XR relay has been developed for specific applications, and suitable for use with type AR relay range. It is an electro-mechanical relay with a consistent positive action, a long service life and complying with the appropriate requirements of IEC 60255. The XR351 has three attracted armature elements. It incorporates a time delay on de-energisation, to keep the relay in an operated condition, during temporary reduction in the battery voltage. Features Low burden Preclose supervision