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Digital Protective Relays

Larsen & Toubro

Mysore Works

The L&T Switchgear training centres at Pune, Lucknow & Coonoor are the only facilities of their kind in India. These centres have state-of-the-art training facilities, well-equipped workshop & testing systems.

Training programmes on protective relaying and related subjects are regular ly conducted at above training centres.

Larsen & Toubro Limited offers a wide range of Microprocessor based State-of-the-art digital protective relays suitable for LV, MV and HV power distribution systems. These relays are manufactured at L&T’s Mysore works equipped with modern infrastructure and employing latest manufacturing and testing equipments. L&T’s range also include relays for special applications manufactured by Microelettrica Scientifica, Italy. The applications include Feeder Management, Load Sharing, Load Shedding, Synchronising, Grid Islanding etc.

L&T also manufactures a range of electronic single phase energy meters, three phase energy meters and trivector meters at the Mysore works.

Lucknow Pune Coonoor

Training Centres

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Control & Supervision Relays - MW33

Synchronising Load Sharing Relays - SPM21, RRS

ANSI / IEEE Device Function Number Details

Time - Current Characteristics

Over Current Relays & Earth fault Relays - MC31A, MC61A, MC61C

Current Sensing Relays - MC12, ME12, SC14S

Secondary Relays - TCS01, PTF03

Power Factor Control Relays - RPM14, RPM08

Motor Protection Relays - MM30, MM30W, MPR300, N-DIN-MA

Generator Protection Relays - MG30, MG30I, MD32G

Transformer Protection Relays - IM30T, MD32T, MD32TM

Voltage and Frequency Relays - MC1V, MC3V, UFD34

Feeder Protection Relays - MC20, MC30, FMR

Vector Surge Protection Relay - UM30A

Neutral Displacement Relay - MND11

Reverse Power Relay - MRP11

Voltage Relay - MV12

Contents

Correlation between ANSI/IEEE device Function number and Relays

Function Name

Device No.

L&T Relays

MS Relays

Under impedance relay / Distance relay Auto Synchronising Synchro-check relayAC under voltage relay

Power directional relayUnder current or under power relay

Field control (loss of field) relayDC over voltage relayReverse phase or phase balance current relay

Phase-sequence or single-phasing voltage relayMachine or transformer thermal relay

Instantaneous over current (or rate-of-rise) relay

Voltage restrained over current relayBreaker - failure Instanteneous earth fault over current relay

AC time over current relay

Ground fault time over current relay

Rectifier failure relay (rotating diodes)AC over voltage relay

Overexcitation relay V/HzVoltage balance relayGround detector (insulation to ground failure of machine or other apparatus)Machine stator ground fault detector relayMachine rotor ground fault detector relayAC directional over current relayDirectional ground fault over current relayDC over current relayPhase angle measuring or out of-step protection relayReclosing relayDC under voltage relayFrequency relay

Lock-out relayDifferential protective relay

Ground fault differential protective relayRegulating device to adjust a quantityAutomatic active or reactive load sharing relay Vector surge protection relay Rate of change of frequency

MV12

MRP11

ME12MC12AMC61A / MC61C

MC12AMC61AMC61CMC12AMC61AMC31AMC61CMC12AMC61AMC31AMC61C–MV12----

--------––----–----SC14S--–––

–

MG30 / MG30-ISPM21SCM21UM30-A / MC1V / MC3VUFD34MG30 / MW33 / MG30-IMM30MW33MG30 / MG30-IUBC / 45IM30TMM30UM30-A, MC3VIM30TMG30 / MG30-IMM30 / MM30-WMC20 / MC30IM30-T / IM30-APFMRMG30 / MG30-I MG30 / MG30-IMC20 / MC30 / FMR / IM30T / IM30APIM30 AP / IM30-TMC20 / MC30FMR / IM30-TIM30 - AP / IM30-TMC20 / MC30FMR / IM30-T--IM30 - AP / IM30-TMC20 / MC30FMR--RHS--UFD34, MW33UM30-A / MG30 / MG30-IUM30-AMG30MG30UBO / CRFMRFMR–IM30-GOS MC20RUBC / 80UM30-ASV / MG30 UFD34 / MC1V / MC3V / MW33--MD32GMD32T / MD32TMMD32G, MD32T--RRSUM30-AUFD34

2125 27 3237 404546 4749

50

51V, 50V50BF 50N

51

51N-(51G)

5859 59/81 606464S64R6767N-(67G)7678798081 8687

87N-(87G)9095

df/dt

1

ANSI/IEEE

2

Time - Current Characteristics (At TMS = 1)

A : Normal Inverse 3.0 Sec. B : Normal Inverse 1.3 Sec. C : Very InverseD : Extreme Inverse

For Trip time at TMS other than 1Trip time = (Trip time at TMS = 1) x TMS OR 50msec whichever is more

Product design standards

Reference standardsIEC 60255, IEC 61000, IS3231, IS8686

Dielectric test : IS 3231 / IEC 60255-5 Impulse test : IS 8686 / IEC 60255- 5 HF disturbance test : IS 8686 / IEC 60255-22-1 Electrostatic discharge test : IEC 61000-4-2Electrical fast transient : IEC 61000-4-4Radiated electro magnetic field test : IEC 61000-4-3Surge immunity : IEC 61000-4-5Ring wave test : IEC 61000-4-12Voltage dips & interruption test : IEC 61000-4-11Power frequency magnetic test : IEC 61000-4-8

Multiple of set current (Is)

Tri

p T

ime

(S

ec

.)

A

B

C

D

1,000

100

10

1

01

1 10 20

Time - Current Characteristics

Salient Features • Display of currents, settings, Trip data & Trip history for analysis & trouble shooting

• Built in self supervision & self testing feature to ensure continuous reliability

• Separate indication for power ON & programming mode on relay fault

• Separate fault indication

• In MC61C - Communication with computer & breaker control through RS485 Port

• Four user programmable output relays

Over Current and Earth Fault Relays• Three Phase Over Current & Earth fault Relays

Description

Device CodeDesignFunctions Available

Settings

Other Features

Burden on CTBurden on PTOperating tempWeightBurden on Auxiliary supplyOutput ContactConstructionDim W x H x D in mmPanel Cut Out

Auxiliary supply Type 1 Type 2CT rating

Output Contacts

3 Phase O/C + E/F

0C

51 RYBNNumerical RelayLowset O/C -IsLowset E/F -Os

O/C Is = 20-200% Step 5% E/F Os = 5-80% Step 5% Time Characteristics available -NI, VI, EI, Definite TimeTMS 0.1 - 1.6 Step 0.05

Site selectable Trip time Char.

Display of Currents, Trip count Self supervision feature

≤ 0.25 VA on CT/PhaseNot applicable

00 to 60 C < 2kg≤ 10 VA1 N/O Contact for self suprvnDraw out121 x 158 x 224113 x 142

20-110 V AC / DC or88-264 V AC / DC1 A or 5 A (site selectable)4 NO or 2 NO + 2 NC

3 Phase O/C + E/F + Highset

0 0C

50/51 RYBNNumerical RelayLowset O/C -IsHighset O/C -IhsLowset E/F -OsHighset E/F -OhsO/C Is = 20-200% Step 5% E/F Os = 5-80% Step 5% HS O/C = (0.2 to 40) x In step of -0.2 In or disableHS E/F = (0.1 to 20) x On step of -0.1 On or disableTime Characteristics available -NI, VI, EI, Definite Time TMS : 0.1 - 1.6 Step 0.05Site selectable Trip time Char.

