The STR-4 series of transformer fan speed controllers regulate the rotational speed of three-phase voltage controllable motors by varying the output voltage. They are equipped with auto-transformers and control the speed manually in five steps. The used technology provides a regulated output voltage with a perfect sinusoidal shape.

Supply: 230 VAC / 50—60 Hz

Unregulated output: 230 VAC, 2 A

Protection standard: IP54 

Temperature: -20—35 °C

Rel. humidity: 5—95 % rH

Rated max. current (A): 4

I (A): 4

DIMENSIONS (mm):

A=300

B=325

C=185

D=255

E=255

• Wide power range: 1,5 A—14,0 A

• 5-step rotary switch for manual control plus off-position

• LED status indication