Phase Sequence Tester
DER EE DE-721 /DE-721B Phase Sequence Tester has a 90 to 600 Volt rated range for testing phase orientation of 3-phase power sources over a 45 to 70Hz frequency range.
Equipped with built-in magnet and carry case , DER EE DE-721 /DE-721B Phase Sequence Tester is easy to use anywhere .
Equipped with built-in magnet and carry case , DER EE DE-721 /DE-721B Phase Sequence Tester is easy to use anywhere .
