ML Series Contactor & Thermal

Overload Relay
Technical Data
Contactors
Type ML 1.5 ML 2 ML 3 ML 4 ML 6 ML 10 ML 12
Cat. No. SS91851 SS90701 SS90721 SS90910 SS90921 SS90935 SS91010
Conformance Standards IS 13947- 4 - 1, IEC 60947 - 4 - 1
No. of poles 3 3 3 3 3 3 3
Thermal rating / Utilization category AC-1 : 3 Ø, 415V, 50Hz* 25 A 40 A 45 A 100 A 125 A 250 A 400 A
Insulation voltage , Ui (V) 500 500 500 660 660 660 660
Utilization Category AC-2 25 A 32 A 40 A 70 A 110 A 200 A 300 A
Motor duty 3Ø, 415V, 50Hz Utilization Category AC-3 11 kW/15hp/25 A 15 kW/20hp/32 A 22 kW/30hp/40 A 37 kW/50hp/70 A 55 kW/75hp/110 A 110 kW/150hp/200 A 168 kW/225hp/300 A
Utilization Category AC-4 9 kW/12.5hp/21 A 15 kW/20hp/32 A 22 kW/30hp/40 A 37 kW/50hp/70 A 45 kW/60hp/85 A 110 kW/150hp/200 A 140 kW/190hp/250 A
Operational Current le (AC-4 Utilization Category)
13.5 A 17 A 22 A 35 A 46 A 90 A 112 A
For contact life of 300000 Operating cycles
20% 37 A 48 A 60 A 95 A 165 A 250 A 375 A
I) Stator duty - 415V, 50Hz
40% 37 A 48 A 60 A 95 A 165 A 250 A 375 A
Duty factor (10 min. cycle duration)
60% 30 A 40 A 50 A 78 A 135 A 206 A 310 A
20% 56 A 72 A 90 A 157 A 270 A 370 A 560 A
Il) Rotor duty - Delta connected
40% 56 A 72 A 90 A 157 A 270 A 370 A 560 A
Duty factor (10 min. cycle duration)
60% 44 A 60 A 75 A 118 A 206 A 310 A 465 A
Starting 830V 830V 830V 830V 830V 830V 830V
lll) Max. Rotor Voltage
Plugging 415V 415V 415V 415V 415V 415V 415V
(10 min. cycle duration)
Speed control 500V 500V 500V 500V 500V 500V 500V
Capacitor Switching - Delta connected, 415V, 50Hz *** Single Capacitor 13 kVAr 20 kVAr 20 kVAr 50 kVAr 65 kVAr 125 kVAr 175 kVAr
Making Capacity at 457 V, Cos Ø - 0.35, 50Hz 252 A 400 A 480 A 840 A 1200 A 2500 A 3000 A
Breaking Capacity at 457 V, Cos Ø - 0.35, 50Hz 210 A 320 A 400 A 700 A 1000 A 2000 A 2500 A
DC 1 - 110V 25 A 32 A 40 A 63 A 85 A 200 A 300 A
DC 1 - 220V 25 A 32 A 40 A 63 A 85 A 200 A 300 A
DC rating (with 3 poles in series) and DC 3 - 110V 25 A 32 A 40 A 63 A 85 A 200 A 300 A
AC coil operation DC 3 - 220V 10 A 32 A 40 A 63 A 63 A 200 A 300 A
DC 5 - 110V 25 A 32 A 40 A 63 A 85 A 200 A 300 A
DC 5 - 220V 7.5 A 32 A 40 A 63 A 63 A 200 A 300 A
Mechanical life : No of operating cycles 15 x 106 10 x 106 10 x 106 10 x 106 10 x 106 10 x 106 10 x 106
Mechanical 3000 2000 2000 1200 1200 1200 1200
Utilization Category AC-1 3000 750 750 1000 750 750 750
Max. Frequency of operation :
Utilization Category AC-2 750 750 750 500 500 500 500
Operating cycles/hr
Utilization Category AC-3 750 750 750 750 750 500 500
Utilization Category AC-4 250 250 250 250 250 250 250
Service temperature -20oC to + 55oC -20oC to + 55oC -20oC to + 55oC -20oC to + 55oC -20oC to + 55oC -20oC to + 55oC -20oC to + 55oC
Wires up to (in mm)2 2 x 10 2 x 25 2 x 25 - - - -
Main terminal capacity
Lugs up to (in mm)2 16 50 50 50 95 240 240
Auxiliary Contacts
No. of built in auxiliary contacts 2 NO + 2 NC 2 NO + 2 NC 2 NO + 2 NC 2 NO + 2 NC** 2 NO + 2 NC** 2 NO + 2 NC* 2 NO + 2 NC*
Operating Sequence Break Before Make
Thermal Rating at 415V, 50Hz 16 A 16 A 16 A 16 A 16 A 16 A 16 A
Aux. Terminal Capacity : Wires up to (in mm)2 2 x 2.5 2 x 2.5 2 x 2.5 2 x 2.5 2 x 2.5 2 x 2.5 2 x 2.5
AC-15 Rating at 415V, 50Hz 4A 4A 4A 4A 4A 4A 4A
Making Capacity at 415V, Cos Ø - 0.35, 50Hz 80 A 80 A 80 A 80 A 80 A 80 A 80 A
Breaking Capacity at 415V, Cos Ø - 0.35 Ø, 50Hz 70 A 70 A 70 A 70 A 70 A 70 A 70 A
Coil
12, 24, 42, 110, 220/230, 240/250 42, 110, 220, 240 110, 220 110, 220, 240
Voltages Available for 50Hz operation , Uc (V)
320, 360, 380, 415/440, 525 320, 360, 380, 415/440, 525 240, 415, 525 380, 415, 525
VA 60 120 120 450 4500 1450 1450
Pick - up
Cos Ø 0.8 0.4 0.4 0.3 0.3 0.25 0.25
VA 15 20 20 50 50 85 85
Hold on 5 8.5 8.5 17 17 27 27
Watts
Pick - up (% Uc) 75 - 110 75 - 110 75 - 110 75 - 110 75 - 110 75 - 110 75 - 110
Limits of operation
Drop - off (% Uc) 65 - 15 65 - 15 65 - 15 65 - 15 65 - 15 65 - 15 65 - 15
Typical closing delay in msec 5 - 35 10 - 35 10 - 35 10 - 35 10 - 35 15 - 45 15 - 45
Typical opening delay in msec 5 - 20 5 - 25 5 - 25 10 - 40 10 - 40 5 - 25 5 - 25
Weight (unpacked) in kg. 0.5 0.95 0.95 2.9 3 9.0 9.2
 Thermal Overload Relay

