Digital Protective Relays
Larsen & Toubro
Larsen & Toubro is a technology-driven company that infuses engineering with
imagination. The Company offers a wide range of advanced solutions in the field of
Engineering, Construction, Electrical & Automation, Machinery and Information
Technology.
L&T Switchgear, a part of the Electrical & Automation business, is India's largest
manufacturer of low voltage switchgear, with the scale, sophistication and range to
meet global benchmarks. With over five decades of experience in this field, the
Company today enjoys a leadership position in the Indian market with a growing
international presence.
It offers a complete range of products including powergear, controlgear, industrial
automation, building electricals & automation, reactive power management, energy
meters, and protective relays. These products conform to Indian and International
Standards.
L&T 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.
Switchgear Factory, Mumbai
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 - MC12A, ME12A, SC14S
5
Reverse Power Relay - MRP11
7
Voltage Relay - MV12
Power Factor Control Relays - etaCON Series
RPM14, RPM08
9
11
Motor Protection Relays - MM30, MM30W, N-DIN-MA
MCOMP, MPR300
13
15
Generator Protection Relays - MG30, MG30I, MD32G
17
Transformer Protection Relays - IM30T, MD32T, MD32TM
19
Feeder Protection Relays - MC20, MC30
21
Vector Surge Protection Relay - UM30A, FMR
23
Control & Supervision Relays - MW33
Synchronising Load Sharing Relays - SPM21, RRS
25
Voltage and Frequency Relays - MC1V, MC3V, UFD34
27
Schematic - Relay Application
29
ANSI/IEEE
Correlation between ANSI/IEEE device function number and relays
Device
No.
Function
Name
21
25
27
Under impedance relay / Distance relay
Auto synchronising
Synchro-check relay
AC under voltage relay
32
37
Power directional relay
Under current or under power relay
40
45
46
Field control (loss of field) relay
DC over voltage relay
Reverse phase or phase balance current relay
47
49
Phase-sequence or single-phasing voltage relay
Machine or transformer thermal relay
50
Instantaneous over current (or rate-of-rise) relay
L&T
Relays
MV12
MRP11
MPR300
ME12
MC12A
MC61A / MC61C
51V, 50V
50BF
50N
Voltage restrained over current relay
Breaker - failure
Instanteneous earth fault over current relay
51
AC time over current relay
51N-(51G)
Ground fault time over current relay
58
59
Rectifier failure relay (rotating diodes)
AC over voltage relay
59/81
60
64
64S
64R
67
67N-(67G)
76
78
79
80
81
Overexcitation relay V/Hz
Voltage balance relay
Ground detector (insulation to ground failure of machine or other apparatus)
Machine stator ground fault detector relay
-Machine rotor ground fault detector relay
-AC directional over current relay
-Directional ground fault over current relay
-DC over current relay
–
Phase angle measuring or out of-step protection relay
–
Reclosing relay
-DC under voltage relay
-Frequency relay
–
-Lock-out relay
-Differential protective relay
SC14S
-Ground fault differential protective relay
–
Regulating device to adjust a quantity
–
Automatic active or reactive load sharing relay
–
Vector surge protection relay
Rate of change of frequency
–
86
87
87N-(87G)
90
95
df/dt
1
MC12A
MC61A
MC61C
MC12A
MC61A
MC31A
MC61C
MC12A
MC61A
MC31A
MC61C
–
MV12
---
MS
Relays
MG30 / MG30-I
SPM21
SCM21
UM30-A / MC1V / MC3V
UFD34
MG30 / MW33 / MG30-I
MM30
MW33
MG30 / MG30-I
UBC / 45
IM30T
MM30
UM30-A, MC3V
IM30T
MG30 / MG30-I
MM30 / MM30-W
MC20 / MC30
IM30-T / IM30-AP
FMR
MG30 / MG30-I
MG30 / MG30-I
MC20 / MC30 / FMR / IM30T / IM30AP
IM30 AP / IM30-T
MC20 / MC30
FMR / IM30-T
IM30-AP / IM30-T
MC20 / MC30
FMR / IM30-T
-IM30-AP / IM30-T
MC20 / MC30
FMR
-RHS
-UFD34, MW33
