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MICROELETTRICA MC40 Operation Manual

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MC40
MO-0375-ING
Doc. N°
MICROPROCESSOR
OVERCURRENT and EARTH FAULT
RELAY
TYPE
OPERATION MANUAL
Copyright 2009
Date
06.09.2022
Rev.
1
Pag.
1
of
34

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Summary of Contents for MICROELETTRICA MC40

  • Page 1 MC40 MO-0375-ING Doc. N° MICROPROCESSOR OVERCURRENT and EARTH FAULT RELAY TYPE OPERATION MANUAL Copyright 2009 Date 06.09.2022 Rev. Pag.

  • Page 2: Table Of Contents

    MC40 MO-0375-ING Doc. N° 1. General Utilization and Commissioning Directions ________________________________________________________ 3 1.1 - Storage and Transportation ______________________________________________________________________ 3 1.2 - Installation __________________________________________________________________________________ 3 1.3 - Electrical Connection ___________________________________________________________________________ 3 1.4 - Measuring Inputs and Power Supply _______________________________________________________________ 3 1.5 - Outputs Loading ______________________________________________________________________________ 3 1.6 - Protection Earthing ____________________________________________________________________________ 3...

  • Page 3: General Utilization And Commissioning Directions

    MC40 MO-0375-ING Doc. N° 1. General Utilization and Commissioning Directions Always make reference to the specific description of the product and to the Manufacturer's instruction. Carefully observe the following warnings. 1.1 - Storage and Transportation must comply with the environmental conditions stated on the product's instruction or by the applicable IEC standards.

  • Page 4: Maintenance

    MC40 MO-0375-ING Doc. N° 1.10 - Maintenance Make reference to the instruction manual of the Manufacturer; maintenance must be carried-out by specially trained people and in strict conformity with the safety regulations. 1.11 - Waste Disposal of Electrical & Electronic Equipment (Applicable throughout the European Union and other European countries with separate collection program).

  • Page 5: General Characteristics

    MC40 MO-0375-ING Doc. N° 2. General Characteristics The MC is a very innovative and versatile line of Protective Relays which takes advantage of the long and successful experience coming from the M-Line. The main features of the MC-Line relays are: Compact draw-out execution for Flush Mounting or for assembly in 19”...

  • Page 6: Operation And Algorithms

    MC40 MO-0375-ING Doc. N° 2.2 - Operation and Algorithms 2.2.1 - Reference Input Values Display Description Setting Range Step Unit Rated Primary current of phase C.T. 9999 Rated Secondary current of phase C.T. Rated Primary neutral 9999 Rated Secondary neutral...
  • Page 7 MC40 MO-0375-ING Doc. N° 2.2.2.4 - Algorithm of the time current curves The Time Current Curves are generally calculated with the following equation :       • • t(I)   α    ...

  • Page 8: Time Current Curves Iec (Tu1029 Rev.0)

    MC40 MO-0375-ING Doc. N° 2.2.3 - Time Current Curves IEC (TU1029 Rev.0) Copyright 2009 Date 06.09.2022 Rev. Pag.

  • Page 9: Time Current Curves Ieee (Tu1028 Rev.0)

    MC40 MO-0375-ING Doc. N° 2.2.4 - Time Current Curves IEEE (TU1028 Rev.0) Copyright 2009 Date 06.09.2022 Rev. Pag.

  • Page 10: Functions And Settings (Function)

    MC40 MO-0375-ING Doc. N° 3. Functions and Settings (Function) 3.1 - T> (F49) - Thermal Image protection level FuncEnab → Enable [Disable / Enable] Options → No Param No Parameters TripLev → (50  110) step → (10  100)

  • Page 11: Thermal Image Curves (Tu0445 Rev.0)

    MC40 MO-0375-ING Doc. N° 3.1.1 - Thermal Image Curves (TU0445 Rev.0) Copyright 2009 Date 06.09.2022 Rev. Pag.

  • Page 12: I> (1F51) - First Overcurrent Protection Level

    MC40 MO-0375-ING Doc. N° 3.2 - I> (1F51) - First overcurrent protection level FuncEnab → Enable [Disable / Enable] Options → [D / A / B / C / MI / VI / I / EI / SI] Disable [Disable / Enable] →...

  • Page 13: Ih (3F51) - Third Overcurrent Protection Level

    MC40 MO-0375-ING Doc. N° 3.4 - IH (3F51) - Third overcurrent protection level FuncEnab Enable [Disable / Enable] → Options → Disable [Disable / Enable] Enable [Disable / Enable] → → Enable [Disable / Enable] TripLev step 0.01 → (0.5  40) Timers →...

  • Page 14: Io> (1F51N) - First Earth Fault Protection Level

    MC40 MO-0375-ING Doc. N° 3.5 - Io> (1F51N) - First Earth Fault protection level FuncEnab → Enable [Disable / Enable] Options → [D / A / B / C / I / VI / EI / MI / SI] →...

  • Page 15: Ioh (3F51N) - Third Earth Fault Protection Level

    MC40 MO-0375-ING Doc. N° 3.7 - IoH (3F51N) - Third Earth Fault protection level FuncEnab → Enable [Disable / Enable] Options → Disable [Disable / Enable] → Enable [Disable / Enable] TripLev → 2.00 (0.01  9.99) step 0.01 Timers →...

  • Page 16: I.r.f. - Internal Relay Failure

    MC40 MO-0375-ING Doc. N° 3.9 - I.R.F. - Internal Relay Failure FuncEnab → No Param No Parameters Options → NoTrip [NoTrip / Trip] TripLev → No Param No Parameters Timers → No Param No Parameters Description of variables The variable “Opl” can be programmed to trip the output relays same as the other protection functions (Opl = TRIP), or to only operate the “IRF”...

