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IMM 8001/8002 – Digital Motor Protection Relay

ICE / CEE

____________________________________________________________________________________________
IMU307-1 GB Ind. B

83

5.14. UNDER VOLTAGE FOR RE-ACCELERATION [27RC]

Functions

The motors can be re-accelerated following a disturbance having affected the network voltage. During
their re-acceleration, they can absorb a current in the order of the starting current during a time close to
the starting time. The rotor stalling detection function [51STALL] must be inhibited, and the too long
start detection function [48] initialised. The re-acceleration condition can be created by a relay voltage
unit or a contact given by an external voltage relay (EL3 input).

Main characteristics

Operating level Urc< :

20 – 120 % Un in steps of 1 %

Time-delay t(Urc<) :

0.1-100 seconds in steps of 0.1 second

Note : The Urc< unit is active only, motor operating, during and after the start period.

When the voltage detection function is provided by an external relay (digital input EL3
used), the internal protection [27rc] must be deactivated.

When the function [27rc] is validated, the input EL3 must be not used (no connected or
always equal to zero Volt).

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Содержание IMM 8001

Страница 1: ...usion Restreinte Libre x Etat Projet Validé x MISES A JOUR Nom et Visa du rédacteur du vérificateur de l approbateur Traduction de la version Française G MANCIER F JAMINET Du MU307 1 ind C Ind Date Nature des mises à jour Rédac A 07 02 00 Edition de la version anglaise du MU307 1 ind B B 06 08 02 Mise à jour avec le MU307 1 ind C EN Réf Doc C n 2012 1 ...

Страница 2: ...PROTECTIONS CONTRÔLE C O M M ANDE IMM 8001 8002 USER S GUIDE ICE Protection Contrôle Commande 11 rue Marcel Sembat 94 140 Alfortville Tél 33 0 1 41 79 76 00 Fax 33 0 1 41 79 76 01 ...

Страница 3: ...UNICATION CONNECTION DB9 REAR SOCKET 19 3 10 1 0 20 mA current loop configuration 19 3 10 2 RS 485 configuration 19 3 11 COMMUNICATION CONNECTION DB9 FRONT SOCKET 20 4 OPERATOR DIALOGUE 21 4 1 FRONT PANEL 21 4 2 LOCAL OPERATOR DIALOGUE 22 4 2 1 Man machine interface general operation items 22 4 2 2 Measurements Present status Statistics 23 4 2 3 Protection parameters reference variables 23 4 2 4 C...

Страница 4: ...ALANCES PHASE LOSS 46 62 5 10 SHORT CIRCUIT PROTECTION 50 67 5 11 EARTH FAULT PROTECTION 51N 70 5 12 MINIMUM LOAD PROTECTION PUMP UNPRIMING 37 P I 74 5 13 UNDER VOLTAGE PROTECTIONS 27 27ST 79 5 14 UNDER VOLTAGE FOR RE ACCELERATION 27RC 83 5 15 OVER VOLTAGE PROTECTION 59 86 5 16 ALARM FOR TRIP LOOP FAULT SUPERVISION 89 6 COMMISSIONING ABNORMAL SITUATIONS 92 7 MAINTENANCE 94 7 1 BASIC CASE TEST 94 7...

Страница 5: ...ecific motor protection problems All the protections are detailed in the tables chapter 1 1 1 All the measurements are detailed in the tables chapter 1 1 2 Main features of the IMM 8000 relays most functions built into the same case many measurements energy counters digital signal processing fault diagnosis time stamped events for communications 4 output units using a matrix set up simple and user...

Страница 6: ...stalling after start Istl 51LR Rotor stalling during start Ilr 46 Current unbalance Ineg 50 Short circuit I 51N Earth fault inverse time I0 51N Earth fault definite time I0 37P I Loss of load P or I 27 Under voltage after start U 27ST Under voltage during start Ust 27RC Under voltage for re acceleration Urc 59 Over voltage low set level U 59 Over voltage high set level U Trip loop fault TSUP IMM 8...

Страница 7: ...e Phase phase voltage KV U31 Frequency Hz F Powers energies Active power K MW P unit according to value measurement on 4 quadrants Reactive power K MVAR Q unit according to value measurement on 4 quadrants Power factor cos θ Active energy K M GWh Wa unit according to value Exported reactive power K M GVARh Wr unit according to value Imported reactive power K M GVARh Wr unit according to value Temp...

Страница 8: ...d 1 indicates that the digital input is put into serviced EL 2 status can only be read if EL 2 is in service 1 1 4 Functions related to start control orders These functions are initialised by a start control order that the relay detects at the beginning of motor start internal or external control order 3 functions are put into serviced only during the start period the 48 51LR 27ST functions 2 func...

Страница 9: ...0 V code Ba or 85 to 255 V code Bb local man machine interface language English French code Ca or another language please consult us communication interface current loop code Da or RS 485 code Db case presentation projecting rear connection code Fa or flush rear connection code Fb 1 3 CONNECTION DIAGRAM RATINGS TO BE CONFIGURED ON SITE Rated value parameters with respect to connection nominal freq...

