Digital Protective Relays
Larsen & Toubro
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.
Mysore Works
Training Centres
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 regularly
conducted at above training centres.
Lucknow
Pune
Coonoor
Contents
Pages
ANSI / IEEE Device Function Number Details
1
Time - Current Characteristics
2
Over Current Relays & Earth fault Relays - MC31A, MC61A, MC61C
3
Current Sensing Relays - MC12, ME12, SC14S
5
Neutral Displacement Relay - MND11
Reverse Power Relay - MRP11
Voltage Relay - MV12
7
Secondary Relays - TCS01, PTF03
9
Power Factor Control Relays - RPM14, RPM08
11
Motor Protection Relays - MM30, MM30W, MPR300, N-DIN-MA
13
Generator Protection Relays - MG30, MG30I, MD32G
15
Transformer Protection Relays - IM30T, MD32T, MD32TM
17
Feeder Protection Relays - MC20, MC30, FMR
Vector Surge Protection Relay - UM30A
19
Control & Supervision Relays - MW33
Synchronising Load Sharing Relays - SPM21, RRS
23
Voltage and Frequency Relays - MC1V, MC3V, UFD34
25
ANSI/IEEE
Correlation between ANSI/IEEE device Function number and Relays
Device
No.
Function
Name
21
25
Under impedance relay / Distance relay
Auto Synchronising
Synchro-check relay
AC under voltage relay
L&T
Relays
MS
Relays
MG30 / MG30-I
SPM21
SCM21
MV12
27
UM30-A / MC1V / MC3V
UFD34
MRP11
Power directional relay
32
MG30 / MW33 / MG30-I
Under current or under power relay
37
MM30
MW33
Field control (loss of field) relay
40
MG30 / MG30-I
DC over voltage relay
45
UBC / 45
Reverse phase or phase balance current relay
46
IM30T
MM30
Phase-sequence or single-phasing voltage relay
47
UM30-A, MC3V
Machine or transformer thermal relay
49
IM30T
MG30 / MG30-I
MM30 / MM30-W
Instantaneous over current (or rate-of-rise) relay
50
MC20 / MC30
ME12
IM30-T / IM30-AP
MC12A
FMR
MC61A / MC61C MG30 / MG30-I
51V, 50V Voltage restrained over current relay
MG30 / MG30-I
Breaker - failure
50BF
MC20 / MC30 / FMR / IM30T / IM30AP
MC12A
Instanteneous earth fault over current relay
50N
IM30 AP / IM30-T
MC61A
MC20 / MC30
MC61C
FMR / IM30-T
MC12A
AC time over current relay
51
IM30 - AP / IM30-T
MC61A
MC20 / MC30
MC31A
FMR / IM30-T
MC61C
-MC12A
51N-(51G) Ground fault time over current relay
IM30 - AP / IM30-T
MC61A
MC20 / MC30
MC31A
FMR
MC61C
-–
Rectifier failure relay (rotating diodes)
58
RHS
MV12
AC over voltage relay
59
--UFD34, MW33
-Overexcitation relay V/Hz
59/81
UM30-A / MG30 / MG30-I
Voltage balance relay
60
UM30-A
Ground detector (insulation to ground failure of machine or other apparatus) MG30
64
-Machine stator ground fault detector relay
64S
MG30
-Machine rotor ground fault detector relay
64R
UBO / CR
-AC directional over current relay
67
FMR
-67N-(67G) Directional ground fault over current relay
FMR
–
DC over current relay
76
–
–
Phase angle measuring or out of-step protection relay
78
IM30-GOS
-Reclosing relay
79
MC20R
-DC under voltage relay
80
UBC / 80
–
Frequency relay
81
UM30-ASV / MG30
-UFD34 / MC1V / MC3V / MW33
-Lock-out relay
86
-SC14S
Differential protective relay
87
MD32G
-MD32T / MD32TM
–
87N-(87G) Ground fault differential protective relay
MD32G, MD32T
–
Regulating device to adjust a quantity
90
-–
Automatic active or reactive load sharing relay
95
RRS
Vector surge protection relay
UM30-A
–
Rate of change of frequency
df/dt
UFD34
1
Time - Current Characteristics
Product design standards
Reference standards
IEC 60255, IEC 61000,
IS3231, IS8686
Dielectric test
Impulse test
HF disturbance test
Electrostatic discharge test
Electrical fast transient
Radiated electro magnetic field test
Surge immunity
Ring wave test
Voltage dips & interruption test
Power frequency magnetic test
: IS 3231 / IEC 60255-5
: IS 8686 / IEC 60255- 5
: IS 8686 / IEC 60255-22-1
: IEC 61000-4-2
: IEC 61000-4-4
: IEC 61000-4-3
: IEC 61000-4-5
: IEC 61000-4-12
: IEC 61000-4-11
: IEC 61000-4-8
Time - Current Characteristics (At TMS = 1)
1,000
Trip Time (Sec.)
100
10
A
1
B
C
D
01
1
10
20
Multiple of set current (Is)
For Trip time at TMS other than 1
Trip time = (Trip time at TMS = 1) x TMS OR
50msec whichever is more
A : Normal Inverse 3.0 Sec.
B : Normal Inverse 1.3 Sec.
C : Very Inverse
D : Extreme Inverse
2
Over Current and Earth Fault Relays
• Three Phase Over Current &
Earth fault Relays
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
Model
MC31A
MC61A
Description
3 Phase O/C + E/F
3 Phase O/C + E/F + Highset
Device Code
Design
Functions Available
51 RYBN
Numerical Relay
Lowset O/C
-Is
Lowset E/F
-Os
Settings
O/C Is = 20-200% Step 5%
E/F Os = 5-80% Step 5%
Time Characteristics available NI, VI, EI, Definite Time
TMS 0.1 - 1.6 Step 0.05
Other Features
Site selectable Trip time Char.
Display of Currents, Trip count
Self supervision feature
Burden on CT
Burden on PT
Operating temp
Weight
Burden on Auxiliary supply
Output Contact
Construction
Dim W x H x D in mm
Panel Cut Out
≤
0.25 VA on CT/Phase
Not applicable
0 0C to 600C
< 2kg
≤
10 VA
1 N/O Contact for self suprvn
Draw out
121 x 158 x 224
113 x 142
Auxiliary supply Type 1
Type 2
CT rating
20-110 V AC / DC or
88-264 V AC / DC
1 A or 5 A
(site selectable)
4 NO or 2 NO + 2 NC
MC61C
3 Phase O/C + E/F + Highset
Communication and breaker control
50/51 RYBN
50/51 RYBN
Numerical Relay
Numerical Relay
Lowset O/C
-Is
Lowset O/C
-Is
Highset O/C
-Ihs
Highset O/C
-Ihs
Lowset E/F
-Os
Lowset E/F
-Os
Highset E/F
-Ohs
Highset E/F
-Ohs
O/C Is = 20-200% Step 5%
O/C Is = 20-200% Step 5%
E/F Os = 5-80% Step 5%
E/F Os = 5-80% Step 5%
HS O/C = (0.2 to 40) x In step of - HS O/C = (0.2 to 40) x In step of 0.2 In or disable
0.2 In or disable
HS E/F = (0.1 to 20) x On step of - HS E/F = (0.1 to 20) x On step of 0.1 On or disable
0.1 On or disable
Time Characteristics available Time Characteristics available NI, VI, EI, Definite Time
NI, VI, EI, Definite Time
TMS : 0.1 - 1.6 Step 0.05
TMS : 0.1 - 1.6 Step 0.05
HS delay:0.1-2 Sec step 0.01 Site selectable Trip time Char.
Sec. or Inst.
