Page 78 - Motor protection and control Manual motor starters, contactors and overload relays

3/4 ABB MOTOR PROTECTION AND CONTROL

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AF technology

Main Benefits

03

Conventional AC coil

Energy

AF coil 80%
Reduced coil consumption

Time
Reliable in all networks Reduced coil consumption
The electronic system within the AF contactor continuously AF coil and energy consumption is reduced up to 80%.
monitor the current and voltage apply to the coil. The con- This allows a reduction of the temperature rise, the size
tactor is safely operated in an always optimized condition of control transformers and size of cabinets.
and hum free.

AF coil

275 V Conventional coil
+ 10 %
250 V 253 V
+ 10 %
230 V
220 V
- 15 %
187 V
165 V
+ 10 % UC max according to IEC
Coil nominal voltage
-15 % uc min according to IEC

100 V Uncertain drop zone
- 5 %
85 V

Safe holding zone

✓
60 V 60 V

Wide control voltage range Built-in surge suppression
With conventional contactor technology, different contac- With conventional contactor technology, it is recommended
tors are needed for different network voltages. Thanks to to use an external surge suppressor, an accessory that could
the wide operating range of the AF contactor, it can operate cost as much as half of the contactor. With the AF technol-
just as well in Europe as in Asia or North America. The core ogy, the surges are handled by the contactor and never reach 1SBC100202S0201 - Rev. A
coil of the AF contactor range covers 100-250 V AC / DC, the control circuit. One less product and one less complica-
50 / 60 Hz. tion to worry about.