Option L – Coil P/U LED Option C – Operation counter Contact & self reset flag hand reset button Hand reset flag button Cover ON Hand reset flag Armature flag Order code Serial number Voltage rating Option S – Electrical reset isolation switch Front Panel Layout Figure 1: Front panel layout depicting flags, resets & option positions The flag and reset positions for the five contact TR5 version are set lower on the front panel. Alpha TR Series The Alpha TR Series represents a new generation of high speed electro-mechanical tripping relays for power utility protection and control applications. The TR is built on the Alpha relay platform and provides high performance and reliability while reducing production and supply lead times. Application of the TR multi-contact high-speed trip relays ensures fast operation of less than 8 ms. The unique patented design and topology ensures minimal contact bounce. Model Designation Five (5) contact version: TR5 Twelve (12) contact version: TR12 Alpha TR/ v01.1 / 05/06/2025 – 3/17
