to - % Accuracy: to - % Thermal memory () to - % - () to -6 % Short time ANSI Code = x Accuracy: ± % Settings Time setting tsd (s) Other ranges or disale y changing long-time rating plug () () minutes efore and after tripping DB3.eps Long time ANSI Code 9 Current setting (A) Tripping etween. and. x Time setting Time delay (s) Accuracy: to -3 % Accuracy: to - % Accuracy: to - % Thermal memory () to - % - () to -6 % Instantaneous ANSI Code = x Accuracy: ± % Time delay DB3.eps Protection Micrologic. /. / 6. E Range. to. I, I, I3, IN Ig (6. E). to In. to. Current maximeters of I, I, I3, IN. to. Demand currents of I, I, I3, Ig Voltages V, V3, V3, VN, VN, V3N to 69 V Active power P 3 to kw Power factor PF to Demand power P demand 3 to kw Active energy Ep - GWh to GWh Note: all current-ased protection functions require no auxiliary source. The test / reset utton resets maximeters, clears the tripping indication and tests the attery. Accuracy ±. % ± % ±. % ±. % ±. % ± % ± % ± % ± % A-3

18 Functions and characteristics Micrologic control units Micrologic P "power" DB.eps Micrologic P control units include all the functions offered y Micrologic A. In addition, they measure voltages and calculate power and energy values. They also offer new protection functions ased on currents, voltages, frequency and power reinforce load protection in real time. Protection... + Protection settings The adjustale protection functions are identical to those of Micrologic A (overloads, short-circuits, earth-fault and earth-leakage protection). Fine adjustment Within the range determined y the adjustment dial, fine adjustment of thresholds (to within one ampere) and time delays (to within one second) is possile on the keypad or remotely using the COM option. IDMTL (Inverse Definite Minimum Time Lag) setting Coordination with fuse-type or medium-voltage protection systems is optimised y adjusting the slope of the overload-protection curve. This setting also ensures etter operation of this protection function with certain loads. Neutral protection On three-pole circuit reakers, neutral protection may e set using the keypad or remotely using the COM option, to one of four positions: neutral unprotected (P 3d), neutral protection at. (P 3d + N/), neutral protection at (P d) and neutral protection at.6 (P 3d +.6N). Neutral protection at.6 is used when the neutral conductor is twice the size of the phase conductors (major load imalance, high level of third order harmonics). On four-pole circuit reakers, neutral protection may e set using a three-position switch or the keypad: neutral unprotected (P 3d), neutral protection at. (P 3d + N/), neutral protection at (P d). Neutral protection produces no effect if the long-time curve is set to one of the IDMTL protection settings. Programmale alarms and other protection Depending on the thresholds and time delays set using the keypad or remotely using the COM option, the Micrologic P control unit monitors currents and voltage, power, frequency and the phase sequence. Each threshold overrun is signalled remotely via the COM option. Each threshold overrun may e comined with tripping (protection) or an indication carried out y an optional M6C programmale contact (alarm), or oth (protection and alarm). Load shedding and reconnection Load shedding and reconnection parameters may e set according to the power or the current flowing through the circuit reaker. Load shedding is carried out y a supervisor via the COM option or y an M6C programmale contact. Indication option via programmale contacts The M6C (six contacts) auxiliary contacts may e used to signal threshold overruns or status changes. They can e programmed using the keypad on the Micrologic P control unit or remotely using the COM option (BCM ULP) and RSU software. Communication option (COM) Long-time current setting and tripping delay. Overload signal (LED). 3 Short-time pick-up and tripping delay. Instantaneous pick-up. Earth-leakage or earth-fault pick-up and tripping delay. 6 Earth-leakage or earth-fault test utton. 7 Long-time rating plug screw. Test connector. 9 Lamp + attery test and indications reset. Indication of tripping cause. High-resolution screen. Measurement display. 3 Maintenance indicators. Protection settings. Navigation uttons. 6 Hole for settings lockout pin on cover. Note: Micrologic P control units come with a non-transparent lead-seal cover as standard. A- The communication option may e used to: remotely read and set parameters for the protection functions transmit all the calculated indicators and measurements signal the causes of tripping and alarms consult the history files and the maintenance-indicator register maximeter reset. An event log and a maintenance register, stored in control-unit memory ut not availale locally, may e accessed in addition via the COM option.