  • Page 17: Osc - Oscillographic Recording

    MC40 MO-0375-ING Doc. N° 3.11 - Osc - Oscillographic Recording FuncEnab → Enable [Disable / Enable] Options Trip [Disable / Start / Trip / Ext.Inp.] → TripLev → No Param No Parameters Timers → tPre (0.1  0.5) step tPost step →...

  • Page 18: Lcd - Display And Buzzer Operation

    MC40 MO-0375-ING Doc. N° 3.13 - LCD – Display and Buzzer operation FuncEnab → No Param No Parameters Options → BeepON [BeepOFF / BeepON] → Auto [Auto / On] TripLev → No Param No Parameters Timers → No Param No Parameters Description of variables Buzzer “Beep”...

  • Page 19: Digital Inputs

    MC40 MO-0375-ING Doc. N° 6. Digital Inputs Three optoisolated, self-powered Digital Inputs D1, D2, D3 are provided. A Digital Input is activated when its terminals are shorted by a cold contact. (Terminals 22 - 19) : It is usable as Function Blocking Input...

  • Page 20: Relay Management

    MC40 MO-0375-ING Doc. N° 8. Relay Management The relay can be totally managed locally, either by the RS232 communication port or by the 4 key buttons and the LCD display, or remotely via the communication bus RS485 connected to the rear terminal blocks.

  • Page 21: Signalizations

    MC40 MO-0375-ING Doc. N° 9. Signalizations Four signal leds are available on the Front Face Panel: Illuminated when C/B open status is detected. OPEN (Digital Input D3 Open) Illuminated when C/B close status is detected. (Digital Input D3 closed) CLOSED Flashing when Breaker Failure is detected.

  • Page 22: Serial Communication Port

    Note: any change of this setting becomes valid at the next power on. Each relay is identified by its programmable address code (NodeAd) and can be called from the P.C. A dedicated communication software (MSCom) for windows is available on www.microelettrica.com. Maximum length of the serial bus can be up to 200m.

  • Page 23: Communication Port On Front Face Panel

    MC40 MO-0375-ING Doc. N° 11.2 - Communication Port on Front Face Panel This port is used for communication through the Front Face Panel between a local Lap-top PC. The physical link is RS232 by the standard female 9-pin D-sub connector available on the Front Face Panel. Via this Port complete Relay management and data acquisition is possible.

  • Page 24: Menu And Variables

    MC40 MO-0375-ING Doc. N° 12. Menu and Variables 12.2 - Real Time Measurements Scrolling display of the Real Time Measurements is the Default operation. Scrolling can be stopped at any of the measurements and restarted by pressing the Reset button...

  • Page 25: Lasttrip (Event Recording)

    MC40 MO-0375-ING Doc. N° 12.4 - LastTrip (Event Recording) The MC records any tripping and stores the information relevant to the last 20 tripping of protection functions (FIFO). Each event recording includes the following information. “Real Time Meas” “LastTrip” event, to scroll available events, to “Rec #”...

  • Page 26: R/W Set (Programming / Reading The Relay Settings)

    MC40 MO-0375-ING Doc. N° 12.5 - R/W Set (Programming / Reading the Relay Settings) “Main Menu” select “Function” select among following sub menus: 12.5.1 - CommAdd (Communication Address) “CommAdd” “Add: #” “Password ????” (If not yet entered; see § Password) to select the Address (1-250) to validate.

  • Page 27: Function (Functions)

    MC40 MO-0375-ING Doc. N° 12.5.4 - Function (Functions) “Function”, function, to scroll available Functions, to Read/Write setting of the selected function, to select the different definable fields - FuncEnab - TripLev - Options - Timers to access the selected field and read the actual setting of the relevant variable to modify the actual setting;...
  • Page 28 MC40 MO-0375-ING Doc. N° Display Description Setting Range Step Default Function Type Variable Unit Value → FuncEnab Enable Enable of the protection function Enable/Disable (3F51N) Options → Disable Operation controlled by Blocking Digital Input Enable/Disable Enable Function operation triggers the oscillographic wave...

  • Page 29: Relaycfg (Relay Configuration)

    MC40 MO-0375-ING Doc. N° 12.6 - RelayCfg (Relay Configuration) To associate one of the Output Relays to one or more functions: enter the menu “R/W Set”, select “Relay Cfg”, select the “Relay #” to be programmed, select “Link”; at this stage the list of the available functions is displayed.

  • Page 30: Keyboard Operational Diagram

    MC40 MO-0375-ING Doc. N° 12. Keyboard Operational Diagram Copyright 2009 Date 06.09.2022 Rev. Pag.

  • Page 31: Password

    OK button when the password is requested. 15. Maintenance No maintenance is required. 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.

  • Page 32: Connection Diagram

    MC40 MO-0375-ING Doc. N° 17. Connection Diagram 18. Overall Dimensions PROTECTION DEGREE IP44 (IP54 on request) Copyright 2009 Date 06.09.2022 Rev. Pag.

  • Page 33: Direction For Pcb's Draw-Out And Plug-In

    MC40 MO-0375-ING Doc. N° 19. Direction for Pcb's Draw-Out and Plug-In 19.1 - Draw-Out Rotate clockwise the screws  in the horizontal position of the screws-driver mark. Draw-out the PCB by pulling on the handle  19.2 - Plug-In Rotate clockwise the screws  in the horizontal position of the screws-driver mark.

  • Page 34: Electrical Characteristics

    This publication may be subject to alteration without prior notice. Therefore, a printed copy of this document may not be the latest revision. Please contact your local representative for the latest update. The trademarks MS Microelettrica Scientifica, Knorr and Knorr-Bremse as well as the figurative mark “K” are registered. Copyright ©...

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