Schneider Electric LR9D08 TeSys LRD Electronic Overload Relay 1.6-8 A Class 5-30 LC1D Relay

The Schneider Electric LR9D08 is a TeSys LRD electronic thermal overload relay with a 1.6-8 A adjustment range and a selectable class 5-10-20-30 trip curve, protecting 3-phase motors from 0.75 to 3 kW at 400 V with phase-failure and load-unbalance detection.

Technical Specifications

Certifications & Standards

• IECEE CB Scheme
• UL
• CSA
• CCC
• IEC 60947-4-1
• IEC 60947-5-1
• GB/T 14048.4
• GB/T 14048.5

Selection Notes

Set the 1.6-8 A dial to the motor's actual full-load current for the protection from 0.75 to 3 kW at 400 V, and leave the class dipswitches at class 10 unless the duty cycle calls for a faster (class 5) or slower (class 20/30, high-inertia loads) trip curve. Phase-unbalance and phase-loss detection trip the relay ahead of the thermal element on a single-phasing fault, a protection the equivalent non-differential bimetallic relays in the LRD range do not provide. It mounts directly under the contactor's bottom terminals; the LAD7B205 terminal block is required only for separate-from-contactor mounting.