RS485 Communication
Highset can be disabled
Display of Currents, Trip count
Breaker control
Self supervision feature
Auto doubling of highset, Relay co-ordination - BI & BO
≤
0.25 VA on CT/Phase
≤
0.25 VA on CT/Phase
Not applicable
Not applicable
00C to 600C
00C to 600C
< 2kg
< 2kg
≤
10 VA
≤
10 VA
1 N/O Contact for self suprvn
1 N/O Contact for self suprvn, 1N/O for trip
Draw out
Draw out
121 x 158 x 224
121 x 158 x 224
113 x 142
113 x 142
Ordering Information
Output Contacts
20-110 V AC / DC or
88-264 V AC / DC
1 A or 5 A
(site selectable)
4 NO or 2 NO + 2 NC
20-110 V AC / DC or
88-264 V AC / DC
1 A or 5 A
(not site selectable)
4 NO
3
Wiring Diagrams
MC31A
R
Y
B
1
R
Y
B
1
2
2
3
3
4
4
13
13
5
5
6
6
MICRO
CONTROLLER
N0
R1
9
MC31A
PROTECTION
10
NC
R2
11
12
F50(Is)
R3
F51(0s)
15
15
16
16
7
7
8
8
17
18
R4
27
R
Y
B
E
28
21
R5
22
In =
0n =
1A;
1A;
L/+
5A
5A
N/- 26
29
PROG.
ERROR
25
30
˜
MC61A
R
Y
B
R
Y
B
1
1
2
2
3
3
4
4
13
13
5
5
6
6
MICRO
CONTROLLER
R1
N0
9
MC61A
PROTECTION
10
NC
R2
11
12
F50(Is)
15
15
16
16
7
7
8
8
R3
F51(Os)
17
F50(Ihs)
18
F51(Ohs)
R4
27
R
Y
B
E
28
21
R5
22
In =
1A;
5A
0n =
1A;
5A
L/+
N/-
29
PROG
ERROR
25
30
26
MC61C
R
Y
B
R
Y
B
1
1
2
2
3
3
4
4
R1
10
R2
13
5
5
6
6
F51(Os)
15
15
F50(Ihs)
16
16
F51(Ohs)
7
7
F50(Is)
12
R3
17
R4
R
Y
B
E
D2
D3
In =
0n =
1A ;
1A ;
5A
5A
L/+
PROG
ERROR
25
N/- 26
˜
C
SS+
9 PIN MALE
4
18
OPEN
27
BKR
28
CLOSE
29
21
22
NC
BKR
R5
D1
8
NO
11
MC61C
PROTECTION
13
8
9
MICRO
CONTROLLER
30
19 L/R
20 BI*
31
32
Current Sensing Relays
• Single Phase Over current / Earth fault Relay
• Sensitive E/F Relay / Instantaneous Current Relay
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
Model
MC12A
ME12A
SC14S
Description
Device Code
Design
Functions Available
1 Ph O/C or E/F
50/51 or 50N/51N
Microcontroller Based
Lowset O/C -Is
Highset O/C -Ihs
Lowset E/F -Os
Highset E/F -Is
O/C Is = 50-200% Step 10% OR
E/F Is = 10-40% Step 2% OR
E/F Is = 20-80% Step 4%
HS O/C = (2-16) xls step 2 Is
HS E/F = (2-16) xls step 2 Is
Time Characteristics availableNl, VI, EI, Definite Time
3 ranges of def Time (1, 10,100)
TMS : 0.1 - 1.6 Step 0.1
Site selectable Trip time Char.
Highset can be disabled
1 Ph Sensitive E/F
50N/51N
Microcontroller Based
Lowset S E/F -Is
Highset S E/F -Ihs.
Instantaneous current relay
87N/64R
Static
S E/F = 1-16% step 1%
HS S E/F = (2-16) xls
in steps of 2 ls
Is = 10-40% step 5%
OR 20-80% step 10%
Time Characteristics availableNI, VI, EI, Definite Time 3
ranges of def Time (1, 10, 100)
TMS : 0.1 - 1.6 Step 0.1
Site selectable Trip time Char.
Highset can be disabled
Harmonic rejection
≤0.25 VA on CT
Not applicable
00C to 600C
< 1.5kg
≤5.5 VA
2 C/O Contacts (S/R)
Draw out
71 x 158 x 224
62 x 142
Time Characteristics availableInstantaneous (25ms) OR
time delayed 100ms / 200ms
Self Powered
Relay testing possible by ext. 24 V Supply
Flag indication / LED indication
≤6 VA
Not Applicable
00C to 600C
< 1.5kg
Not Applicable
2 C/O Contacts (S/R)
Draw out
71 x 158 x 224
62 x 142
Settings
Other Features
Burden on CT
Burden on PT
Operating temp
Weight
Burden on Auxiliary supply
Output Contacts
Construction
Dim W x H x D in mm
Panel Cutout
≤0.25 VA on CT
Not applicable
00C - 600C
< 1.5kg
≤5.5 VA
2 C/O Contacts (S/R)
Draw out
71 x 158 x 224
62 x 142
Ordering Information
Auxiliary supply Type 1
Type 2
CT rating
Range Setting
20-110 V AC / DC or
88-264 V AC / DC
1 A or 5 A
10-40% or 20-80% or 50-200%
Site Selectable
20-110 V AC / DC or
88-264 V AC / DC
1 A or 5 A
Not Applicable
1 A or 5 A
10-40% or 20-80%
5
Wiring Diagrams
MC12A / ME12A
COM
1
2
+VE/PH.
Aux. Supply
3
-VE/N
R1
µP. Control
Ckt.
F50/50N
F51/51N
10
COM
11
12
MC12A / ME12
SETTING RANGE (Is)
AUX SUPPLY
24 - 110V AC/DC
95 - 240V AC/DC
In
1A
5A
ME12
(1-16)% In
MC12A
(10-40)% In
(20-80)% In
(50-200)% In
SC14S
11
2
10
˜
9
7
+
1
Control
Ckt.
R
3
5
DC-DC
Test (24V)
Voltage
Test
6
Convrt.
8
4
12
SC14S
In
1A
5A
6
CT OPERATED RELAY
NO AUXILIARY SUPPLY
REQUIRED
SETTING RANGE (Is)
(10-40)% IN
(20-80)% IN
Neutral Displacement Relay, Reverse Power Relay,
Under Voltage or Over Voltage Relay
Salient Features
• Easy setting through front panel
DIP switches
• LED indication for
Power ON and trip status
• Test feature - helps in better maintenance
• Compact, light weight helps in
reducing panel size & thickness
Model
MND11
Description
Device Code
Design
Functions Available
Neutral Displacement
59 Vo
Microcontroller Based
Voltage relay for E/F Protection
of generator earthed thro’
neutral earthing transformer
Settings
Fault voltage Vs 2% - 32% of Vn step 2%
Alarm voltage Vis 2% - 32% of Vn step 2%
Time Characteristics availableInverse time, Definite time
TMS : 0.1 - 1.6 Step 0.1
LED indication for power ON,
Other Features
time characteristics, trip
Test feature
Third harmonics rejection 26db
≤0.25 VA
Burden on PT
Not Applicable
Burden on CT
00C to 600C
Operating temp
< 1.5 kg
Weight
Burden on Auxiliary supply ≤7 VA
1 N/O +1C/O Contacts (S/R)
Output Contacts
Draw out
Construction
71 x 158 x 224
Dim W x H x D in mm
62 x 142
Panel Cutout
MRP11
MV12
Reverse Power
32
Microcontroller Based
Reverse Power Level
1 Ph U/V OR O/V
27 OR 59
Microcontroller Based
Lowset U/V
- Vs
Lowset O/V
- Vs
PT input Vn 110 V, 415 V AC
CT input In 1 A / 5 A
Pick up level 1% - 15%
Min. setting 0.5%
TMS 0 to 1.5 step 0.1
Definite time characteristics
U/V Vs = 95-20% step 5%
O/V Vs = 105-180% step 5%
Time Characteristics availableInverse time, Definite time
TMS : 0.1 - 1.6 Step 0.1
LED indication
Test feature
Site selectable U/V OR O/V
Site selectable Trip time Char.
< 0.25 VA
< 0.05 VA
00C to 600C
< 1.5 kg
< 8 VA
1 N/O + 1 C/O
Draw out
71 x 158 x 224
62 x 142
< 0.25 VA
≤0.075 VA on PT
00C to 600C
< 1.5 kg
≤8 VA
2 C/O Contacts (S/R)
Draw out
71 x 158 x 224
62 x 142
Ordering Information
Auxiliary supply Type 1
Type 2
CT Rating
PT Rating
20-110 V AC / DC
88-264 V AC / DC
Not Applicable
110 V AC
20-110 V AC / DC
88-264 V AC / DC
1A or 5 A
Upto 380 V AC
20-110 V AC / DC
88-264 V AC / DC
Not Applicable
110 V / 240 V / 415 V (site selectable)
7
Wiring Diagrams
MND11
1
6
R1
2
3
R Y B
7
L /+
4
5
µP.
