Page 153 - Motor protection and control Manual motor starters, contactors and overload relays

ABB MOTOR PROTECTION AND CONTROL 3/79

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3-pole contactors
Electrical durability

Electrical durability for AC-2 or AC-4 utilization category - 440 V < Ue ≤ 690 V 03
Ambient temperature ≤ 60 °C for AF09 ... AF370, ≤ 55 °C for AF400 ... AF750
Switching cage motors: starting, reverse operation and step-by-step operation. The breaking current Ic is equal to 2.5 x Ie
for AC-2 and 6 x Ie for AC-4, keaping in mind tha Ie is the motor rated operational current (Ie = motor full load current). Maxi-
mum electrical switching frequency: see "Technical data".

Millions of
operating AF116
cycles AF140 AF190 AF205 AF400
AF146
AF750 *
AF09 AF12 AF16 AF26 AF30 AF38 AF40 AF52 AF65 AF80, AF96 AF265 AF305 AF370 AF460 AF580 *
10

5

3
2 9
7
5
3
1 1

0.5
0.3
0.2 9
7
5
3
0.1 1
0.05

0.03
0.02 9
7
5
3
0.01 1 1 3 5 7 9
1 3 5 7 9 1 3 5 7 9 1 3 5 7 9
0.005
2 3 5 10 20 30 50 100 200 300 500 1000 2000 3000 5000
Breaking current Ic (A)

Note: * For AF580 and AF750 contacts needs to be replaced after 750k operations.

1SBC101943S0201