Toshiba S2E21 Instruction Manual Download Page 73

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TOSHIBA

'7.7 Settings For Reduce Voltage Starting

For reduce voltage starting, the actual starting current is different from
the nameplate of the motor.

Perform the following steps for setting of TSC.

and Tst for locked-rotor

protection. In this case, Auto learning function of Tst and 1st should not
be turned on.

25-2: Setting of allowable locked-rotor time in cold condition

Given value (Consult motor manufacturer)

25-3: Starting current

See motor data (at full voltage.)

25-4: Starting time

Convert the actual starting time to setting value based 1st.

Tst =

1st

Where Tst starting time (setting value)

actual starting time at reduced voltage.

1st : starting current (motor data at full voltage)

: actual starting current at reduced voltage.

Actual starting time should be calculate based on motor torque

and load. or after one start read screen P4. (See manual page 50,

4-4.)

Actual starting current should be calculated, or after one start

P4. (See manual page

Following the above procedure protects the motor under a full voltage

locked-rotor condition and allows a longer starting time for reduced

inrush current) starting.

-120

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Summary of Contents for S2E21

Page 1: ...w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 2: ... Setting 56 5 9 Testing 81 5 10 Failure Information 83 5 11 Hand1 ing of Memory Card 86 5 12 Directional Ground Unit DG 91 MAINTENANCE AND INSPECTION 92 6 1 Periodic Inspection 92 6 2 Troubleshooting 96 6 3 Berlch Test I PROTECTIVE DETECTION SCHEME 105 7 1 Overload Unit 105 7 2 Locfked Rotor hit c 109 7 3 Reptitive Starting 113 7 4 Detection of Starting Current and Starting Time 114 7 5 Detection ...

Page 3: ...ing Sets the operation mode of the output relay 29 2 Energized on The output relay is energized on operation operation The state of output contact is shown below in Non fai I the case of tripping safe State a contact b contact E r Open Closed not provided Open Closed provided Trip C 1 osed Open w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 4: ... contact b contact t Open Closed not p r o v i d e d Closed Open provided Trip Open Closed 9 4 Setting Selects between continuously energized and energized on operation for 3 outputs trip alarm and lock Setting is made by moving the cursor to this position and entering 0 or 1 The setting of the error output is made in hardware ERROR 0 Non fail safe fail safe 71 w w w E l e c t r i c a l P a r t M ...

Page 5: ...or the output relay Selects a unit that drives the alarm output relay when an alarm is detected Enter either 0 not operate or 1 operate The output is an ORed output of alarm detections from the unit that drives the alarm output relay Locked rotor has no alarm But it isdetected as an overload OL alarm instead Zate at leiivery I w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 6: ...fies a unit that drives the trip output OL 1 relay when a trip is detected Others Enter either 0 not operate or 1 operate The output is an ORed output of trip detections from the unit that drives the trip output relay 13 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 7: ...V ll RTD5 5 es 12 RTD6 6 8R 13 RTD7 14 RTD8 15 10 Description Selects an analog transducer output Selects a measuring unit that outputs data to the analog transducer 4mA 20 mA 0 A or CT RATIO I No 20 2 0 C BSM No 21 6 oc 200 C transducer xltput RTDl RTD2 RTD3 RTD4 RTD5 RTD6 RTDt 10 State at delivery 0 4mA 20 mA 2o c 2OO C OA ZCT RATIO No 20 3 14 w w w E l e c t r i c a l P a r t M a n u a l s c o ...

Page 8: ...nd of RTD Kind of RTD RTDl to RTD8 Selects the corresponding RTD 0 type Different RTD types can be selected on one relay Example RTDl to RTDG can be PtlOOQ and RTD RTDB can be Nil2062 on one individual relay Set to 0 OFF those channels that are not used z g I 75 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 9: ...ate at delivery 33 l Setting Sets the alarm trip and reset levels for the RTD s 33 2 Alarm level Sets alarm detection temperature for each RTD 100 C Setting range 0 200 c 33 3 Trip level Sets trip detection temperature for each RTD 100 c Setting range 0 200 c 33 4 Reset level Sets a reset temperature for each RTD 100 c After the temperature goes below the reset level the S2E21 can then be reset Se...

