ABB Electromechanical Relays
ABB electromechanical relays are widely recognized for their reliability and performance, serving a broad spectrum of applications from industrial to utility needs. The development of these relays over the years has been geared towards meeting the stringent demands of these applications, ensuring stable and secure operations across various electrical systems.
The relays work through mechanical mechanisms operated by electromagnetic forces, which physically manipulate electrical switches. This traditional design is valued for its durability and the definitive separation it provides between control and switched circuits, a crucial aspect in many electrical setups. The enduring reliability of ABB's electromechanical relays is backed by decades of refinement and use under challenging conditions.
ABB's line-up includes relays specifically engineered for distinct uses such as power protection, automation, and control, with each relay type boasting characteristics like high breaking capacity and accurate performance suited to both standard and rigorous environments.
Relays: Electromechanical vs Solid State
Electromechanical Relays
Electromechanical relays (EMR) use physical moving parts to achieve the desired functionality. These moving parts include the contacts that switch between the normally open and normally closed stationary contacts in the relay. This movement is made possible by an electromagnet. When power is applied to this magnet, it will act on the movable contact causing the relay to switch. In an EMR, it is common to hear the switching sound that is represented as a “clicking” noise. This audible noise can be helpful when determining the functionality of the relay.
Solid State Relays
Solid state relays (SSR) use a low power, electrical signal to generate an optical semiconductor signal that will transmit and energize an output signal. When this is activated, the input optical signal will act as the switch, allowing a higher voltage signal to pass through the relays output components. The internal circuitry of a SSR is far more complex than an EMR, but there are no physical moving parts.