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Thank you very much for selecting our products
!
For your better use of this instrument, you are kindly requested to
read this manual carefully before you use it, so as to understand its
major performances and operation method.
Caution
:
①
It is not allowed to remove the wiring and directly switch off the
power supply during the measurement.
②
For the no-load voltage regulating transformer, it is not allowed to
switch the tapping switch during the measurement.
③
In case of a sudden power failure during the measurement, this
instrument can discharge automatically. Please do not remove
the wiring immediately. Wait for at least 30 seconds before the
connection can be removed.
④
The three-phase measurement applies to the windings of YN
connection. For the windings of yn connection, since difference
exists between the three-phase and single-phase measurement
results due to the effect of the resistance of the copper bus
connected, the single-phase measurement is recommended.
⑤
Caution: The three-phase measurement result doses not include
the resistance value of the neutral lead. Therefore, it is
suggested to at least verify one data using the single-phase
testing method for each phase after completing the
measurement of three-phase resistance value, so as to
determine if the neutral lead is normal.
I. General
This fast DC resistance tester (hereinafter referred to as DC resistance
tester) is the product of the latest generation for measuring the DC resistance
of transformer and is optimally designed for measuring the DC resistance of
the three-phase winding of the large-capacity transformer. It can measure the
DC resistance of the three-phase winding at the same time. In case of the
on-load voltage regulating transformer, it is not required to discharge but to
directly adjust the tapping switch. The measurement time is one third of the
traditional single-phase measurement, greatly shortening the working time and
labor intensity. As the DC resistor tester is provided with large-screen LCD and
the graphical interfaces in Chinese, the operation is visual, clear and easy.