Page 10: ...cifies whether or not the detected value is taken as the starting current setting Enter either 0 OFF or 1 ON When 0 OFF is entered the detected starting current is displayed P4 but the input value not the detected value is used as the setting value in the starting current setting P25 When 1 ON is entered the detected starting d rent is displayed P4 and also taken as the setting value in the starti...

Page 11: ...ted starting time is displayed P4 and also taken as the setting value in the starting time setting P25 34 4 Heating time Automatically detects the heating time constant 0 constant and specifies whether or not the detected value is taken as the heating time constant setting When 1 ON is entered the heating time constant is automatically detected and the detected value is taken as the setting value ...

Page 12: ...ue is taken as the cooling time constant setting When 1 ON is entered the cooling time constant is automatically detected and the detected value is taken as the setting value Upon completion of detection this setting automatically turns off Automatic detection requires input of RTDl to RTD3 and RTD8 for ambient temperature 19 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 13: ...ntering the numbers of items whose data you want cleared causes the corresponding data to be cleared Example 1 Data may be required to be reset cleared due to a new motor installation 2 Temperature data only 0 3 or OR may be required to be reset for an emergency restart Caution should be taken in resetting this data Motor damage may result _ itate at le Iivery 80 w w w E l e c t r i c a l P a r t ...

Page 14: ...A Description Perform tests on the input output circuit Displays the state of contact input from the terminal block Displays 0 when there is an input and Displays 0 when there is no input The 3 phase input and zero phase input are checked with the current value displayed on P2 Zate at le Iivery 81 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 15: ...Changes the outpit of the analog transduser Press EXE1 key The cursor appears and enter a current value 4 20 mA to be output from the analog transducer The output current is checked externally 82 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 16: ...ry 50 l Trip Displays information at the date and time of the information latest current associated trip Cause of trip is displayed 50 2 Time Dispiayes the date and time at which the trip occurred 50 3 information Displays 3 phase current zero phase current temperature rise and unbalance factor at the trip I 83 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 17: ...7 RTD8 E Description State at delivery Displays information at the date and time of the latest trip RTD number that has tripped is displayed Displayes the date and time at which the trip occurred Displays temperature of each RTD at trip 84 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 18: ... U R R E N T oo oo 0o oo I T A Description State at delivery Displays the current trend immediately before the trip Displays the date time at which the trip occurred Displays 10 seconds of 1 second interval current trend before trip Current of R phase and S phase are displayed on P52 and current of T phase and zero phase are displayed on P53 _ 85 w w w E l e c t r i c a l P a r t M a n u a l s c o...

Page 19: ...e S2E21 I 5 11 3 3 Initialize the memory card See 5 8 P27 Store the contents of setting into the memory card See 5 8 P27 Turn on the write protect for the memory card Gef 5 11 3 2j j The memory card uses S RAM card with a battery backup that prevents the contents of the backup from being lost when you pull the memory card from the S2E21 The battery backup also allows the memory card to be inserted...

Page 20: ...up procedure After this when the settings of the S2E21 are changed the contents of the memory card do not automatically change You are reguired to perform the store operation again Prior to the loading of the backed up settings comparison is made of the MACH ID and PASS ID between the memory card and the S2E21 When these ID numbers do not agree the backed up settings will not be loaded into the S2...

Page 21: ... than 10 years in relay W control power on relay Approx 2 years W no power to relay 5 11 3 Handling of Memory Card The memory card should be handled as follows 1 Inst alling battery 1 Open the battery holder cover of the memory card with the screwdriver supplied 2 Place the attached battery in the battery holder with the positive polarity t facing up 3 Close the battery holder cover in the process...

Page 22: ...rotect except when storing the data into the memory card To set the write protect Move the write protect switch to the right side to align with the mark 7 This djzjables writing into the memory card To cancel the write protect Move the write protect switch to the left side away from the mark V This enables writing into the memory card _ 89 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 23: ...ing Sets the operation mode of the output relay 29 2 Energized on The output relay is energized on operation operation The state of output contact is shown below in Non fai I the case of tripping safe State a contact b contact E r Open Closed not provided Open Closed provided Trip C 1 osed Open w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 24: ... contact b contact t Open Closed not p r o v i d e d Closed Open provided Trip Open Closed 9 4 Setting Selects between continuously energized and energized on operation for 3 outputs trip alarm and lock Setting is made by moving the cursor to this position and entering 0 or 1 The setting of the error output is made in hardware ERROR 0 Non fail safe fail safe 71 w w w E l e c t r i c a l P a r t M ...