19 Earth fault Accuracy: ± % Time setting tg (s) Time delay (ms) at In or A (It Off or It On) Residual earth leakage (Vigi) Sensitivity (A) Accuracy: to - % Time delay Dt (ms) ANSI Code N Ig = In x In y A A < In < A In u A Settings tg (max resettale time) tg (max reak time) ANSI Code G IDn It Off It On Settings Dt (max resettale time) Dt (max reak time) Alarms and other protection Current Current unalance Max. demand current Earth fault alarm Voltage Voltage unalance Minimum voltage Maximum voltage() Power Reverse power Frequency Minimum frequency Maximum frequency Phase sequence Sequence (alarm) Max resettale time: ms Max reak time: ms Micrologic 6. P A B C D Micrologic 7. P off E F G.. H.9.9 J 7 3 Micrologic. / 6. / 7. P Threshold. to.6 Iaverage. In to In Delay to s to s It to % In(3) to s Uunalance Umin Umax ANSI Code to 3 % x Uaverage to s to Umax etween phases. to s Umin to etween phases. to s rp 3P to kw. to s Fmin Fmax L H to Fmax Fmin to Hz. to s. to s DØ Ø//3 or Ø/3/ s I P Threshold. to per phases kw to MW Delay % tr to % tr to 36 s Power Micrologic. / 6. / 7. P Micrologic. / 6. / 7. P Type of measurements Range Accuracy. to. ±. % Current maximeters of I, I, I3, IN Voltages V, V3, V3, VN, VN, V3N to 69 V ±. % Power factor PF ±% Frequency (Hz) DB3.eps ANSI Code 6 Iunalance Imax demand : I, I, I3, IN, Load shedding and reconnection Measured value Current Power DB.eps It Off It On tsd (max resettale time) tsd (max reak time) ANSI Code Ii = In x. DB.eps Time delay (ms) at (It Off or It On) Instantaneous Accuracy: ± % Time delay tr (s). x 6 x 7. x Micrologic. / 6. / 7. P Other ranges or disale y changing long-time rating plug () () SIT VIT EIT HVFuse DT minutes efore and after tripping DB6.eps Long time (rms) ANSI Code 9 Current setting (A) = In x Tripping etween. and. x Time setting Time delay (s) Accuracy: to -3 % IDMTL (EIT) Accuracy: to - % Accuracy: to - % IDMTL setting Curve slope Thermal memory () to - % - () to -6 % Short time (rms) ANSI Code = x Accuracy: ± % Time setting tsd (s) Settings + Micrologic. / 6. / 7. P DB7.eps Protection to. % (3) In y A 3 % () For 69 V applications, a step-down transformer must e used if the voltage exceeds the nominal value of 69 V y more A < In < A % than %. In u A % Note: all current-ased protection functions require no auxiliary source. Voltage-ased protection functions are connected to AC power via a voltage measurement input uilt into the circuit reaker. A-

20 Functions and characteristics Motor protection Micrologic. /.3 M electronic trip units Micrologic. /.3 M trip units provide uilt-in thermal and magnetic protection. They are used in -device motor-feeder solutions on Compact NSX to 63 circuit reakers with performance levels B/F/H/N/S/L. They provide protection for motors up to 3 kw at V against: short-circuits overloads with selection of a trip class (, or ) phase unalance. DB.eps Circuit reakers with a Micrologic. /.3 M trip unit include protection similar to an inverse-time thermal relay. They are comined with a contactor. PB3376.eps Protection... Settings are made using a dial. Overloads (or thermal protection): Long-time protection and trip class () Inverse-time thermal protection against overloads with adjustale pick-up. Settings are made in amperes. The tripping curve for the long-time protection, which indicates the time delay tr efore tripping, is defined y the selected trip class. Trip class (class) The class is selected as a function of the normal motor starting time. Class : starting time less than s. Class : starting time less than s. Class : starting time less than s. For a given class, it is necessary to check that all motor-feeder components are sized to carry the 7. starting current without excessive temperature rise during the time corresponding to the class. Short-circuits: Short-time protection () Protection with an adjustale pick-up. There is a very short delay to let through motor starting currents. Short-circuits: Non-adjustale instantaneous protection (li) Instantaneous protection with non-adjustale pick-up Ii. Phase unalance or phase loss (lunal) ( ) This function opens the circuit reaker if a phase