Страница 10: ...d to attach them to the male connectors of the withdrawable electronic module A grey frame around the front panel is provided with an upper and a lower recess It makes relay inserting and withdrawing easier A locating pin located at the rear of the withdrawable module is used to position the electronic module in the basic case The two parts are locked together by means of a knurled screw To insert...

Страница 11: ...8002 Digital Motor Protection Relay ICE CEE ____________________________________________________________________________________________ IMU307 1 GB Ind B 9 2 2 OVERALL DIMENSIONS AND MECHANICAL CUT OUT DRAWING ...

Страница 12: ...___________________________ IMU307 1 GB Ind B 10 3 ELECTRICAL INSTALLATION 3 1 GENERALITY From the connection diagrams below and the communication network diagram as required make the different connections using the physical identifications of the terminal blocks given in paragraph 3 3 3 2 CONNECTION DIAGRAMS IMM 8001 ...

Страница 13: ...IMM 8001 8002 Digital Motor Protection Relay ICE CEE ____________________________________________________________________________________________ IMU307 1 GB Ind B 11 IMM 8002 ...

Страница 14: ...t hot point IN 5A residual connection Earth fault hot point IN 1A ring CT or residual connection Earth fault common IN 5A residual connection Earth fault common IN 1A ring CT or residual connection Hot point phase 3 IN 5A Hot point phase 3 IN 1A Common phase 3 IN 5A Common phase 3 IN 1A Hot point phase 1 IN 5A Hot point phase 1 IN 1A Common phase 1 IN 5A Common phase 1 IN 1A Device case ground RTS...

Страница 15: ...5 DI NC contact b 1 13 13 EL6 DI NO contact p 1 12 12 EL control DI Common contact p 1 11 11 Common EL DI NC contact p 1 10 A B 10 N C NO contact t 1 9 9 RTD 1 connection Common contact t 1 8 8 RTD 1 connection NC contact t 1 7 7 RTD 1 hot point Common contact w 1 6 6 RTD 2 connection NC contact w 1 5 5 RTD 2 connection Output common p s 24 V 4 4 RTD 2 hot point Output 24V p s 24 V 3 3 RTD 3 conne...

Страница 16: ... terminal block 3 5 CONNECTION OF THE CURRENTS PHASES EARTH FAULT Phase currents I1 and I3 Choose the suitable relay current inputs depending on the secondary CTs nominal value For each phase the relay has a 1A input and a 5A input see chapter 3 2 The parameter range of the relay allows a CT primary nominal value between 10A and 10 000 A Characteristics of recommended current transformers 5 VA Cla...

Страница 17: ... A Ist starting current in multiples of In Io earth fault protection operating level in A R relay relay input resistance 0 2 Ohm Type of resistor to be used High power adjustable wire wound resistor with a rheostat type connection 0 5 Ohms 240 W for secondary CTs with IN 5A 0 20 Ohms 240 W for secondary CTs with IN 1A Choose the suitable earth fault input of the relay depending on the secondary no...

Страница 18: ...e connection diagram it is imperative to run the ground screening through the ring CT again to avoid measurement of any spurious current flowing in the screen Important note The equipment is differently configured depending on the type of earth fault current detection with residual connection 3CTs or ring CT ZCT The label with the characteristics on the front panel defines the option To change con...

Страница 19: ...tion unit 3 RTDs PT 100 or NI 100 or NI 120 or CU 10 Use of 3 wires per RTD is recommended so that the relay automatically compensates for the wiring length The maximum resistance of the wiring will be less than 80 Ω for platinum and nickel RTDs and less than 8 Ω for copper RTDs Note A wire of diameter 0 5 mm has a resistance of about 87 Ohms at 20 C for 1 km long Use of shielded cables is recomme...

Страница 20: ...tary local acknowledgement Enabling or disabling of latches for P is done in the SUPERVISION item and acknowledgement of latches is done at relay front panel level see chapter 4 2 9 Relays A and B are normally used as alarm relays Relay W is the Watchdog alarm relay 3 9 DIGITAL INPUT CONNECTION The IMM 8000 relay has 6 digital inputs EL1 to EL6 and a control digital input Cnt used to make sure tha...

Страница 21: ...ays Loop diagram 3 10 2 RS 485 configuration With this connection mode each relay is wired in parallel with a shielded pair to a RS232 RS485 converter The cable used will have to be shielded and its characteristic impedance will be 120 Ohms The relay shielding will be connected to the ground on the converter side only The cable length will be less than 100m A 120 Ohms W minimum resistor must be wi...

Страница 22: ... 11 COMMUNICATION CONNECTION DB9 FRONT SOCKET This connection is provided for use of parameter assignment aiding software PROSETTING please consult us Connection diagram A RS232 RS485 converter 9 5 8 3 2 1 6 Communication socket DB9 at rear of relay PC B 150 A B B A A B IMM N 1 9 5 8 3 2 1 6 Communication socket DB9 at rear of relay A B IMM N X GND Ω Ω 150 150 Ω 1 2 3 4 5 6 9 Rx Tx ...

