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Earth Testers

SEW 6221EL 3 Phase RCD Tester
The SEW 6221EL is an easy-to-use tester that's designed to test single and three-phrase RCD's, while also containing 3 phase rotation. It also features a simple menu interface, rotary dial for choosing the RCD current and robust case for protection.
  • Tests single & 3 phase RCD's
  • In-built phase sequence indicator
  • Measures trip time or trip current