Highset can be disabledDisplay of Currents, Trip count Self supervision feature

≤ 0.25 VA on CT/PhaseNot applicable0 to 60 C < 2kg≤ 10 VA1 N/O Contact for self suprvnDraw out121 x 158 x 224113 x 142

20-110 V AC / DC or88-264 V AC / DC1 A or 5 A (site selectable)4 NO or 2 NO + 2 NC

3 Phase O/C + E/F + Highset Communication and breaker control

0 0C

50/51 RYBNNumerical RelayLowset O/C -IsHighset O/C -IhsLowset E/F -OsHighset E/F -OhsO/C Is = 20-200% Step 5% E/F Os = 5-80% Step 5% HS O/C = (0.2 to 40) x In step of -0.2 In or disableHS E/F = (0.1 to 20) x On step of -0.1 On or disableTime Characteristics available -NI, VI, EI, Definite TimeTMS : 0.1 - 1.6 Step 0.05HS delay:0.1-2 Sec step 0.01 -Sec. or Inst.RS485 CommunicationBreaker controlAuto doubling of highset, -Relay co-ordination - BI & BO≤ 0.25 VA on CT/PhaseNot applicable0 to 60 C < 2kg≤ 10 VA1 N/O Contact for self suprvn, 1N/O for trip Draw out121 x 158 x 224113 x 142

20-110 V AC / DC or88-264 V AC / DC1 A or 5 A(not site selectable)4 NO

MC61A MC61C

3

Model MC31A

Ordering Information

MC31A

MC61A

MC61C

MC61A

MC31A

Wiring Diagrams

R Y B R Y B1

2

4

13

5

6

15

16

7

8

3 3

1

2

4

13

5

6

15

16

7

8

22

25

26

21

L/+

N/-

In = 1A; 5A

0n = 1A; 5A

MICRO CONTROLLER

PROTECTION

F50(Is)

F51(0s)

R Y B E

PROGERROR

R1

R2

R3

R4

R5

N0

NC

9

10

11

12

17

18

27

28

29

30˜

R Y B R Y B1

2

4

13

5

6

15

16

7

8

3 3

1

2

4

13

5

6

15

16

7

8

22

25

26

21

In = 1A; 5A

0n = 1A; 5A

L/+

N/-

MICRO CONTROLLER

PROTECTION

F50(Is)

F51(Os)

F50(Ihs)

F51(Ohs)

R Y B E

R1

R2

R3

R4

R5

N0

NC

9

10

11

12

17

18

27

28

29

30

In = 1A ; 5A0n = 1A ; 5A

R Y B R Y B1

2

4

13

5

6

15

16

7

8

3 3

1

2

4

13

5

6

15

16

7

8

22

25

26

21

L/+

N/-

˜

MICRO CONTROLLER

MC61C

PROTECTION

F50(Is)

F51(Os)

F50(Ihs)

F51(Ohs)

R Y B E

PROGERROR

R1

R2

R3

R4

R5

9

10

11

12

17

18

27

28

29

30

19

20

31

32

NO

NC

BKR

OPEN

CLOSE

BKR

L/R

BI*

C

S-

S+

9 PIN MALE

D1

D2

D3

4

PROG.ERROR

Model SC14S

Salient Features

• Easy setting through front panel DIP switches

• Indication for Power ON and trip status

• Test feature - helps in better maintenance • Compact, light weight helps in reducing panel size & thickness

5

• •

Single Phase Over current / Earth fault RelaySensitive E/F Relay / Instantaneous Current Relay

Current Sensing Relays

DescriptionDevice CodeDesignFunctions Available

Settings

Other Features

Burden on CTBurden on PTOperating tempWeightBurden on Auxiliary supplyOutput ContactsConstructionDim W x H x D in mmPanel Cutout

Auxiliary supply Type 1 Type 2CT ratingRange Setting

1 Ph O/C or E/F

≤

0 0C

≤

or

50/51 or 50N/51NMicrocontroller BasedLowset O/C -IsHighset O/C -IhsLowset E/F -OsHighset E/F -IsO/C Is = 50-200% Step 10% ORE/F Is = 10-40% Step 2% ORE/F Is = 20-80% Step 4%HS O/C = (2-16) xls step 2 IsHS E/F = (2-16) xls step 2 IsTime Characteristics available-Nl, VI, EI, Definite Time3 ranges of def Time (1, 10,100)TMS : 0.1 - 1.6 Step 0.1Site selectable Trip time Char.Highset can be disabled

0.25 VA on CT Not applicable 0 - 60 C< 1.5kg

5.5 VA2 C/O Contacts (S/R)Draw out71 x 158 x 22462 x 142

20-110 V AC / DC or88-264 V AC / DC1 A or 5 A10-40% or 20-80% 50-200%Site Selectable

Instantaneous current relay

≤

0 0C

87N/64RStatic

Is = 10-40% step 5%OR 20-80% step 10%

Time Characteristics available-Instantaneous (25ms) OR time delayed 100ms / 200msSelf PoweredRelay testing possible by ext. 24 V -SupplyFlag indication / LED indication

6 VANot Applicable 0 to 60 C< 1.5kgNot Applicable2 C/O Contacts (S/R)Draw out71 x 158 x 22462 x 142

Not Applicable

1 A or 5 A10-40% or 20-80%

1 Ph Sensitive E/F

Time Characteristics available- NI, VI, EI, Definite Time 3 ranges of def Time (1, 10, 100)TMS : 0.1 - 1.6 Step 0.1Site selectable Trip time Char.Highset can be disabledHarmonic rejection≤ 0.25 VA on CTNot applicable

0 00 C to 60 C< 1.5kg≤ 5.5 VA2 C/O Contacts (S/R)Draw out 71 x 158 x 22462 x 142

20-110 V AC / DC or88-264 V AC / DC1 A or 5 A

50N/51NMicrocontroller BasedLowset S E/F -IsHighset S E/F -Ihs.

S E/F = 1-16% step 1%HS S E/F = (2-16) xlsin steps of 2 ls

MC12A ME12A


MC12A / ME12A

SC14S

6

1

2 +VE/PH.

-VE/NR1

COM

COM

SETTING RANGE (Is)

Aux. Supply

µP. ControlCkt.

F50/50NF51/51N

3

10

11

12

1AIn MC12A

(10-40)% In(20-80)% In(50-200)% In

ME12(1-16)% In

5A

AUX SUPPLY24 - 110V AC/DC95 - 240V AC/DC

MC12A / ME12

Wiring Diagrams

11

10

9

7+

8

12

SC14S

Test (24V)Voltage

DC-DC

Convrt.

Test

ControlCkt.

