YC-1893 series three-phase EEM calibrator

Technical features:
1) The output voltage, current, phase and frequency can be adjusted
coarsely, intermediately and finely with a 12-key program controlled
keyboard, selecting and combining various calibration points quickly
and accurately.

2) Cooperating with a computer EEM automatic calibration and management
system, it can realize the automation of EEM calibration data management
and output print. Link with the electrical network is also possible.

3) The automatic match design in the current power amplifier greatly
raises the usability of all current ranges, thus ensuring the
reliability in calibrating, meters with different input impedance.

4) Automatic switch of output current ranges.

5) The maximum output is capable of implementing simultaneous
calibration of 40 sets of 100A meters.

6) The function of presetting the full range current value increases
the adaptability to calibrate various EEM with different rated current.

7) The change of output voltage phase symmetry form zero load to full
load is less than 0.3

8) The electronic phase shifter provides phase shift for both voltage
and current

9) The Y-V transformation varies synchronously as the voltage
selections with setting

10) Private microcomputer and feedback sampling circuit make the whole
phase symmetry less than 0.3

11) Voltage overload and shout-circuit protection, current open-circuit protection
and associated audio and visual alarms are provided.

12) Three-phase 4-line or single-phase power supply is used.