Precision Automatic Ratio Tester / Three-Phase Single-Phase Test Operation Instructions
1. Connect the ground wire to ensure the instrument is reliably grounded.
2. Wiring:
Correctly connect the test clamps according to the transformer under test.
a. Single-phase transformer: Connect the yellow and black clamps of the high-voltage cable to the high-voltage side terminals of the transformer under test.
Connect the yellow and black clamps of the low-voltage cable to the low-voltage side terminals of the transformer under test.
b. Three-phase transformer (Method 1): Connect the three-color clamps of the high-voltage and low-voltage cables according to yellow, green, and red corresponding to phases A, B, and C respectively.
c. Three-phase transformer (Method 2): Connect the four-color clamps of the high-voltage and low-voltage cables according to yellow, green, red, and black corresponding to phases A, B, C, and neutral point O respectively.
Precision Automatic Ratio Tester/Three-Phase Single-Phase Safety Measures
1. Before using this instrument, be sure to read this manual carefully.
2. The operator of the instrument should have general knowledge of electrical equipment or instruments.
3. The instrument should be reliably grounded when in use.
4. The power supply for this instrument is internal lithium-ion battery or AC220V±10% 50/60HZ±1HZ
5. The instrument outputs high voltage, so pay attention to safety to prevent electric shock.
6. This instrument can be used indoors and outdoors, but avoid use in harsh environments such as rain, corrosive gases, excessive dust, high temperature, direct sunlight, etc.
7. The instrument should avoid severe vibration.
8. Maintenance, care, and adjustment of the instrument should be performed by professionals.
9. The yellow, green, red, and black test clamps correspond to phases A, B, C, and O of the transformer respectively. Do not reverse the high and low voltage cables.
10. For single-phase measurement, only use the yellow and black clamps. Do not use them incorrectly. Unused test clamps should be left floating.
Product Features
1. Wide test range, up to 0.9 to 10000.
2. Fast test speed, completes three-phase test in 11 seconds.
3. Can test CT, PT, CVT, and Z-connected transformers.
4. Has blind test ratio and group test functions.
5. Multiple measurement modes for easier fault diagnosis.
6. Non-volatile clock and date display, data storage for 480 groups, data not lost on power failure.
7. Large screen color LCD display, clear and easy-to-read data. RS485 communication interface and USB storage interface.
8. The instrument has high and low voltage reverse connection protection, transformer short circuit, inter-turn short circuit protection, and power supply misconnection to 380V protection.
9. Thermal printer printing function, fast and silent.
10. Small size and light weight.
