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MICROENER IM30-DK, Operation Manual

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MICROENER IM30-DK Operation Manual Download Page 10

 

 

IM30-DK

 

Doc. N° MO-0040-ING 

Rev. 

2

 

Pag. 

10    

of    

34

 

 

Copyright 2010 - Microener

 

  

2.4 

– Interlocking logic 

 
Different relays can be each-other interlocked thus allowing to implement accelerated selectivity 
scheems with all time delay set at the same level. 
 

2.4.1 

– Instantaneous outputs and lock-out logic 

 

Generally one instantaneous and one time delayed elements are provided for each Protection 
Function.  Programming of the configuration of the output relays allows to have any of them 
controlled either by the time delayed element or by the instantaneous element of one or more 
Protection Functions. The output relays controlled by instantaneous elements pick-up as soon as the 
current exceeds the set trip level and drop-off as soon as the current drops below the reset level. 
If the relay was energized by the instantaneous element and after tripping of the time delayed 
element of the same function (even if this is programmed to control a different output relay) the 
current does not drop below the set level (Circuit Breaker did not open) the output relay is any-how 
deenergized after an additional time delay “tBF”. If this relay was used to block the operation of 
another Protection Relay, this will be released and will then trip a back-up C/B. 

 

2.4.2 

– Function Blocking Inputs 

 
When the terminals 1-2 of the digital input B2 are shorted, it is possible to block the operation of the 
time delayed element of the function according to the programming of the corresponding parameter: 
 
 

B2 

 

1I 

=  ON/OFF  (If set to ON, the activation of the input B2 blocks the time 

delayed  
                 element of the function) 

 

B2 

 

2I 

=  ON/OFF 

 

B2 

 

3I 

=  ON/OFF 

 

B2 

 

1O 

=  ON/OFF 

 

B2 

 

2O 

=  ON/OFF 

 

B2 

 

3O 

=  ON/OFF 

 
 

2.5 

– Breaker Failure Protection 

 
The Breaker Failure function is related to the functions programmed to operate the output relay R1. 
If, after R1 has been e

nergized, the input current does not drop to zero within the set time “tBF”, 

another output relay is energized for giving an alarm of tripping a back-up C/B. 
 

 

 
 

Summary of Contents for IM30-DK

Page 1: ...ESSOR OVERCURRENT AND DIRECTIONAL EARTH FAULT PROTECTION RELAY TYPE IM30 DK OPERATION MANUAL MULTIFUNCTION OVERCURRENT DIRECTIONAL EARTH FAULT RELAY TYPE IM30 DK ENTER RESET MODE SELECT PROG I Io PROG I R F MICROELETTRICA SCIENTIFICA MILANO ITALY I Io BR FAIL I2 t Uo BLOCK INPUT ...

Page 2: ...__ 13 3 Controls and measurements____________________________________________________________ 14 4 Signalization_________________________________________________________________________ 15 5 Output relays_________________________________________________________________________16 6 Serial communication__________________________________________________________________16 7 Digital inputs_____________...

Page 3: ...be compatible with their declared performance 1 6 PROTECTION EARTHING When earthing is required carefully check its efficiency 1 7 SETTING AND CALIBRATION Carefully check the proper setting of the different functions according to the configuration of the protected system the safety regulations and the co ordination with other equipment 1 8 SAFETY PROTECTION Carefully check that all safety means ar...

Page 4: ... the safety regulations 1 11 FAULT DETECTION AND REPAIR Internal calibrations and components should not be alterated or replaced For repair please ask the Manufacturer or its authorised Dealers Misapplication of the above warnings and instruction relieves the Manufacturer of any liability 2 GENERAL CHARACTERISTICS Input quantities are supplied to 1 Potential Transformer and to 4 Current Transforme...

Page 5: ...e value of the Rated Primary Current On 1 9999 A adjustable in steps of 1A If the input of the Earth Fault element is supplied by the Residual connection of the 3 phase CTs we shall set for On the same value as In If the input of the Earth Fault element is supplied by a separated Core Balance CT or by another CT On value will be the Rated Primary Current of this CT normally different from In The R...

Page 6: ...ly calculated with the following equation where t I Actual trip time delay when the input current equals I Is Set minimum pick up level K Ts Set time delay t I Ts when tr Operation time of the output relay on pick up The constant A B and a have different values for the different Time Current Curves Curve Name Curve Identifier A B a IEC A Inverse A 0 14 0 0 02 IEC B Very Inverse B 13 5 0 1 IEC C Ex...

Page 7: ...ent rises from 0 to 1 5 times the relay rated input current In in less than 60ms dI dt 25 In s the set pick up level 2I and or 3I is automatically doubled example 2I 10In becomes 20In As soon as the current drops below 1 25xIn the duplicated pick up level comes back to its original setting The doubling function is activated by programming the variables 2Ix2 an 3Ix2 2Ix2 ON Doubling of the pick up ...