R

2

1

3

5

6

4

In1A5A

CT OPERATED RELAYNO AUXILIARY SUPPLY REQUIRED

SETTING RANGE (Is)(10-40)% IN(20-80)% IN

˜

Model MND11 MRP11 MV12

Salient Features


• LED indication for Power ON and trip status

• Test feature - helps in better maintenance • Compact, light weight helps in reducing panel size & thickness

7


Settings

Other Features

Burden on PTBurden on CTOperating tempWeight Burden on Auxiliary supplyOutput ContactsConstructionDim W x H x D in mmPanel Cutout

Auxiliary supply Type 1 Type 2CT RatingPT Rating

Neutral Displacement59 Vo

0 0C

Microcontroller BasedVoltage relay for E/F Protectionof generator earthed thro’neutral earthing transformerFault voltage Vs -2% - 32% of Vn step 2%Alarm voltage Vis -2% - 32% of Vn step 2%Time Characteristics available- Inverse time, Definite time TMS : 0.1 - 1.6 Step 0.1LED indication for power ON, time characteristics, tripTest featureThird harmonics rejection 26db ≤ 0.25 VA Not Applicable0 to 60 C< 1.5 kg≤ 7 VA1 N/O +1C/O Contacts (S/R)Draw out71 x 158 x 22462 x 142

20-110 V AC / DC88-264 V AC / DCNot Applicable110 V AC

Microcontroller BasedLowset U/V - VsLowset O/V - Vs

U/V Vs = 95-20% step 5%O/V Vs = 105-180% step 5%Time Characteristics available- Inverse time, Definite time TMS : 0.1 - 1.6 Step 0.1

Site selectable U/V OR O/VSite selectable Trip time Char.

≤ 0.075 VA on PT0 to 60 C< 1.5 kg≤ 8 VA2 C/O Contacts (S/R)Draw out71 x 158 x 22462 x 142

20-110 V AC / DC88-264 V AC / DCNot Applicable110 V / 240 V / 415 V (site selectable)

1 Ph U/V OR O/V27 OR 59

< 0.25 VA

0 0C

Microcontroller BasedReverse Power Level

PT input Vn 110 V, 415 V ACCT input In 1 A / 5 APick up level 1% - 15%Min. setting 0.5%TMS 0 to 1.5 step 0.1Definite time characteristics

LED indicationTest feature

< 0.25 VA < 0.05 VA0 to 60 C< 1.5 kg< 8 VA1 N/O + 1 C/ODraw out71 x 158 x 22462 x 142

20-110 V AC / DC88-264 V AC / DC1A 5 AUpto 380 V AC

Reverse Power32

0 0C

or

Neutral Displacement Relay, Reverse Power Relay,Under Voltage or Over Voltage Relay


MV12

MRP11

MND11

8

µP.Control

Ckt.F64

R Y

14

5

7

8

6

11

µP.

Control

Ckt.

F32

R1

Vn110 V AC 1 A415 V AC 5 A

In AUX SUPPLY24–110 V AC/DC95–240 V AC/DC

MRP11

12

2 + VE / PH.

– VE / N

Aux. Supply3

9

10

B

Wiring Diagrams

5

4

6

8

9

7

R1µP.Control

Ckt.F27F59

1

2

3

11

12

MV12

+VE/PH.

Aux. Supply

-VE/N

R Y B

1

2

3

4

11

12

L /+

Aux. Supply

N /-

MND11

R1

R2

PT VOLTAGE : 110V AC

6

7

5

9

10

4

Model TCS 01

Secondary Relays

9

Salient Features


• Indication for power ON and trip status

• Test feature - helps in better maintenance • Compact, light weight - in reducing panel size & thickness

• Low power burden

• •

Trip Circuit Supervision RelayPT Fuse Failure Relay

Trip Circuit supervision95 ABCStaticPost Close SupervisionPre Close SupervisionNot ApplicableTrip coil supply 110 - 220 V ACOR 24 - 48 - 110 - 220 V DCOperation time 500+/-100mSReset time < 150 mSSame Relay for all RatingTrip supply U/V indicationCB ON/OFF status indication

Not applicable Not applicable

0 00 C to 55 C1.5kg< ≤10 VA 2 C/O Contacts (S/R)Draw out71 x 158 x 22462 x 142

20-110 V AC / DC or80-264 V AC / DC

PT Fuse Failure Relay

0

60Static3 Phase PT fuse failure

110 V AC PT Not Applicable

Operation time ≤ 7mS

LED Indication for each phase, Relay trip statusSelf poweredHigh speed operationNot Applicable< 5 VA per phase on PT

00 C to 55 C< 1.5kgNot Applicable2 C/O Contacts (S/R)Draw out71 x 158 x 22462 x 142


RatingSettings

Other Features

Burden on CTBurden on PTOperating tempWeight Burden on AuxiliaryOutput ContactsConstructionDim W x H x D in mmPanel Cutout

Auxiliary supply Type 1 Type 2

PTF 03


TCS 01

PTF 03

10

Wiring Diagrams

L /+

TRIPRELAY

CONTACT

TRIP COILSUPPLY

(20 - 264VAC / DC

BKR.AUX.

CONT.

TC

N/ -

1

2

3

4

13

15

12

11

14

L /+

N/ -

Aux. Supply

TCSCKT.

R1

TCS 01

Aux. Supply 20-110V AC/DC88-264V AC/DC

6

5

7

9

10

8

FROM PTSEC. 110VAC PH. -PH.

R

Y

B

N

FUSE

FUSE

FUSE

LOAD

LOAD

LOAD

1

2

11

12

13

14

15

16

17

PTFCKT.

R1

PTF 03

6

5

7

9

10

8

RPM-8Model

• (8 & 14 Stages) Intelligent Power Factor Controller Relay

Salient Features

•

•

•

• On line display of system PF

• Easy setting through - front panel push button

Suitable for non-uniform banks

• LED indication for alarm code, no. of Banks selected, PF status- lead / lag / unity

Auto / Manual mode

Measurement sensitivity of 1%

• Automatic C/K correction

• Display of cuttent, Voltage, KVAR, & Capacitor values

11

Power Factor Control Monitoring Relays

Description


Settings

Other Features

Burden on CTBurden on PTOperating tempWeightOutput Contacts

Dim W x H x D in mmPanel Cutout

Auxiliary supply

Automatic

Microcontroller BasedAutomatic PF control upto8 stageSwitching time 1-255 Sec.in step of 1 sec for sameBank switchingAuto C/K sellectionPF control range 1% to 120% ofrated current Can accept unequal banksDisplay of PF, V, l, KVARLED indications for faultsAlarm signal for CT reversal, under current, Under compensation, over compensation, over voltage,1 A / 5 A field selectable0.3 VA≤ 15 VA

00 to 60 C< 2kg8 N/O1 N/O contact for alarm144 x 144 x 100138 x 138

240 V AC

Power Factor Controller8 stage

0C

RPM-14 Automatic

Microcontroller BasedAutomatic PF control upto14 stageSwitching time 1-255 Sec.in step of 1 sec for sameBank switchingAuto C/K sellectionPF control range 1% to 120% of rated current Can accept unequal banksDisplay of PF, V, l, KVARLED indications for faultsAlarm signal for CT reversal, under current, Under compensation, over compensation, over voltage,1 A / 5 A field selectable0.3 VA≤ 15 VA

