www.sentera.eu
MIW-SC2A4-EN-000 - 22 / 02 / 2021
4 - 8
PRODUCT DESCRIPTION
The SC2A4 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
controller makes it possible to select two optimal motor speeds and to switch these
by a contact (e.g. day / night control). In this way important energy savings can be
realised. The used technology provides a regulated output voltage with a perfect
sinusoidal shape.
ARTICLE CODES
Article code
Rated max. current [A]
SC2A4-15L55
1,5
SC2A4-25L55
2,5
SC2A4-40L55
4,0
SC2A4-60L55
6,0
SC2A4-80L55
8,0
SC2A4110L55
11,0
INTENDED AREA OF USE
■
Speed control of voltage controllable 400 V three-phase motors (pumps and fans)
■
For indoor use only
TECHNICAL DATA
■
Supply voltage: 3x 400 VAC / 50—60 Hz
■
Wide power range: 1,5 A—11,0 A
■
Unregulated output: 230 VAC / 2 A
■
Each speed adjustable by 5-step rotary switches (knobs) plus off-position
■
Normally closed contact for external clock (high / low switching)
■
Two start / stop contacts for remote ON / OFF switching
■
LED status indication
■
Two speeds selectable by external contact (e.g. clock )
■
Enclosure: sheet steel (RAL 7035, polyester powder coating)
■
Protection standard: IP54 (according to EN 60529)
■
Operating ambient conditions:
►
Temperature: -20—35 °C
►
Rel. humidity: 5—95 % rH (non-condensing)
STANDARDS
■
Low Voltage Directive 2014/35/EC
■
EMC Directive 2014/30/EC: EN 61326
■
WEEE Directive 2012/19/EC
■
RoHs Directive 2011/65/EC
THREE PHASE 400 VAC TWO-SPEED TRANSFORMER
CONTROLLER WITH TK AND START / STOP
SC2A4