Страница 23: ...U307 1 GB Ind B 21 4 OPERATOR DIALOGUE 4 1 FRONT PANEL Alphanumeric display LCD 2 x 16 characters 4 navigation keys for man machine interface CLEAR key ENTER KEY Reset key for emergency restarting Key to enter parameter setting mode Communication DB9 socket Front panel Prosetting 7 function LED Green LED parameter setting mode Red LED watchdog fault ...

Страница 24: ... operation items The man machine interface has several levels 4 maximum Keys and must be used for level navigation To change levels keys and must be used Key is used for direct access to the beginning of a chapter The CLEAR key is used to return to the first box of the first level MEASUREMENT box Level 1 is the single re looped level return to the chapter beginning at level end Examples Navigation...

Страница 25: ...ts Currents current measurements thermal state Voltages voltage measurement frequency Powers energies power measurements power factor energies Temperatures temperature measurements channels 1 2 and 3 IMM 8002 Present status Start status time and current of last start information related to function 5 advised heating time constant Digital input status state of the 6 digital inputs Relay output stat...

Страница 26: ... Parameter modification example put into service function 46 and route it to relay T in the table 1 modify the value of the operating level for the negative phase sequence unit Ineg Æ change from 0 25 In to 0 40 In have access to protection function 46 in the table 1 MEASUREMENTS PRESENT STATUS STATISTICS PARAMETERS TABLE1 TEMPERATURE RTDS26 THERMAL IMAGE 49 STARTS 48 51LR5 CURRENTS 46 50 51N 51ST...

Страница 27: ...erating level 1 Ineg 0 25 In Press the ENTER key for modification mode entry Operating level 1 Ineg 0 25 In Operating level 1 Ineg 0 40 In Operating level 1 Ineg 0 40 In digit 5 or the last digit is grey and blinks Increment 5 by 5 step value with key or Change to digit 2 with key then increment up to 4 with key then decrement 5 down to 0 with key Press the ENTER key to validate the modification T...

Страница 28: ...I 46 Short circuit 50 Earth fault 51N Stalling during operation 51STALL Voltages 27 59 Under voltage 27 27ST 27RC Over voltage 59 Loss of load 37 Control 86 EL2 Supervision P latches 86 Rated values General protection related values table used In this chapter we found the general settings of the protection primary rated voltage of the PT rated voltage of the relay secondary rated voltage of the PT...

Страница 29: ...t password When a password is in use only access in the read mode is authorised Caution if the password is lost or forgotten an all purpose password which is 8000 may be used When leaving the factory the programmed password is 0000 Password programming and clearing Programming have access to the Configuration Resets item have access to the Password sub item press the Param key to go in the paramet...

Страница 30: ...mal state and function 5 66 start authorisation by t and T Resetting can be done by enabling the EL5 input Emergency restart or EL6 input Thermal state reset or by making the following operation with the keyboard display the thermal state θ for instance simultaneously press ERST and during at least 5 seconds the measured thermal state must change to 0 00 4 2 9 Latching of relay P Relay P can be la...

Страница 31: ...n there is a trip see functions protection table chapter 1 1 1 the Internal Trip or External Trip red indicator LED illuminates and the trip related information appear on the relay display function concerned value if any monitored on fault occurrence The display is stored together with illumination of the indicator LED Pressing the CLEAR key clears the message and returns the relay to the previous...

Страница 32: ...d 2 The other parameters are single Rated values communication parameters The table used table 1 or 2 can be modified in the Rated values item The 2 tables can be read and modified at any time For each parameter of each table the table number 1 or 2 appears on top to the right Always check the present table before modifying a parameter 4 3 REMOTE OPERATOR DIALOGUE TRACE The IMM 8000 relays have 2 ...

Страница 33: ...e is well plugged in and screwed if the relay is placed in a communication loop Caution Do not permanently inject more than 4 IN or 2 INo and 20 IN or 10 INo during 10s so as not to overload the current transformers during the tests The contact of the relay under test will preferably cut off the injection case automatically Relay energization The relay performs the following sequences on auxiliary...

Страница 34: ...he tests it is preferable to inhibit all the functions and to perform the tests function by function All the protections used will be put into service at the end of the tests Note the parameters set for the nominal current and voltage must be such that the power does not exceed 100 MW 5 2 TEST EQUIPMENT The relay tests can be performed with single phase or three phase current as chosen Therefore i...

Страница 35: ... during normal operation and τc on cooling The equivalent thermal current Ith is calculated with the following formulae Ith I Pos Ki I Neg for I Pos 3 2 In Ith 3 2 I Pos Ki I Neg for I Pos 3 2 In I Pos positive phase sequence current flowing through the machine I Neg negative phase sequence current flowing through the machine In machine rated current Ki weighing factor for the negative phase seque...

Страница 36: ...40 C The thermal state θs is permanently compared with the thermal state θ evaluated by the currents The operating level Ith is corrected in the following way Ith 1 14 x θ θs for θs θ There is no correction if θ 15 Note The mean value is done on 1 2 or 3 RTDs depending on the number of RTDs used Main characteristics Thermal state The thermal state θ of the machine is obtained with exponential smoo...