Control
Ckt.
F64
Aux. Supply
N /-
9
R2
11
12
10
MND11
PT VOLTAGE : 110V AC
MRP11
1
R Y B
4
2
+ VE / PH.
3
Aux. Supply
– VE / N
5
R1
µP.
Control
Ckt.
F32
11
7
8
12
6
9
10
MRP11
Vn
110 V AC
415 V AC
In
AUX SUPPLY
24–110 V AC/DC
95–240 V AC/DC
1A
5A
MV12
1
5
2
4
3
+VE/PH.
Aux. Supply
4
-VE/N
R1
µP.Control
Ckt.
F27
F59
6
8
11
9
12
7
MV12
8
Secondary Relays
• Trip Circuit Supervision Relay
• PT Fuse Failure Relay
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 - in reducing
panel size & thickness
• Low power burden
Model
TCS 01
PTF 03
Description
Device Code
Design
Functions Available
Trip Circuit supervision
95 ABC
Static
Post Close Supervision
Pre Close Supervision
Not Applicable
Trip coil supply 110 - 220 V AC
OR 24 - 48 - 110 - 220 V DC
Operation time 500+/-100mS
Reset time < 150 mS
Same Relay for all Rating
Trip supply U/V indication
CB ON/OFF status indication
PT Fuse Failure Relay
60
Static
3 Phase PT fuse failure
Rating
Settings
Other Features
Burden on CT
Burden on PT
Operating temp
Weight
Burden on Auxiliary
Output Contacts
Construction
Dim W x H x D in mm
Panel Cutout
Not applicable
Not applicable
00C to 550C
< 1.5kg
≤10 VA
2 C/O Contacts (S/R)
Draw out
71 x 158 x 224
62 x 142
Ordering Information
Auxiliary supply Type 1
Type 2
20-110 V AC / DC or
80-264 V AC / DC
110 V AC PT
Not Applicable
Operation time ≤7mS
LED Indication for each
phase, Relay trip status
Self powered
High speed operation
Not Applicable
< 5 VA per phase on PT
00C to 550C
< 1.5kg
Not Applicable
2 C/O Contacts (S/R)
Draw out
71 x 158 x 224
62 x 142
9
Wiring Diagrams
TCS 01
L /+
1
TRIP COIL
SUPPLY
(20 - 264V
AC / DC
2
TRIP
RELAY
CONTACT
6
3
L /+
4
N/ -
5
Aux. Supply
13
7
15
9
12
BKR.
AUX.
CONT.
R1
10
TCS
CKT.
11
8
14
TCS 01
TC
Aux. Supply
N/ -
20-110V AC/DC
88-264V AC/DC
PTF 03
1
2
6
11
5
12
FUSE
R1
LOAD
R
FUSE
Y
LOAD
FROM PT
SEC. 110V
AC PH. -PH.
14
9
PTF
CKT.
10
15
B
LOAD
FUSE
N
10
7
13
8
16
17
PTF 03
Power Factor Control Monitoring Relays
• (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 statuslead / lag / unity
• Auto / Manual mode
• Measurement sensitivity of 1%
• Automatic C/K correction
• Display of cuttent, Voltage, KVAR,
& Capacitor values
Model
RPM-8
RPM-14
Description
Automatic Power Factor Controller
8 stage
Automatic Power Factor Controller
14 stage
Microcontroller Based
Automatic PF control upto
8 stage
Switching time 1-255 Sec.
in step of 1 sec for same
Bank switching
Auto C/K sellection
PF control range 1% to 120% of
rated current
Can accept unequal banks
Display of PF, V, l, KVAR
LED indications for faults
Alarm signal for CT reversal,
under current, Under compensation,
over compensation, over voltage,
1 A / 5 A field selectable
0.3 VA
≤15 VA
00C to 600C
< 2kg
8 N/O
1 N/O contact for alarm
144 x 144 x 100
138 x 138
Microcontroller Based
Automatic PF control upto
14 stage
Switching time 1-255 Sec.
in step of 1 sec for same
Bank switching
Auto C/K sellection
PF control range 1% to 120% of
rated current
Can accept unequal banks
Display of PF, V, l, KVAR
LED indications for faults
Alarm signal for CT reversal,
under current, Under compensation,
over compensation, over voltage,
1 A / 5 A field selectable
0.3 VA
≤15 VA
00C to 600C
< 2kg
14 N/O
1 N/O contact for alarm
144 x 144 x 100
138 x 138
Device Code
Design
Functions Available
Settings
Other Features
Burden on CT
Burden on PT
Operating temp
Weight
Output Contacts
Dim W x H x D in mm
Panel Cutout
Ordering Information
Auxiliary supply
240 V AC
240 V AC
11
Wiring Diagrams
RPM-8
Ph
230V AC
1
13
2
14
3
15
ALARM
4
5
6
S1(5A)
7
S1(1A)
8
S2
9
+
+
-
50 Hz
N
16
R8
17
R7
18
R6
19
R5
20
R4
21
10
R3
22
11
R2
23
12
R1
24
BANK #8
BANK #1
R
Y
TO
B
LOAD
N
RPM-14
1
2
3
4
5
6
7
8
9
10
11
12
R13 13
R14 14
15
- 16
+ 17
+ 18
19
20
21
22
23
24
240V AC
50 Hz
Ph
N
S2
S1(1A)
S1(5A)
ALARM
R1
R2
R3
R4
R5
R6
R7
R8
R9
R10
R11
R12
BANK #1
BANK #14
R
Y
B
N
12
TO
LOAD
Motor Protection Relay
• Motor Protection Relay
• Motor Protection Relay with Voltage input
• Lowcost 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
• Four user programmable
output relays
• 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
Model
MM30
Description
Device Code
Motor Protection
50/51, 51LR, 64, 68,
49, 46, 37, St no, ltr
Numeric
Trip circuit supervision
Thermal O/L and Pre-alarm
Locked Rotor
Current unbalance, phase reversal,
Phase loss
Over Current
Earth Fault
Repeat and prolonged starts
Restart Inhibition
No load running
Blocking Function
MM30W
Motor Protection
50/51, 51LR, 64, 49, 46, 37, St no,
ltr, 55, 68, 81, 47, 12/14, 27/59
Design
Numeric
Functions Available
Trip circuit supervision
Thermal O/L and Pre-alarm
Locked Rotor
Current unbalance, phase reversal,
phase loss
Over Current
Earth Fault
Repeat and prolonged starts
Restart Inhibition
No load running
Blocking Function
Under frequency / over frequency
Under voltage / over voltage
Running hours
Low PF
Auto setting
Auto setting
Other Features
1 A or 5 A site selectable
1 A or 5 A site selectable
(Default 5 AMP)
(Default 5 AMP)
Selectable motor time constant
Selectable motor time constant
(1 - 60 min)
(1 - 60 min)
Display of parameters
Display of parameters
Built in self supervision
Built in self supervision
RS485 port
RS485 port
0.2 VA for 5 A, 0.01 VA for 1 A
0.2 VA for 5 A, 0.01 VA for 1 A
Burden on CT
Not Applicable
Not Applicable
Burden on PT
0
0
10 C to 60 C
100C to 600C
Operating temp
Weight
< 2kg
< 2kg
Burden on Auxiliary
8.5 VA
8.5 VA
Output Contacts
4 C/O + 1 C/O for self supervision
4 C/O + 1 C/O for self supervision
Construction
Draw out
Draw out
Dim W x H x D in mm 121 x 158 x 224
121 x 158 x 224
113 x 142
113 x 142
Ordering Information
Auxiliary supply
20-110 V AC / DC or
88-264 V AC / DC
20-110 V AC / DC or
88-264 V AC / DC
N-DIN-MA
Motor Protection
49, 51LR, 46, 37, 50/51, 64, StNo, Itr
Numeric
Thermal O/L and Pre-alarm
Locked Rotor
Current unbalance, phase reversal,
phase loss
Over Current
Earth Fault
Repeat and prolonged starts
Restart Inhibition
No load running
Blocking Function
2 Programable digital inputs
1 Removable front face panel
LCD Display
1 A or 5 A site selectable (Default 5 AMP)
Selectable motor time constant (1 - 60 min)
Display of parameters
Built in self supervision
RS485 port, front RS232 port (on FFP)
0.075 VA for 5 A, 0.01 VA for 1 A
Not Applicable
100C to 600C
< 1kg
3 VA
2 C/O Contacts
DIN rail mounting
FFP = 106 x 45 x 16
RMB = 106 x 85 x 72
20-110 V AC / DC or
88-264 V AC / DC
13
Wiring Diagrams
MM30
A
B
C
A
B C
25
25
26
26
MICROP.