UM30-A / MG30 / MG30-I
UM30-A
MG30
MG30
UBO / CR
FMR
FMR
–
IM30-GOS
MC20R
UBC / 80
UM30-ASV / MG30
UFD34 / MC1V / MC3V / MW33
-MD32G
MD32T / MD32TM
MD32G, MD32T
-RRS
UM30-A
UFD34
Time - Current Characteristics
Product Design Standards
Reference standards
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
:
:
:
:
:
:
:
:
:
:
:
IEC 60255, IEC 61000, IS3231, IS8686
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
50 msec 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
Description
3 Phase O/C + E/F
MC61A
MC61C
3 Phase O/C + E/F + Highset
Communication and breaker control
Device code
50/51 RYBN
51 RYBN
50/51 RYBN
Design
Numerical relay
Numerical relay
Numerical relay
Lowset O/C - Is
Lowset O/C - Is
Lowset O/C - Is
Highset O/C - Ihs
Lowset E/F - Os
Highset O/C - Ihs
Functions available
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%
O/C Is = 20-200% step 5%
E/F Os = 5-80% 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 Time characteristics available 0.2 in or disable
0.2 in or disable
NI, VI, EI, definite time
Settings
HS E/F = (0.1 to 20) x on step of - HS E/F = (0.1 to 20) x on step of TMS 0.1 - 1.6 step 0.05
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.
Site selectable trip time char.
sec or inst.
RS485 communication
Highset can be disabled
Other features
Breaker control
Display of currents, trip count
Display of currents, trip count
Auto doubling of highset, Self supervision feature
Self supervision feature
Relay co-ordination - BI & BO
Burden on CT
≤ 0.25 VA on CT/Phase
≤ 0.25 VA on CT/Phase
≤ 0.25 VA on CT/Phase
Burden on PT
Not applicable
Not applicable
Not applicable
Operating temp
00C to 600C
00C to 600C
0 0C to 600C
Weight
< 2kg
< 2kg
< 2kg
Burden on auxiliary supply ≤ 10 VA
≤ 10 VA
≤ 10 VA
Output contact
1 N/O Contact for self supervision 1 N/O Contact for self supervision 1 N/O Contact for self supervision, 1N/O for trip
Construction
Drawout
Drawout
Drawout
121 x 158 x 224
121 x 158 x 224
121 x 158 x 224
Dim W x H x D in mm
113 x 142
113 x 142
113 x 142
Panel cutout
Ordering Information
20-110 V AC / DC or
20-110 V AC / DC or
Auxiliary supply Type 1 20-110 V AC / DC or
88-264 V AC / DC
Type 2 88-264 V AC / DC
88-264 V AC / DC
1 A or 5 A
1 A or 5 A
1 A or 5 A
CT Rating
(not site selectable)
(site selectable)
(site selectable)
4 NO
4 NO or 2 NO + 2 NC
4 NO or 2 NO + 2 NC
Output contacts
3
3 Phase O/C + E/F + Highset
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
9
MICRO
CONTROLLER
10
R2
MC61C
PROTECTION
13
13
5
5
6
6
F51(Os)
15
15
F50(Ihs)
16
16
F51(Ohs)
7
7
8
8
F50(Is)
12
R3
17
R4
Y
B
E
D2
D3
In =
0n =
1A ;
1A ;
5A
5A
L/+
PROG
ERROR
25
˜
N/- 26
18
OPEN
27
BKR
28
CLOSE
29
21
22
NC
BKR
R5
D1
R
NO
11
C
30
19 L/R
20 BI*
31
32
SS+
9 PIN MALE
4
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
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%
Functions available
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
Auxiliary supply
CT Rating
Range setting
5
Type 1
Type 2
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
0.25 VA on CT
Not applicable
Not applicable
00C - 600C
00C to 600C
< 1.5kg
< 1.5kg
5.5 VA
5.5 VA
2 C/O Contacts (S/R)
2 C/O Contacts (S/R)
Drawout
Drawout
71 x 158 x 224
71 x 158 x 224
62 x 142
62 x 142
Ordering Information
20-110 V AC / DC or
20-110 V AC / DC or
88-264 V AC / DC
88-264 V AC / DC
1 A or 5 A
1 A or 5 A
10-40% or 20-80% or 50-200%
Site selectable
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)
Drawout
71 x 158 x 224
62 x 142
Not applicable
1 A or 5 A
10-40% or 20-80%
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)
In
AUX SUPPLY
24 - 110V AC/DC
95 - 240V AC/DC
1A
5A
ME12
(1-16)% In
MC12A
(10-40)% In
(20-80)% In
(50-200)% In
SC14S
11
2
10
˜
9
1
Control
Ckt.