Page 8: ...t voltage o Displacement of 3Io from 3Uo Io Component of 3Io in the direction Io 3Io cos o The earth fault element can operate in three different ways according to the programming of the variable F F Dis The element just operates as a normal overcurrent element without either residual voltage control 3 Uo and directional control The element operates if 3Io xO F Sup The element just operates with s...

Page 9: ...s are present The input residual voltage 3Uo exceeds the set level xUO 3Uo xUO The component of the input residual current 3Io in the direction exceeds the set level xO 3Io cos o xO The characteristic angle must be selected according to the kind of earthing of the installation Typical setting are UNEARTHED NEUTRAL 90 NEUTRAL EARTHED VIA RESISTOR 0 SOLIDLY EARTHED NEUTRAL 60 ...

Page 10: ... the same function even if this is programmed to control a different output relay the current does not drop below the set level Circuit Breaker did not open the output relay is any how deenergized after an additional time delay tBF If this relay was used to block the operation of another Protection Relay this will be released and will then trip a back up C B 2 4 2 Function Blocking Inputs When the...

Page 11: ... interruption energy unit Wc Any time the Circuit Breaker opens terminals 1 3 of the digital input B3 closed by C B Normally Close contact 52b the relay accumulates the energy corresponding to a number of conventional interruption units 2 2 2 2 i x i x I I t I t I nWc When the amount of the accumulated energy exceeds the set value Wi the relay energized a user programmable output relay This relay ...

Page 12: ...2000 2 2 When the summation of the accumulations exceeds the set limit Wi 500Wc the maintenance alarm is issued In the menu TRIPNUM exists a measurement Wi that at any interruption is decremented by the amount of energy relevant to the interruption computed as of the value set for Wi In the above example the accumulation relevant to the interruption of 2000A was 10Wc corresponding to Wi 2 100 500 ...

Page 13: ...s displayed with one of the groups of digits YY MMM or DD blinking The DOWN key operates as a cursor It moves through the groups of digits in the sequence YY MMM DD YY The UP key allows the user to modify the currently blinking group of digits If the ENTER button is pressed the currently displayed date is captured On the other hand pressing the SELECT button leaves the current date unchanged and s...

Page 14: ...ning by the key SELECT Parameter modification by the key Set validation by the key ENTER Scanning of the menus by the key MODE SELECT ENTER Enabled only if input current is zero ENTER RESET MODE SELECT PROG The SELECT button chooses which category of values within the chosen mode to display Pressing this button progressively selects between Measurements Display Setting Display Programming and Test...

Page 15: ...eaker Failure Element is tripped Flashing when alarm I 2 t is issued g Red LED Uo Flashing when the voltage Uo exceeds the set level Uo Illuminated after expiry of the set trip time delay tUo h Yellow LED BLOCK INPUT Flashing when a blocking signal is present at the relevant input terminals The reset of the leds takes place as follows Leds a b c d g h From flashing to off automatically when the li...

Page 16: ...rked that the programming structure does not allow to associate the same relay at the same time to instantaneous and delayed elements Therefore any relay already associated to any time delayed element cannot be associated to any instantaneous element and viceversa b The relay R5 normally energised is not programmable and it is deenergized on internal fault power supply failure during the programmi...

Page 17: ...t any C B opening B14 terminals 1 14 Switching over from Setting Program 1 SP1 to Setting Program 2 SP2 Terminals 1 14 open SP1 active Terminals 1 14 shorted SP2 active The input B4 can also be activated via the serial communication port in this case the switching back from SP2 to SP1 can only be made via serial port Viceversa if the terminals 1 14 are shorted the switching back from SP2 to SP1 ca...

Page 18: ... memory SET DISP Reading of the settings and of the configuration of the output relays as programmed PROG Access to the programming of the settings and of relay configuration TEST PROG Access to the manual test routines b Green key SELECT When operated it selects one of the menus available in the actual operation MODE c Red key AND When operated they allow to scroll the different information avail...

Page 19: ...True R M S value of the zero sequence voltage displayed as secondary voltage of main V Ts 1 210 V oxxxxx Io Uo phase displacement angle in degrees 10 2 MAX VAL Highest values recorded starting from 100ms after closing of main Circuit Breaker plus inrush values recorded within the first 100ms from Breaker closing refreshed any time the breaker closes Display Description IAxx xIn Peak value of phase...

Page 20: ...ge oxxxxx Io Uo phase displacement 10 4 TRIP NUM Counters of the number of operations for each of the relay functions The memory is non volatile and can be cancelled only with a secret procedure Display Description 1I xxxxx Trip number of first overcurrent element 50 51 2I xxxxx As above second element 50 51 3I xxxxx As above third element 50 51 1N xxxxx As above first element 67N 2N xxxxx As abov...