27
27
MM30
28
39
29
28
39
29
41
30
32
43
41
30
32
43
˜˜˜
31
31
In=5A
In=1A
42
42
33
33
PROGR.
INT. FAULT
44
11
22
7
9
R2
FUNCTION
F37
F46
F49
F51
F51R
F64
St.No.>
AI.0>
Itr
21
10
R1
DISPLAY
R1
R3
8
18
20
R4
19
4
6
R5
5
15
17
R2
R3
L/+
12
N/-
13
˜
˜=
˜
(10)
N.O.
N.C.
N.C.
16
14
R4
3
R5
2
1
34/38
23
24
C
SS+
KEYBOARD
PRESA/TAP 31:Ion=5A
PRESA/TAP 33:Ion=1A
(21)
N.O.
9 PIN MALE
IEC 255
N-DIN-M
N-DIN-M
A
B
C
A
B
C
A
10
B
C
10
FFP
Display /
10
Keyboard /
Signals
A B + 0
RS485
11
11
11
8
8
8
9
9
9
RMB
RS485
A B + 0
N - DIN - M
FUNCTIONS
F26
R1
16
F37
17
F46
12
12
12
13
13
13
F49
F51
BT 2
1
F51LR
F64
Digital Input
Digital Input
T
1
2
6
T
7
14
D2
PWR / I.R.F
Trip
ON
OFF
0
C 2
THERMISTOR INPUT
RTD
1
COMMON
15
R2
St.Ctrl
D1
B (S-)
RS485
A (S+)
4
5
21
22
MS - SCE 1752 - R1
MPR300
R
Y
B
N
Aux. N/O
Start
N/O
Stop
(N/C)
1
2
NC
3
4
5
NO
MPR300
M
14
Typical connection diagram
for 'Direct Starting' application
6
7
8
Aux.
Supply
Protections offered by MPR300
l
Thermal overload
Single Phasing (Phase Failure)
l
l
Earth Fault
l
Locked Rotor
l
Phase Sequence reversal
l
Current Unbalance
l
Under Current
Current Settings
l
MPR300 is available in 6 different
models
l
1A to 2.75A; 2A to 5.5A; 4A to 11A;
8A to 22A; 16A to 44A; 32A to 88A
Auxiliary Supply
l
240 V AC
l
110 V AC
Generator Protection Relays
• Multifunction Generator Protection Relays
• Percentage Based Generator Differential Relay
Salient Features
• Display of various parameters,
trip count & trip data on 8 digit
alphanumeric display
• Separate LEDs for
various fault indication
• Four user programmable
output relays
• Built in self supervision &
self testing feature help maintenance
• Easy operation by 5 push buttons
• RS485 Port for
serial communication with “MSCOM”
user friendly software
Model
MG30
MG30-I
Description
Device Code
Generator Protection
Generator Protection
21, 24, 27/59, 32, 37, 40, 46, 49, 50/27,
21, 24, 27/59, 32, 37, 40, 46, 49, 50/27,
50V/51V, 51BF, 60FL, 64S, 68, 81
50V/51V, 51BF, 60FL, 64S, 68, 81
Design
Numeric
Numeric
Functions Available
Two levels of voltage controlled O/C,
Two levels of voltage controlled O/C,
Thermal Image with pre-alarm,
Thermal Image with pre-alarm,
Two levels of current unbalance
Two levels of current unbalance
Two levels of under / over voltage
Two levels of under / over voltage
Two levels of under / over frequency
Two levels of under / over frequency
95% + 100% Stator Earth fault,
95% stator Earth fault
Two levels of Over excitation
Two levels of Over excitation
Two levels of Under impedance,
Two levels of Under impedance,
Loss of Field, Under Power
Loss of Field, Under Power
PT Fuse Failure, Breaker Failure,
PT Fuse Failure, Breaker Failure,
Inadvertent C/B Closure etc.
Inadvertent C/B Closure etc.
Other Features
1 A or 5 A site selectable
1 A or 5 A site selectable
Display of Parameters
Display of Parameters
Built in Self supervision
Built in Self supervision
RS485 Port, MODBUS protocol.
RS485 Port, MODBUS protocol.
Blocking inputs & Blocking outputs
Blocking inputs & Blocking outputs
Burden on CT
0.25 VA for 5 Amp CT
0.25 VA for 5 Amp CT
0.01 VA for 1 Amp CT
0.01 VA for 1 Amp CT
Burden on PT
0.05 VA (MG30)
0.05 VA (MG30)
Burden on Auxiliary supply 8.5 VA
8.5 VA
0
0
Operating temp
10 C to 60 C
100C to 600C
Weight
< 2kg
< 2kg
Output Contacts
3 C/O+(1 N/O + N/C)+separate relay
3 C/O+(1 N/O + N/C)+separate relay
1 C/O for self supervision
1 C/O for self supervision
Construction
Draw out
Draw out
Dim W x H x D in mm
121 x 158 x 224
121 x 158 x 224
Panel Cutout
113 x 142
113 x 142
Ordering Information
Auxiliary supply Type 1
Type 2
20-110 V AC / DC or
88-264 V AC / DC
20-110 V AC / DC or
88-264 V AC / DC
MD32-G
Generator Differential
87, 50/51, 64S/87N, 68
Numeric
Generator Differential
Bias % with dual adjustable slope
Over Current
Stator E/F
CB Failure protection
1 A or 5 A site selectable
Display of Parameters
Wave form capture feature
Built in Self supervision, RS485 Port
0.2 VA for 5 A, 0.01 VA for 1 A
Not Applicable
8.5 VA
-100C to 600C
< 2kg
4 C/O, S/R or H/R or Time del
1 C/O for self supervision
Draw out
121 x 158 x 224
113 x 142
20-110 V AC / DC or
88-264 V AC / DC
15
Wiring Diagrams
MG30
25
DISPLAY
21
10
R1
1/5A
MICROP.
26
MG30
1/5A
27
R2
7
9
R3
8
18
20
R4
19
4
6
R5
5
15
17
FUNZIONI
FUNCTION
1/5A
28
39
29
G
11
22
1>,Z<,Uo>
1/5A
30
41
12>,T>
R1
Zc<,O>
R2
U,f
1/5A
W<, Ir>
31
42
32
43
33
MG30
PROGR.
R5
INT. FAULT
1/5A
44
KEYB0ARD
TASTIERA
13
N.O. N.C.
37(b)
TO REX
38(a) RELAY
EXPANSION
23
24
C
S–
S+
12
(10 – 11)
14
3
2
1
14
3
2
R4
B.I./B.F.
N.O. N.C.
16
R3
IC, 60FL
1/5A
(21 – 22)
9 PIN MALE
CE
MS-SCE 1629-R0
In=1A
In=5A
Un=100V
MG30-I
25
DISPLAY
26
MG30-I
27
11
22
7
9
8
18
20
19
4
6
5
15
17
18
R2
FUNZIONI
FUNCTION
R3
28
39
29
G
21
10
R1
MICROP.
I>, Z<, Io>
1/5A
30
41
I2>, T>
R1
Zc<,
R2
>
R5
U, 1
1/5A
w<+ Ir>
31
42
32
43
R4
IC, 60FL
B.I / B.F.
1/5A
R3
3
2
PROGR.
INT.FAULT
1/5A
33
37(b)
R5
c
ss+
KEYBOARD
TASTIERA
12
In =
1A
In =
5A
13
N.O. N.C.
