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54
Three-phase energy meter field calibrator
the measurement data, press the
【
EXIT
】
key to exit, and come back to the main interface.
Measure the transformation ratio of other phases by clipping the large and small
clip-on ammeter onto the primary current and secondary current of TA of the phase to be
measured, respectively.
If the phase angle> 5° but <10°, the secondary load of TA may be too heavy, including
bad connection terminal; if the phase angle> 10° but <90°, the fault phase angle of the
secondary circuit or transformer may be 180° or so, and the direction of a clip-on ammeter
may be reverse.
Note:
1. the transformation ratio measurement is only limited to low-voltage system, remember not
to use the instrument to measure TA transformation ratio of high-voltage system;
2. In the process of transformation ratio measurement of low-voltage system, it is proposed
that the measurement terminal supplies power voltage.
3. When doing the electrical inspection, if the secondary contact of TA is bad, the secondary
terminals of TA should be first of all shorted, and then deal with the corresponding fault;
4. In order to ensure the accuracy of measurement, it should ensure that the clamp mouth is
clean.
Summary of Contents for HZGC3521 Series
Page 8: ...7 Three phase energy meter field calibrator 1 2 Introduction to top panel structure...
Page 9: ...8 Three phase energy meter field calibrator 1 3 Introduction to right panel structure...
Page 10: ...9 Three phase energy meter field calibrator 1 4 Back Introduction...
Page 31: ...30 Three phase energy meter field calibrator 2 7 Description of Function Keys...
Page 40: ...39 Three phase energy meter field calibrator...
Page 70: ...69 Three phase energy meter field calibrator...
Page 79: ...78 Three phase energy meter field calibrator...