Page 21: ...roduction standard settings here under shown Display Description Setting Range Step Unit xxxxxxx Current date DDMMMYY xx xx xx Current time HH MM SS Fn 50 Hz Mains frequency setting range 50 60 10 Hz In 500Ap Rated primary current of the phase C Ts 1 9999 1 A On 500Ap Rated primary current of the C Ts or of the tore C T supplying the zero sequence current 1 9999 1 A F 1I D Operation characteristic...

Page 22: ...peration mode of element 2O Dir Sup Dis 2 o 90 Characteristic angle of directional element 2O 0 359 1 2O 0 5 On Trip level of second element 67N p u of the rated current of the C Ts for zero sequence detection 0 4 9 Dis 0 1 On t2O 0 05s Trip time delay of second element 67N 0 02 60 0 01 0 1 s B2 2O OFF B2 blocks function 1O ON OFF 2O Trg OFF Trip of t2O triggers oscillographic recording ON OFF 3Uo...

Page 23: ...lement 50 51 operates relay R1 R2 R3 R4 1O 4 Instantaneous element of first element 67N operates relay R1 R2 R3 R4 t1O 2 As above time delayed element 67N operates relay R1 R2 R3 R4 2O 4 Instantaneous element of second element 67N operates relay R1 R2 R3 R4 t2O 2 As above time delayed element 67N operates relay R1 R2 R3 R4 3O Instantaneous element of third element 67N operates relay R1 R2 R3 R4 t3...

Page 24: ...onment or after all dangerous output connections are removed 14 MAINTENANCE No maintenance is required Periodically a functional check out can be made with the test procedures described under MANUAL TEST chapter In case of malfunctioning please contact Microelettrica Scientifica Service or the local Authorised Dealer mentioning the relay s Serial No reported in the label on relays enclosure WARNIN...

Page 25: ...cal fast transient burst IEC61000 4 4 level 3 2kV 5kHz HF disturbance test with damped oscillatory wave 1MHz burst test IEC60255 22 1 class 3 400pps 2 5kV m c 1kV d m Oscillatory waves Ring waves IEC61000 4 12 level 4 4kV c m 2kV d m Surge immunity test IEC61000 4 5 level 4 2kV c m 1kV d m Voltage interruptions IEC60255 4 11 Resistance to vibration and shocks IEC60255 21 1 IEC60255 21 2 10 500Hz 1...

Page 26: ...IM30 DK Doc N MO 0040 ING Rev 2 Pag 26 of 34 Copyright 2010 Microener 17 CONNECTION DIAGRAM SCE1476 Rev 3 Standard Output ...

Page 27: ...IM30 DK Doc N MO 0040 ING Rev 2 Pag 27 of 34 Copyright 2010 Microener 18 WIRING THE SERIAL COMMUNICATION BUS SCE1309 Rev 0 19 CHANGE PHASE CURRENT RATED INPUT 1 OR 5A ...

Page 28: ...IM30 DK Doc N MO 0040 ING Rev 2 Pag 28 of 34 Copyright 2010 Microener 20 TIME CURRENT CURVES TU0388 Rev 0 ...

Page 29: ...IM30 DK Doc N MO 0040 ING Rev 2 Pag 29 of 34 Copyright 2010 Microener 21 TIME CURRENT CURVES TU0388 Rev 0 ...

Page 30: ... of the screws driver mark Draw out the PCB by pulling on the handle 22 2 Plug in Rotate clockwise the screws and in the horizontal position of the screws driver mark Slide in the card on the rails provided inside the enclosure Plug in the card completely and by pressing the handle to the closed position Rotate anticlockwise the screws and with the mark in the vertical position locked ...

Page 31: ...IM30 DK Doc N MO 0040 ING Rev 2 Pag 31 of 34 Copyright 2010 Microener 23 MOUNTING ...

Page 32: ...IM30 DK Doc N MO 0040 ING Rev 2 Pag 32 of 34 Copyright 2010 Microener 24 KEYBOARD OPERATIONAL DIAGRAM ...

Page 33: ...ON OFF ON t3I Trip time delay of the third element 50 51 0 02 60 s 0 05 B2 3I B2 blocks function 3I ON OFF OFF 3I Trg Trip of t3I triggers oscillographic recording ON OFF OFF OPTIONAL F 1O Operation characteristic of the first element 67N D A B C MI SI VI I EI D 1Uo Minimum level of residual voltage for directional operation of the element 1O 2 50 V 10 F1 Operation mode of 1O Dir Sup Dis Dir 1 o C...

Page 34: ...fault Setting Actual Setting Protect Element Output Relays Description Protect Element Output Relays 1I 3 Instantaneous element of first element 50 51 1I t1I 1 As above time delayed element 50 51 t1I 2I 3 Instantaneous element of second element 50 51 2I t2I 1 As above time delayed element 50 51 t2I 3I Instantaneous element of third element 50 51 3I t3I As above time delayed element 50 51 t3I 1O 4 ...

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