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Summary of Contents for Sentera STRA4
- Page 1 STRA4 3-PHASE 400 VAC TRANSFORMER CONTROLLER WITH TK AND START / STOP Mounting and operating instructions...
- Page 2 SAFETY AND PRECAUTIONS PRODUCT DESCRIPTION ARTICLE CODES INTENDED AREA OF USE STANDARDS OPERATIONAL DIAGRAMS WIRING AND CONNECTIONS MOUNTING INSTRUCTIONS IN STEPS VERIFICATION OF INSTALLATION TRANSPORT AND STORAGE WARRANTY AND RESTRICTIONS MAINTENANCE MIW-STRA4-EN-000 - 14 / 08 / 2018 2 - 8 www.sentera.eu...
- Page 3 In case there are any questions that are not answered, please contact your technical support or consult a professional. MIW-STRA4-EN-000 - 14 / 08 / 2018 3 - 8 www.sentera.eu...
- Page 4 CONTROLLER WITH TK AND START / STOP PRODUCT DESCRIPTION The STRA4 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. They feature TK monitoring for thermal motor protection, contacts for remote start / stop and a 230 VAC alarm output.
- Page 5 Input - normally closed contact for remote ON /OFF switching Input - normally open contact for remote ON /OFF switching ATTENTION Make sure you use cables with an appropriate diameter. MIW-STRA4-EN-000 - 14 / 08 / 2018 5 - 8 www.sentera.eu back to the table of contents...
- Page 6 CONTROLLER WITH TK AND START / STOP MOUNTING INSTRUCTIONS IN STEPS Before you start mounting the STRA4, read carefully “Safety and Precautions” and follow these steps. Choose a smooth solid surface for installation (a wall, panel, etc.). Follow these steps: Open the door of the controller.
- Page 7 5 steps by changing the internal wiring. Table 1 Voltage series Knob position Regulated output [VAC] L40 version L50 versions 130* Unregulated output [VAC] * Available but not connected. MIW-STRA4-EN-000 - 14 / 08 / 2018 7 - 8 www.sentera.eu back to the table of contents...
- Page 8 In case of heavy pollution, clean with a non-aggressive product. In these circumstances the unit should be disconnected from the supply. Pay attention that no fluids enter the unit. Only reconnect it to the supply when it is completely dry. MIW-STRA4-EN-000 - 14 / 08 / 2018 8 - 8 www.sentera.eu...
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