Страница 37: ...to 6 Tau Operation curves according to IEC 255 8 see figure below t s Tau Ln 07 1 In Ith In Ip In Ith Tau or Tau c time constant expressed in minutes Ith equivalent thermal current In machine rated current Ip pre load current 1 07 asymptotic trip level Ln neperian logarithm Saving of the thermal state in the event of the auxiliary voltage switch off during about 30 min Thermal correction by IMM 80...

Страница 38: ... Relay ICE CEE ___________________________________________________________________________________________ _ IMU307 1 GB Ind B 36 Cold characteristics for different time constants Multiples of setting Tau 180 120 60 30 20 16 14 12 10 8 6 4 ...

Страница 39: ...______________________________________________ _ IMU307 1 GB Ind B 37 Teta 0 40 60 80 100 To obtain the operating time corresponding to other values for Tau multiply the times read on these curves by setted Tau 12 Characteristic for Tau 12 min with different prior thermal states Multiples of setting ...

Страница 40: ..._________________________________________________ _ IMU307 1 GB Ind B 38 Characteristic of the thermal unit alarm set to 80 and 100 of Tau 12 min Multiples of setting 100 80 To obtain the operating time corresponding to other values for Tau multiply the times read on these curves by setted Tau 12 ...

Страница 41: ...TING STATISTICS PARAMETERS TABLE 1 PARAMETERS TABLE 2 TEMPERATURE RTDs 26 THERMAL IMAGE 49 IMM 8002 IMM 8001 49 Ith 1 OFF Heating Time Ct 1 Tau 20 min Cooling Time Ct 1 TauC 60 min 49 Ith Al 1 OFF Thermal Alarm 1 Ith A 1 00 θ RANGES 49 Ith 1 OFF RANGE ON OFF T P A B 49 Ith Al 1 OFF RANGE ON OFF T P A B Heating Time Ct 1 Tau 20 min RANGE 4 to 180 min STEP 1 min Thermal Alarm 1 Ith A 1 00 θ RANGE 0 ...

Страница 42: ... check at 2 In function 49 1 Putintoservicetheprotection androuteittoachosenunit NotethevalueofparameterisedtimeconstantTau Usethecontactofthisunittostopthetimer Connectthecurrentgeneratoraccordingtothedesiredconnection with three phase correctly balanced or with single phase Preset the injected current to 2 In then cut off ResetthethermalstatewithERSTorEL5 EL6 Injectthecurrent Ifnecessary checkch...

Страница 43: ...ed in the following way Apply current so as to cause changes in the thermal state up to 100 then stabilise the thermal state at this value Therefore we must have θ 1 00 Cause variations in the temperature measured by the RTD The thermal unit operating level depends on the measured temperature when θ s is greater than θ The operating level Ith decreases and becomes equal to 100 when the measured te...

Страница 44: ... used is obtained with parameter setting There are 2 levels for each temperature channel a trip level and an alarm level An alarm device detects open wire or short circuited RTDs situations independently channel by channel Main characteristics functions protection against temperature rises with RTD 1 trip level 26 Sx 1 1 alarm level 26 Sx 2 type of RTD which can be used selection with parameter se...

Страница 45: ...00 100 103 9 107 79 111 67 115 54 119 39 123 24 127 07 130 89 134 7 138 5 142 29 146 06 149 82 153 58 157 32 161 04 164 76 168 47 172 46 175 84 120 127 17 134 52 142 06 149 79 157 74 165 9 174 25 182 84 191 64 200 64 209 85 219 29 228 96 238 85 248 95 259 3 269 91 280 77 291 96 303 46 100 105 97 112 1 118 38 124 82 131 45 138 25 145 2 152 37 159 7 167 2 174 87 182 75 190 8 199 04 207 45 216 08 224...

Страница 46: ...GE 49 RTD 1 1 26 S1 PT100 26 S1θ1 1 OFF Temp Op level 1 S1θ1 160 C 26 S1θ2 1 OFF Temp Op level 1 S1θ2 140 C RTDs 2 and 3 RANGES RTD assignment Wiring defect RTD 1 1 26 S1 PT100 RANGE Nothing PT100 Ni100 Ni120 Cu10 Wires S1 1 OFF RANGE ON OFF T P A B identical for RTDs 2 and 3 26 S1θ1 1 OFF RANGE ON OFF T P A B Temp Op level 1 S1θ1 160 C RANGE 2 to 200 C STEP 2 C Correction with RTDs RTDs in servic...

Страница 47: ...mic value up to the operating level If need be check the value of the corresponding temperature on the display when the test is performed Alarm level check Put into service the protection and route it to a chosen unit Note the value of the operating level Sx θ2 Gradually increase the ohmic value up to the operating level If need be check the value of the corresponding temperature on the display wh...

Страница 48: ...ng level fixed return difference equal to 6 Too frequent starts 5 66 The user sets parameters for the number N of allowed starts during a given period t If the number N is reached during a period t then any new attempted start is inhibited during time T N maximum number of starts 1 8 starts in steps of 1 t authorisation period for N starts 15 60 minutes in steps of 1 min T inhibit period for anoth...