R
3
7
+
5
DC-DC
Test (24V)
Voltage
Test
6
Convrt.
8
4
12
SC14S
In
1A
5A
CT OPERATED RELAY
NO AUXILIARY SUPPLY
REQUIRED
SETTING RANGE (Is)
(10-40)% IN
(20-80)% IN
6
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
MRP11
MV12
Description
Device code
Design
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
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
Functions available
Settings
Other features
Burden on PT
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
CT Rating
PT Rating
7
Type 1
Type 2
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
LED indication
Test feature
< 0.25 VA
< 0.05 VA
00C to 600C
< 1.5kg
< 8 VA
1 N/O + 1 C/O
Drawout
71 x 158 x 224
62 x 142
Ordering Information
20-110 V AC / DC
88-264 V AC / DC
1 A or 5 A
Upto 380 V AC
Site selectable U/V or O/V
Site selectable trip time char.
< 0.25 VA
0.075 VA on PT
00C to 600C
< 1.5kg
8 VA
2 C/O Contacts (S/R)
Drawout
71 x 158 x 224
62 x 142
20-110 V AC / DC
88-264 V AC / DC
Not applicable
110 V / 240 V / 415 V (site selectable)
Wiring Diagrams
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
Power Factor Control Monitoring Relays
• Intelligent Power factor controllers with Automatic set-up
and TTL/RS232 Port
Ne
Salient Features
w
• Auto / Manual mode
• Measurement Sensitivity - 2.5%
096
• 4 Quadrant / 2 Quadrant operation
• Automatic recognition of current flow direction
• Online display of PF, Voltage, Current, kVAr,
capacitor overload and Panel temperature
• The last two contacts are programmable as alarm
and / or fan control except for etaCON 3
• Capacitor over-current and panel over-heating protection
etaCON Series
• Use in co-generation systems - 4 Quadarant operation
Inbuilt Controller Set-up feature provides an option of Automatic configuration of etaCON
controller.
TTL / RS232 Communication port to interface with PC for quick set-up, function and alarm
customising and testing.
etaCON L series APFC relay
Product
Model
No.of steps
Design
Display
Current Input
Voltage Input
Rated Frequency
etaCON L3; etaCON L5; etaCON L7
3, 5, 7
Instantaneous PF, V, I, kVAr, Capacitor Over load
Panel temperature, Average weekly PF,
Maximum Voltage, current, capacitor overload, panel temperature value
Measurement
Setting
Target PF adjustment: 0.8 inductive to 0.8 capacitive
Reconnection time of same capacitor: 5 - 240 secs
Switching time sensitivity: 5 - 600 secs
Alarms
Under/ Over compensation; Low/ High Current; Low/ High Voltage; Capacitor Overload due to
harmonic Voltage; Over temperature; No-voltage release
Power consumption
Burden on CT
Dimensions W x H x D in mm 96 x 96 x 96 mm
Panel cutout
92 x 92 mm
Voltage Input
CT Input
No.of steps
9
etaCON L8; etaCON L12
8, 12
Digital Microprocessor based
3 Digit LED
5 Amp
415 VAC ± 15%
50/ 60 Hz
415 V AC
5 A secondary
3; 5; 7 steps
Less than 10 VA
Less than 0.8 VA
144 x 144 x 93 mm
138.5 x 138.5 mm
Ordering Information
415 V AC
5 A secondary
8; 12 steps
Wiring Diagrams
etaCON L3/L5/L7
MAINS
L1L2 L3
1 2
3 4
5 6
7
1 2
3 4
5 6
7 8
Voltage
Current
415V
/5A
9
S1 S2
10
C
FU11
CT1
OS1
FU2
FU1
FU8
FU9
FU7
FU10
KM1
KM2
KM7
LOAD
K1
K7
K2
etaCON L8/L12
MAINS
L1L2 L3
Current
/5A
S1 S2
1 2
3
4
5
6
7
8
1 2
3
4
5
6
7
8 9 10 11 12 13 14
