The ATO 3-pole AC contactor has the advantages of compact size and easy connection. High Performance and long electrical life. Greater environmental immunity. Sealed structure which improves its safety features.
As contactors are used for high-current load applications they are designed to control and reduce the arc produced when the heavy motor currents are interrupted. Other than the low current contacts, they are also setup with Normally Open contacts. These are devices which handle more than 20 Amperes current and over 100 Kilo Watts power.
When current is passed through the contactor, the electromagnet starts to build up, producing a magnetic field. Thus the core of ac contactor starts to wind up. This process helps in energizing the moving contact. Thus the moving and fixed contacts make a short circuit. Thus the current is passed through them to the next circuit. The armature coil brings in high current in the initial position. This reduces as soon as the metal core enters the coil. When the current is stopped, the coil gets de-energized and thus the contacts get open circuited.
See more information on: https://www.ato.com/40-amps-contactor.
ATO 20 hp VFD converts power to a usable form. In the case of an induction motor, the electrical power supplied to it is converted to mechanical power through the rotation of the motor's rotor and the torque that it produces through motor slip. On the other hand, 20 hp VFD will convert its incoming power, a fixed voltage and frequency, to a variable voltage and frequency. This same concept is also the basis to vary the speed of the motor without the need of adjustable pulleys or gearing changes. The most significant benefit to using an 20hp VFD is energy saving. By matching system capacity to the actual load throughout the entire year, major savings in system motor energy use are achieved.
In comparison to a mains-powered motor with direct starting, ATO VFDs can reduce the starting current by up to 80% without affecting the starting torque. By enabling lower starting currents, the energy grid is placed under less stress when motors are powered up, reducing the impact on other local grid energy consumers. The resulting lower energy frequency fluctuations also mean that failures of electrical equipment can be reduced.
