3TF48，3TF49 AC contactor instruction manual, introduces the installation, wiring, operation and maintenance of the product.
This manual provides step‑by‑step instructions for installing the Siemens 3TF48 and 3TF49 contactors, including mounting dimensions, screw torque values and protective measures for dusty or corrosive environments. Detailed wiring tables list permissible conductor cross‑sections for both main and auxiliary terminals, along with tightening torque specifications.
Operational guidance covers safe handling, voltage ratings, status indicators, and procedures for inspecting and replacing main contacts, arc chutes, magnet coils and auxiliary contact blocks. Technical data such as weight, temperature limits, rated voltage and current values are summarized for quick reference. This manual is written in Chinese.
| Weight | approx. 2.3 kg |
|---|---|
| Rated insulation voltage (Ui) | AC 1000 V |
| Rated operating current (Ie/AC‑1, 55 °C, up to 690 V) | 100 A (both models) |
| Maximum mounting screw torque | 6.2 Nm |
The mounting screws must be tightened to a maximum torque of 6.2 Nm.
Remove dust by suction; do not use lubricants or sharp objects.
Disconnect the power and ensure that qualified personnel perform the work.