9 10 11 12
Voltage
415V
15
16
C
CT1
FU16
OS1
FU1
FU13
FU14
FU12
FU2
FU15
KM1
KM2
KM12
LOAD
K1
K2
K12
10
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 status-lead / lag / unity
• Auto / Manual mode
• Measurement sensitivity of 1%
• Automatic C/K correction
• Display of Current, 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 selection
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
Ordering Information
240 V AC
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 selection
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
Auxiliary supply
11
240 V AC
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
Load
B
N
RPM-14
Ph
240V AC
1
R13
R2
2
R14
R3
3
13
50 Hz
N
14
15
-
16
S2
17
S1(1A)
18
S1(5A)
R4
4
R5
5
R6
6
R7
7
19
R8
8
20
+
+
R9
9
21
R10
10
22
R11
11
23
R12
12
24
Bank #1
ALARM
R1
Bank #14
R
Y
B
To
Load
N
12
Motor Protection Relay
• Motor protection relay
• Motor protection relay with voltage input
Salient Features
• Display of various parameters, trip count and trip
data
• LEDs for fault indication
• User programmable output relays
• Built in self supervision & self testing feature helps
maintenance
• RS485 Port for serial communication with “MSCOM”
user friendly software
Model
MM30
Description
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,
Device code
ltr, 55, 68, 81, 47, 12/14, 27/59
Design
Numeric
Trip circuit supervision
Thermal O/L and Pre-alarm
Locked rotor
Current unbalance, phase reversal,
phase loss
Over current
Earth fault
Functions available
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
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
Other features
(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
0.04 VA
Not applicable
Burden on PT
100C to 600C
100C to 600C
Operating temp
< 2kg
< 2kg
Weight
8.5 VA
8.5 VA
Burden on auxiliary
4 C/O + 1 C/O for self supervision
4 C/O + 1 C/O for self supervision
Output contacts
Drawout
Drawout
Construction
121 x 158 x 224
121 x 158 x 224
Dim W x H x D in mm
113 x 142
113 x 142
Ordering Information
20-110 V AC / DC or
20-110 V AC / DC or
Auxiliary supply
88-264 V AC / DC
88-264 V AC / DC
13
N-DIN-MA
Motor protection
49, 51LR, 46, 37, 50/51, 64, St no, 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
Wiring Diagrams
MM30
A
B
A B C
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.
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.
3
2
1
34/38
23
24
C
SS+
Keyboard
PRESA/TAP 31:Ion=5A
PRESA/TAP 33:Ion=1A
(21)
N.O.
16
14
R4
R5
Int. Fault
44
11
22
7
9
R2
Function
F37
F46
F49
F51
F51R
F64
St.No.>
AI.0>
Itr
21
10
R1
Display
9 Pin Male
IEC 255
N-DIN-M
N-DIN-M
A
B
A
C
10
B
A
C
B
C
10
FFP
Display /
10
11
11
11
8
8
8
9
9
9
Keyboard / Signals
A B + 0
RS485
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 1
Digital Input 2
T
T
6
7
D1
D2
0
Thermistor Input
C 2
Common
1
RTD
15
R2
St.Ctrl
PWR / I.R.F
Trip
ON
OFF
14
B (S-)
A (S+)
RS485
4
5
21
22
MS - SCE 1752 - R1
14
Motor Protection Relay
• Intelligent motor protection & control relay - MCOMP
• Economical motor protection relay - MPR 300
MPR 300
MCOMP Relay
Model
MCOMP
MPR 300
Description
Motor protection
49, 14, 46, 50N, 3, 59, 27, 47,
81H, 81L, 66, 27LV, 47a, 47b
Numeric
Thermal over load
