The utility model relates to a testing arrangement of other polarity of portable winding link group belongs to power supply testing tool technical field. Technical scheme: the experimental red button (1) that pins, dry battery (2), change over switch (3), direct current millivoltmeter (8) set up the inside in case shell (7), it is inboard at the instrument shelter cap of case shell that the setting is pasted in metal covering balance sheet (9), dry battery, the experimental red button that pins, change over switch connects gradually, the direct current millivoltmeter has threely, conducting rod insulating clamp (5) have six, special test wire (4) have six, special experimental jack (6) have six, the three corresponds mutually, connect gradually and form test channel. The utility model discloses the wiring is simple and convenient, has advantages such as easy operation, test data accuracy, adopt the direct current method to test three -phase power transformer wiring group and CT polarity, furthest assurance test personnel's safety, it is direct attached inboard at the instrument lid with transformer wiring group balance sheet, be convenient for compare.