⏱️ Category
Timers & Monitors
Industrial timing relays, voltage/current/phase monitors, and solid-state relays that protect and sequence equipment.
Anderson-Bolds supplies industrial timers and timing relays from ATC and SSAC, three-phase and voltage/current monitor relays from ATC Diversified, and solid-state relays from Carlo Gavazzi. Phase monitors protect three-phase motors from phase loss, reversal, and unbalance.

ATC Diversified
ATC Diversified 3-Phase Voltage Monitor Relay, 440V
SKU: ATCD-SLA-440
In stock — ships today
$134.00

Carlo Gavazzi
Carlo Gavazzi RM1A Solid-State Relay, 50A 480V
SKU: CG-RM1A48D50
Low stock — order soon
$118.00
Timers & Monitors — questions buyers ask
What does a phase monitor relay protect against?
It protects three-phase equipment from phase loss, phase reversal, voltage unbalance, and over/under-voltage by opening a control contact before the fault damages the motor.