Locked rotor
Current unbalance
Phase loss
Under current
Over voltage
Under voltage
Over frequency
Under frequency
Max. no. of starts
Reacceleration
Phase reversal
Intelligent relay with separate
protection, display and CT
modules
Suitable for 50/ 60 Hz
Can be used with DOL,
RDOL and Star delta starters
Communication options Modbus RTU, Modbus TCP IP and Profbus
Not applicable
Not applicable
10 to 600C
< 2kg
< 8 VA
4 C/O
Split protection unit 92 x 123 x 103.95
80 - 240 V AC/DC
Motor protection
49, 51LR, 64, 46, 37
Device code
Design
Functions available
Other features
Burden on PT
Burden on CT
Operating temp
Weight
Burden on auxiliary supply
Output contacts
Dim W x H x D in mm
Auxiliary supply
15
Numeric
Thermal overload
Locked rotor
Earth fault
Single phasing
No load running
upto 88 A
Trip time characteristics
as per
IEC947
Not applicable
Not applicable
0-600C
< 0.5kg
< 8 VA
1NO+1NC
Not applicable
240 V AC
Wiring Diagrams
MCOMP Relay
Typical Dol feeder with
M COMP
415V, 3PH, 4-wire, 50Hz
R
Y
B
N
PH
240V AC Test Bus
N
F11
111 6A 112
F12
121 6A 122
F13
131 6A 132
N11 - 201
6
Drive
Available
K4
S2
P1
T3
P2
S1
Y
B
S2
R
XC1-5
XC1-6
XC1-7
XC1-8
XC1-9
XC1-10
M COMP
CT UNIT
S1
X-42
S2
X-43
S
S
T4
CBCT
Y
B
D1
81 82 83 84 85 86 87 88 89 90 91 92
C8
C2
PMR/
COMM
Digital Output Relay
C3
L&T Make
MCOMP
C7 AUX.
VOLT
C6 DIGITAL INPUTS
N PH
61 62 63 64 65 66 67
71 72
Motor
Status
PMR/
CO
LED
DISPLAY
ESE
Alarm
Pickup
P 75
ESC
ELECT
TRIP
C4
N 76
E 77
RS485
M COMP
PH
K3
106
82
Hand
Start
P.B.
Hand
RST
P.B.
Unused DI
M
S1
81
83
K3
106
85
84
86
87
43
K3
106
88
89
Trip
S1
1 2 3 8
N BY R
C1 Ref. Voltage
Stop Command
Start Command
Start Command
R
T5
XC1-2
XC1-3
XC1-4
S2
P1
T2
P2
K3
XC1-1
K4
44
11
Stop
P.B
12
A1
K4
21
H2
R
A2
22
11
Trip
Led
5
Unused Do
Run
Led
3
S1
CBCT
1
P1
T1
P2
Trip
Run
Drive
Available
4
2
L11 - 201
Run
Q1
NLK
X-25 T X-26 T
H1
G
12
N
MPR300 Relay
R
Y
B
N
Aux. N/O
Start
N/O
Stop
(N/C)
1
2
NC
3
4
5
6
NO
MPR300
M
7
8
Aux
Supply
Typical connection diagram
for ‘Direct Starting’ application
16
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
Description
MG30
MG30-I
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,
Device code
50V/51V, 51BF, 60FL, 64S, 68, 81
50V/51V, 51BF, 60FL, 64S, 68, 81
Design
Numeric
Numeric
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
Functions available
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.
1 A or 5 A site selectable
1 A or 5 A site selectable
Display of parameters
Display of parameters
Other features
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
Operating temp
100C to 600C
100C to 600C
Weight
< 2kg
< 2kg
3 C/O + (1 N/O + N/C) + separate relay
3 C/O + (1 N/O + N/C) + separate relay
Output contacts
1 C/O for self supervision
1 C/O for self supervision
Construction
Drawout
Drawout
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
Type 1
20-110 V AC / DC or
20-110 V AC / DC or
Auxiliary supply
Type 2
88-264 V AC / DC
88-264 V AC / DC
17
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
Drawout
121 x 158 x 224
113 x 142
20-110 V AC / DC or
88-264 V AC / DC
Wiring Diagrams
MG30
25
Display
21
10
R1
1/5A
MG30
1/5A
27
11
22
7
9
R2
Funzioni
Function
1/5A
28
39
29
G
N.O. N.C.