Страница 49: ... following conditions tst setted start time Ist setted starting current θd thermal state start inhibit If immediate restart of the machine is required we may be led to increase the heating time constant Tau until Tau Tau A is obtained However it is required to know that a value greater than the machine time constant no longer provides a truly efficient protection against overloads Note When Tau A ...

Страница 50: ...t level 1 θdm 1 00 θ 5 66 5 66 1 OFF Max starts Nb 1 N 3 Start author t 1 t 15 min Start inhibit T 1 T 15 min 5 27 59 5 27 1 OFF Under voltage 1 U 0 85 Un Over voltage 1 U 1 10Un Author Time 1 tU 3 0 s RANGES 5 49 5 66 5 27 59 5 49 1 OFF RANGE ON OFF T P A B 5 66 1 OFF RANGE ON OFF T P A B 5 27 1 OFF RANGE ON OFF T P A B Inhibit Operating level 1 θdm 1 00 θ RANGE 0 40 to 1 00 STEP 0 01 Max starts ...

Страница 51: ...t of unit P or other must be used In the event of start inhibit the chosen unit is used and the contact is open Check of authorisation by thermal state unit Put into service the function and route it to authorisation unit P or another unit as selected Note the value of θdm Connect the current generator according to the connection used Inject a current clearly greater than In to cause an increase i...

Страница 52: ...delay is put into serviced during return to the authorised range Changeover to the inhibited range is slightly timed to about 0 3 s Preset the voltage to within the range formed by the 2 operating levels Cut off the injection Operating level U passed Restore voltage the Start Function indicator LED illuminates when the displayed operating level is reached the Start Function indicator LED illuminat...

Страница 53: ...urrent Ist during tst Or simulate start by applying 24V to the EL1 input wire between terminals A3 and B18 Number of starts limitation unit check Check of maximum start number N and time T Put into service the unit and route it to authorisation unit P or another unit as selected Note the value of N Connect the current generator according to the desired connection deduce M Preset the current to at ...

Страница 54: ...e equal to twice the parameterised starting time i e 2 tst or during the actually measured starting time td with current analysis when configured in Ipos current automatic detection Note time delay 2 tst is reinitialised under re acceleration conditions the relay considers that start occurred when the Ipos current less than 12 of In during at least 0 1s becomes greater than 70 of In in less than 0...

Страница 55: ...tection Relay ICE CEE ____________________________________________________________________________________________ IMU307 1 GB Ind B 53 Too long start unit X Ist Ist Motor starting current tst Motor starting time Starting point at Un ...

Страница 56: ... OF PROTECTION AGAINST TOO LONG STARTS ANSI code 48 PARAMETER SETTING STATISTICS PARAMETERS TABLE 1 PARAMETERS TABLE 2 THERMAL IMAGE 49 STARTS 48 51LR 5 MOTOR START CHARACTERISTICS START RE ACC DETECTION TOOLONGSTART 48 I Start 1 Ist 5 0 In Startingtime 1 tst 7 0 s 48 Ist 1 OFF RANGES 48 Ist 1 OFF RANGE ON OFF T P A B Setting 1 Ist 5 0 In RANGE 2 to 10 In STEP 0 1 In Time Delay 1 tIst 7 0 s RANGE ...

Страница 57: ...value Put into service the protection and route it to a chosen unit Note the adjustment value of starting current Ist Note the adjustment value of starting time tst Connect the current generator according to the desired connection deduce M Preset the current to be injected to the displayed starting current by taking M into account so that IPos In Ist I Ist x M If necessary check the value of IPos ...

Страница 58: ...riod 2 tst programmed or td measured the protection against rotor stalling is provided by a definite time overcurrent unit Main characteristics Operating logic enabling after a time equal to twice the setted starting time tst or the starting time actually measured td reset instantaneous under restart or re acceleration conditions settings operating level 51 Istl 2 to 5 In steps of 0 1 In time dela...

Страница 59: ...F ROTOR STALL PROTECTION AFTER START ANSI code 51STALL PARAMETER SETTING STATISTICS PARAMETERS TABLE 1 PARAMETERS TABLE 2 STARTS 48 51LR 5 CURRENTS 46 50 51N 51STL EARTH FAULT 51 N STALL WHILE RUN 51STL 51 Istl 1 OFF Operating level 1 Istl 2 5 In Time delay 1 tIstl 1 0 s RANGES 51_Istl 1 OFF RANGE ON OFF T P A B Operating level 1 Istl 2 5 In RANGE 2 to 5 In STEP 0 1 In Time delay 1 tIstl 1 0 s RAN...

Страница 60: ...it for a time greater than 2 tst The rotor stalling after the start period is now permanently activated It will be inhibited when the current is cut off or when EL1 is deactivated Check of overcurrent unit Check of operating level Istl Put into service the protection and route it to a chosen unit Note the value of operating level Istl Note the value of time delay tIstl With the current generator c...

