---
---
57
Three-phase energy meter field calibrator
3. When error connections are identified, the power factor can not be on the basis of COSФ
displayed by the instrument itself, because if the field connection is wrong, COSФ does
not reflect the real power factor of the load.
4. When checking lines, if the current phase angle is asymmetric and is too large, it could not
find the error. Especially at a low load, it is common.
5. In practice, COSФ is generally inductive, and the probability of capacitivity is very low. If
you suspect it is capacitive, you can cancel the reactive capacitive power compensation,
when it is inductive. Under a high-voltage field, COSФ is generally 0.5L-1. When the
low-voltage COSФ is less than 0.5L, if the result of COSФ = 0-0.5L is correct, the
connection is correct. Capacitive loads are rare, and at this time COSФ = 0-0.5L and
0.5L-1 results are used as the basis.
6. Line can be checked by any method of current input.
7. After errors in the wiring are found, change the HDGC-8800 wiring according to the type of
error found, and re-check the line, and the results should be correct. If it is capacitive,
should carefully check whether the power factor is correct. At this point, the error measured
can be used as reference to make up for the electric quantity.
Prerequisite for the correct search line:
Three-phase three-wire
three-phase four-wire
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...