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MICROPROCESSOR
MOTOR PROTECTION RELAY
WITH DIRECTIONAL EARTH FAULT ELEMENT
OPERATION MANUAL
MICROELETTRICA
MOTOR PROTECTION
MM30-DK
TYPE
MM30-DK
T
>
St.No
PROG/
I.R.F.
SCIENTIFICA
MILANO
ITALY
MODE
MULTIFUNCTION
RELAY TYPE
MM30-DK
ENTER/RESET
Copyright - 2010 - Microener
I<
Is>,1
O>
I>
ROTOR
STALL
+
SELECT
-
PROG.
Doc. N° MO-0050-ING
Rev.
2
Pag.
1 of 36
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Summary of Contents for MICROENER MM30-DK
- Page 1 MOTOR PROTECTION RELAY WITH DIRECTIONAL EARTH FAULT ELEMENT TYPE MM30-DK OPERATION MANUAL > St.No I< Is>,1 O> PROG/ I> ROTOR STALL I.R.F. MICROELETTRICA SCIENTIFICA MILANO ITALY MODE SELECT MULTIFUNCTION MOTOR PROTECTION RELAY TYPE MM30-DK PROG. ENTER/RESET Copyright - 2010 - Microener...
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Page 2: Table Of Contents
20 Inverse time unbalance protection element___________________________________________________________ 30 21 Direction for pcb’s draw-out and plug-in_____________________________________________________________ 31 21.1 Draw-out______________________________________________________________________________ 31 21.2 Plug-in________________________________________________________________________________ 31 22 Overall dimensions / Mounting_____________________________________________________________________ 32 23 Keyboard operational diagram______________________________________________________________________ 33 24 Setting’s form____________________________________________________________________________________ 34 Copyright - 2010 - Microener... -
Page 3: General Utilization And Commissioning Directions
The electronic circuits reduced by M.S. are completely safe from electrostatic discharge (8 KV IEC 255.22.2) when housed in their case; withdrawing the modules without proper cautions expose them to the risk of damage. Copyright - 2010 - Microener... -
Page 4: Maintenance
24V(-20%) / 110V(+15%) a.c. 80V(-20%) / 220V(+15%) a.c. a) - b) - 24V(-20%) / 125V(+20%) d.c. 90V(-20%) / 250V(+20%) d.c. Before energising the unit check that supply voltage is within the allowed limits. Copyright - 2010 - Microener... -
Page 5: Operation An Algorithms
3 system C.Ts. or from the core balance C.T. 0) the Earth Fault Protection Element trips independently If any Earth Fault is experienced (I from the phase current measuring elements. Copyright - 2010 - Microener... -
Page 6: Earth Fault Current And Voltage Inputs
The display directly gives the measurement “ Uo “ of the Secondary Zero sequence voltage and the measurement “ o ” of the phase displacement of the Zero Sequence Current Fasor from the Zero Sequence Voltage Fasor. Copyright - 2010 - Microener... -
Page 7: Function And Setting
Automatic 1% drop out percentage. Restart inhibition: Ts/n = (40-100)%Tn, step 1%Tn To inhibit a new motor starting before cooling down to 99% Ts/n, reset after tripping of the thermal element takes places when T< 0.99[Ts]. Copyright - 2010 - Microener... -
Page 8: F51Lr - Locked Rotor Protection (Rotor Jam)
Under current level I< = (0.15-1)Im, step 0,01Im. lf I< = DIS. the function is disactivated. When current is below 0.1lm in all phases the function is activated. Trip time delay = 3 sec. Copyright - 2010 - Microener... -
Page 9: F51 - Overcurrent Protection
“ Uo “ level is disregarded. As for function F51, any of the output relays can be associated to the instantaneous element of “O>” as well as to the time delayed element “ tO> “. Copyright - 2010 - Microener... -
Page 10: Limitation Of The Stats Number
At motor start counting of “ tTr “ begins. If during “ tTr ” the motor current drops below “ ltr “, switching-over is operated; if motor current stays above “ ltr “ longer than “ tTr “, the Locked Rotor element is activated. Copyright - 2010 - Microener... -
Page 11: Autosetting
The complexity of properly set a motor protection, frequently produces undesired tripping or non-operation of some of the functions. The relay MM30-DK can automatically select the best setting of the parameters according to motor and system basic data. These data are:... -
Page 12: Operational Of The Directional Earth Fault Element
The characteristic angle of the relay must be selected according to the kind of earthing of the installation which has to be protected against earth fault; typical setting are: o = 90° UNEARTHED NEUTRAL o = 0° NEUTRAL EARTHED VIA RESISTOR o = 60° SOLIDLY EARTHED NEUTRAL Copyright - 2010 - Microener... -
Page 13: Clock And Calendar
During power on, time tolerance depends on the on board crystal (+/-50ppm typ, +/-100ppm max. over full temperature range). During power off, time tolerance depends on the RTC’s oscillator (+65 –270 ppm max over full temperature range). Copyright - 2010 - Microener... -
Page 14: Controls And Measurements
If not tripped, this button altered. restores the default display. Copyright - 2010 - Microener... -
Page 15: Signalization
From flashing to off, automatically when the lit-on cause disappears. From ON to OFF, by "ENTER/RESET" push button only if the tripping cause has disappeared. Leds From flashing or illuminated to off, automatically when the lit-on cause disappears. Copyright - 2010 - Microener... -
Page 16: Output Relays
5. OUTPUT RELAYS The unit MM30-DK includes four (R1, R2, R3, R4) user programmable plus one diagnostic (R5) output relays. In the version MM30-DKX the number of output relays can be increased by the addition of one or two optional Relay Expansion modules REX-8. - Page 17 Doc. N° MO-0050-ING MM30-DK Rev. Pag. 17 of 36 Any of the functions featured by the MM30-DK can be programmed to control up to four out of the sixteen user programmable output relays Copyright - 2010 - Microener...