00 to 60 C< 2kg14 N/O1 N/O contact for alarm144 x 144 x 100138 x 138

240 V AC

Power Factor Controller14 stage

0C


12

Wiring Diagrams

RPM-8

RPM-14

123456789101112

R1R2R3R4R5R6R7R8R9R10R11R12

131415161718192021222324

R13R14

-

++

RYBN

S2S1(1A)S1(5A)

AL

AR

M

Ph240V AC

50 HzN

BANK #1

BANK #14

TOLOAD

1

2

3

4

5

6

7

8

9

10

11

12

S1(5A)

S1(1A)

S2

AL

AR

M

+

+-

R

Y

B

N

R8

R7

R6

R5

R4

R3

R2

R1

13

14

15

16

17

18

19

20

21

22

23

24

Ph230V AC

50 HzN

BANK #8

TO

LOAD

BANK #1

• Motor Protection Relay• Motor Protection Relay with Voltage input• Lowcost Motor Protection Relay

Motor Protection Relay

Salient Features

• Display of various parameters, trip count and trip data on 8 digit alphanumeric display

• Separate LEDs for individual fault indication


• Built in self supervision & self testing feature helps maintenance

• Easy operation by 5 push buttons

• RS485 Port for serial communication with “MSCOM” user friendly software

13

DescriptionDevice Code

DesignFunctions Available

Other Features

Burden on CTBurden on PTOperating tempWeightBurden on AuxiliaryOutput ContactsConstructionDim W x H x D in mm

Auxiliary supply

Motor Protection50/51, 51LR, 64, 68, 49, 46, 37, St no, ltr

0 0

NumericTrip circuit supervision Thermal O/L and Pre-alarmLocked RotorCurrent unbalance, phase reversal, Phase lossOver CurrentEarth FaultRepeat and prolonged startsRestart InhibitionNo load runningBlocking Function

Auto setting1 A or 5 A site selectable(Default 5 AMP)Selectable motor time constant (1 - 60 min)Display of parametersBuilt in self supervisionRS485 port0.2 VA for 5 A, 0.01 VA for 1 ANot Applicable 10 C to 60 C< 2kg8.5 VA4 C/O + 1 C/O for self supervisionDraw out121 x 158 x 224113 x 142

20-110 V AC / DC or88-264 V AC / DC

Model MM30

Motor Protection

0 0C

49, 51LR, 46, 37, 50/51, 64, StNo, Itr

NumericThermal O/L and Pre-alarmLocked RotorCurrent unbalance, phase reversal, phase lossOver CurrentEarth FaultRepeat and prolonged startsRestart InhibitionNo load runningBlocking Function

2 Programable digital inputs1 Removable front face panelLCD Display1 A or 5 A site selectable (Default 5 AMP)Selectable motor time constant (1 - 60 min)Display of parametersBuilt in self supervisionRS485 port, front RS232 port (on FFP)0.075 VA for 5 A, 0.01 VA for 1 ANot Applicable 10 to 60 C< 1kg3 VA2 C/O ContactsDIN rail mountingFFP = 106 x 45 x 16RMB = 106 x 85 x 72

20-110 V AC / DC or88-264 V AC / DC

N-DIN-MA

Motor Protection50/51, 51LR, 64, 49, 46, 37, St no, ltr, 55, 68, 81, 47, 12/14, 27/59

0 0

NumericTrip circuit supervision Thermal O/L and Pre-alarmLocked RotorCurrent unbalance, phase reversal, phase lossOver CurrentEarth FaultRepeat and prolonged startsRestart InhibitionNo load runningBlocking FunctionUnder frequency / over frequency Under voltage / over voltage Running hours Low PF Auto setting1 A or 5 A site selectable (Default 5 AMP)Selectable motor time constant (1 - 60 min)Display of parametersBuilt in self supervisionRS485 port0.2 VA for 5 A, 0.01 VA for 1 ANot Applicable 10 C to 60 C< 2kg8.5 VA4 C/O + 1 C/O for self supervisionDraw out121 x 158 x 224113 x 142

20-110 V AC / DC or88-264 V AC / DC

MM30W


MM30

N-DIN-M

14

L/+

N/-

MPR300

R Y B

StartN/O

Stop (N/C)

Aux. Supply

Typical connection diagramfor 'Direct Starting' application

MPR300

M

NC NO

1 2 3 4 5 6 7 8

Aux. N/O

N

Wiring Diagrams

A B C A B C25

26

27

28

29

41

30

32

39

25

26

27

28

39

29

413032

43

31

42

33

43

31

42

33

44

In=1A

In=5A

PRESA/TAP 31:Ion=5A

PRESA/TAP 33:Ion=1A 12

13 ˜˜

˜

˜̃̃

=

DISPLAY

MICROP.

MM30

FUNCTION

F37F46F49F51F51RF64St.No.>AI.0>Itr

PROGR.

INT. FAULT

KEYBOARD

R1

R2

R3

R4

R5

R1

R2

R3

R4

R5

9 PIN MALE

(21) (10)

N.O. N.O.

N.C. N.C.

2110

1122

79

8

1820

1946

5

1517

16

14

3

2

1

34/382324

CS-S+

IEC 255

A B C A B C A B C

10

11

8

9

12

13

10

11

8

9

12

13

10

11

8

9

12

13

6

7

2

1

21

22

0C

T

TDigital Input 1

Digital Input 2

THERMISTOR INPUT

COMMON

BT 2 1

D1

D2

RTD

MS - SCE 1752 - R1

FFP

Display / Keyboard / Signals

RS485

RS485

A B + 0

A B + 0

N - DIN - MFUNCTIONS

F26

F37

F46

F49

F51

F51LR

F64

St.Ctrl

PWR / I.R.F

Trip

ON

OFF

R1

RMB

R2

B (S-)

A (S+)RS485

16

17

15

14

4

5

N-DIN-M

Protections offered by MPR300 lThermal overload

Single Phasing (Phase Failure)Earth FaultLocked RotorPhase Sequence reversalCurrent UnbalanceUnder Current

l

l

l

l

l

l

Current Settings lMPR300 is available in 6 different models l1A to 2.75A; 2A to 5.5A; 4A to 11A; 8A to 22A; 16A to 44A; 32A to 88A

Auxiliary Supplyl240 V AC l110 V AC

• Multifunction Generator Protection Relays• Percentage Based Generator Differential Relay

Generator Protection Relays

Salient Features

• Display of various parameters, trip count & trip data on 8 digit alphanumeric display

• Separate LEDs for various fault indication


• Built in self supervision & self testing feature help maintenance



15

DescriptionDevice Code


Other Features

Burden on CT

Burden on PTBurden on Auxiliary supplyOperating tempWeightOutput Contacts

ConstructionDim W x H x D in mmPanel Cutout


Generator Protection21, 24, 27/59, 32, 37, 40, 46, 49,

0 0C

3 C/O+(1 N/O + N/C)+separate relay1 C/O for self supervision

50/27, 50V/51V, 51BF, 60FL, 64S, 68, 81NumericTwo levels of voltage controlled O/C,Thermal Image with pre-alarm,Two levels of current unbalanceTwo levels of under / over voltageTwo levels of under / over frequency95% + 100% Stator Earth fault, Two levels of Over excitationTwo levels of Under impedance,Loss of Field, Under PowerPT Fuse Failure, Breaker Failure,Inadvertent C/B Closure etc.1 A or 5 A site selectableDisplay of ParametersBuilt in Self supervisionRS485 Port, MODBUS protocol.Blocking inputs & Blocking outputs0.25 VA for 5 Amp CT0.01 VA for 1 Amp CT0.05 VA (MG30)8.5 VA10 to 60 C< 2kg