Microp.
26
R3
8
18
20
R4
19
4
6
R5
5
15
17
1>,Z<,Uo>
1/5A
30
41
12>,T>
R1
Zc<, O>
R2
U,f
1/5A
W<, Ir>
31
42
32
43
2
1
33
MG30
Progr.
Int. Fault
1/5A
44
37(b)
R5
To Rex
Relay
38(a)
Expansion
23
24
C
S–
S+
Keyb0ard
Tastiera
12
13
CE
MS-SCE 1629-R0
In=5A
In=1A
N.O. N.C.
14
3
14
3
2
R4
B.I./B.F.
(10 – 11)
16
R3
IC, 60FL
1/5A
(21 – 22)
9 PIN MALE
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.
1/5A
33
Int.fault
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.
R2
1/5A
MD32-G
27
1/5A
28
39
Function
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
1/5A
33
L/+ 12
N/- 13
Progr.
Int. Fault
1/5A
˜˜˜
50-60
_
˜
˜
˜=
Keyboard
R5
N.O.
N.C.
(10)
N.O.
N.C.
16
14
1/5A
31
42
32
43
R
R2
R3
1/5A
I2A
R1
(21)
3
B2
B1
C
SS+
2
1
34/38
23
24
9 Pin Male
18
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
Description
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
19
Type 1
Type 2
MD32T
MD32TM
IM30T
Transformer differential +
Restricted E/F
87 RYB, 87N
Transformer differential
3 Ph O/C, E/F + Thermal
50/51 RYBN, 49, 46, I2t, 51BF,
50N/51N
Numeric
Numeric
Lowset differential
Lowset O/C
Lowset op time : <=30mS
Highset O/C
Highset differential
Lowset E/F
Highset op time : 6-20mS
Highset E/F
Dual slope bias
Thermal overload
Highset can be Biased / Unbiased Lowset current unbalance with
2nd harmonic restraint setting
Definite / Inverse time tripping
5th harmonic restraint setting
Highset current unbalance
Auto correction of CT ratio
Inrush energy protection
Zero sequence compensation
CB failure function
Blocking function
Blocking function
87 RYB
Numeric
Lowset differential
Lowset op time : <=30mS
Highset differential
Highset op time : 6-20mS
Restricted earth fault
Dual slope bias
Highset can be Biased / Unbiased
2nd harmonic restraint setting
5th harmonic restraint setting
Auto correction of CT ratio
Zero sequence compensation
Blocking function
Display of parameters
Display of parameters
Built in self supervision
Built in self supervision
RS485 port
RS485 port
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
100C to 600C
100C to 600C
< 2kg
< 2kg
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
Draw out
Draw out
121 x 158 x 224
121 x 158 x 224
113 x 142
113 x 142
Ordering Information
20-110 V AC / DC
20-110 V AC / DC
88-264 V AC / DC
88-264 V AC / DC
Display of parameters
Built in self supervision
RS485 port
1 A or 5 A site selectable
0.2 VA for 5 A, 0.01 VA for 1 A
100C to 600C
< 2kg
8.5 VA
5 C/O, S/R or H/R or Time del
Draw out
121 x 158 x 224
113 x 142
20-110 V AC / DC
88-264 V AC / DC
Wiring Diagrams
MD32T / MD32TM
A
B C
I1A
87T + 87N
25
In1
26
I1C
MD32T
27
28
39
V1
V2
V1
á
V2
1/5A
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
˜
˜
N.O.
11
22
7 N.C.
9 (10)
8
18 N.O.
20
Microp.
1/5A
(21)
21
10
R1
Display
1/5A
I1B
B2
2
1
34/38
23
24
B1
C
SS+
Keyboard
9 Pin Male
=
IM30T
A
B C
A
25
B C
A B C
25
25
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
R2
IM30T
1/5A
42
42
42
33
33
33
1/5A
Progr.
Int.fault
44
R1
R4
R2
5
15
17
R5
R3
R4
R5
16
RT
14
BIO
3
2
1
BIF
In = 1A
L/+ 12
IEC 255
˜
˜
˜
BT 2 50
F46
F49
F50
F51
F50N
F51N
F51BF
I2t = K
8 N.O.
18
20
N.C.
