motor starters type mn - nahar enterprise -...
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Motor Starters Type MNDirect-On-Line Starters Star-Delta Starters
About us
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.
Switchgear Factory, Mumbai
Switchgear Factory, Ahmednagar
MN starters are available in following versions:
l
lFully automatic Star-Delta (FASD) starter
All MN DOL & Star-Delta starters are suitable for 3-Phase Squirrel Cage motors. MN DOL starters are available in following ratings:
lMN 16 DOL-upto 10 HP (7.5kW)lMN 25 DOL-upto 15 HP (11kW)lMN 32 DOL-upto 20 HP (15kW)lMN 45 DOL-upto 30 HP (22.5kW)lMN 65 DOL-upto 45 HP (33.5kW)
MN Star-Delta starters are available in following ratings:
lMN 16 Star-Delta-upto 15 HP (11kW)lMN 25 Star-Delta-upto 25 HP (18.5kW)lMN 32 Star-Delta-upto 35 HP (26kW)lMN 45 Star-Delta-upto 50 HP (37.5kW)lMN 65 Star-Delta-upto 75 HP (55kW)lMN 80 Star-Delta-upto 90 HP (67.5kW)lMN 110 Star-Delta-upto 125 HP (90kW)lMN 140 Star-Delta-upto 175 HP (130kW)
Direct-On-Line starter
Applications
Construction
MN starters consist of MNX contactors & MN relays. The relay is directly mounted on the contactor. The colour of the sheet steel enclosure is two-toned. The box is powder coated and grey in colour. The cover is powder coated with ivory colour. The push button is flush mounted in an enclosure cover, which has been given an altogether ‘new look’.
l
lBuilt-in single phasing protectionlIn Star Delta Starters, Star contactor has same
rating as Hold-on & DeltalSuitable for Industrial & Rural applicationslTerminal block for ease of termination
0lStarter enclosure with IP54 of protection
Conforms to IS/IEC 60947-4-1 & IEC 60947-4-1
Salient Features Operational Details
Relay SettingA screwdriver is used to set the relay indicator (which is on the dial) to the full load current setting. This ensures optimum protection under Overload and Single Phasing of the motor. In case of Star-Delta Starters, the relay must be set at the values In / 3 (0.58 In) as given in the selection table, since the connected relay carries only the phase current in Motors having Delta connected winding.
MN DOL Startersl
type MNX contactorslMN 16, 25, 32 DOL starters incorporate MN 2
relayslMN 45, 65 DOL starters incorporate MN 5 relays
MN 16, 25, 32, 45, 65 DOL starters incorporate
MN Star-Delta StartersMN Star-Delta Starters are available only in fully automatic version.
MN 16, 25, 32, 45, 65, 80, 110, 140 Star-Deltastarters incorporate type MNX contactors.
lMN 16, 25, 32, Star-Delta starters incorporateMN 2 relays
lMN 45, 65, 80, 110, Star-Delta startersincorporate MN 5 relays
lMN 140 Star-Delta starters incorporate MN 12L relays
In case of FASD starter, motor gets connected in Star connection, when the green button is pressed. An electronic timer automatically performs the change-over function from Star to Delta.
1
Features & Benefits
Single Phasing Protection
MN relays having phase failure sensitive tripping mechanism provides reliable protection against single phasing & overload conditions. MN relays are compensated for variation in
Oambient temperature from -5 C to O55 C.
MN Star-Delta starters are provided with terminal block with proper terminal marking for ease of wiring. Terminal block can accommodate both aluminum & copper cables.
Corrosion resistant powder coatedenclosure with IP 54 degree of protection makes MN starters most suitable for chemical factories, polluted industrial and dustyagricultural environments.
IP54 degree of protection
Terminal Block
Base Plate Mounting
MN Star-Delta starters are mounted on base plate that can absorb vibrations and it makes MN starters maintenance friendly.
MN Fully Automatic Star-Delta starters are provided with electronic timer for high repeat accuracy.
This facility enables the user to manually check the operation of the trip mechanism. Move the trip slide in the direction shown on the relay. The relay trips with an audible ‘Click’ sound, indicating that the trip mechanism is in good working order.
The relay will trip in case of overloads or single phasing conditions.