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Page 18: Serial Communication
The relays R5, R DIAG are not user programmable; they are normally energized and get deenergized on : - internal fault of MM30-DK - Internal fault of REX-8 R5 - MM30-DK power supply failure - REX-8 power supply failure R DIAG - during the programming - Interruption/fault on the serial... -
Page 19: Digital Inputs
10 ms). If any internal fault is detected, the display shows a fault message, the Led "PROG/IRF" illuminates and the relay R5 is deenergized. Complete test activated by the keyboard or via the communication bus either with or without tripping of the output relays. Copyright - 2010 - Microener... -
Page 20: Keyboard And Display Operation
- Yellow key ENTER/RESET : It allows the validation of the programmed settings the actuation of test programs the forcing of the default display indication the reset of signal Leds. e) - Indirect key : Enables access to the programming. Copyright - 2010 - Microener... -
Page 21: Reading Of Measurements And Recorded Parameters
As above, earth fault current. Soxxxx%n Sd/mxxx% Positive sequence current component during starting time. Ss/mxxx% Negative sequence current component during starting time. Measurement of the Motor Starting time. tStxxxxs SUoxxxxV Zero sequence voltage during the starting time. Copyright - 2010 - Microener... -
Page 22: Trip Num
Enter the mode "SET DISP", select the menu "SETTINGS" or "F RELAY", scroll information available in the menu by keys "+" or "-". SETTINGS= values of relay's operation parameters as programmed RELAY= output relays associated to the different functions as programmed. Copyright - 2010 - Microener... -
Page 23: Programming
Motor starting time Switch-over current of motor starter Dis – 0.1 – 1 ITr0.5Ist (p.u. of motor starting current) Max switch-over time from reduced to full voltage operation 0.5 – 50 tTr 6s during motor starting. Copyright - 2010 - Microener... - Page 24 Enabling of input 1 – 3 for operation of the Speed Control function OFF – ON SpC OFF Clock synchronisation Time 5-10 Tsyn Dis m Expected time interval between sync. signal. 5 - 60 - Dis 15-30 60-Dis The setting Dis indicates that the function is disactivated. Copyright - 2010 - Microener...
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Page 25: Programming The Configuration Of Output Relay
R1, R2, R3, R4 tO> ---2 RA,RBRL Remote trip command (input 1-2) operates relay R1, R2, R3, R4 ---- RA,RBRL Time delayed Phase loss tripping operates relay R1, R2, R3, R4 1 ---1 RA,RBRL Copyright - 2010 - Microener... -
Page 26: Manual And Automatic Test Operation
This is extremely important as discharges eventually tacking place in other parts or components of the board can severely damage the relays or cause damages, not immediately evident to the electronic components. Copyright - 2010 - Microener... -
Page 27: Electrical Characteristics
Tel. (##39) 02 575731 - Fax (##39) 02 57510940 - Telex 351265 MIELIT I http://www.microelettrica.com ute@microelettrica.com e-mail : The performances and the characteristics reported in this manual are not binding and can modified at any moment without notice Copyright - 2010 - Microener... -
Page 28: Connection Diagram (Standard Output)
Doc. N° MO-0050-ING MM30-DK Rev. Pag. 28 of 36 16. CONNECTION DIAGRAM (SCE1495 Rev.2 Standard Output) 16.1 - CONNECTION DIAGRAM (SCE1756 Rev.0 Double Output) Copyright - 2010 - Microener... -
Page 29: Wiring The Serial Communication Bus
Doc. N° MO-0050-ING MM30-DK Rev. Pag. 29 of 36 17. WIRING THE SERIAL COMMUNICATION BUS (SCE1309 Rev.0) 18. CHANGE PHASE CURRENT RATED INPUT 1 OR 5A Copyright - 2010 - Microener... -
Page 30: Thermal Image Curves
Doc. N° MO-0050-ING MM30-DK Rev. Pag. 30 of 36 19. THERMAL IMAGE CURVES (TU0249 Rev.1) Copyright - 2010 - Microener... -
Page 31: Inverse Time Unbalance Protection Element
Doc. N° MO-0050-ING MM30-DK Rev. Pag. 31 of 36 20. INVERSE TIME UNBALANCE PROTECTION ELEMENT (TU0248 Rev.1) Copyright - 2010 - Microener... -
Page 32: Direction For Pcb's Draw-Out And Plug-In
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). Copyright - 2010 - Microener... -
Page 33: Overall Dimensions / Mounting
Doc. N° MO-0050-ING MM30-DK Rev. Pag. 33 of 36 22. OVERALL DIMENSIONS / MOUNTING Copyright - 2010 - Microener... -
Page 34: Keyboard Operational Diagram
Doc. N° MO-0050-ING MM30-DK Rev. Pag. 34 of 36 23. KEYBOARD OPERATIONAL DIAGRAM Copyright - 2010 - Microener... -
Page 35: Setting's Form
Enabling of the input 1 – 14 for operation of RTD OFF – ON function Enabling of input 1 – 3 for operation of the Speed OFF – ON Control function Clock synchronisation Time Tsyn 5-60-Dis Expected time interval between sync. signal. Copyright - 2010 - Microener... - Page 36 Instantaneous earth fault tripping O> O> Time delayed earth fault tripping tO> tO> Remote trip command (input 1-2) Time delayed Phase loss tripping 1 1 Commissioning Engineer : Date : Customer Witness : Date : Copyright - 2010 - Microener...
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