Page 610 - Motor_protection_and_control_Manual_motor_starters_ contactors

Auxiliary contacts

Electrical durability

Electrical Durability for AC-15 Utilization Category
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 curve represents the electrical durability of the auxiliary contacts in relation to the breaking current.
The curve has been drawn for resistive and inductive loads up to 690 V, 40...60 Hz.

30
20
10
5 3
Million operating cycles 0.5
5 2 1

0.3
0.2
0.1
0.02 0.05 0.1 0.2 0.3 0.5 1 2 3 45 6 10
Breaking current (A)
2-pole CAL16... and CCL16... auxiliary contact blocks

Electrical Durability for DC-13 Utilization Category
DC-13 utilization category according to IEC 60947-5-1 / EN 60947-5-1:
– making and breaking current = Ie with Ue value.

Example:
100 Control of d.c. electro-magnet: Ue voltage = 72 V d.c. and
70 1.10 cycles breaking power = 70 W.
6
50
On the opposite curve at intersection "O" 72 V / 70 W the
6
3.10 cycles correspon-ding value for the electrical durability is approxi-
Breaking power (W) 10 5 10.10 cycles mately 2.10 cycles.
20
6
6
2
1
10 20 24 50 72 100 200 250 500
Voltage (V)
2-pole CAL16... and CCL16... auxiliary contact blocks

1SBC101657S0201

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