Landis+Gyr E650 Series 4 User Manual page 25

Device description
Direction of rotating
field
True total harmonic
distortion
D000062026 en a – E650 Series 4 – ZMD400AT/CT, ZFD400AT/CT – User Manual
Figure 15. Phase angle case 1
Case 2: The voltage angles are displayed as in case 1. The angles of the
currents are displayed, however, with reference to the associated phase
voltage and can have values between -180° and +180°.
Figure 16. Phase angle case 2
The direction of the rotating field is calculated by the microprocessor based
on the phase angle of the 3 voltages. If the direction of rotation
corresponds to that specified by the parameterisation, the phase voltage
indications L1, L2 and L3 are continuously lit. Otherwise they flash every
second.
The TTHD information is calculated based on a comparison of the values of
the harmonic contents and the value of the fundamental.

TTHD of active power

TTHD of phase voltage

TTHD of phase current

TTHD of voltage

TTHD of current
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