unalance occurs: that is greater than the 3 % fixed pick-up Iunal following the non-adjustale time delay tunal equal to: vv.7 s during starting vv s during normal operation. Phase loss is an extreme case of phase unalance and leads to tripping under the same conditions. Indications Front indications Green Ready LED: flashes slowly when the circuit reaker is ready to trip in the event of a fault. Red alarm LED for motor operation: goes ON when the thermal image of the rotor and stator is greater than 9 % of the permissile temperature rise. Remote indications via SDTAM module Compact NSX devices with a Micrologic can e equipped with an SDTAM module dedicated to motor applications for: a contact to indicate circuit-reaker overload a contact to open the contactor. In the event of a phase unalance or overload, this output is activated ms efore circuit-reaker tripping to open the contactor and avoid circuit reaker tripping. This module takes the place of the MN/MX coils and an OF contact. SDTAM remote indication relay module with its terminal lock. Note: all the trip units have a transparent lead-sealale cover that protects access to the adjustment dials. A-

21 Micrologic. /.3 M Ratings (A) In at 6 C () 3 Circuit reaker Compact NSX Compact NSX Compact NSX - - Compact NSX Compact NSX L Overloads (or thermal protection): Long-time protection and trip class value depending on trip unit rating (In) and setting on dial tripping etween In = A = 6 3. and. In = A = In = A = In = A = In = A = 7 In = 3 A = In = A = Trip class as per IEC Time delay (s) tr. x for warm motor depending on selected trip class 6 x for cold motor 7. x for cold motor Thermal memory minutes efore and after tripping Cooling fan non-adjustale - motor self-cooled S Short-circuits: Short-time protection with fixed time delay accuracy ± % = x Time delay (ms) tsd non-adjustale Non-tripping time Maximum reak time 6 I Short-circuits: Non-adjustale instantaneous protection Ii non-adjustale accuracy ± % Time delay (ms) Non-tripping time Maximum reak time 3 Phase unalance or phase loss Iunal in % average current () > 3 % accuracy ± % Time delay (s) non-adjustale.7 s during starting s during normal operation () Motor standards require operation at 6 C. Circuit-reaker ratings are derated to take this requirement into account (see page B-). () The unalance measurement takes into account the most unalanced phase with respect to the average current. DB.eps DB66.eps Unalance of phase currents and voltages. to s Long start time limit Starting time % Motor starting and long starts. Motor-off zone Return Overrun. (Micrologic M) or Ilong (Micrologic 6 E-M) Additional technical characteristics Phase unalance An unalance in three-phase systems occurs when the three voltages are not equal in amplitude and/or not displaced with respect to each other. It is generally due to single-phase loads that are incorrectly distriuted throughout the system and unalance the voltages etween the phases. These unalances create negative current components that cause raking torques and temperature rise in asynchronous machines, thus leading to premature ageing. Phase loss Phase loss is a special case of phase unalance. During normal operation, it produces the effects mentioned aove and tripping must occur after four seconds. During starting, the asence of a phase may cause motor reversing, i.e. it is the load that determines the direction of rotation. This requires virtually immediate tripping (.7 seconds). Starting time in compliance with the class (Micrologic M) For normal motor starting, Micrologic M checks the conditions elow with respect to the thermal-protection (long-time) pick-up : current > % x (motor-off limit) overrun of. x threshold, then return elow this threshold efore the end of a s time delay. If either of these conditions is not met, the thermal protection trips the device after a maximum time equal to that of the selected class. Pick-up must have een set to the current indicated on the motor rating plate. Long starts (Micrologic 6 E-M) When this function is not activated, the starting conditions are those indicated aove. When it is activated, this protection supplements thermal protection (class). A long start causes tripping and is characterised y: current > % x (motor-off limit) with: either overrun of the long-time pick-up ( to x ) without return elow the pick-up efore the end of the long-time time delay ( to s) or no overrun of the long-time pick-up ( to x ) efore the end of the long-time time delay ( to s). Pick-up must have een set to the current indicated on the motor rating plate. This protection should e coordinated with the selected class. A-