Страница 61: ...tor movement occurs The IMM 8000 relays have a digital input with a contact used to start the motor if after an adjustable time delay the signalling contact has no changed status and the motor absorbs an Ipos positive phase sequence current greater than 1 5 In Note that rotation sensors at shaft end are sometimes used They generate a signal proportional to the speed and allow its permanent supervi...

Страница 62: ...U307 1 GB Ind B 60 DISPLAY OF LOCKED ROTOR PROTECTION DURING START ANSI code 51LR PARAMETER SETTING STATISTICS PARAMETERS TABLE 1 PARAMETERS TABLE 2 THERMALIMAGE1 49 STARTS 48 51LR 5 MOTORSTART CHARACTERISTICS START RE ACC DETECTION TOOLONGSTART LOCKED ON START 51LR Time delay 1 tlIr 4 0 s 51 Ilr 1 OFF RANGES 51 _Ilr 1 OFF RANGE ON OFF T P A B Time delay 1 tIlr 4 0 s RANGE 1 to 100s STEP 0 1 s ...

Страница 63: ...stalling during the start period Check of operating level Ilr Put into service the protection and route it to a chosen unit Note the value of the operating level which is fixed and equal to 1 5 In Note the adjustment value of time delay tIlr Connect the current generator according to the desired connection deduce M Preset the current to be injected to 1 2 In by taking M into account I 1 2 In x M C...

Страница 64: ...minal load 0 7 In Ineg 1 5 In off load 0 15 In Ineg 0 4 In on starting Ineg 3 2 Irb 0 866 Irb with Irb stalled rotor current When a resistive unbalance fault occurs in the motor it is interesting to have a device which detects the flow of negative sequence currents to eliminate it within a shortest period than that provided by the fuses However the response time of the unit must remain compatible ...

Страница 65: ...______________ IMU307 1 GB Ind B 63 Main characteristics adjustments operating level 46 INeg 0 15 to 0 50 In steps of 0 05 In minimum response time tINeg min 0 5 to 10 s steps of 0 1s operating curve see figure below time current characteristics t s In INeg CK with max time 50 s K adjustment In machine In CT C 8 to 40 s steps of 1s ...

Страница 66: ...Motor Protection Relay ICE CEE ____________________________________________________________________________________________ IMU307 1 GB Ind B 64 Negative phase sequence component unit Max setting of tmin Min setting of tmin ...

Страница 67: ...ES ANSI code 46 PARAMETER SETTING STATISTICS PARAMETERS TABLE 1 PARAMETERS TABLE 2 STARTS 48 51LR 5 CURRENTS 46 50 51N 51STL UNBALANCE I 1 46 46 Ineg 1 OFF 0perating level 1 Ineg 0 20 In Time Constant 1 C 20 s Mini Response Time 1 tmin 2 0 s RANGES 46 Ineg 1 OFF RANGE ON OFF T P A B Operating level 1 Ineg 0 20 In RANGE 0 15 to 0 5 In STEP 0 05 In Time Constant 1 C 20 s RANGE 8 to 40 s STEP 1 s Min...

Страница 68: ...ting operating level tmin curve minimum time Use the contact of this unit to stop the timer Connect the current generator according to the desired connection deduce M Preset the current to be injected to In x M then cut it off If necessary check the value Ineg In on the display Inject the current Other points can be deduced from the equation or the previous curves especially the minimum response t...

Страница 69: ...Pos the amplitude of which is evaluated The current operating level is automatically adjusted with respect to parameterised starting current Ist When put into serviced the protection operates during the start period as well as after the start period Main characteristics Measurement overcurrent protection with Inst response time one operating level automatically adjusted to 1 4 times the starting c...

Страница 70: ..._______________________________________________ IMU307 1 GB Ind B 68 DISPLAY OF PROTECTION AGAINST SHORT CIRCUITS ANSI code 50 PARAMETER SETTING STATISTICS PARAMETERS TABLE 1 PARAMETERS TABLE 2 STARTS 48 51LR 5 CURRENTS 46 50 51N 51STL UNBALANCE 1 46 SHORT CIRCUIT 50 50 I 1 OFF RANGE 50 I 1 OFF RANGE ON OFF T P A B fixed operating level 1 4 Ist ...

Страница 71: ...There is no time delay The protection response time is about 70 ms Check of overcurrent unit Check of fixed operating level I Put into service the protection and route it to a chosen unit Note the values of the operating level which is fixed and equal to 1 4 Ist Connect the current generator according to the desired connection deduce M Gradually increase the current up to the operating level by ta...

Страница 72: ...n during transient operation affecting the motor starts current supply to a defective device upstream etc In this case the operating curves have a inverse time characteristic with constant time from ten times operating level Io The figure below shows the response curves of this unit the high set is mainly used for the quick and sensitive detection of earth faults when the relay is connected to a r...

Страница 73: ...IMM 8001 8002 Digital Motor Protection Relay ICE CEE ____________________________________________________________________________________________ IMU307 1 GB Ind B 71 Earth fault protection unit ...