Electronic Timer
Trip Test Facility
Off / Reset Push-Button
Simultaneously ‘Alarm Contact’ (97-98) will close. The motor cannot be restarted until the relay has been reset. To reset the relay, allow the bimetals to cool down sufficiently & push this button to reset the trip contact (95-96).
If the relay is in reset condition, pressing this push-button will open ‘Trip Contact’. But now the alarm contact will not close. This indicates healthy operation of the relay mechanism. The trip contact will again close when this button is released.
There are two modes of reset available : Manual and Auto. By default the relay is in the Manual reset mode and can be converted to Auto reset mode by moving the switch to Auto position marked on the label.
Auto-Manual Reset Switch
Earthing screw withproper marking
Two-tone colourcombinations with box in steel grey & cover in ivory
Better corrosion resistancethrough powder coated
enclosure
Flush-mountedpush buttons
IP54 Protection class of enclosuremakes it suitable for industrial and rural applications
Different sized holes with grommetsat top & bottom for various cable sizes
2
3
HF
HF
HF
HF
HF
HF
HN/00
HN/00
HN/00
HN/00
HN/00
HN/00
HN/00
HN/00
HN/0
HN/0
HN/0
HN/1
HN/1
FN 32
FN 32
FN 32
FN 63
FN 63
FN 63
FN 100
FN 100
FN 100
FN 100
FN 100
FN 100
FN 125
FN 125
Fn 200
FN 200
FN 200
FN 250
FN 250
10
12.5
15
20
25
30
35
40
45
50
60
65
70
75
90
100
125
150
175
7.5
9.3
11
15
18.5
22.5
26
30
33.5
37.5
45
48.5
52
55
67.5
75
90
110
130
14
18
21
28
35
40
47
55
60
66
80
87
94
100
120
135
165
200
230
8.08
10.4
12.1
16.2
20.2
23
27
31.8
34.6
38.2
46.2
50
54.5
57.5
69.2
77.9
95
115
132.8
6 - 10
9 - 15
9 - 15
14 - 23
14 - 23
20 - 33
20 - 33
30 - 50
30 - 50
30 - 50
45 - 75
45 - 75
45 - 75
45 - 75
45 - 75
66 - 110
66 - 110
90 - 150
90 - 150
20
32
32
40
50
63
63
63
80
80
100
100
125
125
160
160
200
250
250
MN 32 FASD
MN 25
MN 16 FASD
MN 2
MN 2
MNX 18
MNX 25
MNX 32
MN 2
MNX 45MN 45 FASD MN 5
MNX 70MN 65 FASD
MN 5
MN 5MN 80FASD MNX 80
MN 5MN 110 FASD
MN 140FASD
MN 12L
MNX 110
MNX 140
Selection Chart for MN Star-Delta Starters
PhaseCurrent
i / 3n
Chart for MN DOL starters
Chart for MN Star-Delta startersSelection Chart for MN DOL Starters
TypeMaximum Motor Rating
at 415V, 3 Ø, 50Hz
HP kW
Approx. Full Load
Current In (A)
RelayRange
(A)Relay Contactor
RecommendedBack-up HRC Fuse
Type Rating (A)
SwitchDisconnector
Fuse Unit
2
2.5
3
4
5
6
7.5
10
7.5
10
12.5
15
15
17.5
20
25
30
30
35
40
45
1.5
1.8
2.2
3
3.7
4.5
5.5
7.5
5.5
7.5
9.3
11
11
13
15
18.5
22.5
22.5
26
30
33.5
3.5
4.8
5
6.2
7.5
9
11
14
11
14
18
21
21
24
28
35
40
40
47
55
60
3 - 5
3 - 5
4.5 - 7.5
4.5 - 7.5
6 - 10
6 - 10
9 - 15
9 - 15
9 - 15
9 - 15
14 - 23
14 - 23
20 - 33
20 - 33
20 - 33
30 - 50
30 - 50
30 - 50
30 - 50
45 - 75
45 - 75
HF
HF
HF
HF
HF
HF
HF
HF
HF
HF
HF
HF
HF
HF
HN/100
HN/100
HN/100
HN/100
HN/100
HN/100
HN/100
16
16
16
20
20
25
32
32
32
32
50
63
63
63
63
80
80
80
100
100
100
FN 32
FN 32
FN 32
FN 32
FN 32
FN 32
FN 32
FN 32
FN 32
FN 32
FN 63
FN 63
FN 63
FN 63
FN 100
FN 100
FN 100
FN 100
FN 100
FN 100
FN 100
Type
MN 16DOL
MN 25DOL
MN 32DOL
MN 45DOL
MN 65DOL
MN 2
MN 2
MN 2
MN 5
MN 5
MNX 18
MNX 25
MNX 32
MNX 45
MNX 70
Maximum Motor Ratingat 415V, 3 Ø, 50Hz
HP kW
Approx. Full Load
Current In (A)
RelayRange
(A)Relay Contactor
RecommendedBack-up HRC Fuse
Type Rating (A)
SwitchDisconnector
Fuse Unit
Ordering Information - MN DOL Starter*Example: MN 16 DOL - 240V with relay range 9-15 A Ordering Information - SS94015BOBO
Ordering Information - MN Star- Delta Starter*Example: MN 16 SASD - 360V with relay range 9-15 A Ordering Information - SS94019COBO
* Note: These are the standard combinations of relay and contactor. Any other combinations can be supplied on request.
