All-in-one designed Relay Test Set: built-in industrial computer, embedded style Windows CE system, with stable and reliable performance; mouse and keyboard built in panel or external connection available; LCD display; Windows operation interface; Adopt EMC box and obtained CE. All-in-one designed Relay Test Set: built-in industrial computer, embedded style Windows CE system, with stable and reliable performance; mouse and keyboard built in panel or external connection available; LCD display; Windows operation interface; Adopt EMC box and obtained CE. A relay protection tester is a device used to test and verify the performance of relay protection devices in power systems. One of its core functions is protection testing, which aims to ensure that relay protection devices operate correctly under various fault and operating conditions. Automatic Relay Tester, Protectio Relay Test Set, Standard Power & Calibrator, RTU-Tester, Ct Analyzer, Multifunctional Power Meter, Test Relays, Power Standard Source, Current Transformer Analyzer, Power Management System Basic Info. Chinese top manufacturer. Compact relay test set for quick and easy manual three-phase testing Ultra-portable test set for primary and secondary injection, as well as basic protection tests Modular, multi-phase protection relay test set and commissioning tool Compact relay test set for quick and easy manual three-phase. Ensure the reliability and safety of your protection system with Megger's specialised tools and accessories—ideal for testing auxiliary relays and handling complex or critical applications with precision and confidence.