Страница 74: ...IO 1 OFF Operating level 1 IO 0 100 INO Time delay 1 tIO 1 00 s 51N I0 1 OFF Operating level 1 IO 0 50 INO Time delay 1 tIO 0 25 s RANGES 51N IO 1 OFF RANGE ON OFF T P A B 51N IO 1 OFF RANGE ON OFF T P A B Operating level 1 IO 0 100 INO RANGE 0 1 to 1 6 IN STEP 0 05 INResidual connection 3 CTs Operating level 1 IO 0 50 INO RANGE 0 1 to 1 6 IN STEP 0 05 INResidual connection 3 CTs RANGE 0 01 to 0 1...

Страница 75: ...s not less than 250 ms when function 50 I is disabled Check of operating level Io Very gradually increase the current up to operating level Io Check of high set earth fault unit Check of operating level Io Put into service the protection and route it to the chosen unit Note the values of operating level Io of the time delay tIo Gradually increase the current up to operating level Io If necessary c...

Страница 76: ...ection against pump unpriming by means of an active underpower unit P This function if put into serviced is operational after an enabling time delay tP on activated on motor starting The underpower protection is disabled on motor stop Main characteristics Adjustments Operating level P 10 50 of Sn Un In 3 in steps of 1 Sn Time delay t P 1 100 seconds in steps of 0 1 second Enabling time delay after...

Страница 77: ..._______________________________________________________ IMU307 1 GB Ind B 75 Main characteristics Adjustments Operating level I 15 70 of In in steps of 1 In Time delay tI 1 100 seconds in steps of 0 1 second Enabling time delay after Start detection tI on 1 1000 seconds in steps of 1 second ...

Страница 78: ...37P 1 OFF Operating level 1 P 0 1 Sn Time delay 1 tP 3 0 s Inhibit Time 1 tP on 30 s or 37I 1 OFF Operating level 1 I 0 15 In Time delay 1 tI 3 0 s Inhibit Time 1 tI on 30 s RANGES P I 37 P 1 OFF RANGE ON OFF T P A B 37 I 1 OFF RANGE ON OFF T P A B Operating level 1 P 0 1 Sn RANGE 0 1 to 0 5 Sn STEP 0 01 Sn Operating level 1 I 0 15 In RANGE 0 15 to 0 70 In STEP 0 01In Time delay 1 tP 3 0 s RANGE 1...

Страница 79: ...abling time delay tP on is started When it is ended function 37P is putintoserviced Checkofunderpowerunit CheckofoperatinglevelP Putintoservicetheprotection androuteittoachosenunit Note the value of operating level P Note the value of the tripping time delay tP Notethevalueoftheenablingtime delay tP on Withthecurrentgeneratorconnectedaccordingtothedesiredconnection deduceM Pre setthecurrenttobeinj...

Страница 80: ...ent unit Check of operating level I Put into service the protection and route it to a chosen unit Note the value of operating level I Note the value of time delay tI Note the value of time delay tI on With the current generator connected according to the desired connection deduce M Preset the current to be injected to 1 5In by taking M into account Cut off the current then inject it to simulate st...

Страница 81: ...of the starting time or sometimes in motor chattering During operation where these conditions require power load shedding of some machines before restarting to avoid a network collapse or high inertia machine stop before subsequent complete restart Therefore the IMM 8000 relays are fitted with a under voltage unit during the starting period 27ST and a under voltage unit 27 during motor normal oper...

Страница 82: ...TERS TABLE 1 PARAMETERS TABLE 2 CURRENTS 46 50 51N 51STL VOLTAGES 27 59 UNDER VOLTAGE 27 27ST 27RC 27 U 1 OFF Operating level 1 U 0 80 Un Time delay 1 tU 3 0 s 27 Ust 1 OFF Operating level 1 Ust 0 80 Un Time delay tust 3 0 RANGES U Ust 27 U 1 OFF RANGE ON OFF T P A B 27 Ust 1 OFF RANGE ON OFF T P A B Operating level 1 U 0 80 Un RANGE 0 2 to 1 2 Un STEP 0 01 Un Operating level1 Ust 0 80 Un RANGE 0 ...

Страница 83: ... wire between terminals A3 and B18 and wait for a time greater than 2tst The under voltage function after the start period is now permanently active This function is inhibited when the current is cut off or when EL1 is deactivated Check of under voltage unit after start Check of operating level U Put into service the protection and route it to a chosen unit Note the value of operating level U Chec...

Страница 84: ...als A3 and B18 The under voltage function during start is active during twice the parameterised starting time i e 2tst Check of under voltage unit during start Check of operating level Ust Put into service the protection and route it to a chosen unit Note the value of operating level Ust Note the value of tst the function can be tested during 2 tst Apply a voltage greater than displayed operating ...

Страница 85: ...on function 51STALL must be inhibited and the too long start detection function 48 initialised The re acceleration condition can be created by a relay voltage unit or a contact given by an external voltage relay EL3 input Main characteristics Operating level Urc 20 120 Un in steps of 1 Time delay t Urc 0 1 100 seconds in steps of 0 1 second Note The Urc unit is active only motor operating during a...