Page 25: ...or the output relay Selects a unit that drives the alarm output relay when an alarm is detected Enter either 0 not operate or 1 operate The output is an ORed output of alarm detections from the unit that drives the alarm output relay Locked rotor has no alarm But it isdetected as an overload OL alarm instead Zate at leiivery I w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 26: ...fies a unit that drives the trip output OL 1 relay when a trip is detected Others Enter either 0 not operate or 1 operate The output is an ORed output of trip detections from the unit that drives the trip output relay 13 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 27: ...V ll RTD5 5 es 12 RTD6 6 8R 13 RTD7 14 RTD8 15 10 Description Selects an analog transducer output Selects a measuring unit that outputs data to the analog transducer 4mA 20 mA 0 A or CT RATIO I No 20 2 0 C BSM No 21 6 oc 200 C transducer xltput RTDl RTD2 RTD3 RTD4 RTD5 RTD6 RTDt 10 State at delivery 0 4mA 20 mA 2o c 2OO C OA ZCT RATIO No 20 3 14 w w w E l e c t r i c a l P a r t M a n u a l s c o ...

Page 28: ...nd of RTD Kind of RTD RTDl to RTD8 Selects the corresponding RTD 0 type Different RTD types can be selected on one relay Example RTDl to RTDG can be PtlOOQ and RTD RTDB can be Nil2062 on one individual relay Set to 0 OFF those channels that are not used z g I 75 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 29: ...ate at delivery 33 l Setting Sets the alarm trip and reset levels for the RTD s 33 2 Alarm level Sets alarm detection temperature for each RTD 100 C Setting range 0 200 c 33 3 Trip level Sets trip detection temperature for each RTD 100 c Setting range 0 200 c 33 4 Reset level Sets a reset temperature for each RTD 100 c After the temperature goes below the reset level the S2E21 can then be reset Se...

Page 30: ...cifies whether or not the detected value is taken as the starting current setting Enter either 0 OFF or 1 ON When 0 OFF is entered the detected starting current is displayed P4 but the input value not the detected value is used as the setting value in the starting current setting P25 When 1 ON is entered the detected starting d rent is displayed P4 and also taken as the setting value in the starti...

Page 31: ...ted starting time is displayed P4 and also taken as the setting value in the starting time setting P25 34 4 Heating time Automatically detects the heating time constant 0 constant and specifies whether or not the detected value is taken as the heating time constant setting When 1 ON is entered the heating time constant is automatically detected and the detected value is taken as the setting value ...

Page 32: ...ue is taken as the cooling time constant setting When 1 ON is entered the cooling time constant is automatically detected and the detected value is taken as the setting value Upon completion of detection this setting automatically turns off Automatic detection requires input of RTDl to RTD3 and RTD8 for ambient temperature 19 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 33: ...ntering the numbers of items whose data you want cleared causes the corresponding data to be cleared Example 1 Data may be required to be reset cleared due to a new motor installation 2 Temperature data only 0 3 or OR may be required to be reset for an emergency restart Caution should be taken in resetting this data Motor damage may result _ itate at le Iivery 80 w w w E l e c t r i c a l P a r t ...

Page 34: ...A Description Perform tests on the input output circuit Displays the state of contact input from the terminal block Displays 0 when there is an input and Displays 0 when there is no input The 3 phase input and zero phase input are checked with the current value displayed on P2 Zate at le Iivery 81 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 35: ...Changes the outpit of the analog transduser Press EXE1 key The cursor appears and enter a current value 4 20 mA to be output from the analog transducer The output current is checked externally 82 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 36: ...ry 50 l Trip Displays information at the date and time of the information latest current associated trip Cause of trip is displayed 50 2 Time Dispiayes the date and time at which the trip occurred 50 3 information Displays 3 phase current zero phase current temperature rise and unbalance factor at the trip I 83 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 37: ...7 RTD8 E Description State at delivery Displays information at the date and time of the latest trip RTD number that has tripped is displayed Displayes the date and time at which the trip occurred Displays temperature of each RTD at trip 84 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 38: ... U R R E N T oo oo 0o oo I T A Description State at delivery Displays the current trend immediately before the trip Displays the date time at which the trip occurred Displays 10 seconds of 1 second interval current trend before trip Current of R phase and S phase are displayed on P52 and current of T phase and zero phase are displayed on P53 _ 85 w w w E l e c t r i c a l P a r t M a n u a l s c o...