Draw out121 x 158 x 224113 x 142

20-110 V AC / DC or88-264 V AC / DC

Generator Differential

0 0C

87, 50/51, 64S/87N, 68

NumericGenerator Differential Bias % with dual adjustable -slopeOver Current Stator E/F CB Failure protection

1 A or 5 A site selectableDisplay of ParametersWave form capture feature Built in Self supervision, -RS485 Port0.2 VA for 5 A, 0.01 VA for 1 ANot Applicable

8.5 VA-10 to 60 C< 2kg4 C/O, S/R or H/R or Time del1 C/O for self supervisionDraw out121 x 158 x 224113 x 142

20-110 V AC / DC or88-264 V AC / DC

Model MG30 MD32-G

Generator Protection21, 24, 27/59, 32, 37, 40, 46, 49,

0 0C

3 C/O+(1 N/O + N/C)+separate relay1 C/O for self supervision

50/27, 50V/51V, 51BF, 60FL, 64S, 68, 81NumericTwo levels of voltage controlled O/C,Thermal Image with pre-alarm,Two levels of current unbalanceTwo levels of under / over voltageTwo levels of under / over frequency95% stator Earth faultTwo levels of Over excitationTwo levels of Under impedance,Loss of Field, Under PowerPT Fuse Failure, Breaker Failure,Inadvertent C/B Closure etc.1 A or 5 A site selectableDisplay of ParametersBuilt in Self supervisionRS485 Port, MODBUS protocol.Blocking inputs & Blocking outputs0.25 VA for 5 Amp CT0.01 VA for 1 Amp CT0.05 VA (MG30)8.5 VA10 to 60 C< 2kg

Draw out121 x 158 x 224113 x 142

20-110 V AC / DC or88-264 V AC / DC

MG30-I


16

MG30

Wiring Diagrams

25

26

27

283929

3041

31423243

33

44

12

13

G

1/5A

1/5A

1/5A

1/5A

1/5A

1/5A

1/5A

DISPLAY

MICROP.

R1

R2

R3

R4

R5

14

3

2

2110

1122

79

81820

1946

51517

16

14

3

2

1

FUNZIONI

1>,Z<,Uo>

R1

R2

R3

R4

R5

12>,T>

Zc<,O>

U,f

W<, Ir>

IC, 60FL

B.I./B.F.

PROGR.

INT. FAULT

KEYB0ARDTASTIERA

FUNCTION

MG30

38(a)

37(b)

TO REXRELAY

EXPANSION2324

9 PIN MALE

S–S+

C

(21 – 22)

(10 – 11)

N.O.

N.O.

N.C.

N.C.

CE

MS-SCE 1629-R0 In=1A In=5A Un=100V

MG30

MD32-G

R = Stabilising resistorZ = Protection surge arrester (if required)

L/+

N/-

DISPLAY

MICROP.

MD32-G

FUNCTION

F187GF287GF87N

87G + 87N

A B C

I1A

I1B

I1C

G

25

26

27

28

39

29

30

41

31423243

33

13

12

I2A

I2B

I2C

Z

R KEYBOARD

PROGR.

INT. FAULT

=˜˜

˜_

˜̃̃50-60

R5

R4

R3

R2

R1

R3

R2

R1

R4

R5

B3

B2

B1

9 PIN MALE

242334/381

2

3

14

16

17155

6419

2018

8

972211

1021

(21)

N.O.

N.C.

(10)

N.O.

N.C.

CS-S+

1/5A

1/5A

1/5A

1/5A

1/5A

1/5A

1/5A

MG30-I

G

In =

In =

13

12

33

43324231

4130

293928

27

26

25

1A

5A MS-SCE1759-R0

DISPLAY

MICROP.

MG30-IFUNZIONI

FUNCTION

I>, Z<, Io>

I2>, T>

IC, 60FL

B.I / B.F.

PROGR.

INT.FAULT

KEYBOARDTASTIERA

R1

R2

R3

R4

R5

R1

R2

R3

R4

R5

14

3

2

RS485

2110

1122

79

8182019465

1517

18

14

3

21

37(b)

38(0)2324

TO REXRELAY

EXPANSION

(21 - 22)

N.O. N.C.

(10 - 11)

N.O. N.C.

1/5A

1/5A

1/5A

1/5A

Zc<, >

U, 1

w< Ir>+

cs-s+

3 Phase Thermal + Over Current + Earth Fault Relay for transformer protection

• •

Percentage Based Transformer Differential Relay

Transformer Protection Relay

Salient Features

• Display of various parameters, trip count & trip data on 8 digit alphanumeric display

• Separate LEDs for individual fault indication





17

Description

Device Code


Other Features

Burden on CTOperating tempWeightBurden on Auxiliary supplyOutput ContactsConstructionDim W x H x D in mmPanel Cutout

Auxiliary Supply

3 Ph O/C, E/F + Thermal

0 0C

88-264 V AC / DC

250/51 RYBN, 49, 46, I t, 51BF, 50N/51NNumericLowset O/C Highset O/CLowset E/FHighset E/FThermal Overload Lowset current unbalance withDefinite / Inverse time trippingHighset current unbalanceInrush Energy protectionCB Failure functionBlocking function

Display of ParametersBuilt in self supervisionRS485 Port 1 A OR 5 A site selectable

0.2 VA for 5 A, 0.01 VA for 1 A10 to 60 C< 2kg8.5 VA5 C/O, S/R or H/R or Time delDraw out121 x 158 x 224113 x 142

20-110 V AC / DC

Transformer Differential + Restricted E/F

0 0C

87 RYB, 87N

NumericLowset DifferentialLowset Op time : <=30mSHighset DifferentialHighset Op time : 6-20mSRestricted Earth FaultDual slope BiasHighset can be Biased / Unbiased2nd harmonic restraint setting5th harmonic restraint settingAuto correction of CT RatioZero sequence compensationBlocking FunctionDisplay of parametersBuilt in self supervisionRS485 Port1 A OR 5 A site selectableWaveform capture feature0.2 VA for 5 A, 0.01 VA for 1 A10 to 60 C< 2kg8.5 VA5 C/O, S/R or H/R or Time delDraw out121 x 158 x 224113 x 142

20-110 V AC / DC88-264 V AC / DC

Transformer Differential

0 0C

87 RYB

NumericLowset DifferentialLowset Op time : <=30mSHighset DifferentialHighset Op time : 6-20mSDual slope BiasHighset can be Biased / Unbiased2nd harmonic restraint setting5th harmonic restraint settingAuto correction of CT RatioZero sequence compensationBlocking Function

Display of parametersBuilt in self supervisionRS485 Port1 A OR 5 A site selectableWaveform capture feature0.2 VA for 5 A, 0.01 VA for 1 A10 to 60 C< 2kg8.5 VA5 C/O, S/R or H/R or Time delDraw out121 x 158 x 224113 x 142

20-110 V AC / DC88-264 V AC / DC

Model MD32T MD32TM IM30T


18

MD32T / MD32TM

MD32T

R = Stabilising resistorZ = Protection surgearrester (if required)

L/+

N/-

Wiring Diagrams

˜

IEC 255 ˜˜

=

˜̃

˜

87T + 87N

A B C

In1

I1A

I1B

I1C

25

26

27

2839

V1

V2

Kv =V1

V2

29

I2A

I2B

I2C

3041

31423243

Z

33

12

13

R 50-60

1/5A

1/5A

1/5A

1/5A

KEYBOARD

PROGR.INT. FAULT

R5

R4

R3

R2

R1F187TF287TF87N

FUNCTION

MICROP.