14
3
2
1
14
R4
(21 - 22)
N.O. N.C.
(10 - 11)
38(0)
23
24
TO REX
RELAY
EXPANSION
RS485
MS-SCE1759-R0
MD32-G
A
B
87G + 87N
C
I1A
25
26
I1C
21
10
R1
DISPLAY
1/5A
I1B
11
22
7
9
MICROP.
1/5A
MD32-G
27
1/5A
28
39
FUNCTION
R2
R3
8
18
20
R4
19
4
6
R5
5
15
17
G
F187G
F287G
F87N
29
R4
30
41
I2B
R = Stabilising resistor
Z = Protection surge
arrester (if required)
I2C
B3
Z
16
1/5A
33
L/+ 12
N/- 13
PROGR.
INT. FAULT
1/5A
˜˜˜
50-60
_
˜
˜
˜=
R5
KEYBOARD
N.C.
(10)
N.O.
N.C.
16
14
1/5A
31
42
32
43
R
R2
R3
1/5A
I2A
R1
(21)
N.O.
3
B2
B1
C
SS+
9 PIN MALE
2
1
34/38
23
24
Transformer Protection Relay
• Percentage Based Transformer Differential Relay
• 3 Phase Thermal + Over Current + Earth Fault Relay
for transformer protection
Salient Features
• Display of various parameters,
trip count & trip data on 8 digit
alphanumeric display
• Separate LEDs for
individual fault indication
• Four user programmable
output relays
• Built in self supervision &
self testing feature help maintenance
• Easy operation by 5 push buttons
• RS485 Port for
serial communication with “MSCOM”
user friendly software
Model
MD32T
MD32TM
IM30T
Description
Transformer Differential +
Restricted E/F
87 RYB, 87N
Transformer Differential
3 Ph O/C, E/F + Thermal
87 RYB
20-110 V AC / DC
88-264 V AC / DC
20-110 V AC / DC
88-264 V AC / DC
Device Code
Design
Functions Available
Other Features
Burden on CT
Operating temp
Weight
Burden on Auxiliary supply
Output Contacts
Construction
Dim W x H x D in mm
Panel Cutout
Auxiliary Supply
50/51 RYBN, 49, 46, I2t, 51BF,
50N/51N
Numeric
Numeric
Numeric
Lowset Differential
Lowset Differential
Lowset O/C
Lowset Op time : <=30mS
Lowset Op time : <=30mS
Highset O/C
Highset Differential
Highset Differential
Lowset E/F
Highset Op time : 6-20mS
Highset Op time : 6-20mS
Highset E/F
Restricted Earth Fault
Dual slope Bias
Thermal Overload
Dual slope Bias
Highset can be Biased / Unbiased Lowset current unbalance with
Highset can be Biased / Unbiased 2nd harmonic restraint setting
Definite / Inverse time tripping
2nd harmonic restraint setting
5th harmonic restraint setting
Highset current unbalance
5th harmonic restraint setting
Auto correction of CT Ratio
Inrush Energy protection
Auto correction of CT Ratio
Zero sequence compensation
CB Failure function
Zero sequence compensation
Blocking Function
Blocking function
Blocking Function
Display of parameters
Display of parameters
Display of Parameters
Built in self supervision
Built in self supervision
Built in self supervision
RS485 Port
RS485 Port
RS485 Port
1 A OR 5 A site selectable
1 A OR 5 A site selectable
1 A OR 5 A site selectable
Waveform capture feature
Waveform capture feature
0.2 VA for 5 A, 0.01 VA for 1 A
0.2 VA for 5 A, 0.01 VA for 1 A
0.2 VA for 5 A, 0.01 VA for 1 A
100C to 600C
100C to 600C
100C to 600C
< 2kg
< 2kg
< 2kg
8.5 VA
8.5 VA
8.5 VA
5 C/O, S/R or H/R or Time del
5 C/O, S/R or H/R or Time del
5 C/O, S/R or H/R or Time del
Draw out
Draw out
Draw out
121 x 158 x 224
121 x 158 x 224
121 x 158 x 224
113 x 142
113 x 142
113 x 142
Ordering Information
20-110 V AC / DC
88-264 V AC / DC
17
Wiring Diagrams
MD32T / MD32TM
A
B C
I1A
87T + 87N
25
In1
26
I1C
MD32T
27
V2
á
V1
V2
1/5A
28
39
Kv =
R3
F187T
F287T
F87N
29
R1
R2
R3
1/5A
I2A
R = Stabilising resistor
Z = Protection surge
arrester (if required)
R4
30
41
I2B
I2C
19 N.C.
4
6
R5
5
15
17
16
14
3
B3
PROGR. R5
INT. FAULT
1/5A
Z
˜˜˜
1/5A
33
50-60
L/+ 12
IEC 255
R4
1/5A
31
42
32
43
R
R2
FUNCTION
V1
V2
˜
N/- 13
˜
˜
(21)
N.O.
11
22
7 N.C.
9 (10)
8
18 N.O.
20
MICROP.
1/5A
V1
21
10
R1
DISPLAY
1/5A
I1B
B2
2
1
34/38
23
24
B1
C
SS+
KEYBOARD
9 PIN MALE
=
IM30T
A
A
B C
25
A B C
B C
25
25
21
10
R1
DISPLAY
1/5A
26
26
26
27
27
27
28
39
29
28
39
29
28
39
29
41
30
32
43
31
41
30
32
43
31
41
30
32
43
31
42
42
42
33
33
33
R2
IM30T
FUNCTION
1/5A
1/5A
18
F46
F49
F50
F51
F50N
F51N
F51BF
I2t = K
PROGR.
INT.FAULT
R1
PRESA/TAP 31 Ion = 5A
PRESA/TAP 33 Ion = 1A
N/- 13
_
˜
˜
˜=
8 N.O.
18
20
N.C.
19
4
6
R3
R4
R2
R3
5
15
17
R5
R4
R5
In = 1A
L/+ 12
IEC 255
˜
˜
˜
BT 2 50
44
In = 5A
11
22
N.C.
7
9 (10)
MICROP.
1/5A
KEYBOARD
(21)
N.O.
16
RT
14
BIO
3
2
1
BIF
C
SS+
9 PIN MALE
34/38
23
24
Feeder Protection Relays
• 3 Phase O/C & E/F relay with Highset + Auto Reclosure (Optional)
• 3 Phase Directional O/C & E/F relay with Highset
Salient Features
• Display of various parameters,
trip count & trip data on LCD screen
• Separate LEDs for
various fault indication
• Built in self supervision & self testing
feature
• Wave form capturing
• RS485 Port for
serial communication with “MSCOM”
user friendly software
• Front RS232 Port for
local programming
Model
MC20
MC30
Description
Device Code
Design
Functions Available
3P O/C + E/F + Highset + Autoreclosing (Optional)
51, 51N, 50, 50N, 51BF, 79 (optional)
Numeric
Lowset O/C
2 Highset O/C Levels
Lowset E/F
2 Highset E/F Levels
Time current curves selectable according
to IEC/IEEE standards
Auto Reclose (In MC20-R)
Breaker Failure protection
Circuit Breaker control via serial port
Blocking Output and Blocking Input for pilot
wire selectivity coordination
Time tagged multiple event recording
Oscillographic wave form capture
Accepts 3 Digital inputs
Display LCD 16 (2 x 8) characters
3rd Harmonic Filter on the neutral input current
Password protection facility
1 A or 5 A site selectable
Display of parameters
Built in supervision
Modbus RTU / IEC870-5-103
Communication Protocols
Front RS232 Port for Local Programming
Oscillographic recording of input Quantities
RS485 serial communication port on Back Panel
0.1 VA for 1 A, 0.3 VA for 5 A
NA
< 7 VA
-100C to 550C
<1.5Kg
4 C/O Contacts
Drawout
83 x 164 x 225
64 x 137
3P O/C + E/F + Highset
51, 51N, 50, 50N, 49, 51BF
Numeric
Lowset O/C
2 Highset O/C Levels
Lowset E/F
2 Highset E/F Levels
Thermal image
Breaker Failure protection
Circuit Breaker control via Serial port
Blocking Output and Blocking Input for pilot
Wire selectivity coordination
Time tagged multiple event recording
Oscillographic wave form capture
Accepts 3 Digital inputs
Display LCD 16 (2 x 8) characters
Time current curves selectable according
to IEC/IEEE standards
Password protection facility
Rating
Other Features
Burden on CT
Burden on PT
Burden on Aux. Supply
Operating Temp
Weight
Output Contacts
Construction
Dim
Panel Cutout
1 A or 5 A site selectable
Display of parameters
Built in supervision
Modbus RTU / IEC870-5-103
Communication Protocols
Front RS232 Port for Local Programming
Oscillographic recording of input Quantities
RS485 serial communication port on Back Panel
0.1 VA for 1 A, 0.3 VA for 5 A
NA
< 7 VA
-100C to 550C
<1.5Kg
4 C/O Contacts
Drawout
83 x 164 x 225
64 x 137
Ordering Information
Aux. Supply Type 1
Type 2
24-110 V AC/DC
88-264 V AC/DC
24-110 V AC/DC
88-264 V AC/DC
19
Wiring Diagrams
MC20
A B C
A B C
6
DISPLAY
6
7
R1
R1
16
16
MICROP.