Page 39: ...e S2E21 I 5 11 3 3 Initialize the memory card See 5 8 P27 Store the contents of setting into the memory card See 5 8 P27 Turn on the write protect for the memory card Gef 5 11 3 2j j The memory card uses S RAM card with a battery backup that prevents the contents of the backup from being lost when you pull the memory card from the S2E21 The battery backup also allows the memory card to be inserted...

Page 40: ...up procedure After this when the settings of the S2E21 are changed the contents of the memory card do not automatically change You are reguired to perform the store operation again Prior to the loading of the backed up settings comparison is made of the MACH ID and PASS ID between the memory card and the S2E21 When these ID numbers do not agree the backed up settings will not be loaded into the S2...

Page 41: ... than 10 years in relay W control power on relay Approx 2 years W no power to relay 5 11 3 Handling of Memory Card The memory card should be handled as follows 1 Inst alling battery 1 Open the battery holder cover of the memory card with the screwdriver supplied 2 Place the attached battery in the battery holder with the positive polarity t facing up 3 Close the battery holder cover in the process...

Page 42: ...rotect except when storing the data into the memory card To set the write protect Move the write protect switch to the right side to align with the mark 7 This djzjables writing into the memory card To cancel the write protect Move the write protect switch to the left side away from the mark V This enables writing into the memory card _ 89 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 43: ...ce of the card facing toward the right Be sure to insert the memory card to the full stop When inserted fully the memory card end becomes aligned with the front and of the printed circuit board If the memory card still projects from the board card is not fully inserted push it further to the complete stop Withdrawing the memory card Reverse the ins ion process Printed circuit bard Before insertion...

Page 44: ... 3 6F9E0109 for capacitor voltage division type The terminal numbers 47 to 66 in the above manuals are read ai D47 to D66 for SZE21 in this manual The front external views of the three directional ground modules are shown in Figure 14 0 000 b hground system 0 000 cjmgmm systen kapacitor voltage division type Fifure 14 Front External View of Directional Ground Modules I 91 w w w E l e c t r i c a l...

Page 45: ...onsult this chapter when you make periodic inspection and troubleshooting 6 1 Periodic Inspection Inspection of the SZE21 should be done according to the following criteria 6 1 1 Inspection Interval a About 1 year when the environments is relatively good in normal electric rooms b About 6 months when the environment is very bad 92 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 46: ...e setting table Characteristic and operation check When required a check should be made of the protection characteristic Others Check for abnormal indication damages or other abnormalities 6 1 3 Replacing Parts The follolving parts should be replaced periodically 1 LCD Indicator Replacement interval about 5000 hours of lighting Parts to be replaced Part code Part name Remark 4D9E0054G003 Liquid cr...

Page 47: ... the set screws 6 Connect the LCD wire to the connector 2 Battery Replacement interval Approximately every 2 years LCDmoduk Parts to be replaced Part code Part name Rating CR 2025 equivalent Lithium coin battery 3 V Method of replacement 1 Turn off the control supply for the Battery S2E21 2 Open the d tay section 3 Remove the battery from the battery holder Battery holder Removing the battery 94 w...

Page 48: ...TOSHIBA 6F9EOlll 4 Install the new battery 5 Reset the calendar and clock Installing the batt 95 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 49: ... lit consult nearest TOSHIBA Operation of the key Normal pad has not been done for about 4 min Press the EXE key See Section 5 3 5 Open the door panel Bad connection Connect firmly See and check if Section 6 1 3 there is a loose connection between the LCD display and the door panel or between the door panel and the relay body Displ characters Brightness are faint reduced LCD display used for LCD l...

Page 50: ...en tarted more than ive times and earned function is elected Possible cause Setting value is incorrct Normal Normal The page is being turned Normal Change value from zerc Normal Change value from zero Cable conection is bad Normal hat to do Press the EXE key and enter all setting values again NOTE Display other pages See Section 5 3 1 The second setting is not provided Press the EXE1 key tc change...

Page 51: ... l o c k e d lutput is not selected at RY O P SEL P30 In O P RELAY CONFIG P29 the logic is inverted 3xternal connection is incorrect or Ioose Possible cause Normal Normal Normal Normal Normal Bad connection Normal Normal Normal Bad connection What to do PRE ALM setting of UC has a range between 100 and 300 ALM setting is not provided for I NST and UB Activate the protective function Select l to ac...

