Three-phase transformer for A3RW 4.0/1/S/IP 21 speed controller 17886-9989

Transformer, industrial A3RW controllers for speed control of voltage-controlled three-phase fan motors. Installed in professional
ventilation or heating installations. A rotary knob located on the panel of the metal housing is used for five-step setting of the rotational speed.
Equipped with an independent switch and an alarm signaling lamp.
The control circuit of the regulator is protected by a fuse. Built-in frost protection (FS contacts) and motor thermal protection (TK contacts). Execution
in class II insulation. Degree of protection IP21. max. ambient temperature 25°C. Insulation thermal class B (130°C). Manufactured in accordance with EN 61558-2-13. 5-step regulation: 95-145-190-240-400 Ur[V].