NOVUS 8824811080 SSR3-4880 Three Phase Solid State Relay, 80A

NOVUS, 8824811080, SSR3-4880 Three Phase Solid State Relay, 80A / 480 Vac

Features:

• Solid-state relays (SSRs) are electronic switching devices designed to control both resistive and inductive loads, and they offer significant advantagesover traditional electromechanical relays.
• When a control signal (INPUT) is applied, the SSR activates the connected load at the output terminals (OUTPUT) without producing electrical noise,arcing, or mechanical wear. Internally, the relay incorporates a snubber circuit to protect the thyristor and a zero-crossing detection system thatensures switching occurs precisely at 0 V for turn-on and 0 A for turn-off.
• Optical isolation separates the INPUT from the OUTPUT, providing enhanced safety and signal integrity, while an integrated LED indicator clearlyshows whether the relay is energized or not.

The Solid State Relays (SSR) are electronic devices used for switching resistive or inductive AC loads, with many advantages over conventional relays. A control voltage applied to the device's INPUT turns the SSR ON, energizing the load. The conduction effectively occurs at the next zero crossing of the mains voltage. When the INPUT signal is removed, the SSR turns OFF when the load reaches a current equal to zero.

This means that the load switching may be delayed by 1/2 of the mains period. Turning the output ON and OFF only on the mains voltage zero crossing brings important performance advantages to the system: practically no EMI is generated during the load switching and the SSR is submitted to less severe switching conditions. On the other hand, the SSR is suitable to AC loads only (it cannot be used to switch DC loads).