Page 52: ...till exceeded Hait for the motor to cool CAUTION Since the motor is overheated take utmost caution Transducer On P31 Normal Enter the necessary output does A T D O Pis setting not change not set P40 is displayed Normal Change to page other than P40 REP is On P25 TSC incorrect setting Enter the correct activated when 25 2 is set lower setting the motor is than T s t 25 5 99 w w w E l e c t r i c a ...

Page 53: ...is0 When time it is not 0 either wait or on P35 60 x TR x L 1 E lG clear 0s 1 6x1 2 Apply 6 times the TR Heating time constant rated current IN abruptly and measure the time it takes for the relay to trip Operat Gradually increase the Setting value 5 Figure 15 ing current and measure the point current value when the C relay trips L Operat 1 Apply the rated Setting value 10X Figure 15 ing current I...

Page 54: ...the current to 20 of the rated current and measure the time it akes for the relay tc trip Gradually reduce the current and measure the current value at which the relay trips Quickly apply current two times the setting value I and measure the time it takes for the relay to trip Setting value lo Setting value 10X Setting value 3 15 Figure 15 50 ms or less Test circuit single chase Figure 15 Figure 1...

Page 55: ... Quickly change current in one phase to 0 and measure the time it takes for the relay to trip Unbal 1 Apply the rated ante current IN f a c t o r I II IAVE I x loo IN Figure 16 2 Change current in The calculated value must be one phase and within 5 of the setting measure the current value at which the relay trips Example When the setting value is 30 the calculated value must be in the range of 25 ...

Page 56: ...le starting time applied current from 0 to 3 times the rated current I N and measure the time it takes for the relay to trip Operat 1 On P2 check that T s t Figure 15 ing B R is 0 When TX 10x point not zero either EP wait or clear 8 R Tst Starting time on P35 2 Apply the starting current 1st and measure the value of 6 R on P2 when the lock output is produced 103 w w w E l e c t r i c a l P a r t M...

Page 57: ...TOSHIBA 6F9EOlll Figure 15 Test Circuit 1 Figure 16 Test Circuit 2 Figure 17 Test Circuit 3 c 104 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 58: ...ted by the following formula During operation 0 1 t 6 l lt I e Y 1 where e i t Temperature rise in time t Bm 1t j Final temperature rise that occurs when the stator current It flows continuously and which is determined by the magnitude of It TR Motor s heating time constant At rest 0 Z t 0 d D e ro 2 where 82 t Temperature rise in time t 0 0 Temperature rise when the motor is at rest t 0 TD Motor ...

Page 59: ... by checking the presence of the stator current Then it performs the calculation of equation 1 or 2 to simulate the heated condition of the motor The stator current is samlped at predetermined intervals and the sampled currents are successively fed to the calculation process in order to perform the thermal simulation in response to the changes in the motor operating condition Figure 16 shows a tim...

Page 60: ...preture r i s e ON Ambient temperature 0 Time t Figure 16 Simulated Temperature Rise Timechart In Figure 16 the allowable temperature rise 0SM is a value dependent on the insulation design of the motor and is defined in Table 5 by JIS 4004 and NEMA MGl 1 65 Table 5 Insulation Class and Allowable Temperature Rise Insulation class Allowable temperature rise 8s YC E il i Class B Class F Class H i 105...

Page 61: ...supplied as the motor data When they are not shown request them from the motor manufacturer As a reference the standard values of Toshiba motors are shown in Table 6 Table 6 Heating Time Constant of Motor Toshiba Standard Values Motor kind Time constant minute Totally 1 Other than totally Heating 1 Cooling Frame enclosed enclosed outer fan 1 TR I I TD outer fan 2 poles 4 pole or more 355 30 400 35...

Page 62: ...t 2 5 times the rated current the heat of the motor is produced mainly by the stator and for higher load currents the rotor produces most of the heat For this reason the S2E21 performs the temperature rise simulation for the rotor as follows 1 When the load current is less than 2 5 times the rated current 0 I 0 2 5 x IN The temperature rise 0 R of the rotor is made to converge into the temperature...