DISPLAYR1

R2

R3

R4

R5

B3

B2

B1

9 PIN MALE

CS-S+

242334/381

2

3

14

16

17155

6419

2018

8

972211

1021

(21)

N.O.

N.O.

N.C.

N.C.

(10)

V1

V2á

IM30T

IM30T

L/+

N/-

1/5A

1/5A

1/5A

1/5A

A B C A B C A B C

25

26

27

28

39

29

41

303243

31

42

33

25

26

27

28

39

29

41

303243

31

42

33

25

26

27

28

39

29

41

303243

31

42

33

˜

˜̃˜

˜˜

=

_

44

12

13

In = 5A In = 1A

PRESA/TAP 31 Ion = 5APRESA/TAP 33 Ion = 1A

KEYBOARD

PROGR.INT.FAULT

R5

R4

R3

R2

R1

R3

R4

R5

R2

R1

F46

2I t = KF51BFF51NF50NF51F50F49

FUNCTION

MICROP.

DISPLAY

RT

BIO

BIF

CS-S+

9 PIN MALE

242334/38

1

2

3

14

16

17155

6419

2018

8

972211

1021

(21)

N.O.

N.O.

N.C.

N.C.

(10)

IEC 255

BT 2 50

1/5A

1/5A

1/5A

Model

19

MC30MC20

3P O/C + E/F + Highset + Autoreclosing (Optional)51, 51N, 50, 50N, 51BF, 79 (optional)NumericLowset O/C2 Highset O/C LevelsLowset E/F2 Highset E/F LevelsTime current curves selectable accordingto IEC/IEEE standardsAuto Reclose (In MC20-R)Breaker Failure protectionCircuit Breaker control via serial portBlocking Output and Blocking Input for pilotwire selectivity coordinationTime tagged multiple event recordingOscillographic wave form captureAccepts 3 Digital inputsDisplay LCD 16 (2 x 8) characters3rd Harmonic Filter on the neutral input currentPassword protection facility1 A or 5 A site selectableDisplay of parametersBuilt in supervisionModbus RTU / IEC870-5-103 Communication ProtocolsFront RS232 Port for Local ProgrammingOscillographic recording of input QuantitiesRS485 serial communication port on Back Panel0.1 VA for 1 A, 0.3 VA for 5 ANA< 7 VA

4 C/O ContactsDrawout83 x 164 x 22564 x 137

24-110 V AC/DC 88-264 V AC/DC

0 0-10 C to 55 C<1.5Kg

3P O/C + E/F + Highset 51, 51N, 50, 50N, 49, 51BFNumericLowset O/C2 Highset O/C LevelsLowset E/F2 Highset E/F LevelsThermal imageBreaker Failure protection Circuit Breaker control via Serial port Blocking Output and Blocking Input for pilotWire selectivity coordinationTime tagged multiple event recordingOscillographic wave form captureAccepts 3 Digital inputsDisplay LCD 16 (2 x 8) charactersT

Password protection facility

1 A or 5 A site selectableDisplay of parametersBuilt in supervisionModbus RTU / IEC870-5-103 Communication ProtocolsFront RS232 Port for Local ProgrammingOscillographic recording of input QuantitiesRS485 serial communication port on Back Panel0.1 VA for 1 A, 0.3 VA for 5 ANA< 7 VA


24-110 V AC/DC 88-264 V AC/DC

ime current curves selectable accordingto IEC/IEEE standards

0 0-10 C to 55 C<1.5Kg


RatingOther Features

Burden on CTBurden on PTBurden on Aux. SupplyOperating TempWeightOutput ContactsConstructionDimPanel Cutout

Aux. Supply Type 1 Type 2

• •

3 Phase O/C & E/F relay with Highset + Auto Reclosure (Optional)3 Phase Directional O/C & E/F relay with Highset

Salient Features

RS485 Port for serial communication with “MSCOM” user friendly software

• Display of various parameters, trip count & trip data on LCD screen


• Built in self supervision & self testing feature

• Wave form capturing •

• Front RS232 Port for local programming

Feeder Protection Relays


Wiring Diagrams

MC20

20

MC30

1/5A

1/5A

1/5A

1/5A

4

5

6

7

8

9

In=

F50

F51

F50N

F51N

PROGR.INT.FAULT

R1

R2

R3

R4

R1

R2

R3

R4

D3

D2

D1

RS232KEYBOARD TASTIERA

10

11

BPMC

16

18

1714

15

13

12

2021

1922

OUTPUTRELAYS

RELEDI USCITA

DIGITALINPUTS

INCRESSIDIGITAL

321

RS485

MS-SCE1895-R2Standard Output

MS -SCE1924-R2I/O Output

DIGITALINPUTINGRESSDIGITAL

TO I/0 RELAYEXPANSIONALL ESPANSIONEDI I/0COMUNECOMUNE

RS485

R1

R2

R3

D3

D2

D1

OUTPUTRELAYS

RELEDI USCITA

CA (S+)B (S-)

LH

C

A (S+)B (S-)

16

18

1714

15

20

19

21

22

1312

3

21

AUXILIARY SUPPLY

5A1A

DISPLAY

MICROP.

MC30FUNZION

FUNCTIONS

BT 2

MS - SCE 1828 - R1

1/5A

1/5A

1/5A

6

7

4

5

8

9

6

7

4

5

8

9

In = □ 1A □ 5A

lon = □ 1A □ 5A

Auxiliary SupplyAlimentazione Ausiliaria

10

11

BPMC

KEYBOARDTASTIERA

RS232

PROGR.

INT.FAULTR4

R3

R2

R1F50

F51

F50N

F51N

FUNZIONIFUNCTIONS

MC20

MICROP.

