MICROELETTRICA MC40-SEF Operation Manual Download Page 13

Page: 13 / 36

MC40-SEF

Doc. N°

MO-0475-ING

FW: 1320.38.01.x

Date

06.09.2022

Rev.

Pag.

3.3 - I>> (2F51) - Second overcurrent protection level

FuncEnab

→

Enable

[Disable / Enable]

Options

→

Disable

[Disable / Enable]

→

2xI

Disable

[Disable / Enable]

→

Trg

Enable

[Disable / Enable]

TripLev

→

I>>

2.00

(0.50



40.00)

step 0.01

Timers

→

tI>>

1.00

(0.05



60.00)

step

0.01

→

t2xI

0.10

(0.02



9.99)

step

0.01

Description of variables

FuncEnab

: If disable the function is deactivated

: Operation controlled by Blocking Digital Input

2xI

: Automatic threshold doubling on inrush

Trg

: Function operation triggers the oscillographic wave form capture

(see § Oscillographic Recording)

I>>

: Trip level (limited to 40 times In)

tI>>

: Trip time delay

t2xI

: Trip time delay

Trip when

: The

current trip level is exceeded for time “tI>>”.

When the function is tripped

Signalization

Led “Trip” is illuminated

Last Trip

= Is recorded

Function reset when

: The current drop below 95% I>>.

Led reset when

: push-button is pressed

Summary of Contents for MC40-SEF

Page 2: ...ding _________________________________________________________________18 3 14 Comm Communication Parameters ____________________________________________________________19 3 15 LCD Display and Buzzer o...

Page 3: ...fety Protection Carefully check that all safety means are correctly mounted apply proper seals where required and periodically check their integrity 1 9 Handling Notwithstanding the highest practicabl...

Page 4: ...when you wish dispose of it Instead it should be handed over to an applicable collection point for the recycling of electrical and electronic equipment By ensuring this product is disposed of correctl...

Page 5: ...ed Digital Inputs RS485 communication port independent from the RS232 port on front panel Totally draw out execution with automatic C T shorting device Input currents are supplied to 4 current transfo...

Page 6: ...1 In 2 2 2 Input quantities 2 2 2 1 Mains Frequency Freq The relay can operate either in 50Hz or 60Hz systems The rated Mains Frequency Freq must be set accordingly 2 2 2 2 Phase Current inputs I1 Th...

Page 7: ...time delay t I Ts when tr Operation time of the output relay on pick up 7ms The parameters A and a have different values for the different Time Current Curves Curve Name Curve Identifier A B a IEC A I...

Page 10: ...to the square of the largest phase current I Allowed overloading time See Curve The trip time delay t of the thermal element depends on the warming up time constant tw on the previous thermal status I...

Page 12: ...efinite Time A IEC A Inverse B IEC B Very Inverse C IEC C Extremely Inverse MI IEEE Moderate Inverse Curve VI IEEE Very Inverse Curve I IEEE Inverse Curve EI IEEE Extremely Inverse Curve SI IEEE Short...

Page 13: ...Description of variables FuncEnab If disable the function is deactivated BI Operation controlled by Blocking Digital Input 2xI Automatic threshold doubling on inrush Trg Function operation triggers t...

Page 14: ...r time tIH When the function is tripped Signalization Led Trip is illuminated Last Trip Is recorded Function reset when The current drop below 95 IH Led reset when push button is pressed 3 4 1 Automat...

Page 15: ...ographic Recording Io Trip level tIo Trip time delay Trip when The current trip level is exceeded for time tIo When the function is tripped Signalization Led Trip is illuminated Last Trip Is recorded...

Page 16: ...ripped Signalization Led Trip is illuminated Last Trip Is recorded Function reset when The current drop below 95 IoH Led reset when Push button is pressed 3 8 So Sensitive Earth Fault protection level...

Page 17: ...rip is controlled via the Digital Input D2 FuncEnab Disable Disable Enable Options No Param No Parameters TripLev No Param No Parameters Timers No Param No Parameters Description of variables FuncEnab...

Page 18: ...disactivated Trg Disab Function Disable no recording Start Trigger on time start of protection functions Trip Trigger on trip time delay end of protection functions Ext Inp Trigger from the Digital I...

Page 19: ...d Rate Front panel RS232 communication speed RBd Remote Baud Rate Rear panel terminal blocks RS485 communication speed Mod Remote mode communication parameters Note Any change of this setting becomes...

Page 20: ...Protection Relays set with the same trip time delay that send the activation signal to the blocking Input D2 can trip before open and the C B nearest to the Fault Also in this case however another 2xt...

Page 21: ...is started 7 Self diagnostic The relay incorporates a sophisticated self diagnostic feature that continuously checks the following elements A D conversion Checksum of the settings stored into E2 Prom...

Page 22: ...an 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 The 2...

Page 23: ...hen any function is tripped reset takes places by pressing the reset button d PWR I R F Illuminated during normal operation when Power Supply is ON Flashing when a Relay Internal Fault is detected Whe...

Page 24: ...physical link is RS485 and the Communication Protocol is MODBUS RTU IEC60870 5 103 The configuration of transmission parameters is selectable Baud Rate 9600 19200 bps 9600 19200 bps 9600 19200 bps St...

Page 25: ...ication 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 ava...

Page 26: ...ion I 0 65535 In Largest of the 3 phase currents of rated current IA 0 65535 A RMS value of Phase A current Primary Amps IB 0 65535 A RMS value of Phase B current Primary Amps IC 0 65535 A RMS value o...

Page 27: ...he TRIP Cause the following acronyms are used T Thermal Image I 1st Overcurrent Short Circuit I 2nd Overcurrent Short Circuit IH 3rd Overcurrent Short Circuit Io 1st Neutral Element Io 2nd Neutral Ele...

Page 28: ...ear XX MM to set month XX XX DD to set day XX XX XX hh mm to set hour XX mm to set minutes To validate Set Done Exit 12 5 3 RatedVal Rated Input Values RatedVal 1st Variable to scroll variables to mod...

Page 29: ...ling on inrush Enable Disable Trg Enable Function operation triggers the oscillographic wave form capture Enable Disable TripLev I 2 00 In Trip level of overcurrent protection 0 50 40 00 0 01 Timers t...

Page 30: ...e Disable Options No Parameters TripLev No Parameters Timers No Parameters IRF FuncEnab No Parameters Options Opl NoTrip Operation of output Relays on detection of Internal Relay Fault NoTrip Trip Tri...

Page 31: ...OpMode N D N D Normally Deenergized N E Normally Energized N D N E Relay2 R2 Link BF Association of functions to output relay R2 T Ta I tI I tI IH tIH Io tIo Io So tIo tIoH tSo BF RTD IRF CBopen CBclo...

Page 33: ...ification or to issue a command through the relay itself using the managing software MSCom The user can decide whether inserting his own password see MS Com Operational Manual or keeping the password...

Page 35: ...ntal 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 Slide in the card on the...

Page 36: ...Hz 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 interru...

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