4
Starter Type
Cat. No.
Rated controlvoltage (Us) VAC
Version
Relay Range
MN 16 MN 25 MN 32 MN 45 MN 65
SS94351 SS94352 SS94353 SS94017 SS94018
2.0 - 3.3
3.0 - 5.0
4.5 - 7.5
6.0 - 10
9.0 - 15
14 - 23
20 - 33
30 - 50
45 - 75
DOQO
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
BOEO
—
—
—
—
—
—
BOBO
BODO
—
—
—
—
240
360
415
3.0 - 5.0
4.5 - 7.5
6.0 - 10
9.0 - 15
14 - 23
20 - 33
30 - 50
45 - 75
—
—
—
—
—
—
—
COJO
—
—
—
—
—
COEO
—
—
—
—
—
—
—
—
COGO
—
—
—
—
COBO
CODO
—
—
—
COSO
COUO
COVO
COBO
—
—
—
—
3.0 - 5.0
4.5 - 7.5
6.0 - 10
9.0 - 15
14 - 23
20 - 33
30 - 50
45 - 75
DOSO
DOUO
DOVO
DOBO
—
—
—
—
—
—
—
DOBO
DODO
—
—
—
—
—
—
—
DODO
DOEO
—
—
—
—
—
—
—
—
DOGO
—
—
—
—
—
—
—
DOGO
DOJO
Relay Range
6.0 - 10
9.0 - 15
14 - 23
20 - 33
30 - 50
45 - 75
66 - 110
90 - 150
6.0 - 10
9.0 - 15
14 - 23
20 - 33
30 - 50
45 - 75
66 - 110
90 - 150
Version
SS94362 SS94366S 94364S SS94021 SS94022 SS94705 SS94706 SS94707Cat. No. FASD
Starter Type
Rated controlvoltage (Us) VAC
MN 80 MN 110 MN 140MN 16 MN 25 MN 32 MN 45 MN 65
360
415
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
DODO
COEO
—
—
—
—
—
—
CODO
—
—
—
—
—
COVO
COBO
—
—
—
—
—
—
DOVO
DOBO
—
—
—
—
—
—
—
—
DODO
—
—
—
—
—
—
—
—
DOEO
—
—
—
—
—
—
—
—
DOGO
—
—
—
—
—
—
—
—
DOJO
—
—
—
—
—
—
—
DOJO
—
—
—
—
—
—
—
—
DOKO
—
—
—
—
—
—
—
—
DOMO
Overall Dimensions
DOL StartersMN 16, MN 25, MN 32
139
105
21
9
18
54 mounting holes Ø 6
128 2.3
DOL Starters MN 45, MN 65
200 142
25
2
32
4
146 4 mounting holes Ø 8.5
Ø26
3526
49
57
7
153
Ø38 297
Ø 26
4 mounting holes 8.5Ø
FASD Starters MN 45, MN 65
453
43
01
47
.5
483
519
2 holes Ø34 4 mounting holes Ø 11
21
8.9 FASD Starters
MN 80F, MN 110F, MN 140F
72
5
212.6
235 136
43
0
37
5
34Ø 188 4 mounting holes Ø 8.5
Ø26 FASD StartersMN 16, MN 25, MN 32
5
2 holes Ø39
Ø38
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