1/5A
7
R2
MC20
4
5
8
8
R3
15
R4
R1
F51
9
9
BT 2
PROGR.
50
INT.FAULT
17
R3
14
RELE’
DI USCITA
R3
R4
D3
20
D2
21
D1
19
22
DIGITAL
INPUTS
D3
20
D2
21
D1
19
22
INGRESSI
DIGITALI
H
L
In = □1A □5A
lon = □1A □5A
Auxiliary Supply
Alimentazione Ausiliaria
RS232
11
C
C
A (S+)
B (S+)
10
3
2
1
RELE’
DI USCITA
DIGITAL
INPUTS
INGRESSI
DIGITALI
13
12
TO I/0 RELAY
EXPANSION
ALL’ ESPANSIONE
DI I/0
3
COMUNE
COMUNE
2
1
RS485
RS485
A (S+)
B (S-)
KEYBOARD
TASTIERA
MS - SCE 1828 - R1
OUTPUT
RELAYS
15
12
F51N
1/5A
18
13
R2
F50N
OUTPUT
RELAYS
14
F50
1/5A
5
17
FUNZIONI
FUNCTIONS
4
R2
18
BPMC
MS - SCE 1828 - R1
Standard Output
MS - SCE 1839 - R2
I/O Output
MC30
DISPLAY
4
5
1/5A
MC30
6
7
1/5A
8
9
1/5A
FUNZION
FUNCTIONS
F50
F51
F50N
F51N
1/5A
In=
1A
5A
AUXILIARY SUPPLY 10
11
R1
16
R1
16
R2
18
R2
OUTPUT
18 RELAYS
17 RELE
14 DI USCITA
MICROP.
R1
17 OUTPUT
14 RELAYS
RELE
15
DI USCITA
13
R3
R4
R2
12
R3
D3
D2
R4
D1
20 DIGITAL
21 INPUTS
19 INCRESSI
22
DIGITAL
PROGR.
INT.FAULT
RS232
KEYBOARD
TASTIERA
C
A (S+)
B (S-)
3
2
1
R3
15
20
21
19
22
D3
D2
D1
L
H
C
RS485
A (S+)
B (S-)
DIGITAL
INPUT
INGRESS
DIGITAL
TO I/0 RELAY
13 EXPANSION
12 ALL ESPANSIONE
DI I/0
3 COMUNE
COMUNE
2 RS485
1
BPMC
MS-SCE1895-R2
Standard Output
20
MS -SCE1924-R2
I/O Output
Feeder Protection Relays / Vector Shift Relay
• 3 Phase Directional O/C & E/F relay with Highset
• 3 Phase voltage and frequency relay with vector shift
FMR - Salient Features :• Display of various parameters,
trip count & trip data on LCD screen
• Separate LEDs for
various fault indication
• Built in self supervision & self testing
feature
• Wave form capturing
• RS485 Port for
serial communication with “MSCOM”
user friendly software
• Front RS232 Port for
local programming
Model
FMR
UM30A
Description
Device Code
Design
Functions Available
Feeder Manager Relay
46, 49, 50/51, 67, 50N/51N, 67N, 27/59, 59UO, 74, 81, 86, 121, I2t
Numeric
Three levels for phase over current independently
programmable as directional or non directional
Three levels for Earth Fault independently programmable
as directional or non directional
Thermal image
Selectable Time current curves according to IEC and IEEE standards
Two over/under voltage levels
Two over/under frequency levels
Zero sequence over voltage level
Two Negative Sequence current levels
One Positive Sequence over voltage level
One Negative Sequence undervoltage level
Trip circuit supervision
Associated Circuit Breaker control
Breaker failure protection
Breaker interruption energy
1 A or 5 A site selectable / 100-125 V PTI
Graphical display 128 x 64 dots
Display of V, I, PF, kW, kVA, kVAr and thermal status
Modbus RTU / IEC870-5 Communication Protocols
RS232 serial communication port on front face
MIMIC diagram on LCD
Oscillographic recording of input quantities
RS485 serial communication port on Back Panel
Phase 0.01 VA at In = 1 A; 0.2 VA at In = 5 A Neutral
0.01 VA at In = 1A; 0.2 VA at In = 5 A
0.1 VA at UN
-100C to 550C
<2Kg
<10 VA
6 C/O Contacts
Drawout
121 x 164 x 224
113 x 142
Ordering Information
20-110 V AC/DC or
88-264 V AC/DC
3 Phase V and F relay with vector shift
24, 27d/59d, 47, 59, 59Uo, 78, 81
Numeric
Over Fluxing
Two Levels of under / over voltage
Two Levels of under / over frequency.
Zero seq. voltage
Voltage unbalance
Vector shift detection
Rating
Other Features
Burden on CT
Burden on PT
Burden on Aux. Supply
Operating Temp
Weight
Burden on Aux.
Output Contacts
Construction
Dim
Panel Cutout
Aux. Supply Type 1
Type 2
Display of Parameters
Built in Self supervision
RS485 Port
NA
0.2 VA / Phase at UN
8.5 VA
100C to 600C
< 2kg
3 C/O+(1 N/O + 1 N/C)+separate relay
1 C/O for self supervision
Draw out
121 x 158 x 224
113 x 142
20-110 V AC / DC or
88-264 V AC / DC
21
Wiring Diagrams
FMR
A B C
A B C
2
2
25
28
R1
3
3
4
4
5
5
6
6
7
7
8
8
9
9
41
41
42
43
42
43
44
45
44
45
46
46
47
47
48
ULTRA
15
14
Feeder
Manager
Relay
N.C
R3
25
R4
33
POWER
R5
32
R2
TRIP
15
22
31
R3
R6
R4
ON
D1
12
25
D2
15
D3
25
R5
OFF
R6
19
D4
38
+
-
27
17
11
16
21
H
L
FRONT-RS252
MS - SCE 1844-R3
BPU
34
37
ON
UM30A
25
A
C
MICROP.
27
UM30A
28
39
29
FUNCTION
41
30
EA
Uo
UC
EC
UA
UB
˜
˜˜
BT 2 50
44
EB
L/+ 12
N/- 13
R1
DISPLAY
26
B
_
˜
˜
˜=
R2
R3
F27 / 59
F27d / 59d
R1
F59s
F59U
F81
F59 / 81
R3
PROGR.
INT. FAULT
KEYBOARD
R2
R4
R5
R4
R5
14
BI<
BI>
C
SS+
9 PIN MALE
(21)
21
10
N.O.
11
22
N.C.
7
9
(10)
8
18
N.O.
20
19
N.C.
4
6
5
15
17
16
14
3
2
1
34/38
23
24
IEC 255
24(-20%) - 110(+20%)Vac 24(-20%) - 125(+20%)Vdc
22
N.O
34
In = □1A □5A
lon = □1A □5A
Auxiliary Supply
Alimentazione Ausiliaria
(25)
R1
48
Un = 230Vac MAX.
24
35
R2
Trip
Oxi. sup.