19
4
6
R3
Function
PRESA/TAP 31 Ion = 5A
PRESA/TAP 33 Ion = 1A
N/- 13
_
˜
˜
˜=
Keyboard
(21)
N.O.
11
22
N.C.
7
9 (10)
Microp.
1/5A
In = 5A
21
10
R1
Display
1/5A
C
SS+
34/38
23
24
9 Pin Male
20
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
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 co-ordination
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
Ordering Information
24-110 V AC/DC
88-264 V AC/DC
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 co-ordination
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
Functions available
Rating
Other features
Burden on CT
Burden on PT
Burden on aux. supply
Operating temp
Weight
Output contacts
Construction
Dim W x H x D in mm
Panel cutout
Auxiliary supply
21
Type 1
Type 2
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
24-110 V AC/DC
88-264 V AC/DC
Wiring Diagrams
MC20
A B C
A B C
Display
6
6
R1
16
7
7
R2
MC20
R1
F51
14
R4
1/5A
9
BT 2
Progr.
Int.fault
50
Output
Relays
R2
18
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
C
A (S+)
B (S+)
10
RS232
11
Output
Relays
Rele
DI Uscita
15
12
F51N
9
16
13
R2
F50N
8
8
R3
15
F50
1/5A
5
5
18
17
Funzioni
Functions
4
4
R1
Microp.
1/5A
3
2
1
C
Keyboard
Tastiera
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-)
Digital
Inputs
BPMC
MS - SCE 1828 - R1
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
1A
16
R1
16
R2
18
R2
18 Relays
17 Rele
14 DI Uscita
17 Output
Relays
14
Rele
15
DI Uscita
13
R3
R1
R4
R2
R3
12
20
21
19
22
D3
D2
1/5A
In=
R1
Microp.
R4
D1
Progr.
Int.fault
5A
Auxiliary Supply
11
RS232
Keyboard
Tastiera
BPMC
R3
15
20
21
19
22
D3
D2
D1
Incressi
Digital
A (S+)
B (S-)
3
2
1
MS-SCE1895-R2
Standard Output
13 Expansion
12 All Espansione
C
RS485
Digital
Input
Ingress
Digital
To I/0 Relay
L
H
C
10
Digital
Inputs
Output
A (S+)
B (S-)
3
2
1
DI I/0
Comune
Comune
RS485
MS -SCE1924-R2
I/O Output
22
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
Feeder manager relay
2
46, 49, 50/51, 67, 50N/51N, 67N, 27/59, 59UO, 74, 81, 86, 121, I t
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 = 1 A; 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
Functions available
Rating
Other features
Burden on CT
Burden on PT
Burden on aux. supply
Operating temp
Weight
Burden on aux.
Output contacts
Construction
Dim W x H x D in mm
Panel cutout
Auxiliary supply
23
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
Drawout
121 x 158 x 224
113 x 142
20-110 V AC / DC or
88-264 V AC / DC
Wiring Diagrams
FMR
A B C
2
A B C
2
25
28
R1
3
4
3
4
5
6
5
6
7
8
7
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.O
N.C
R3
25
R4
33
R1
POWER
R5
32
R2
TRIP
15
22
31
R3
R6
R4
ON
12
25
15 Digital
Inputs
25
19 Ingressi
38 Digitali
27
17
R5
D1
OFF
R6
48
D2
D3
D4
+
-
Auxiliary Supply
Alimentazione Ausiliaria
(25)
34
In = □ 1A □ 5A
lon = □ 1A □ 5A
Un = 230Vac Max.
24
35
R2
Trip
Oxi. sup.
11
16
21
H
L
Front-RS252
MS - SCE 1844-R3 BPU
34
37
ON
UM30A
25
A
R1
Display
26
Microp.
B
C
27
UM30A
28
39
29
Function
41
30
EA
Uo
UC
EC
UA
UB
˜
˜˜
BT 2 50
44
N/- 13
_
˜
˜
˜=
R3
F27 / 59
F27d / 59d
R1
F59s
F59U
F81
F59 / 81
R3
Progr.
