1. In the circuit, it plays the role of switching on and off the power supply, and also has the effect of undervoltage release. When the circuit pressure is 0, it can control a large capacity and is used to control the circuit, which has a long service life and reduces the impact of the circuit on the entire power grid.
2. AC contactors are used in electric power, when the current is relatively large, it can also be allowed to pass, so it actually has a function of overcurrent or protection.
3. When lightning strikes, if there is lightning in the wire, it can automatically cut off the power supply, so as to protect the home appliances from damage, the most direct performance is the problem of tripping.
Type EHDB
• 220 amps to 960 amps
• 2 pole (2 N.O.) and 3 pole (2 N.O. & 1 N.C.)
power poles available
• 600 VDC making capacity:
300 VDC breaking capacity
• 1 N.O. & 1 N.C. auxiliary contacts are
standard and up to six additional auxiliary
contacts may be added to provide a total of
8 (4 N.O. & 4 N.C.)
• Early make & late break auxiliary contacts
available
• Auxiliary contacts available to meet
elevator standards
• EHDB 220, 280 & 360 contactors have
withdrawable coils
• Mechanically interlocked contactors
available for reversing applications
• Double break contact design with magnetic
arc chamber extinguishes arc in shortest
possible time
• High temperature encapsulated coil
• Easy removal of arc chute for quick
inspection and change of contacts
• Operates over an extended voltage range of
85% to 110% of rated control voltage
• DC control operation available
• UL & CSA approved
UL File # E36588
CSA File # LR19700
ABB has an extensive product line that includes a full range of power and distribution transformers, high, medium and low voltage switchgear products, AC and DC power transmission and distribution systems, power automation systems, a wide range of measurement devices and sensors, real-time control and optimisation systems, robotics hardware and software and simulation systems, energy-efficient motors and drives, power quality, conversion and synchronisation systems, fusing and switching devices for the safety of power systems. These products are used in a wide range of industrial, commercial, power and utility applications.
Power Systems Division: The Power Systems Division offers a complete range of systems and services for transmission and distribution networks and power plants worldwide, with a focus on substations and substation automation systems. In addition, the division offers Flexible AC Transmission Systems (FACTS) and High Voltage Direct Current (HVDC) transmission systems as well as grid management systems. In the Power Generation business area, the Power Systems Division offers instrumentation products as well as control and auxiliary devices for power plants.
Discrete Automation and Motion Control: The Discrete Automation and Motion Control segment supplies products, solutions and services that help customers improve productivity and energy efficiency. Its motors, generators, drive systems, programmable logic controllers, power electronics and robotics products are used in a wide range of automation applications in the areas of power, motion and control. The business segment’s leadership in the wind turbine industry and its growing product line in the solar sector will further contribute to the development of the existing skills, channels and operating platforms of the Discrete Automation & Motion Control division in the industrial sector.
Power electronics: SYNCHROTACT Concurrent equipment, control systems.
