User manual for the YTC642 insulator zero‑value tester, describing operation, specifications, maintenance and transport.
The YTC642 insulator zero‑value tester is designed for on‑line measurement of insulator string voltage distribution on AC lines from 10 kV to 500 kV, and for laboratory testing of 35 kV and other AC voltage insulators. It uses a static‑electric structure with high impedance, providing minimal impact on the measured system and displays results on an LCD.
The manual covers the principle of operation, step‑by‑step usage instructions, technical parameters, maintenance procedures, transport and storage guidelines, unpacking checks, accessories list and safety precautions. This manual is written in Chinese.
| Measurement range | 1~30 kV |
|---|---|
| Inter‑electrode withstand voltage | 40 kV |
| Inter‑electrode capacitance | 2 pF |
| Output display | LCD digital display |
| Power supply | DC 9 V rechargeable battery |
| Dimensions | Ø100 mm × 34 mm |
| Weight | 500 g |
If the measured potential difference of an insulator is 0 kV, the insulator is identified as a zero‑value insulator.
Recharge the battery for about one hour; the instrument will show an under‑voltage symbol in the upper left corner of the display.