DISPLAY

R4

R3

R2

R1

D1

D2

D3

16

18

17

14

15

13

12

20

21

19

22

321

RS485

DIGITALINPUTS

INGRESSIDIGITALI

RELE’DI USCITA

OUTPUTRELAYS

R3

R2

R1 16

18

17

14

15

RELE’DI USCITA

OUTPUTRELAYS

20

21

19

22

1312

3

21

DIGITALINPUTS

INGRESSIDIGITALI

RS485

COMUNECOMUNE

TO I/0 RELAYEXPANSIONALL’ ESPANSIONEDI I/0

MS - SCE 1828 - R1Standard Output

MS - SCE 1839 - R2I/O Output

D3

D1

D2

HL

C

A (S+)

B (S-)

C

A (S+)

B (S+)

50

A B C A B C

21

Model FMR



Burden on CTBurden on PTBurden on Aux. SupplyOperating TempWeightBurden on Aux.Output ContactsConstructionDimPanel Cutout

Aux. Supply Type 1 Type 2

Feeder Manager Relay246, 49, 50/51, 67, 50N/51N, 67N, 27/59, 59UO, 74, 81, 86, 121, I t

NumericThree levels for phase over current independentlyprogrammable as directional or non directionalThree levels for Earth Fault independently programmableas directional or non directionalThermal imageSelectable Time current curves according to IEC and IEEE standardsTwo over/under voltage levelsTwo over/under frequency levelsZero sequence over voltage levelTwo Negative Sequence current levelsOne Positive Sequence over voltage levelOne Negative Sequence undervoltage levelTrip circuit supervisionAssociated Circuit Breaker controlBreaker failure protectionBreaker interruption energy1 A or 5 A site selectable / 100-125 V PTIGraphical display 128 x 64 dotsDisplay of V, I, PF, kW, kVA, kVAr and thermal statusModbus RTU / IEC870-5 Communication ProtocolsRS232 serial communication port on front faceMIMIC diagram on LCDOscillographic recording of input quantitiesRS485 serial communication port on Back PanelPhase 0.01 VA at In = 1 A; 0.2 VA at In = 5 A Neutral0.01 VA at In = 1A; 0.2 VA at In = 5 A0.1 VA at UN


20-110 V AC/DC or 88-264 V AC/DC

0 0-10 C to 55 C<2Kg<10 VA

3 Phase Directional O/C & E/F relay with Highset 3 Phase voltage and frequency relay with vector shift

• •

FMR - Salient Features :-

RS485 Port for serial communication with “MSCOM” user friendly software

• Display of various parameters, trip count & trip data on LCD screen


• Built in self supervision & self testing feature

• Wave form capturing •

• Front RS232 Port for local programming

Feeder Protection Relays / Vector Shift Relay

3 Phase V and F relay with vector shift24, 27d/59d, 47, 59, 59Uo, 78, 81

0C

NumericOver FluxingTwo Levels of under / over voltageTwo Levels of under / over frequency.Zero seq. voltageVoltage unbalanceVector shift detection

Display of ParametersBuilt in Self supervisionRS485 Port

NA0.2 VA / Phase at UN8.5 VA

010 to 60 C< 2kg3 C/O+(1 N/O + 1 N/C)+separate relay1 C/O for self supervisionDraw out121 x 158 x 224113 x 142

20-110 V AC / DC or88-264 V AC / DC

UM30A


FMR

A B C A B C2

3

4

5

6

7

8

9

41

4243

44

45

46

47

48

2

3

4

5

6

7

8

9

41

4243

44

45

46

47

48

ULTRA

Feeder

Manager

Relay

POWER

TRIP

ON

OFF

11

21

R1

R2

R3

R4

R5

R6

R1

R2

R3

R4

R5

R6

D1

D2

D3

D4

+-

HL

ON

2528

15

25

14

2435

34

33

32

15

2231

12

25

15

25

19

38

2717

16

3437

In = □ 1A □ 5A lon = □ 1A □ 5A

MS - SCE 1844-R3

Auxiliary SupplyAlimentazione Ausiliaria

Un = 230Vac MAX.

BPUFRONT-RS252

DIGITALINPUTS

INGRESSIDIGITALI

N.C

N.O

(25)

TripOxi. sup.

Wiring Diagrams

22

UM30A

A

B

C

EA

UC UA

UBEBEC

13

12

44

3041

293928

27

26

25

IEC 255

24(-20%) - 110(+20%)Vac 24(-20%) - 125(+20%)Vdc 80(-20%) - 220(+20%)Vac 90(-20%) - 250(+20%)Vdc

_

˜˜

˜ =

Uo ˜̃̃BT 2 50

DISPLAY

MICROP.

FUNCTION

F27 / 59

F27d / 59d

F59sF59U

F81

F59 / 81

PROGR.

INT. FAULT

KEYBOARD

R1

R2

R3

R4

R4

R3

R5

R5

R1

R2

2110

112279

81820

1946

51517

161432134/382324

(21)

N.O.

N.O.

N.C.

N.C.

(10)

14BI<BI>

CS-S+

9 PIN MALE

UM30A

L/+

N/-

Salient Features

• Display of various parameters, event count & event data on 8 digit alphanumeric display







Other Features

Burden on CTBurden on PTOperating tempWeightBurden on Auxiliary supplyOutput ContactsConstructionDim W x H x D in mmPanel Cutout


Power management

0 0

81, 27, 59, 32P, 32QNumericFrequence 2 stages,Voltage 2 stage,Power factor 2 stage,Active power 2 stage,Capacitor reactive power 2 stage. Actual measurement of Freq,V, I, PF, active power, reactive power

Display of parametersMD recording & data loggingRS485 Port, Event recording

O.2 VA for 5 A, 0.01 VA for 1 A0.04 VA10 C to 60 C< 2kg8.5 VA max5 C/ODraw out 121 x 158 x 224113 x 142

20-110 V AC / DC88-264 V AC / DC

23

Control & Supervision Relays

Model MW33 SPM21

Auto Synchronising Relay25, 27NumericAuto Synchronising withAdjustable Voltage,Adjustable Frequency,Adjustable Phase angleAdjustable Reclose time,Bus Live / Dead operation,Speed Regular Control,Voltage Regulator Control,Digital inputs to monitorCB position110V - 125 V PT inputDisplay of Parameters,Built in self supervision,RS485 PortNA0.04 VA10 to 60< 2kg8.5 VA5 C/ODraw out121 x 158 x 224113 x 142

20-110 V AC / DC or88-264 V AC / DC

0 0C C

RRS

Generator load sharing95StaticActive / reactive powerOver powerLoad sharingFrequency control

110 V PT input1 A / 5 A CT input

NA< 5 VA10 C to 60 C<1.5kg8.5 VA3 N/ODraw out71 x 158 x 22462 x 142

20-110 V AC / DC or 88-264 V AC / DCUpto 380 V AC1 A / 5 A

0 0

• •

Power Management Relay Multifunction 3 Phase Measuring Instrument


24

Wiring Diagrams

G

1 T

OPTO OPTO

VOIOCOS

Lood Shedding

SE

TT

ING

S

MEDIAAVERAGE

Operation

To other RRS Relays

INCREASE

DECREASE

OVER POWER

Freq. control

Open

OpenOpenOpen Open

OpenOpen

Open

Lood Shedding

YesYesYesYes

Open Yes

Close No

Freq. control

11

1

10

2 3 32

22 21

3

4

7

6

8

9

R1

R2

R3

15

12

13

1

2

17

18

14

(.) (.)

- -

+

+

+

+

-

-

-+

RRS

SPM21

DISPLAY

MICROP.