22 Functions and characteristics Motor protection Micrologic 6 E-M electronic trip units PB3376.eps Micrologic 6.E-M is used in -device motor-feeder solutions. It provides the same protection as Micrologic M: short-circuits overloads with selection of the same trip classes (, or ), plus trip class 3 for starting of machines with high inertia. In addition, it offers specific motor-protection functions that can e set via the keypad. SDTAM remote indication relay module with its terminal lock. Note: all the trip units have a transparent lead-sealale cover that protects access to the adjustment dials. A-6 DB6 Protection The protection functions are identical to those of Micrologic M and can e fine-adjusted via the keypad. Access to setting modifications via the keypad is protected y a locking function that is controlled y a microswitch. The lock is activated automatically if the keypad is not used for minutes. Access to the microswitch is protected y a transparent lead-sealale cover. It is possile to scroll through settings and measurements with the cover closed. Overloads (or thermal), class and short-circuits The long-time, short-time and instantaneous functions are identical to those of Micrologic M. In addition, there is trip class 3 for long-time protection and a setting for self-cooled or fan-cooled motors ( ). Ground-fault protection (Ig) Residual type ground-fault protection with an adjustale pick-up Ig (with Off position) and adjustale time delay tg. Phase unalance or phase loss (lunal) This function opens the circuit reaker if a phase unalance occurs: that is greater than the Iunal pick-up that can e fine-adjusted from to % (3 % y default) following the tunal time delay that is: vv.7 s during starting vvadjustale from to seconds ( seconds y default) during normal operation. Phase loss is an extreme case of phase unalance and leads to tripping under the same conditions. Locked rotor (Ijam) This function detects locking of the motor shaft caused y the load. During motor starting (see page A-), the function is disaled. During normal operation, it causes tripping: aove the Ijam pick-up that can e fine-adjusted from to x in conjunction with the tjam time delay that can e adjusted from to 3 seconds. Under-load (Iund) This function detects motor no-load operation due to insufficient load (e.g. a drained pump). It detects phase undercurrent. During motor starting (see page A-), the function is always enaled. During normal operation, it causes tripping: elow the Iund pick-up that can e fine-adjusted from to.9 x in conjunction with the tund time delay that can e adjusted from to seconds. Long starts (Ilong) This protection supplements thermal protection (class). It is used to etter adjust protection to the starting parameters. It detects anormal motor starting, i.e. when the starting current remains too high or too low with respect to a pick-up value and a time delay. It causes tripping: in relation with a llong pick-up that can e fine-adjusted from to x in conjunction with the tlong time delay that can e adjusted from to seconds. (see "long starts" page A-) Display of type of fault On a fault trip, the type of fault (,, Ii, Ig, lunal, ljam), the phase concerned and the interrupted current are displayed. Indications Front indications Green Ready LED: flashes slowly when the circuit reaker is ready to trip in the event of a fault. Red alarm LED for motor operation: goes ON when the thermal image of the rotor or stator is greater than 9% of the permissile temperature rise. Remote indications via SDTAM or SDx module See description on page A- for SDTAM and page A-93 for SDx.