Page 552 - Motor_protection_and_control_Manual_motor_starters_ contactors

Auxiliary contact blocks for AF09 ... AF96 contactors and

NF contactor relays
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.
These curves represent the electrical durability of the built-in or 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 – AF09 ... AF96 contactor built-in auxiliary contacts
20
– 1-pole and 4-pole CA4, 2-pole CAT4,
10
1-pole CC4,
5 3 2-pole CAL4 add-on auxiliary contacts.
Million operating cycles 0.5 1 Breaking current = 1 A
5 2 Example:

On the opposite curve at intersection "O" 1 A the
0.3
0.2
mately 2 millions operating cycles.
0.1 corresponding value for the electrical durability is approxi-
0.02 0.05 0.1 0.2 0.3 0.5 1 2 3 4 5 6 10
Breaking current (A)

30 NF contactor relays.
20
(For add on auxiliary contacts see curve above).
10
5 3 2
Million operating cycles 0.5 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)

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 and Ue.

– AF09 ... AF96 contactor built-in auxiliary contacts
100 1-pole and 4-pole CA4, 2-pole CAT4, 1-pole CC4,
70 1.10 cycles – 2-pole CAL4 add-on auxiliary contacts,
6
50
– NF contactor relays.
6
3.10 cycles
Breaking power (W) 10 5 10.10 cycles Example:
20
6
Control of DC electro-magnet:
Ue voltage = 72 V DC and breaking power = 70 W.
On the opposite curve at intersection "O" 72 V / 70 W the
2
corresponding value for the electrical durability is approxi-
1
10 20 24 50 72 100 200 250 500 mately 2 millions operating cycles.
Voltage (V) 1SBC101641S0201 - Rev. A

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