3*400 V two speed transformer fan speed controller with TK + run/stop
The SC2A4 transformer speed controllers are based on the principle of voltage control with auto-transformers. They are applicable to voltage-controllable motors (400 V, 50/60 Hz) to control the rotational speed (of fans, pumps, etc.). This controller makes it possible to select 2 optimal motor speeds and to switch these by a contact. So, important energy savings and an increase of comfort can be realised. E.g. Day/Night control. They are fitted out with (TK) contacts for thermal motor protection and for external or remote starting and stopping.
400 Vac - 50/60 Hz - from 1,5 up to 11 A
2 switches: 5 positions with Off-position
Indicator light + on/fault
230 Vac unregulated output
Autoreset after supply failure
Motor protection, by connecting thermal (overheating) contacts of the motor
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