Int. Fault
EB
L/+ 12
R2
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
80 (-20%) - 220 (+20%) Vac 90 (-20%) - 250 (+20%) Vdc
24
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
Description
Device code
Design
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
Functions available
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
Auxiliary supply
25
Type 1
Type 2
SPM21
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
Display of parameters,
MD recording & data logging
Built in self supervision,
RS485 port, event recording
RS485 port
NA
O.2 VA for 5 A, 0.01 VA for 1 A
0.04 VA
0.04 VA
100C to 600C
100C to 600C
< 2kg
< 2kg
8.5 VA
8.5 VA max
5 C/O
5 C/O
Drawout
Drawout
121 x 158 x 224
121 x 158 x 224
113 x 142
113 x 142
Ordering Information
20-110 V AC / DC or
20-110 V AC / DC
88-264 V AC / DC
88-264 V AC / DC
RRS
Generator load sharing
95
Static
Active / reactive power
Over power
Load sharing
Frequency control
110 V PT input
1 A / 5 A CT input
NA
< 5 VA
100C to 600C
< 1.5kg
8.5 VA
3 N/O
Drawout
71 x 158 x 224
62 x 142
20-110 V AC / DC or
88-264 V AC / DC
Upto 380 V AC 1 A / 5 A
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
-
12
R1
3
+
+
Increase
13
4
1
T
Settings
VOIOCOS
7
Operation
+
1
R2
6
2
OPTO
8
9
+
OPTO
+
-
Decrease
17
R3
Over Power
18
Lood Shedding
22
2
(.)
(.)
Freq. control
21 11 10
3
1
2
Lood
Shedding
3
Freq. control
Open
Open
Open
Open
Open
Open
Open
Open
Yes
Yes
Yes
Yes
Open
Close
Yes
No
26
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, trip count & 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
Description
Device code
Design
Functions available
Rating
Other features
UFD34
MC1V
MC3V
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
100-125 V
Display of parameters
Built in self supervision
Oscillogarphic recording of
input quantities
RS485 serial communication
port on back panel
Single phase voltage and
Frequency relay
27, 59, 81
Numeric
Two under voltage elements
Two over voltage elements
One under frequency element
One over frequency 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
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
Burden on CT
Burden on PT
Operating temp
Weight
Burden on auxiliary
Not applicable
0.04 VA
0
0
-10 C to 60 C
< 2.5kg
8.5 VA
4 C/O contacts + 1 C/O for
Output Contacts
self supervision
Construction
Drawout
Dim W x H x D in mm 121 x 164 x 224
Panel cutout
113 x 142
Auxiliary supply
27
20-110 V AC/DC or
88-264 V AC/DC
20-110 V AC/DC or
88-264 V AC/DC
Wiring Diagrams
UFD34
25
A
26
28
39
29
C
Function
F81 - 1
41
30
R2
F81 - 3
F81 - 4
R3
Fdf / dt
F27 / 59
R4
Progr.
Int. Fault
IEC 255
N/- 13
_
˜
˜
˜
R3
8
18
20
R4
19
4
6
R5
5
15
17
R1
F81 - 2
L/+ 12
R2
UFD34
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
11
C
C
A (S+)
B (S-)
RS232
3
2
1
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
Digital
Inputs
22
19 Ingressi
Digitali
22
D1
10
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
15
13
D3
20
D2
21
Digital
Inputs
D1
19
22
Ingressi
Digitali
UA
Progr.
EC
17
14
F59
EA
UC
18
R3
F24
8
C
R2
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
MS - SCE 1835 - R1
I/O Output
28
MD32TM
29
MD32G
MG30/
MG30I
scheme - 2
scheme - 1
MPR300
MC61A/MC61C
MC12/ME12
SC14S
G2
UFD34, UM30
G1
MRP11
MV12
SPM21
SCM21
MV12/MC3V
MC31A/MC61A
MC61C/FMR
MC61A/
MC61C
MV12/MC3V
scheme - 1
Motor
scheme - 2
Motor
MM30/
MCOMP
etaCON L /
RPM8 / RPM14
APFC Panel
Schematic - Relay Application
1.12
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