Type ML 1.5 ML 2/3

Cat. No. SS91858 SS91859
Rated insulation voltage (Ui) V 500 500
Rated impluse strength (Uimp) 6 6
0
Service temperature C -5 to + 55 -5 to + 55

Rated thermal current lth A 6 6

at 415V, 50Hz

24 V 6 6
110 V 5 5
Rated operational current for AC-15
utilization category at 50Hz (A) 220 V 3 3
380/415V 2 2
500 V 2 2
1 Start 1 Start
Built in contacts 1 Off / Reset 1 Off / Reset
1 Alarm (NO) 1 Alarm (NO)

Tripping class (A) 10 10

Max. Frequency of operation Op. cycles/hr 30 30
2
Main Terminal capacity Lug (mm ) 16 50
2
Aux. Terminal capacity Wires (mm ) 2 x 2.5 2 x 2.5

Accessories & Spares

Contactor Type AUX.ADD ON Block Spare Coil Spare Kit

ML 1.5 Not Available SS90873 SS95305

ML 2 SS95307
Not Available SS90545
ML 3 SS95309

ML 4 SS95311
SS91494 SS91258
ML 6 SS95313

ML 10 SS95315
SS91474 SS91011
ML 12 SS95317
 Overall Dimensions
ML1.5 Contactor (Without shroud)
FIXING SCREWS
M4 x 14 - 3 NOS.
85.5
73
3.5
54 50.7

4.8
66
56
44

24.75

24.75

ML 4 Contactor

FIXING SCREWS
M6 x 28 - 3 NOS.

38 38
136 22 MIN
38
120

124

142

110* 95

*Provide 12 mm extra for each Add-on block

 Overall Dimensions
ML 2/3 Contactor

FIXING SCREWS
M4 x 14 - 3 NOS

33 33

115

110
88

33 77
94

ML 6 Contactor

FIXING SCREWS
M6 x 28 - 3 NOS.

41.5 41.5 136 22 MIN

38 19
120

152
134

110* 95

*Provide 12 mm extra for each Add-on block

 Overall Dimensions
ML 10 / 12 Contactor
142 10
M 10 60
137 3 MOUNTING HOLES

205

176
170
60 60
197 170
194

2 NO + 2 NC ( BASIC VERSION )
223 ( 4 NO + 4 NC )

ML 0/1/1.5 Thermal Overload Relay ML 2/3

2.55 30

17.75 21.7 21.7 29 29 26

12

12
61.5

33 33 18
17.25 24.75 24.75 102
84
39.5

81.5
20

36.8
11
32

41

5.5
36

21.5

62
91*.*
5.5

49.7
93.5*

TERMINAL SCREWS M4 TERMINAL SCREWS M4