Page 351 - Motor_protection_and_control_Manual_motor_starters_ contactors

3-pole contactors

Electrical durability

Electrical durability for AC-3 utilization category - Ue ≤ 440 V.
Switching cage motors: starting and switching off running motors. The breaking current Ic for AC-3 is equal to the rated opera-
tional current Ie (Ie = motor full load current).
Ambient temperature and maximum electrical switching frequency: see "Technical data".

Millions of AF1350, AF1650:
The electrical durability at
operating AF30, AF38 AF80, AF96 AF140, AF146 the rated current is 50000
cycles AF09 AF12 AF16 AF26 AF40 AF52 AF65 AF116 AF190 AF205 AF265 AF305 AF370 AF400 AF460 AF580 AF750 operating cycles.
10

5

5
3 9
7
5
3
2 9 1
1.8 7
5
3
1 1

0.5

13 57 9 13 57 9 15 9 13 57 9
0.3
13 57 9
1 3 5 7 9 15 9 1 3 5 7 9
0.2
2 3 5 10 20 30 50 100 200 300 500 1000
55 Breaking current Ic (A)
Example:
Motor power 30 kW for AC-3 - Ue = 400 V and Ie = 55 A utilization – Electrical durability required = 1.8 million operating cycles.
For AC-3: Ic = Ie. Select the AF65 contactor at intersection " " (55 A / 1.8 million operating cycles) on the curves (AC-3 - Ue ≤ 440 V).

1SBC101941S0201

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