Instruction manual of 3TF30, 3TF31 AC contactors, including installation, wiring, operation, maintenance and technical data.
This manual covers safe installation of the 3TF30 and 3TF31 AC contactors, including mounting on a 35 mm DIN rail or using M4 screws with washers. Detailed wiring instructions specify permissible conductor sizes, tightening torque, and the use of 75 °C copper wire.
Operational guidance explains how to observe the contactor’s state, the required control voltage, and maintenance procedures such as coil and auxiliary contact replacement. Technical data tables list dimensions, weight, temperature ranges, electrical ratings, and short‑circuit protection details. This manual is written in Chinese.
| Weight (AC operation) | ≈ 370 g |
|---|---|
| Weight (DC operation) | ≈ 580 g |
| Permissible ambient temperature (operation) | -25 °C to +55 °C |
| Permissible ambient temperature (storage) | -50 °C to +80 °C |
| Rated insulation voltage Ui AC | 690 V |
| Rated operating current (open model) | A 20 |
| Motor rating at 230 V/220 V | 2.4 kW (3TF30) / 3.3 kW (3TF31) |
| Short‑circuit protection (fuse) | NEOZED/DIAZED, gL(gG) A 16 |
| Terminal tightening torque (main) | 0.8–1.4 Nm (7–12 lb·in) |
| Terminal tightening torque (auxiliary) | 0.8–1.1 Nm (7–10 lb·in) |
| Protection degree | IP20 |
The main terminal screws should be tightened to 0.8–1.4 Nm (7–12 lb·in).
The contactor has a protection rating of IP20 according to IEC 60529.
Solid conductors 2 × 0.5–1 mm², 2 × 1–2.5 mm², 1 × 4 mm²; stranded conductors with end sleeve 2 × 0.75–2.5 mm²; AWG 18–12 wires.