Страница 86: ...LAY OF UNDER VOLTAGE PROTECTION FOR RE ACCELERATION code 27RC PARAMETER SETTING STATISTICS PARAMETERS TABLE 1 PARAMETERS TABLE 2 CURRENTS 46 50 51N 51STL VOLTAGES 27 59 UNDER VOLTAGE 27 27ST 27RC 27 Urc 1 OFF Operating level 1 Urc 0 8 Un Time delay 1 tUrc 3 0 s RANGES 27 Urc 1 OFF RANGE ON OFF T P A B Operating level 1 Urc 0 80 Un RANGE 0 2 to 1 2 Un STEP 0 01 Un Time delay 1 tUrc 0 1 s RANGE 0 1 ...

Страница 87: ...d B18 The under voltage for re acceleration function is now permanently active This function is inhibited when the current is cut off or when EL1 is deactivated Check of under voltage for re acceleration unit Check of operating level Urc Put into service the protection and route it to a chosen unit Note the value of operating level Urc Note the value of 2tst Apply a voltage greater than displayed ...

Страница 88: ...ge rises are detected by the IMM 8000 relays by means of a over voltage unit 59 with 2 levels 1 low set level 1 high set level permanently monitoring the voltage motor operating or stopped during and after start Main characteristics Low set level U 70 150 Un steps of 1 Un Low set time delay tU 0 1s to 100s steps of 0 1 s High set level U 70 150 Un steps of 1 Un High set time delay tU 0 1s to 100s ...

Страница 89: ...ARAMETERS TABLE 2 CURRENTS 46 50 51N 51STL VOLTAGES 27 59 UNDER VOLTAGE 27 27ST 27RC OVERVOLTAGE 59 59 U 1 OFF Operating level 1 U 1 10 Un Time delay 1 tU 3 0 s 59 U 1 OFF Operating level 1 U 1 15 U n Time delay 1 tU 0 1 RANGES 59 1 OFF RANGE ON OFF T P A B 59 1 OFF RANGE ON OFF T P A B Operating level 1 U 1 10 Un RANGE 0 7 to 1 5 Un STEP 0 01 Un Operating level 1 U 1 15 Un RANGE 0 7 à 1 5 Un STEP...

Страница 90: ...en restore it Check of high set for over voltage unit Check of operating level U Put into service the protection and route it to a chosen unit Note the value of operating level U Gradually increase the voltage up to operating level U If necessary check the U31 value on the display during the injection Check of time delay tU Preset the voltage to 1 2 times the displayed operating level Cut off the ...

Страница 91: ... If after the time delay has elapsed the contact of the switching device reporting motor stop has not changed status or if the positive phase sequence current Ipos is greater than 2 In the IMM 8000 relay sends an alarm The user can set parameters for an output unit to transmit this alarm or possibly send this control order to a circuit breaker upstream This supervision makes it possible to detect ...

Страница 92: ...___________________________________ IMU307 1 GB Ind B 90 DISPLAY OF PROTECTION FOR TRIP LOOP FAULT SUPERVISION PARAMETER SETTING STATISTICS PARAMETERS TABLE 1 PARAMETERS TABLE 2 LOSS OF LOAD 37 SUPERVISION DI2 1 OFF Sup 1 OFF Time delay 1 tSup 0 10 s Latching P 1 OFF RANGE Sup 1 OFF RANGE ON OFF T P A B Time delay 1 tSup 0 10 s RANGE 0 10to1 00s STEP 0 05s ...

Страница 93: ...esent after the fault there is a trip loop fault problem Check of trip loop supervision unit Put into service the supervision unit and route it to a chosen unit Put into service a unit affected by a current fault and route it to a chosen unit Note value tSup Connect the current generator according to the desired connection Inject a current to cause the fault If the current is not cut off after the...

Страница 94: ...he parameterised frequency The auxiliary voltage is in the range indicated on the label The rear connectors are fully plugged in and screwed The trip loop is correct as well as the control orders and signallings The connection complies with the diagram Pay attention to the order of rotation of the phases and to the CT and PT connection directions On the connection diagram the points represent the ...

Страница 95: ...ersal for a phase Ipos 0 577 I Ineg 1 15 I direction reversal for phase direction of rotation reversal Ipos 1 15 I Ineg 0 577 I If the present value seems incorrect it is required to check the connection direction of the current transformers Verification of voltage circuit connection The connection of the voltage circuit which corresponds to the 2 currents is possible by consulting the measured ac...

Страница 96: ...his basic case The analogue signals delivered by the basic case to the electronic module run through two DB9 sockets female socket on the basic case male plug on the electronic module To test the signals delivered by the transformers refer to the connection and to the values noted below Signal amplitude and identification Db9 socket identification terminals 5 and 9 are connected Amplitude Terminal...

Страница 97: ...31 7 2 ELECTRONIC MODULE TEST Insert a DB9 female socket connected to a voltage generator according to the above connection chapter 7 1 Cause a short circuit between terminals 5 0V and 9 test to make the link which exists on the transformer board and which makes it possible to run the self test for good plugging in of the connectors on auxiliary voltage application Apply voltages according to the ...

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