80(-20%) - 220(+20%)Vac 90(-20%) - 250(+20%)Vdc
DIGITAL
INPUTS
INGRESSI
DIGITALI
Control & Supervision Relays
• Power Management Relay
• Multifunction 3 Phase Measuring Instrument
Salient Features
• Display of various parameters,
event count & event data on 8 digit
alphanumeric display
• Separate LEDs for
various fault indication
• Four user programmable
output relays
• Built in self supervision &
self testing feature help maintenance
• Easy operation by 5 push buttons
• RS485 Port for
serial communication with “MSCOM”
user friendly software
Model
MW33
SPM21
RRS
Description
Device Code
Design
Functions Available
Power management
81, 27, 59, 32P, 32Q
Numeric
Frequence 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
Generator load sharing
95
Static
Active / reactive power
Over power
Load sharing
Frequency control
Other Features
Display of parameters
MD recording & data logging
RS485 Port, Event recording
Burden on CT
Burden on PT
Operating temp
Weight
Burden on Auxiliary supply
Output Contacts
Construction
Dim W x H x D in mm
Panel Cutout
O.2 VA for 5 A, 0.01 VA for 1 A
0.04 VA
100C to 600C
< 2kg
8.5 VA max
5 C/O
Draw out
121 x 158 x 224
113 x 142
Auto Synchronising Relay
25, 27
Numeric
Auto Synchronising with
Adjustable Voltage,
Adjustable Frequency,
Adjustable Phase angle
Adjustable Reclose time,
Bus Live / Dead operation,
Speed Regular Control,
Voltage Regulator Control,
Digital inputs to monitor
CB position
110V - 125 V PT input
Display of Parameters,
Built in self supervision,
RS485 Port
NA
0.04 VA
100C to 600C
< 2kg
8.5 VA
5 C/O
Draw out
121 x 158 x 224
113 x 142
110 V PT input
1 A / 5 A CT input
NA
< 5 VA
100C to 600C
<1.5kg
8.5 VA
3 N/O
Draw out
71 x 158 x 224
62 x 142
Ordering Information
Auxiliary supply Type 1
Type 2
20-110 V AC / DC
88-264 V AC / DC
20-110 V AC / DC or
88-264 V AC / DC
20-110 V AC / DC or
88-264 V AC / DC
Upto 380 V AC
1A /5A
23
Wiring Diagrams
MW33
25
26
MICROP.
27
1/5A
28
39
29
1/5A
41
MW33
R2
FUNZIONI
FINCTION
R3
F32 W
30
Un
Un
In = 1A
32
43
Wh
VARh
31
42
33
R4
R3
R4
R5
14
3
2
PROGR. R5
INT.FAULT
_
L/+12
L/- 13
Un = 100V
R1
R2
F32 VAR
44
In = 5A
21 (21)
10
11 N.O.
22
7 N.C.
9
8 (10)
18
20 N.O.
19
4 N.C.
6
5
15
17
16
14
3
2
1
34/38
23
24
R1
DISPLAY
1/5A
˜
˜˜
C
SS+
KEYBOARD
TASTIERA
=
9 PIN MALE
IEC 255
SPM21
DISPLAY
R1
21
10
R2
11
22
7
9
F
R3
8
18
20
F
R4
19
4
6
U
R5
5
15
17
U
25
MICROP.
UG
26
SPM21
FUNCTION
29
UB
F25SX
PROGR.
INT. FAULT
30
41
G1
UG
SPM21
52
R1
F+
R2
F-
R3
U+
R4
U-
R5
16
44
UB
L/+ 12
C
SS+
KEYBORD
B.I.
BR
52 (N.O.)
14
3
2
1
BX
BR
SX
34/38
23
24
9 PIN MALE
N/- 13
IEC 255
52
C
RRS
G
MEDIA
AVERAGE
15
14 To other RRS Relays
R1
3
+
+
-
12
INCREASE
13
1
SETTINGS
4
VOIOCOS
7
T
Operation
+
R2
6
2
OPTO
8
9
+
OPTO
R3
+
-
DECREASE
17
OVER POWER
18
Lood Shedding
22
2
24
1
(.)
(.)
Freq. control
21 11 10
3
1
2
Open
Open
Open
Open
Open
Open
Open
Open
Lood
Shedding
Yes
Yes
Yes
Yes
3
Freq. control
Open
Close
Yes
No
Voltage and Frequency
Relays
• 3 Phase Voltage and frequency relay with df/dt & dv/dt
• 1 Phase Voltage and frequency relay
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
Model
UFD34
MC1V
MC3V
Description
3 Ph Voltage and
Frequency Relay
81, 27, 59, df/dt, dv/dt
Numeric
Selectable 4 stages
of frequency as Under/
Over frequency
Selectable 2 stages of
voltage as Under/Over
voltage
Selectable 2 stages of df/dt
Selectable 1 stages of de/dt
Blocking Output and
Blocking Input
Time tagged multiple
event recording
Single phase Voltage and
Frequency Relay
27, 59, 81
Numeric
Two Under Voltage elements
Two Over Voltage elements
One UnderFrequency element
One OverFrequency element
Blocking Output and Blocking
Input
Time tagged multiple event
recording
Oscillogarphic wave form capture
Display LCD 16 (2 x 8) characters
3 Ph Voltage and
Frequency Relay
27, 59, 47, 59 V 0, 81
Numeric
Two Under Voltage elements
Two Over Voltage elements
One Under Frequency element
One Over Frequency element
One Zero Sequence Over Voltage Element
One Negative Sequence Under Voltage Element
One Positive Sequence Over Voltage Element
Oscillographic wave form capture
Modbus RTU / IEC870-5-103
Communication Protocols
Display LCD 16 (2 x 8) characters
Device Code
Design
Functions Available
Rating
Other Features
100-125 V
Display of parameters
Built in self supervision
Oscillogarphic recording of
input quantities
RS485 serial communication
port on Back Panel
Burden on CT
Burden on PT
Operating temp
Weight
BurdenonAuxiliary
Output Contacts
Not Applicable
0.04 VA
-100C to 600C
<2.5Kg
8.5 VA
4 C/O Contacts + 1 C/O for
Self supervision
Drawout
121 x 164 x 224
113 x 142
Construction
Dim W x H x D in mm
Panel Cutout
Auxiliary Supply
20-110 V AC/DC or
88-264 V AC/DC
100-125 V
Display of parameters
Built inSelf supervision
Modbus RTU / IEC870-5-103
Communication Protocols
Front RS232 Port for Local
Programming
Oscillogarphic recording of input
quantities
RS485 serial comunication port on
Back Panel
0.1 VA for 1 A, 0.3 VA for 5 A
NA
-100C to 550C
<1.5Kg
<7 VA
4 C/O Contacts + 1 C/O for Self
supervision
Drawout
83 x 164 x 224
64 x 137
Ordering Information
20-110 V AC/DC or
88-264 V AC/DC
100-125 V
Display of parameters
Built in self supervision
Modbus RTU / IEC870-5-103
Communication Protocols
Front RS232 Port for Local
Programming
Oscillogarphic recording of input
quantities
RS485 serial communication port on
Back Panel
0.1 VA for 1 A, 0.3 VA for 5 A
NA
-100C to 550C
<1.5Kg
<7 VA
4 C/O Contacts + 1 C/O for Self
supervision
Drawout
83 x 164 x 224
64 x 137
20-110 V AC/DC or
88-264 V AC/DC
25
Wiring Diagrams
UFD34
25
A
26
28
39
29
C
FUNCTION
F81 - 1
41
30
IEC 255
N/- 13
_
˜
˜
˜
R3
8
18
20
R4
19
4
6
R5
5
15
17
R1
F81 - 2
L/+ 12
R2
UFD34
R2
F81 - 3
F81 - 4
R3
Fdf / dt
F27 / 59
R4
PROGR.
INT. FAULT
R5
N.O.
11
22
7
9
MICROP.
27
B
(21)
21
10
R1
DISPLAY
C
SS+
=
N.O.
N.C.
16
14
3
2
1
34/38
23
24
14
BI<
BI>
KEYBOARD
N.C.
(10)
9 PIN MALE
MC1V
DISPLAY
R1
R1
16
16
MICROP.
5
1F27
2F27
1F59
R3
R4
PROGR.
