Idiomas disponibles
Idiomas disponibles
1. Product features
1.1. Description
The Digital Transformer Ratiometer TR8703 is a lightweight, rugged,
portable instrument designed for onsite testing of power, potential and
current transformers.
Operation of the TR8703 is fully automatic. No user calibration, range
selection, hand cranking or tedious balancing is required.
During each test cycle, the TR8703 automatically checks for:
H/X lead reversal
Continuity of tested circuits/windings (if configured)
Short circuit conditions (high current)
Upon completion of a test cycle, the TR8703 displays:
Turns Ratio: The ratio of the primary to secondary voltage at the trans-
former terminals due to test excitation
Excitation Current: The RMS excitation current in the H winding due to
test excitation during negligible loading of the associated X winding
Polarity: Indicates the polarity (phase) of X relative to H
Deviation: Indicates the deviation from nameplate ratio in %
Turns Ratio, Excitation Current, Polarity and Deviation are useful
parameters in diagnosing and predicting a variety of faults that occur in
power, potential and current transformers.
The TR8703 will display the following messages:
Incorrect Lead Connections
H/X Reversal (accidental step-up misconnection)
Short (excess excitation current)
Open Circuits
Circuit Continuity
Low Battery
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