1SFL451001R8411

The A110-30-11-84 Block contactor with add-on auxiliary contact blocks for front or side mounting is a control product from ABB's range of low voltage products and systems with a wide range of accessories. A‑line contactors are mainly used for controlling 3‑phase motors and for controlling power circuits corresponding to their operating characteristics up to 690 and even 1000 VAC and 440 VDC. A variety of accessories are available for top or side‑mount versions. Depending on the severity of the application contact inspection may be required. A typical severe application would involve frequent making and breaking of high currents, reversing and inching (AC4). Premature service on contactors will increase the overall cost while delayed service could cause costly interruptions or breakdowns. Service at the right time will avoid these kind of problems. A voltage drop to less than 85 % of nominal voltage for 5 to 10 ms can be enough for the contactor to start opening. Also, other disturbances in the control voltage such as poor relay contacts or too small control transformer/power supply could be responsible for this problem. These voltage problems can result in increased contact wear and also lead to welding of main contacts. With the AF technology these problems can be avoided.

• The A110-30-11-84 is a 3-pole AC-operated block contactor used for controlling 3-phase motors and power circuits with a wide range of accessories
• A-Line contactors are mainly used for controlling 3-phase motors and for controlling power circuits corresponding to their operating characteristics
• All A-Line contactors can be assembled side by side. The add-on or built-in auxiliary contacts are suitable for low-level currents
• Basically the A110-30-11-84 Block Contactor is considered maintenance free, but for technical reasons there may be a need to change certain parts

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Industrial, Motor Drive & Control