AIR CIRCUIT BREAKERS - Electrical and Electronics Division

8
Sr.
No.
1 1 0.75 2.1 1.21 0.9 - 1.5 MN9 MN9 MN9 4
2 1.5 1.1 2.7 1.6 1.4 - 2.3 MN9 MN9 MN9 6
3 2 1.5 3.5 2.02 1.4 - 2.3 MN9 MN9 MN9 6
4 3 2.25 5 2.88 2 - 3.3 MN9 MN9 MN9 8
5 4 3 6.4 3.7 3 - 5 MN9 MN9 MN9 10
6 5 3.75 7.9 4.6 3 - 5 MN9 MN9 MN9 16
7 6 4.5 9 5.2 4.5 - 7.5 MN9 MN9 MN9 16
8 7.5 5.5 11.2 6.5 4.5 - 7.5 MN9 MN9 MN9 20
9 10 7.5 14.8 8.54 6 - 10 MN9 MN9 MN9 20
10 12.5 9.3 19 11 9 - 15 MN9 MN12 MN12 32
11 15 11 22 12.7 9 - 15 MN12 MN16 MN16 32
12 20 15 29 16.7 14 - 23 MN12 MN25 MN25 40
13 25 18.5 35 20.2 14 - 23 MN16 MN25 MN25 50
14 30 22.5 40 23 20 - 33 MN16 MN25 MN25 63
15 35 26 47 27 20 - 33 MN25 MN32 MN32 63
16 40 30 55 31.8 30 - 50 MN25 MN32 MN32 63
17 45 33.5 60 34.6 30 - 50 MN32 MN45 MN45 80
18 50 37.5 66 38.2 30 - 50 MN32 MN45 MN45 80
19 60 45 80 46.2 30 - 50 MN45 MN65 MN65 100
20 65 48.5 87 50 45 - 75 MN45 MN65 MN65 100
21 70 52 94 54.2 45 - 75 MN45 MN65 MN65 125
22 75 55 100 57.5 45 - 75 MN45 MN80 MN80 125
23 90 67.5 120 69.2 45 - 75 MN80 MN80 MN80 160
24 100 75 135 77.9 66 - 110 MN80 MN95 MN95 160
25 125 90 165 95 66 - 110 MN80 MN140 MN140 200
26 150 110 200 115 90 - 150 MN95 MN140 MN140 250
27 175 130 230 132.8 90 - 150 MN110 MN185 MN185 250
28 200 150 275 159 135 - 225 MN140 MN265 MN265 315
29 240 175 310 178.9 135 - 225 MN140 MN265 MN265 400
30 250 185 325 187 135 - 225 MN140 MN265 MN265 400
31 275 204 360 208 135 - 225 MN265 MN265 MN265 400
32 300 225 385 222 180 - 300 MN265 MN265 MN265 500
33 400 300 500 288.6 180 - 300 MN265 MN325 MN325 500
8/28
SELECTION CHART �OR STAR DELTA STARTERS
MN Relays and MN Contactors
(Type “2” Co-ordination, IS13947(Part4/Sec1)/IEC 60947-4-1)
Motor Current at 415V
HP kW Line Phase
Relay Range
A
Star
Contactor
Line Delta
HRC Back-up �use
Rating,A