The Schneider Electric LRD15326 is a TeSys Deca differential thermal overload relay for motor protection, with a thermal protection adjustment range of 25...32 A and a Class 20 tripping curve per IEC 60947-4-1. It provides phase failure sensitivity — tripping at 130 % of Ir on two phases when the third is at 0 — and a tripping threshold of 1.14 +/- 0.06 Ir conforming to IEC 60947-4-1. The relay is rated for a power circuit operational voltage of 690 V AC at 0...400 Hz and carries a rated insulation voltage of 690 V per IEC 60947-4-1 (600 V per UL/CSA).
The LRD15326 is classified as Obsolete by the manufacturer.
The 25...32 A adjustment range and Class 20 thermal memory mean this relay is sized for a motor with a full-load current in that band, and it allows a longer start duration (up to 20 seconds at locked-rotor current) before tripping — typical for high-inertia loads like fans or centrifuges. The 1 NO + 1 NC auxiliary contact composition provides a standard alarm and trip signal pair for the control circuit, rated at 1.5 A at 240 V AC-15 and 0.1 A at 250 V DC-13. Mounts under the contactor or on a plate/rail with specific accessories; the 45 mm width and 92 mm depth fit the standard TeSys Deca footprint.
Certified to EN/IEC 60947-4-1, EN/IEC 60947-5-1, UL 60947-4-1, UL 60947-5-1, and CSA C22.2 No 60947-4-1 and 60947-5-1 — accepted in North American and European panels. IP20 finger-safe protection per IEC 60529; suitable for enclosed panel mounting.