Page 63: ...When at time 0 the rotor is locked then l t 1 BR t eR O st TSC elm t 5 Where 0 R t temperature rise of the rotor at time t C OR O temperature rise of the rotor before the rotor is locked C In load current at time t A 1st _ starting current A setting value TSC allowable locking time in the cold state set setting value 9 RM allowable temperature rise of the rotor CC fixed at 2OO C When OR t 9 the tr...

Page 64: ...ime is TX set TX allowable locking time in cold state set setting value ii In hot condition motor is running at the rated load In equation 5 since 9 R O BSN the operating time will be T H CORM BSN e TSC set RM Where 6 SN rated temperature rise value set setting value TSH allowable locking time in hot condition set _ L J TSH T i g i 111 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 65: ...ii In operati ng condition In reality 0 R O falls between 0 and BSN The operating time in this case is given by TOP s lll OR 6 RM TSC kec Where TOP operating time 112 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 66: ...tor heating caused by a single starting is expressed by the following equation E 2 BRM However if at starting l t 1st then the following holds Tst B FE RM I 6b Where Tst motor starting time set setting value TSC allowable rotor locking time set setting value 9 nM allowable rotor temperature rise rc fixed at 200 C 1st starting current A setting value Hence when there is no margin defined in 6b betw...

Page 67: ... rated current but lower than a current that will trigger the overload OL function 4 Overloaded Not during the starting period when the motor current exceeds the operating value for the overload OL function I________I _____ercurrent __________________ _________________ m g e ting point _______________________ _ L _O D5 x IN 1 2 I 3 I 4 J 3 J 1 T 4 4 I A 1 Starting current The starting current is a...

Page 68: ...reat effect on the detection accuracy of the heating time constant and the cooling time constant a Do not allow the RTD to be affected by heat from the motor b Keep the RTD free from direct sun rays or radiant heat c Keep the RTD free from influences of cool air and drafts d Keep the RTD free from moisture or high humidity 2 To maintain a required level of accuracy the heating time constant and th...

Page 69: ...I the heating time constant is expressed as TR t2 tl e It eiw 1 e It e k2 From equation 2 the cooling time constant is given by t2 t TD ezct j 2 Ln 02M At each start and stop of the motor the heating time constant and the cooling time constant are detected over a length of time equivalent to these time constants Five measurements are taken and averaged to determine the heating time constant and th...

Page 70: ...protection it is necessary to set the motor constants Fundanenta 1 information IMFLC motor rated current A CT CT cecondary current A 0SM allowable motor temperature rise TSC allowable motor locking time during cold condition Tst starting time set 1st starting current A 20 Z CT ratio given 20 3 ZCT ratio 50 A This does not affect the protection characteristics 20 4 rated cZ it setting IN This is ca...

Page 71: ...nt Motor inrush current Suitchgear overcurrent relay characteristics 22 3 Setting of INST time CT This is fixed at 0 05 s 22 4 Setting of OC current 10 OC is not for the motor protection but for the protection of equipment connected to the motor OC is locked when the equipment protection is not needed When OC is equired set to 1 5 times 22 5 Setting of OC time Tot Set Oc time to 0 3 s 23 2 Setting...

Page 72: ...le locking time in cold condition TSC Given value Consult motor manufacturer 25 3 Starting current 1st See motor data Or after one start read screen P4 See page 50 4 2 25 4 Starting time Tst Varies per application motor load type of starter calculate based on motor torque and load Or after one start read screen P4 See page 50 4 4 g 2 119 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...

Page 73: ... actual starting time to setting value based 1st Ist act Tst Tst act 1st Where Tst starting time setting value Tst act actual starting time at reduced voltage 1st starting current motor data at full voltage I act actual starting current at reduced voltage Actual starting time should be calculate based on motor torque and load or after one start read screen P4 See manual page 50 4 4 Actual starting...

Page 74: ...o computer C l i nf bl r rl t Y I r se ect on Of Alar blue _ L _ 1 S S OX N l M sec I to 31 O No l Yes l l 0 I 1 I I I I _ lll sdect o of Alar Value 11 100 I 1 1 1 1100 300 1 I 1 I Selection of Fall safe or Non Fall safe O erarmn Sdectlon of Fall safe 07 Non Fail safe 0 Selection of Fall safe or Non Fall safe Opt O Nm Oper 1 n h A l fi tput Signal selection 4 20 A 1 A 1 Type PtlOO PtlW JIS N lW N1...

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