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ABB MOTOR PROTECTION AND CONTROL 3/301

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Auxiliary contact blocks for AF116 ... AF2850 contactors
Electrical durability

Electrical durability for AC-15 utilization category 03
AC-15 utilization category according to IEC 60947-5-1 / EN 60947-5-1:
• making current: 10 x Ie with cos ϕ = 0.7 and Ue
• breaking current: Ie with cos ϕ = 0.4 and Ue.
This curves represent the electrical durability of the add-on auxiliary contacts, in relation to the breaking current.
The curves have been drawn for resistive and inductive loads up to 690 V, 40...60 Hz.

30 • AF116 ... AF2850 contactors auxiliary contacts
20 • 2-pole CAL18 and CAL19 add-on auxiliary contacts
10
Example:
5 3 2 Breaking current = 1.2 A
Million operating cycles 0.5 1 On the opposite curve at intersection "O" 1.2 A the
2.7
corresponding value for the electrical durability is approxi-
mately 2.7 millions operating cycles.
0.3
0.2
0.1
0.02 0.05 0.1 0.2 0.3 0.5 1 1.2 2 3 45 6 10
Breaking current (A)