OUR PRODUCTS
Contactors
Source genuine ABB AF contactors and overload relays from Hagar, supported by local South African stockholding.
ABB AF contactors use electronically controlled coil technology to provide reliable switching even during voltage fluctuations, while reducing coil energy consumption by up to 80% compared with conventional contactor coils. They are ideally suited to motor control, automation machinery, pumps, compressors and general industrial switching applications.
ABB AF contactors can interface with PLC and control outputs through pluggable interface relays and can be coordinated with Moulded Case Circuit Breakers (MCCBs) and overload protection for complete motor control solutions.
Product Overview
ABB AF Contactor Series (3-Pole & 4-Pole): Features electronic coils that operate smoothly across wide AC/DC voltage windows, cutting holding power consumption by up to 80% and eliminating coil hum.
ABB Mini Contactors: Compact switching modules designed for space-restricted enclosures requiring high mechanical switching frequency.
ABB TF & EF Overload Relays: Bimetallic (TF) and electronic (EF) overload relays that mount directly beneath contactors to safeguard electric motors against phase loss and thermal burnout.
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Frequently Asked Questions
How do ABB AF contactors reduce panel energy consumption?
ABB AF contactors feature electronically controlled coils that accept both AC and DC voltages across wide fluctuations. This advanced coil design slashes holding power consumption by up to 80% compared to conventional contactors, shrinks panel heat dissipation, and completely eliminates contact chattering caused by voltage drops
What is the difference between thermal and electronic overload relays for motor protection?
Thermal overload relays use bimetallic strips to monitor heat accumulation and are perfect for standard, predictable motor loads. Electronic overload relays (like the ABB EF range) use current transformers to sample motor current digitally, offering faster reaction times, phase-failure protection, and a much wider current adjustment range.
How do I choose between a 3-pole and a 4-pole ABB contactor?
Use a 3-pole contactor for standard three-phase motor applications where only the three live phases need to be switched. Choose a 4-pole contactor when your system configuration requires the neutral line to be safely isolated alongside the three phases, which is common in standby generator transfers and specific mains distribution panels.
What is Type 2 coordination for motor starters, and how does ABB achieve it?
Type 2 coordination ensures that under short-circuit conditions, the motor starter components (contactor and overload) suffer no damage or risk to personnel, requiring only minor contact inspection before being placed back into service. ABB contactors are pre-tested and certified alongside ABB manual motor starters and MCCBs to achieve seamless Type 2 compliance.