20 DIGITAL
21 INPUTS
D3
D2
R4
R3
14
RELE’
DI USCITA
12
2F59
INT.FAULT
17
D3
20
D2
21
D1
19
22
19 INGRESSI
DIGITALI
22
D1
C
A (S+)
B (S-)
10
RS232
11
3
2
1
C
DIGITAL
INPUTS
INGRESSI
DIGITALI
13
12
TO I/0 RELAY
EXPANSION
ALL ESPANSIONE
DI I/0
3
COMUNE
COMUNE
2
1
RS485
RS485
A (S+)
B (S-)
KEYBOARD
TASTIERA
MS - SCE 1836 - R2
RELE’
DI USCITA
15
H
L
Auxiliary Supply
Alimentazione Ausiliaria
OUTPUT
RELAYS
13
R2
R3
OUTPUT
RELAYS
14
15
R1
18
18
17
FUNZIONI
FUNCTIONS
4
R2
R2
MC1V
BPMC
MS - SCE 1836 - R2
Standard Output
MS - SCE 1837 - R2
I/O Output
MC3V
DISPLAY
4
A
R1
16
R1
16
R2
18
OUTPUT
RELAYS
R3
17
14
RELE’
DI USCITA
MICROP.
5
MC3V
6
B
FUNZIONI
FUNCTIONS
7
F27
F47
9
F27d
F59d
15
R1
R4
R4
INT.FAULT
UB
RELE’
DI USCITA
12
R2
R3
OUTPUT
RELAYS
D3
20
D2
21
DIGITAL
INPUTS
D1
19
22
INGRESSI
DIGITALI
D3
20
D2
21
D1
19
22
INGRESSI
DIGITALI
13
12
TO I/0 RELAY
EXPANSION
ALL ESPANSIONE
DI I/0
C
3
COMUNE
COMUNE
A (S+)
2
1
RS485
L
H
R5
EB
Auxiliary Supply
Alimentazione Ausiliaria
10
RS232
11
C
A (S+)
B (S-)
3
2
1
RS485
KEYBOARD
TASTIERA
MS - SCE 1834 - R1
B (S-)
DIGITAL
INPUTS
BPMC
MS - SCE 1834 - R1
Standard Output
26
15
13
UA
PROGR.
EC
17
14
F59
EA
UC
18
R3
F24
8
C
R2
MS - SCE 1835 - R1
I/O Output
Notes
Notes
Electrical Standard Products (ESP) Branch Offices:
REGISTERED OFFICE AND
HEAD OFFICE
L&T House, Ballard Estate
P. O. Box 278
Mumbai 400 001
Tel: 022-6752 5656
Fax: 022-6752 5858
Website: www.Larsentoubro.com
ELECTRICAL STANDARD PRODUCTS (ESP)
501, Sakar Complex I
Opp. Gandhigram Rly. Station
Ashram Road
Ahmedabad 380 009
Tel: 079-66304007-11
Fax: 079-26580491 / 66304025
e-mail: esp-ahm@LNTEBG.com
38, Cubbon Road, Post Box 5098
Bangalore 560 001
Tel: 080-25020100, 25593613
Fax: 080-25580525
e-mail: esp-blr@LNTEBG.com
131/1, Zone II
Maharana Pratap Nagar
Bhopal 462 011
Tel: 0755-4098706 / 7 / 8 / 9
Fax: 0755-2769264
e-mail: esp-bho@LNTEBG.com
Plot No. 559, Annapurna Complex
Lewis Road
Bhubaneswar 751 014
Tel: 0674-6451342, 2436696
Fax: 0674-2537309
e-mail: esp-bbi@LNTEBG.com
SCO 32, Sector 26-D
Madhya Marg, P. O. Box 14
Chandigarh 160 026
Tel: 0172-4646841 to 7
Fax: 0172-4646802
e-mail: esp-chd@LNTEBG.com
10, Club House Road
Chennai 600 002
Tel: 044-28462072 / 4 / 5 / 2109
Fax: 044-28462102 / 3
e-mail: esp-maa@LNTEBG.com
67, Appuswamy Road
Post Bag 7156
Opp. Nirmala College
Coimbatore 641 045
Tel: 0422-2588120 / 1 / 5
Fax: 0422-2588148
e-mail: esp-cbe@LNTEBG.com
L&T House, Group MIG - 5
Padmanabhpur
Durg 491 001
Tel: 0788-2213833 / 14 / 28 / 29
Fax: 0788-2213820
A1/11, Astronauts Avenue
Bidhan Nagar
Durgapur 713 212
Tel: 0343-2536891 / 8952 / 7844
Fax: 0343-2536493
e-mail: esp-dgp@LNTEBG.com
Milanpur Road, Bamuni Maidan
Guwahati 781 021
Tel: 0361-2651297
Fax: 0361-2551308
e-mail: esp-gau@LNTEBG.com
II Floor, Vasantha Chambers
5-10- 173, Fateh Maidan Road
Hyderabad 500004
Tel: 040-66720250
Fax: 040-23296468
e-mail: esp-hyd@LNTEBG.com
D-24, Prithvi Raj Road, C-Scheme
Jaipur 302 001
Tel: 0141-2385916 / 8
Fax: 0141-2373280
e-mail: esp-jai@LNTEBG.com
Akashdeep Plaza, 2nd Floor
P. O. Golmuri
Jamshedpur 831 003
Jharkhand
Tel: 0657-2340864 / 387
Fax: 0657-2341250
e-mail: esp-jam@LNTEBG.com
Skybright Bldg. M. G. Road
Ravipuram Junction, Ernakulam
Kochi 682 016
Tel: 0484-4409420 / 4 / 5 / 7
Fax: 0484-4409426
e-mail: esp-cok@LNTEBG.com
3-B, Shakespeare Sarani
Kolkata 700 071
Tel: 033-44002572 / 3 / 4
Fax: 033-22822589
e-mail: esp-ccu@LNTEBG.com
A28,Indira Nagar, Faizabad Road
Uttar Pradesh,
Lucknow 226 016
Tel: 0522-2312904 / 5 / 6
Fax: 0522-2311671
e-mail: esp-Lko@LNTEBG.com
Plot No. 518
4th Main Road
K. K. Nagar
Madurai 625 020
Tel: 0452-2537404, 2521068
Fax: 0452-2537552
e-mail: esp-mdu@LNTEBG.com
EBG North Wing Office - 2
Powai Campus
Mumbai 400 072
Tel: 022-67052874 / 2737 / 1156
Fax: 022-67051112
e-mail: esp-bom@LNTEBG.com
#12, Shivaji Nagar
North Ambazari Road
Nagpur 440 010
Tel: 0712- 2260012 / 3
Fax: 0712- 2260020 / 30
e-mail: esp-nag@LNTEBG.com
32, Shivaji Marg
P. O. Box 6223
New Delhi 110 015
Tel: 011-41419514 / 5 / 6
Fax: 011-41419600
e-mail: esp-del@LNTEBG.com
L&T House
P. O. Box 119
191/1, Dhole Patil Road
Pune 411 001
Tel: 020-26135048
Fax: 020-26124910, 26135048
e-mail: esp-pnq@LNTEBG.com
3rd Floor
Vishwakarma Chambers
Majura Gate, Ring Road
Surat 395 002
Tel: 0261-2473726
Fax: 0261-2477078
e-mail: esp-sur@LNTEBG.com
Radhadaya Complex
Old Padra Road
Near Charotar Society
Vadodara 390 015
Tel: 0265- 2311744 / 6613610 / 1 / 2
Fax: 0265-2336184
e-mail: esp-bar@LNTEBG.com
48-8-16, Dwarakanagar
Visakhapatnam 530 016
Tel: 0891-6620411-2 / 3
Fax: 0891-6620416
e-mail: esp-viz@LNTEBG.com
Product improvement is a continuous process. For the latest information and special applications, please contact any of our offices listed here.
Electrical Standard Products
Larsen & Toubro Limited
Powai Campus, Mumbai 400 072
Customer Interaction Center (CIC)
BSNL / MTNL (toll free) : 1800 233 5858
Reliance (toll free)
: 1800 200 5858
Tel : 022 6774 5858
Fax : 022 6774 5859
E-mail : cic@LNTEBG.com
Website : www.LNTEBG.com
SP 50297-R1
070710