Schneider Electric LRD14 Overload Relay 7-10 A

Schneider Electric LRD14 Overload Relay

The Schneider Electric LRD14 is a differential thermal overload relay designed for industrial motor protection. It pairs with TeSys D contactors rated from 9 to 38 amperes to form a complete motor starter. The unit features an adjustable trip current range of 7 to 10 amperes calibrated to Class 10A. Multi-standard certification includes IEC, UL, CSA, CCC, EAC, ATEX and Marine approvals.

Replaces fixed-trip or lower-rated relays

Upgrading to this adjustable 7-10 A relay is worthwhile when motor full-load current falls inside that window and the existing starter uses a TeSys D contactor up to 38 A. The Class 10A trip curve suits standard motor acceleration profiles. It is not for applications requiring a trip setting below 7 A or above 10 A, nor for contactors outside the 9-38 A TeSys D range.

Practical limits of thermal overload protection

Thermal sensing reacts to sustained overcurrent rather than instantaneous short circuits, so a separate short-circuit protective device remains necessary. The relay mounts directly to the contactor, so panel space must accommodate the combined assembly. Ambient temperature compensation is built in, but extreme environments beyond the certified standards may affect trip accuracy.