The unit is built for standalone mounting and uses screw terminals on both the main and auxiliary circuits.
Rated for 50/60 Hz operation, which covers the standard industrial line frequencies worldwide. The 8 kV surge voltage resistance means the relay's insulation can handle the transient spikes common in motor starter panels without flashover — important when the contactor upstream is switching inductive loads. Three poles for the main current circuit, as expected for a three-phase motor protection device. The environmental range is broad: transport from -55 to +80 °C, and operating humidity from 0 to 90 %. That covers most non-condensing industrial enclosures, from unheated warehouses to warm control cabinets near the process.
Deployment context
This size S6 overload relay is designed for single mounting alongside a matching S6 contactor in a motor starter assembly. The screw terminals accept the larger cable sizes needed for 120-150 A circuits — expect lug-type connections on the main circuit. The manual/automatic reset selector gives the panel builder the choice: manual reset for attended equipment where you want someone to physically acknowledge a trip, or automatic for remote or unmanned installations.