SPM21

FUNCTION

F25SXR1

R2

R3

R4

R5

PROGR.INT. FAULT

9 PIN MALE

CS-S+

2110

1122

9

8

1820

19

46

1517

16

143

21

34/382324KEYBORD

R5

R4

R3

R2

R1

F+

F-

U+

U-

5

7

BX

BR

SX

B.I.BR

52 (N.O.)

U

52 C

SPM21

UG

UB

G1

52

UB

L/+

N/-

12

13

44

41

30

29

26

25

UG

U

F

F

IEC 255

MW33

L/+

L/-

1/5A

1/5A

1/5A

25

26

27

283929

4130

3243

3142

33

Un

Un

44

12

13In = 5A In = 1A Un = 100V

_

=˜ ˜˜

KEYBOARDTASTIERA

PROGR.INT.FAULT

R5

DISPLAY

MICROP.

MW33FUNZIONIFINCTION

F32 W

F32 VAR

WhVARh

R1R2

R3R4

R5

R4

R3

R2

R1

14

3

2

CS-S+

9 PIN MALE

242334/38

12

3

1416

17155

641920188

9722111021 (21)

N.O.

N.C.

(10)

N.O.

N.C.

IEC 255

Voltage and Frequency Relays

Description



Burden on CTBurden on PTOperating tempWeightBurden onA uxiliaryOutput Contacts

ConstructionDim W x H x D in mmPanel Cutout

Auxiliary Supply

25

Model UFD34 MC1V MC3V

• •

3 Phase Volt ge and frequency relay with df/dt & dv/dt 1 Phase Voltage and frequency relay

a

3 Ph Volt ge and Frequency Relay81, 27, 59, df/dt, dv/dtNumericSelectable 4 stages of frequency as Under/Over frequencySelectable 2 stages of voltage as Under/Over voltageSelectable 2 stages of df/dtSelectable 1 stages of de/dtBlocking Output and Blocking InputTime tagged multiple event recording

100-125 VDisplay of parametersBuilt in self supervisionOscillogarphic recording of input quantitiesRS485 serial communication port on Back Panel

Not Applicable0.04 VA

0 0-10 C to 60 C<2.5Kg8.5 VA4 C/O Contacts + 1 C/O for Self supervisionDrawout121 x 164 x 224113 x 142

20-110 V AC/DC or88-264 V AC/DC

a Single phase Volt ge and Frequency Relay27, 59, 81NumericTwo Under Voltage elementsTwo Over Voltage elementsOne UnderFrequency elementOne OverFrequency elementBlocking Output and Blocking InputTime tagged multiple event recordingOscillogarphic wave form captureDisplay LCD 16 (2 x 8) characters

100-125 VDisplay of parametersBuilt inSelf supervisionModbus RTU / IEC870-5-103 Communication ProtocolsFront RS232 Port for Local ProgrammingOscillogarphic recording of input quantitiesRS485 serial comunication port on Back Panel0.1 VA for 1 A, 0.3 VA for 5 ANA

0 0-10 C to 55 C<1.5Kg<7 VA4 C/O Contacts + 1 C/O for Self supervisionDrawout83 x 164 x 22464 x 137

20-110 V AC/DC or88-264 V AC/DC

a 3 Ph Volt ge and Frequency Relay27, 59, 47, 59 V 0, 81NumericTwo Under Voltage elementsTwo Over Voltage elementsOne Under Frequency elementOne Over Frequency elementOne Zero Sequence Over Voltage ElementOne Negative Sequence Under Voltage ElementOne Positive Sequence Over Voltage ElementOscillographic wave form captureModbus RTU / IEC870-5-103Communication ProtocolsDisplay LCD 16 (2 x 8) characters

100-125 VDisplay of parametersBuilt in self supervisionModbus RTU / IEC870-5-103 Communication ProtocolsFront RS232 Port for Local ProgrammingOscillogarphic recording of input quantitiesRS485 serial communication port on Back Panel0.1 VA for 1 A, 0.3 VA for 5 ANA

0 0-10 C to 55 C<1.5Kg<7 VA4 C/O Contacts + 1 C/O for Self supervisionDrawout83 x 164 x 22464 x 137

20-110 V AC/DC or88-264 V AC/DC

a

Salient Features

•

•

•

•

•

Display of various parameters, tripcount & trip data on LCD screen

Separate LEDs for individual fault indication

Built in self supervision & self testing feature

RS485 port for serial communication with “MSCOM” software

Easy operation by push buttons


UFD34

L/+

N/-

UFD34

Wiring Diagrams

A

B

C

25

26

27

283929

4130

12

13IEC 255

_

˜˜

˜=

KEYBOARD

PROGR.

INT. FAULTR5

R4

R3

R5

R4

R3

R2

R1

R2

R1DISPLAY

MICROP.

FUNCTION

F81 - 1

F81 - 2

F81 - 3

F81 - 4

Fdf / dt

F27 / 59

14

BI<

BI>

CS-S+

9 PIN MALE

242334/3812

31416

17155

6419

20188

972211

1021

(21)

N.O.

N.C.

(10)

N.O.

N.C.

26

BPMC

KEYBOARDTASTIERA

RS232

PROGR.

INT.FAULT R4

R3

R2

R11F27

FUNZIONIFUNCTIONS

MC1V

MICROP.

DISPLAY

R4

R3

R2

R1

D1

D2

D3

16

18

17

14

15

13

12

20

21

19

22

321

DIGITALINPUTS

INGRESSIDIGITALI

RELE’DI USCITA

OUTPUTRELAYS

C

A (S+)

B (S-)

R3

R2

R1 16

18

17

14

15

RELE’DI USCITA

OUTPUTRELAYS

20

21

19

22

1312

3

21

DIGITALINPUTS

INGRESSIDIGITALI

RS485

COMUNECOMUNE

TO I/0 RELAYEXPANSIONALL ESPANSIONEDI I/0

D3

D1

D2

HL

C

A (S+)

B (S-)

RS485

2F27

1F59

2F59

Auxiliary Supply

Alimentazione Ausiliaria

MS - SCE 1836 - R2



4

5

10

11

MC1V

BPMC

KEYBOARDTASTIERA

RS232

PROGR.

INT.FAULT

R4

R3

R2

R1F24

F27

F47

F59

F27d

F59d

FUNZIONIFUNCTIONS

MC3V

MICROP.

DISPLAY

R4

R3

R2

R1

D1

D2

D3

16

18

17

14

15

13

12

20

21

19

22

321

DIGITALINPUTS

INGRESSIDIGITALI

RELE’DI USCITA

OUTPUTRELAYS

C

A (S+)

B (S-)RS485

R5

R3

R2

R1 16

18

17

14

15

RELE’DI USCITA

OUTPUTRELAYS

20

21

19

22

1312

3

21

DIGITALINPUTS

INGRESSIDIGITALI

RS485

COMUNECOMUNE

TO I/0 RELAYEXPANSIONALL ESPANSIONEDI I/0

D3

D1

D2

H

L

C

A (S+)

B (S-)

4

5

6

7

8

9

A

B

C

EA

UAUC

UBEBEC

10

11

Auxiliary Supply

Alimentazione Ausiliaria

MS - SCE 1834 - R1



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